EP1263655B1 - A resealable bag for filling with food product(s) and method - Google Patents
A resealable bag for filling with food product(s) and method Download PDFInfo
- Publication number
- EP1263655B1 EP1263655B1 EP00965065.6A EP00965065A EP1263655B1 EP 1263655 B1 EP1263655 B1 EP 1263655B1 EP 00965065 A EP00965065 A EP 00965065A EP 1263655 B1 EP1263655 B1 EP 1263655B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- web material
- predetermined
- tear
- zipper
- fold
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D33/00—Details of, or accessories for, sacks or bags
- B65D33/16—End- or aperture-closing arrangements or devices
- B65D33/25—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners
- B65D33/2508—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B70/00—Making flexible containers, e.g. envelopes or bags
- B31B70/74—Auxiliary operations
- B31B70/81—Forming or attaching accessories, e.g. opening devices, closures or tear strings
- B31B70/813—Applying closures
- B31B70/8131—Making bags having interengaging closure elements
- B31B70/8132—Applying the closure elements in the machine direction
Definitions
- the present invention relates generally to the field of reclosable bags and more specifically to reclosable bags that use or incorporate tamper evident, hermetic seal, and reclosable fastener assemblies or mechanisms of the slider, zipper, or press-to-close type.
- the present invention is particularly concerned with a reclosable bag that may be filled with a food product at a factory or food processing plant and then sealed to protect the food product until such time as a customer purchases the reclosable bag and opens it to access the food product within.
- Reclosable, typically flexible, containers are well known in the art. Such containers normally comprise a bag-like structure made from a folded web of material, like thermoplastic film. These types of containers may also include reclosable zipper structures, as well as interlocking male and female zipper elements fused, extruded, or attached to the bag sidewalls. Alternatively, the reclosable zipper structures, mechanisms, or assemblies may also be identified as slider closure systems, i.e., a closure system for slider bags and form, fill and seal technology that contain two tracks that can be interlocked and a separate part (a slider) that rides on the tracks and is used to open and/or close the tracks. The bag-like structure is created when the thermoplastic film is folded, sealed, and severed along its exposed edges.
- Reclosable bags are a great convenience to the consumer. This is especially true where the food product or material contained within the bag is of a type that may not all be consumed at once, for example, shredded cheese, sliced cheese, cheese, processed cheese, deli meats, snack foods, vegetables, fruits, sweets, etc.
- a problem with these types of bags is achieving a design in which the food product is hermetically sealed against oxygen, atmospheric intrusion or transmission, bacteria, molds, and/or other sources of contamination, while also providing features that help to disclose to the consumer evidence of tampering without substantially interfering with the ease of use of the bag.
- HFFS Horizontal Form Fill and Seal
- VFFS Vertical Form Fill and Seal
- HMW Horizontal Flow Wrapper
- Tamper evident packaging may also require the use of several pieces of film, which must then be connected to each other. This can make manufacturing of the reclosable bag more complicated.
- Gusseted style packages are additionally greatly convenient to the consumer. Gusseted style packages allow the package to stand upright due to their wider base. This is true when it is desirable to stand a package upright by itself. Further, the wider base of the gusseted style package enables them to hold a greater volume of product than a conventional four-sided seal package of similar dimensions. The challenge has been to combine the convenience of a zippered packaged in one gusseted, reclosable bag.
- the gusset style package is typically formed with the gusset at the bottom and the zipper at the top. This type of package is filled through the opened zipper.
- the "press to close” zipper it is necessary for the "press to close" zipper to be closed (i.e. the male and female profiles need to be engaged), when the zipper profiles are fused together at the side seal. If the male and female profiles are not engaged, they are subject to misalignment. If they are misaligned at the side seal station, the resulting package will have a zipper that does not close completely, specifically adjacent to the side seal, and a leaky package results.
- the zipper must be opened, by either pulling the sides of the package that the zipper is attached to apart, or by holding the sides securely while a plunger lowers into the upper portion of the package, forcing the zipper open. Regardless of the method chosen, an unacceptable percentage of unopened packages or damaged zippers results.
- a further problem associated with traditional top filling of zippered, gusseted packages occurs when the zipper is closed after the package has been filled with product.
- the usual method forces the zipper closed by applying force to both sides of the zipper and in a direction tangent to the sides of the package. This process may not consistently close the zipper and those that do close may have product pushed into the zipper profiles.
- thermoform type machines like the one disclosed in US Patent No. 4,240,241 could also be used to practice the present invention disclosed herein, after appropriate modification as the disclosure herein will make apparent.
- the bag structures include sidewalls or fin portions that extend up past the sliding type zipper structure. This interferes with the consumer's access to the food, makes it difficult to see the zipper structure, and also makes it more difficult to easily operate the zipper mechanism. This is especially true if the person opening and closing the bag is disabled, has arthritis, or another aliment, which limits the manual dexterity of that person.
- the present invention is believed to address these and other objectives by the unique and simple structures and methods disclosed herein.
- the present invention may generally be described as a reclosable bag for filling with at least one food product.
- the reclosable bag includes at least one sheet of web material.
- the sheet of web material has at least two areas of structural weakness and at least one fold structure located between and defined by the two areas of structural weakness.
- the reclosable bag includes an opening located generally opposite the fold structure.
- the reclosable bag includes a sliding fastener structure having a skirt structure of web material extending therefrom and located within the fold structure.
- the skirt structure or skirt material may be either integral to the slider fastener structure or it may be coupled, e.g., sealed or adhered, to the slider fastener structure.
- the skirt structure includes a distal margin that is coupled to the sheet of web material at a location between the areas of structural weakness and the opening.
- the web material of the reclosable fastener structure extending past the areas of structural weakness so that the reclosable fastener structure is located within the fold structure.
- the reclosable bag is capable of being filled with at least one food product through the opening.
- the reclosable bag structure of the present invention may optionally include other features.
- the skirt may include an outside surface and an inside surface.
- the distal margin is located on the outside surface.
- the inside surface may include a predetermined area having a releasable adhesive material. This allows for the option of having a peelable seal, which may be used to aid in making the reclosable bag initially hermetic and may also add another reclosable/resealable feature to the bag.
- reclosable, resealable, and releasable in addition to their normal meaning, are used herein, interchangeably, to describe a closed or sealed opening that may be re-opened at a predetermined time to aid in providing access to at least a portion of the contents of the bag, and then closed or sealed to allow the remaining contents to be stored in the bag for later use and/or provide evidence of tampering.
- the web material of the reclosable bag is substantially comprised of a predetermined portion of a roll of a parent film material.
- the predetermined portion having predetermined dimensions from which a reclosable bag of predetermined dimensions may be constructed.
- the parent film material may be manufactured to a specification which determines the shape and location of the areas of structural weakness and which makes the areas of structural weakness an integral part of the parent film. Presently, it is believed to be commercially preferred to do so.
- the areas of structural weakness could be applied to the parent film at a predetermined step of the construction or manufacturing process of the resealable bag.
- the areas of structural weakness may extend intermittently, continuously, and linearly, nonlinearly, or in some other predetermined pattern across a predetermined dimension of the sheet of web material.
- the predetermined dimension where the area of structural weakness is located may be either the length or the width of the reclosable bag, which is usually rectangular in shape, depending on whether or not it is desired to use the long edge or side of the bag or the short edge or side of the bag with the slider closure system. Use of the long edge of the bag provides for a larger opening and thus enhances the ease of access to the food material or other materials contained within the reclosable bag.
- structural weakness is generally used to describe that area of the reclosable bag that is intentionally designed to be easily torn by the consumer to provide for evidence of tampering and to allow for easy exposure of the zipper mechanism or assembly. Nonetheless, it should be understood that use of the term structural weakness should include, without limiting its meaning, structures such as perforation, scores, microperforations, and multiple laminate materials which include a layer having an area of material or materials which are specifically designed to be easily torn. Accordingly, it should be understood that the areas of structural weakness are intentionally designed to create a predetermined tear path, which may or may not be hermetic.
- opening of the bag may be facilitated by the application of a tear strip (e.g., tear tape or tear string) along a predetermined surface or surfaces of the parent film.
- a tear strip e.g., tear tape or tear string
- the tear strip may or may not be used in combination with a predetermined area of structural weakness.
- the present invention may be described as a reclosable bag for filling with at least one food product and comprising at least one sheet of a web material.
- the sheet of web material includes a first area of structural weakness and a second area of structural weakness.
- the areas of structural weakness may be tear areas or areas having a propensity to tear in a predetermined direction.
- the sheet of web material including at least one fold structure, located between and defined by the first and second areas of structural weakness, and a fill opening.
- the sheet of web material further comprising a first panel coupled to the fold structure at the first area of structural weakness and a second panel coupled to the fold structure at the second area of structural weakness.
- a reclosable fastener structure including a male track structure and a female track structure.
- the male track structure including a first fin structure of web material extending therefrom and the female track structure including a second fin structure of web material extending therefrom.
- Each fin structure including a predetermined coupling portion.
- the coupling portion of the first fin structure being coupled to the first panel and the coupling portion of the second fin structure being coupled to the second panel.
- the reclosable fastener structure extending past the areas of structural weakness and into the fold structure. The areas of structural weakness being located below the reclosable fastener structure.
- the alternative reclosable bags are also capable of being filled with at least one food product through the fill opening, which is subsequently sealed.
- the present invention allows the fold structure to be easily removed from the reclosable bag. More importantly the present invention allows the consumer to substantially expose the reclosable fastener structure so that it is easily accessible and the consumer does not have to be impeded by bag sidewalls or bag fin portions that extend up past the zipper structure. Finally, the present invention accomplishes this using but not limited to substantially one piece of film material.
- the present invention may be described as a reclosable bag for filling with at least one food product.
- the reclosable bag may include at least one sheet of web material, at least one tear tape structure, at least one fold structure, and an opening located generally opposite the fold structure.
- a reclosable fastener structure including at least one integral skirt structure of skirt web material extending therefrom.
- the integral skirt structure including at least one distal margin. The distal margin being coupled to the web material at, at least one location between the tear tape structure and the opening.
- the reclosable fastener structure extending past the tear tape structure and into the fold structure.
- the reclosable bag capable of being filled with at least one food product.
- the reclosable bag for filling with at least one food product may also be described as a reclosable bag including at least one sheet of web material having at least one fold structure presenting at least two sidewall structures having inside surfaces, and an opening located generally opposite the fold structure.
- a reclosable fastener structure including an integral skirt structure comprising a web material extending therefrom and including opposed distal margin structures. The web material of the integral skirt structure being sealed to the inside surfaces of the sidewall structures at a plurality of predetermined sealing areas.
- the reclosable bag may also include a barrier web material extending between and coupled to the distal margin structures.
- the barrier web material of the alternative bag may alternatively extend between and be coupled to the sidewall structures.
- the barrier web material may also be coupled to predetermined sealing areas by at least one peelable seal.
- the barrier web material may include at least one area of structural weakness that extends through it along a direction generally parallel to the predetermined sealing areas.
- the reclosable bag for filling with at least one food product of the present invention may include at least one sheet of web material having at least one predetermined tear area, at least one fold structure, and an opening located generally opposite the fold structure.
- a reclosable fastener structure including at least one integral skirt structure of skirt web material extending therefrom.
- the integral skirt structure including at least one distal margin. The distal margin being coupled to the web material at, at least one location between the tear area and the opening.
- the reclosable fastener structure extending past the tear area and into the fold structure.
- the reclosable bag capable of being filled with at least one food product.
- This alternative reclosable bag structure may further include at least one piece of a header material located in a predetermined area of the fold structure.
- the header material may include at least one edge structure adjacent the tear area.
- the reclosable bag of this alternative structure may further include at least one tear tape structure coupled to the web material and adjacent to the tear area.
- the present invention may be described as a reclosable bag for filling,with at least one food product.
- the reclosable bag may include at least one sheet of web material, at least one tear tape structure, at least one fold structure, and an opening.
- a reclosable fastener structure including at least one integral skirt structure of skirt web material extending therefrom.
- the integral skirt structure including at least one distal margin. The distal margin being coupled to the web material at, at least one location between the tear tape structure and the opening.
- the reclosable fastener structure extending past the tear tape structure and around and over the fold structure.
- the reclosable bag capable of being filled with at least one food product.
- the reclosable bag for filling with at least one food product may also be described as a reclosable bag including at least one sheet of web material having at least one fold structure, and an opening.
- a reclosable fastener structure including an integral skirt structure comprising a web material extending therefrom and including opposed distal margin structures. The web material of the integral skirt structure being sealed to the outside surfaces of the sidewall structures at a plurality of predetermined sealing areas.
- the inside surface of the reclosable bag may also include a predetermined area having a releasable adhesive material. This allows for the option of having a peelable seal, which may be used to aid in making the bag initially hermetic and may also add another reclosable/resealable feature to the bag.
- the present invention may be described as a method of construction using known form-fill-and-seal machinery including but not limited to HFFS, VFFS, and HFW machines.
- the steps of the method of construction include 1. Folding the sheet of web material along a predetermined folding area located between the areas of structural weakness to form the fold structure. 2. Inserting the reclosable fastener into the fold structure. 3. Coupling the distal margin of the integral skirt structure to the web material. 4. Sealing the web material along at least two predetermined linear areas located generally perpendicular to the fold structure. 5. Filling the reclosable bag with at least one food product through an opening. 6. Sealing the opening. Please note that in an HFW application it is presently believed that the step four should occur last.
- the method may also include a step of inserting either a tear tape or a tear string at least prior to step four. Further, a header strip could also be introduced prior to step four.
- the web material may be slit along the fold line and the reclosable fastener assembly inserted and sealed to result in an exposed zipper structure assembly at one end of the bag.
- the reclosable bag is designed to have a gusset opposite the zipper opening then the fill opening may be sealed and the bag may be filled with product through the zipper opening.
- the present invention may generally be described as a gusseted, reclosable bag for filling with at least one food product.
- the gusseted, reclosable bag includes at least one sheet of web material.
- the sheet of web material has at least two areas of structural weakness, a gusseted portion, at least one fold structure and an opening located generally between the fold structure and the gusseted portion.
- the reclosable bag includes a sliding fastener structure having a skirt structure of web material extending therefrom.
- the skirt structure or skirt material may be either integral to the slider fastener structure or it may be coupled, e.g., sealed or adhered, to the slider fastener structure.
- the skirt structure includes a distal margin that is coupled to the sheet of web material at a location between the fold and the opening.
- the reclosable bag is capable of being filled with at least one food product through a fill opening located between the skirt structure and the gusseted portion.
- a backing or barrier strip structure is inserted between and extending below the zipper skirts along the side fill opening.
- the backing or barrier strip structure may be made out of any suitable material but is preferably two-ply and composed of a laminate film such as Curwood's 7182 barrier film.
- One side of the barrier strip structure to be used in the present invention is nylon, or any other suitable material such as polypropylene, which will not bond to the parent film.
- the opposite side of the barrier strip structure may be provided with a sealant such as polyethylene, polyethylene blend, or a polyethylene co-extrusion. The sealant side is sealed or tacked to the inside surface of the top (or front side) zipper skirt prior to insertion into an upper fold (i.e. fold structure).
- each zipper skirt is sealed to the parent film.
- the parent film then passes over folding boards to form a bottom gusset.
- the remaining unsealed edge of parent film extends upward to meet the other edge located at zipper skirt.
- the final sealing bar seals the parent film to the zipper skirt and a portion of the barrier strip structure to make a hermetic package.
- the gusseted, reclosable bag structure of the present invention may optionally include other features.
- the skirt may include an outside surface and an inside surface.
- the distal margin is located on the outside surface.
- the inside surface may include a predetermined area having a releasable adhesive material. This allows for the option of having a peelable seal, which may be used to aid in making the reclosable bag initially hermetic and may also add another reclosable/resealable feature to the bag.
- the reclosable bag may be filled with product through a fill opening located between the zipper skirt and the gusseted portion.
- the present invention may be described as a gusseted, reclosable bag for side filling with at least one food product and comprising at least one sheet of a web material.
- the sheet of web material includes a first area of structural weakness and a second area of structural weakness.
- the areas of structural weakness may be tear areas or areas having a propensity to tear in a predetermined direction.
- the sheet of web material including at least one fold structure, located between and defined by the first and second areas of structural weakness, a fill opening, a backing or barrier strip structure, and a gusseted portion.
- a reclosable fastener structure including a male track structure and a female track structure.
- the male track structure including a first fin or skirt structure of web material extending therefrom and the female track structure including a second fin or skirt structure of web material extending therefrom.
- Each fin structure including a predetermined coupling portion.
- the reclosable fastener structure extending past the areas of structural weakness and into the fold structure. The areas of structural weakness being located below the reclosable fastener structure.
- the backing or barrier strip structure is inserted between and extending below the fin or skirt structures along the side fill opening.
- one side of the barrier strip structure to be used is nylon, or any other suitable material such as polypropylene, which will not bond to the parent film.
- the opposite side of the barrier strip structure may be provided with a sealant such as polyethylene, polyethylene blend, or a polyethylene co-extrusion.
- the sealant side of the backing or barrier strip of this alternative embodiment may be sealed or tacked to the inside surface of the top (or front side) zipper skirt prior to insertion into an upper fold (i.e. fold structure).
- each zipper skirt is sealed to the parent film, as discussed with regard to the reclosable gusseted bag with sliding fastener structure.
- an anti-seal agent may be brush applied to the inside surface of the zipper skirt prior to insertion into an upper fold.
- the present invention may be described as a gusseted, reclosable bag for side filling with at least one food product.
- the reclosable bag may include at least one sheet of web material, at least one fold structure, at least one gusset structure, a side fill opening having a backing or barrier strip structure, located generally between the fold structure and the gusset structure.
- a reclosable fastener structure including at least one integral skirt structure of skirt web material extending therefrom.
- the integral skirt structure including at least one distal margin. The distal margin being coupled to the web material at, at least one location between the fold structure and the opening.
- the reclosable bag capable of being filled with at least one food product.
- This alternative reclosable bag structure may further include at least one piece of a header material located in a predetermined area of the fold structure.
- the header material may include at least one edge structure adjacent the tear area.
- the present invention may be described as a method of construction using known form-fill-and-seal machinery including but not limited to HFFS, VFFS, and HFW machines.
- the steps of the method of construction include 1. Placing a backing or barrier strip structure in registration with the side seal. 2. Punching out the strip in the area that is both in the side seal and adjacent to the skirt of the zipper to which the backing or barrier strip will be attached. 3. Attaching the backing or barrier strip to the inside face of one of the skirts of a zipper track with sealant side of the strip facing the inside surface of the skirt. 4. Heat sealing a portion of the remaining strip adjacent the zipper skirt to the zipper skirt. 5. Folding the sheet of web material along a predetermined folding area located between areas of structural weakness to form a fold structure. 6.
- the method may also include a step of introducing a header strip prior to step ten.
- the process and structure of the present invention could include a reclosable fastener assembly having two skirts or flaps of web material.
- the first skirt could be coupled or sealed to the parent film prior to folding the parent film.
- the first skirt could be tack or partially sealed prior to folding and then subsequently a full seal applied in the HFFS, VFFS, or HFW machine.
- the second skirt or flap After folding the parent film the second skirt or flap would be sealed to the film sidewall located opposite the sidewall to which the first skirt is sealed or coupled. Construction of the bag could then be completed as disclosed herein.
- the present invention is both a method and a structure resulting from the method.
- the present invention generally relates to reclosable plastic bags 100 and, more particularly, to a reclosable plastic bags 100 having a slider or zipper assembly 20, which cooperates with a tamper-evident feature.
- the tamper-evident feature may also be a hermetic seal feature.
- the method of the present invention while unique and fully described herein, may be used on known machinery such as, by way of illustration and not by way of limitation, the rpm 100 packaging machine manufactured by Klockner Packaging Machinery of Sarasota, Florida, U.S.A. The modifications necessary to the machinery used to practice the present invention will be apparent to a person of ordinary skill in the art after reading this disclosure.
- the zipper assembly 20 typically includes a zipper structure 20a and an integral skirt 16.
- the skirt 16 is bonded to the parent film 10 at a predetermined seal location 14. See Figure 3 .
- FIG. 1 a predetermined portion of the parent film 10 is illustrated.
- the parent film 10, at predetermined locations, is structurally weakened, e.g., by the use of presently known laser scoring technology.
- an elevational edge view of the parent film 10 including the score lines 12 may be seen.
- the weakened area 12 may also be imperforate and hermetic.
- the weakened areas 12 define an integral tear off portion or fold structure 11.
- the film 10 is folded over, as shown, to form the fold structure 11 and a zipper assembly 20 is inserted.
- Weakened areas 12 are positioned below the zipper structure 20a so that when fold structure or hood 11 is removed the zipper structure 20a is exposed sufficiently above the resulting fin structures 19 to allow the user access to the zipper structure 20a.
- Zipper skirts 16 are shown bonded to the film 10.
- the uncut ends 23 (see Figure 5 ) of each zipper assembly 20 be punched out or cut to form a radiused notch 22a, as shown in Figure 7 .
- the cut zipper assembly ends 22 are sealed together (the sealed mass 22b of Figure 7 ) which will later function to retain the contents of the bag 100 such as food.
- skirt(s) 16 remain intact so that the zipper assembly 20 is kept continuous for ease of handling. Once inserted the skirt(s) 16 of the zipper assembly 20 is bonded to the inside surface 10a of the parent film 10 at seal location(s) 14.
- Next sides 30 and 32 are sealed, along margin 10c illustrated in Figures 5 or 7 , using a known mechanism such as a heat-sealing bar of a form fill and seal machine by advancing the folded film 10 to the heat sealing bar portion of the machine used; creating a seal 30a across the length and width of margin 10c.
- the resulting bag 100 is then filled with a predetermined foodstuff or other desired material through the opening 33 located, opposite the zipper assembly 20, at bottom edge 34 shown in Figure 5 or 7 . Then bottom edge 34 is subsequently sealed, forming seal 34a.
- Tear off portion 11 is integral to the parent film 10. Integral tear off portion 11 may be easily removed by tearing along the score lines 12, leaving the zipper structure 20a fully exposed and easily accessible for the use desired.
- the above noted process and mechanism may also be performed so that the zipper assembly 20 is located along one of the long sides 30 or 32 of the bag 100 rather than the short side of the rectangle, which is defined by the bag 100.
- FIG. 5 a second embodiment of the present invention 1 is illustrated.
- two bags 100 are shown prior to their being separated along seam 101.
- This embodiment includes score lines 12 laid out in an alternative pattern that includes curve or arcuate section 13 and tear notch 24.
- the parent film 10 is sealed at section 26 to either its opposing sides 35 and 36 or the structure of the zipper assembly 20.
- the tear notch 24 provides a starting point for removing the fold structure 11, which is located above the zipper assembly 20.
- the fold structure 11 being defined by the location of the score lines 12.
- the score lines 12 extending along curve 13 to a predetermined area below the zipper assembly 20 for substantially the entire width of the reclosable bag 100 facilitating removal of the hood or fold structure 11 and exposure of the zipper structure 20a.
- the embodiment of Figure 5 further including a hermetic seal 40.
- the integral skirt 16 usually comprised of two strips on pieces of plastic film or a one-piece unit of continuous film, may be seen to have its outside surface 19 sealed hermetically to the inside surfaces 36a and 35a at respective hermetic seals 40a and 40.
- a peelable seal 50 is located at the bottom of the skirt 16. Any standard commercially known resealable adhesive 51 may be used to make the peel seal 50.
- the peel seal 50 may also be a hermetic seal 40b.
- the zipper skirt 16 is heat sealed to the side panels 36 and 35 respectively of the parent film 10.
- the inside surfaces 17 of the zipper skirt 16 are peelable sealed to one another, using a known releasable adhesive 51, to provide a releasable hermetic or gas tight seal 50 therebetween.
- resealable adhesive or releasable adhesive should be construed interchangeably as well as given their common meaning.
- FIG. 10 another alternative embodiment of Figure 8 is shown.
- the parent film 10 is sealed along a predetermined portion 42 of inside surface 35a and 36a.
- a known releasable adhesive 51 is used to form a peelable seal 50 between inside surfaces 35a and 36a at predetermined portion 42.
- US Patent No. 4,944,409 contains an example of such an adhesive.
- CUREX brand grade 4482-0 supplied by Curwood of Oshkosh, Wisconsin is considered an acceptable adhesive for use with this embodiment of the present invention.
- peelable seal 50 is comprised of a peel seal tape 53 having a permanent sealant like a metallocene catalyzed polyethylene located on one side and a releasable seal material like the aforesaid CUREX brand material on the other side (side 54).
- FIG. 11 and 12 One possible method for achieving the structure of Figure 11 and 12 is the use of a form fill and seal machine system in which the peel seal tape 53 would be tacked onto a predetermined location of the parent film 10 prior to the plow 200.
- FIGs 31 , 33 , and 34 See Figures 31 , 33 , and 34 for a general illustration of the location of the plow 200 in relationship to the other components of a form fill and seal machine.
- heat sealer bar 208 it is presently believed preferable for heat sealer bar 208 to be enlarged sufficiently so that in addition to sealing the tear tape 120 is place it also seals the permanent seal side of the peal seal tape 53 in place at the same time.
- sealer bar 208 is believed preferable for these separate functions multiple bars could be used, each having a dedicated function or a combination of functions).
- the peelable sealant side 54 would be sealed to the parent film 10 by heat sealer bars 55.
- Use of sealer bars 208 and 55 as disclosed herein allows independent temperatures and pressures to be used for each seal and it is believed that more consistent peel seals will result.
- the zipper skirt 16 may be sealed in place subsequent to the plow 200 by sealer bar 56 and the header seal 206a may be made by sealer bar 57 as illustrated generally in Figures 34 and 36 .
- the zipper skirt 16 includes an elongated section 16a. End 21 of elongated section 16a is positioned between the inside surfaces 36a and 35a of the side panels 36 and 35 of the parent film 10. The elongated section 16a is heat sealed to the parent film 10 on inside surface 35a and peelable sealed using a known releasable adhesive 51 to inside surface 36a to form peel seal 50.
- FIG. 14 a third embodiment of the present invention is disclosed. Again, two bags 100 are shown prior to their being separated along seam 101.
- the invention of the third embodiment is comprised of parent film 10, which is used to form the bag 100 that is to be filled.
- the bag 100 includes a first side seal 30, a second side seal 32, and a fill opening 33.
- Side panel 35 forms the front side of the bag 100.
- the fill opening 33 after the bag 100 is formed and filled with a predetermined type of food material, is heat sealed to form bottom edge or seal 34.
- the bag 100 further includes a fold structure 11, header 15, integral zipper skirt 16, a zipper assembly 20 including a zipper structure 20a, at least one hermetic seal 40, an unsealed area 60, and a section 62 where the zipper skirt 16 and the ends 23 of the zipper assembly 20 are heat sealed together (see sealed mass 23b in Figure 14 ) prior to their insertion between the front side 35 and the back side 36 of the film 10.
- the formation of sealed mass 23b may take place at sealer 216, which is illustrated in Figure 30 .
- the zipper skirts 16 may have a predetermined portion or portions that extend past seal 40 and which may be held together with a peel seal 50. See for example, Figure 15 .
- the hood structure 11 (which may be defined by the score lines 12) may be easily removed to expose zipper structure 20a.
- the sealed mass 23b provides for containment of product when the peelable seal 50 is opened.
- FIG. 15 a view from line 15--15 of Figure 14 may be seen. This may be seen to be identical to the embodiment of Figure 8 , except as explained above with reference to Figure 14 .
- the zipper skirt 16 is made of one piece of material. It is heat sealed to the inside surfaces 35a and 36a to form hermetic seals 40 and 40a.
- the skirt 16 is provided with a structural weakness 45 which extends linearly and generally parallel to hermetic seals 40 and 40a along the zipper skirt 16.
- the structural weakness 45 is designed to fracture or tear relatively easily when the customer opens the bag 100.
- the zipper skirt 16 includes a barrier film section 16b.
- the barrier film 16b is applied (preferably by heat sealing although other methods could be used, e.g., Adhesive coupling, ultrasonic or high frequency sealing technology) to the inside surface 16d of the zipper skirt 16.
- the zipper skirt 16 is heat sealed along a predetermined portion of its outside surface 16e to parent film 10 to form a hermetic seal 40.
- the barrier film section 16b is releasably sealed to the inside surface 16d to form at least one peel type seal 50. Note that it is presently believed that section 16b must have a surface 16c that is resistant to heat sealing.
- barrier film section 16b is heat sealed to a separate predetermined portion of the inside surfaces 35a and 36a of the parent film 10.
- the barrier film 16b is provided with a structural weakness at 45 which extends linearly and generally parallel to hermetic seals 40. The structural weakness is designed to fracture or tear relatively easily when the customer opens the bag 100.
- Figure 17 could be provided with a structural weakness 45 as described with reference to Figure 18 .
- peel seal 50 would be replaced with a permanent seal.
- header strip 206 located between the front side 35 and back side 36 of the parent film material 10, of a predetermined size have sufficient width to extend down to, preferably just above, a tear line 132 (area of structural weakness).
- the header strip 206 terminates at edge(s) 131.
- This tear line 132 has the predetermined propensity to tear in predetermined way.
- the extension of the header strip material 206 extends down so that it is adjacent to the tear line 132. This facilitates tearing off the hood structure 11 from the bag 100 along the tear line 132.
- the optional tear notch 134 facilitates initiation of the tear
- the tear line 132 (the oriented parent film 10 or film 10 with the propensity to tear) directs the tear
- the header material 206 which is bonded or sealed to the front side 35 and back side 36 of the parent film 10, controls the tear so that the zipper structure 20a is consistently clear of the parent film material 10 after the removal of the hood structure 11.
- the header material 206 is made of an oriented polypropylene having at least one side with a heat sealable sealant then the parent film 10 would not need to be oriented or have the tear line 132 or propensity to tear.
- the header material 206 is made of an oriented polypropylene then the oriented polypropylene should have both its sides coated with a heat sealable sealant.
- a plurality of header strips 206 could be used instead of a single integral header strip 206. In either case, the parent film 10 would not necessarily need to be oriented or have a tear line 132 or a propensity to tear.
- At least one but preferably two pieces of tear tape 120, located between the front side 35 and back side 36 of the parent film material 10 on film surfaces 35a and 36a, of a predetermined size are bonded or sealed to the parent film 10 of the hood structure 11 adjacent, preferably just above, a tear line 132 (area of structural weakness).
- This tear line 132 has the predetermined propensity to tear in predetermined way.
- the tear tape material 120 adjacent the tear line 132 facilitates tearing off the hood structure 11 from the bag 100 along the tear line 132 in a controlled manner.
- the optional tear notch 134 facilitates initiation of the tear
- the tear line 132 (the oriented parent film or film with the propensity to tear) directs the tear
- the tear tape 120 which is bonded or sealed to the front side 35 and back side 36 of the parent film 10, controls the tear so that the zipper structure 20a is consistently clear of the parent film material 10 after the removal of the hood structure 11.
- the tear tape material 120 is made of an oriented polypropylene having at least one side with a heat sealable sealant then the parent film 10 would not necessarily need to be oriented or have the tear line 132 or propensity to tear.
- the parent film 10 may be weakened in predetermined areas using other procedures as well, including but not limited to scoring or the use of multiply laminate film having a predetermined weakened area or the addition of a tear assistance structure, e.g., Tear tape 120 or tear string 120a.
- the tear assistance structure may be added for use by itself or in conjunction with a predetermined area of structural weakness 12 to aid in the tearing of the film 10. See Figures 28 and 29 .
- tear tape 120 is applied to both the inside surfaces 36a and 35a and the outside surfaces 36 and 35 of the bag 100.
- no score line or weakening 132 is believed necessary (although such an area of structural weakness could be used) since the tear tape 120 located on both the inside and outside surfaces of the bag 100 will act as an effective tear guide.
- FIG. 24 another alternative to the embodiment shown in Figure 22 is illustrated.
- a modified tear tape 120b having a tear bead 120c is used.
- FIGS 24-26 illustrate, when the film 10 is sealed to the tear tape 120b the bead 120c is depressed into the film 10 creating an area of structural weakness 12 without requiring pre-scoring or other modification of the parent film 10 prior to the application of the tear tape 120b.
- This structure is believed beneficial because the tear tape 120b is always in alignment with the area of structural weakness 12.
- tear tape 120 is applied to both the inside surfaces 36a and 35a and the outside surfaces 36 and 35 of the bag 100.
- the tear tape 120 is applied to border both sides of the score line or weakening 132. Since the tear tape 120 is located on both sides of the score line 132 and on the inside and outside surfaces of the bag 100 a very consistent controlled or guided will be achieved.
- Tear tape 120 is interchangeable with tear string 120a. Accordingly, a tear string 120a could be substituted for the tear tape 120. See, e.g., Figures 38 and 39 .
- the tear tape 120 or the tear string 120a used is made from a material, e.g., Thermoplastic material, that is compatible with the film 10 and which may be sealed, coupled, or bonded to the film 10.
- the tear tape 120 or tear string 120a may be formed of polyethylene or may be encased in polyethylene. It is understood in the art that a tear string, such as tear string 120a, may have various cross-sectional shapes, e.g., Round, square, triangular, etc., which may be used to enhance its ability to tear the parent film material 10.
- the process by which the alternative embodiment having tear tape 120 is presently believed to be manufacturable is illustrated using an rpm 100 machine.
- the parent film 10 is fed over a predetermined number of rollers and toward the plow structure 200.
- the parent film 10 after passing over dancer roller 203a is die punched by die 210 to present parallel openings 121. It is presently believed that the film 10 must pass over the dancer rollers 203a so that they are kept sufficiently taut thus allowing openings 121 to be punched out accurately at predetermined positions, by die 210, such that the positions of the openings 121 are always at the same or a uniform distance from each other.
- Tear string 120a could be substituted for tear tape 120. See, e.g., Figures 38 and 39 .
- a header material 206 may be fed over the parent film 10.
- the zipper or slider assembly 20 is also fed over the parent film 10. Prior to being fed over the parent film 10 the zipper assembly 20 has a notch 22a die punched, by die 214 and heat sealed by sealer 216, at a predetermined position that is also designed to be in general alignment with the parallel openings 121.
- the tear tape 120 is presented over the parent film 10 but before it is passed over the plow 200 it passes over a tear tape sealer mechanism 208 so that the tear tape 120 is sealed to the parent film 10.
- the tear tape 120 could be tacked in place and subsequently sealed to the parent film 10 either before or after the plow 200.
- the parallel openings 121 may be of any shape although circular is the shape that is presently preferred. Diamond shaped cuts could be used to further enhance initiation of the tear in the parent film 10. See Figure 37 .
- the notch 22a as generally illustrated herein may be of an arcuate or radiused shape but the notch 22a could also be made at a sharp angle such as a 90° angle. See Figure 37 .
- the sharper angle is presently believed to add more stress to the structure of the zipper assembly 20 and therefore a radiused structure is presently considered to be preferred.
- the present invention should not be interpreted as being limited to solely a radiused notch 22a as generally illustrated herein.
- the zipper skirts 16 are sealed to the respective sides of the parent film 10 at seal 14.
- the header strip 206 if used, is sealed to the parent film 10 at seal 206a.
- the side seal 30a is made, which also seals the perimeter or edge 121a of opening 121. (note, if no tear tape 120 or tear string 120a is used then it is presently considered best to add a tear notch 24 to the opening 121 to facilitate removal of the hood 11.)
- An opening 123 is die punched in the package 100 to provide a point where the package 100 may be easily hung for display purposes.
- the package 100 is then cut along seam 101 from the V-fold portion of the form fill and seal machine and transferred to the fill and seal stations where fill opening 33 is opened and the package 100 is filled and gas is flushed through the fill opening 33. Opening 33 is then hermetically sealed at seal 34a.
- the zipper assembly 20 may be introduced subsequent to the plow structure 200.
- the parent film 10, prior to being fed over the rollers 202 is still die punched by die 210 to present parallel openings 121.
- the tear tape 120 or tear string 120a may be feed over the parent film 10 and in parallel alignment with the parallel openings 121 subsequent to the plow 200. See Figures 38 and 39 .
- the tear tape 120 or tear string 120a preferably, but not necessarily, bisects each parallel opening 121.
- Figure 39 shows both the tear string 120a and skirts 16 of the zipper assembly 20 being introduced to the parent film 10 subsequent to the plow 200 and respectively sealed by sealer bars 208 and 209
- tear string 120a or the zipper assembly 20 could be introduced before the plow 200.
- the zipper assembly 20 could be introduced after the plow 200 and the tear string 120a prior to the plow 200.
- tear tape 120 is interchangeable with the tear string 120a it will be apparent to a person of ordinary skill in the art reading this disclosure that the tear tape 120 could also be introduced after the plow 200 and used in essentially the same manner as the tear string 120a.
- the openings 121 are provided, at a minimum, to facilitate access to the tear tape 120 or the tear string 120a and to facilitate tearing and removal of the hood 11 to expose the zipper assembly 20.
- the present invention may be used in combination with other VFFS and HFFS machines.
- the present invention could also be used with HFW machines.
- the method of the present invention is presently believed to require post-compression (commonly called post-squashing) of a predetermined portion of the track structures 20b, with respect to the embodiment shown in Figure 6 .
- post-squashing commonly called post-squashing
- the track mass 20b may have a precompressed portion located with margin 10b.
- HFW machines In applications using HFW machines for the manufacture of the embodiment shown in Figure 5 , such as Jones Automation Company machines, it is not believed necessary to pre-compress, post-compress, or squash a predetermined portion of the track mass 20b.
- HFW machines have a rotary jaw assembly, which includes a hinged side.
- the jaw assembly provides at least two advantages, either of which, separately or in combination, eliminates the need for pre-compression of the track mass 20b.
- the jaw assembly provides a relatively long time, longer than the time provided by either VFFS or HFFS machines, for the application of heat and pressure sufficient to form the desired seal 30a.
- the portion of the track mass 20b that is targeted to be fused or sealed (generally located within the boundary of margin 10b) is placed or fed into the jaw assembly so that it is placed toward and near the hinged portion of the jaw assembly and thus maximum mechanical advantage and force may be applied to the predetermined portion of the track mass 20b.
- the track mass 20b may be pre-punched with a die at the predetermined location 22a (where the seal 30a is also to be applied or created) prior to insertion into the fold 11 of the parent film 10. Since the pre-punched area or notch 22a would be synchronized to be in registration with the portion of the folded parent film 10 that is to be sealed, less energy (time, temperature, and/or pressure), due to the reduced mass to be sealed is required to consistently obtain the type of seal 30a desired. (note, pre-punching rather than pre-compression could also be used with HFFS or VFFS machines.)
- FIGS 40 , 40a , 41 and 41a an alternative, not according to the invention, may be seen.
- the film 10 is folded over, as shown, to form the fold structure 11, and a zipper assembly 20 is positioned over the fold structure 11.
- Weakened areas 12 are preferably positioned below the zipper structure 20a, so that when the zipper structure 20a is in the open position the fold structure 11 and its weakened areas 12 are exposed to allow the user access to the fold structure 11.
- the overlaying zipper skirt 16, of the alternate embodiment may be viewed.
- Zipper skirt 16 is usually comprised of two strips of pieces of plastic film or a one-piece unit of continuous film, and is seen to have its inside surfaces 17 sealed hermetically to the outside surfaces 35b, 36b of the film 10 at respective hermetic seals 40c, 40d.
- the fold structure 11 is preferably designed to act as an imperforate hermetic barrier to protect the contents of bag 100. Tearing the fold structure 11 allows the user access to the contents and also provides visual evidence that the hermetic seal is broken.
- the inside surfaces 35a, 36a of the parent film 10 may also be peelably sealed to one another, using a known releasable adhesive 51, to provide a releasable hermetic or gas tight seal 50 therebetween.
- the seal 50 is located adjacent, perferably just below, the weakened areas 12.
- two bags 100 are shown prior to their being separated along seam 101.
- the alternate embodiment seen in these views is comprised of parent film 10, which is used to form the bag 100 to be filled.
- the bag 100 further includes a header 15, and a peg hole 15a, seen in this embodiment at the end opposite the fold 11. It is presently believed preferable, after the folding and sealing of parent film 10 that the parent film 10 be punched out to form a tear area 24a. The parent film is then sealed around the perimeter of the punched out tear area 24a and a tear notch 24 is added, as seen in Figure 40 . These steps are preferably performed before the attachment of the zipper assembly 20 and zipper skirt(s) 16.
- the zipper assembly 20 is positioned and bonded to the outside surfaces 35b, 36b, of the parent film 10, and over the fold 11.
- the parent film 10 may be sealed around the perimeter to include the sealed perimeter of the punched out tear area 24a so that after the punching step which forms tear area 24a, the sealed perimeter remains.
- the tear notch 24 provides a starting point for removing the fold structure 11, which is surrounded by the zipper assembly 20 and attached zipper skirt 16.
- at least one piece of tear tape 120 located between the front side 35 and back side 36 of the parent film 10 on film surfaces 35a, 36a, of a predetermined size may be bonded or sealed to the parent film 10 at the fold 11.
- the tear tape 120 is located adjacent, preferably just above, a tear line 132 (area of structural weakness).
- This tear line 132 has the predetermined propensity to tear in a predetermined way.
- the tear tape material 120 adjacent the tear line 132 facilitates tearing off the fold structure 11 from the bag 100.
- the aforementioned tear notch 24 facilitated initiation of the tear.
- skirt(s) 16 remain intact so that the zipper assembly 20 is kept continuous for ease of handling.
- the skirt(s) 16 of the zipper assembly 20 is bonded to the outside surfaces 35b,36b of the parent film 10 at seal location(s) 40c, 40d.
- sides 30 and 32 are sealed, along margin 10c illustrated in Figure 40 , using a known mechanism such as a heatsealing bar of a form fill and seal machine (as described earlier in the present application) by advancing the film 10 to the heat sealing bar portion of the machine to be used.
- reclosable bag 100' including a gusseted portion 310 and side fill opening 300 is shown.
- the gusseted, reclosable bag 100' includes at least one sheet of web material 10 having at least two areas of structural weakness 12.
- the areas of structural weakness 12 may be micro perforations, scoring or any other structural weakness that will allow facile tearing of the web material 10.
- the weakened areas 12 define an integral tear off portion or fold structure 11.
- the gusseted, reclosable bag 100' is further defined by a gusseted portion 310 and a sealable fill opening 300.
- the sealable fill opening 300 is located generally between the fold structure 11 and gusseted portion 310.
- a backing or barrier strip 320 is inserted between the zipper skirts 16.
- the backing or barrier strip 320 is preferably two-ply material and may be composed of laminent film such as Curwood's 7182 barrier film.
- a first or inner side 328 may be composed of Nylon, polypropylene, or any other suitable material that will not bond to the parent film 10 during sealing.
- a second or outer side 329 of the strip 320 may be provided with a sealant, such as a polyethylene, polyethylene blend, or a polyethylene co-extrusion.
- the backing or barrier strip 320 is preferably notched at 326 and 326a (best seen in Figure 47 ) to allow proper sealing of side seal 30a.
- a zipper assembly 20 having attached zipper skirts 16 is inserted in the fold structure 11.
- the inner resistant side 328 of strip 320 prevents the skirt(s) 16 from sealing together along their respective inner surface 17, seen particularly in Figure 45 .
- the skirts 16 are bonded at 14 to the inside surface of the parent film 10.
- FIG. 42 two bags 100' are shown prior to their being separated along seam 101.
- This embodiment includes score lines 12 laid out in a pattern that includes a tear notch 24.
- the tear notch 24 provides a starting point for removing the fold structure 11, which is located above the zipper assembly 20.
- the parent film 10 is sealed at section 26 to either its opposing sides 35 and 36 or the structure of the zipper assembly 20.
- seal 30a extends across notches 326, 326a in strip 320 and area 26a refers to the general area of the hermetic side seal 30a adjacent the notches 326, 326a.
- the fold structure being defined by the location of the score lines 12.
- the score lines 12 extend below the zipper assembly 20 for substantially the entire width of the reclosable gusseted bag 100', facilitating removal of the fold structure 11 and exposure of the zipper structure 20a.
- the embodiment of Figure 42 further includes a sealable fill opening 300 located below the zipper assembly and above the bottom gusset 310.
- FIG. 43 and 44 a cross-sectional view of the embodiment of Figure 42 may be seen.
- the backing or barrier strip 320 is seen with an upper portion 324 thereof attached to the inside surface 17 of the zipper skirt 16.
- a lower portion 322 of the barrier strip 320 is attached to the inside surface 32a of the bag 100' at a point just below the fill opening 300.
- the lower portion 322 is seen prior to attachment to inside surface 32a, with the fill opening 300 in the open position.
- opening 300 is shown in the closed position the web edges 400 are seen as not completely abutting. It is to be understood that while it is preferred that the edges 400 abut, it is within the scope of the present invention to include a closed opening 300 wherein the web edges 400 are not completely abutted.
- the film 10 is folded over, as shown to form the fold structure 11 and a zipper assembly 20 is inserted.
- Weakened areas 12 are preferably positioned below the zipper structure 20a so that when the fold structure 11 is removed, the zipper structure 20a is exposed sufficiently above the resulting fin structures 19 to allow the user access to the zipper structure 20a.
- Zipper skirts 16 are shown bonded to the film 10. However, it is presently believed preferable, prior to insertion of the zipper assembly 20, that the uncut ends (not seen in these views) of each zipper assembly 20 be punched out or cut to form a radiused notch 22a, as shown in Figure 42 .
- an upper portion 324 of a backing or barrier strip 320 is attached to the inside surface 17 of one of the zipper skirts 16.
- a lower portion 322 of the strip 320 extends beyond the distal margin 342 of the zipper skirt 16 and is bonded to the inside surface 36a of side 36. It is presently believed preferable, prior to attachment to the zipper skirt 16, that the backing or barrier strip 320 be punched out or cut to form notch 326 (seen in Figure 47 ).
- barrier strip 320 is further punched prior to insertion into fold structure 11, to form notch 326a, also in register with side seal 30a.
- Notches 326 and 326a are positioned to be in register with radiused notch 22a of zipper assembly 20, all of which are positioned to be in register with side seal 30a, seen in Figures 42 and 48 .
- Consecutive notches 326, 326a in barrier strip 320 alleviate the presence of barrier strip 320 at side seal 30a, thus facilitating a hermetic seal at area 26a (best seen in Figure 42 ).
- the hermetic seal is obtained by sealing inside opposing surfaces 35a, 36a at 26a and 30a.
- the inside surface 10a of parent film 10 is simultaneously sealed to the zipper skirts 16 at area 14, as seen in Figure 45 , and simultaneously, inside surfaces 17 of skirts 16 ( Figure 45 ) are sealed to each other in the notched out areas 326 and 326a at 26a, where the barrier strip is not present (seen best in Figure 42 ).
- skirt(s) 16 remain intact so that the zipper assembly 20 is kept continuous for ease of handling. Once inserted, the skirt(s) of the zipper assembly 20 is bonded to the inside surface 10a of the parent film 10 at seal location(s) 14.
- FIG. 46 , 47 , and 48 the process by which the alternative embodiment gusseted, side fill bag 100' (seen in Figures 42 - 45 ) is presently believed to be manufacturable is illustrated using an rpm 100 machine.
- the parent film 10 is fed over a predetermined number of rollers and toward the trapezoidal plow structure 200a.
- the zipper assembly 20 and backing strip 320 are fed over the parent film 10.
- the zipper assembly 20 and backing strip 320 must pass over the dancer rollers 203a so that they are kept sufficiently taut thus allowing notches 22a, 326, and 326a to be punched out accurately at predetermined positions such that the notches 22a and 326 will be in register with each other when the backing strip 320 is inserted between zipper skirts 16.
- the zipper assembly 20 Prior to being fed over the parent film 10, the zipper assembly 20 has a notch 22a die punched, by die 214' and heat sealed by sealer 216', at a predetermined position at seal 22b that is also designed to be in general alignment with the notch 326 in strip 320, formed by die 214'' and 326a formed by die 214'.
- notch 326 is preferably formed such that the distal margin 342 of skirt 16 extends into the notch 326. This configuration allows notch 326a to be formed by die 214' with minimal chance of skirt 16 being inadvertently notched by die 214'. Die 214' simultaneously forms notches 326a and 22a.
- the parent film 10 is folded over the zipper assembly 20 to form the fold structure 11. Before the parent film 10 is passed over the trapezoidal plow 200a it passes over a zipper sealer mechanism 216 whereby the zipper skirts 16 are sealed to the parent film 10 at the inside surfaces 35a, 36a of opposing sides 35, 36 respectively.
- gusset holes 344 are die punched by die 344a at a predetermined position designed to be in general alignment with side seal 30a.
- the gusset holes 344 allow gusset folds to be attached to each other at side seal 30a thereby adding rigidity to the gusset portion 310 of the gusseted bag 100'. This added rigidity enables the gusseted bag 100' to stand up by itself when placed on a flat surface such as a table or refrigerator shelf (not seen in these views).
- additional seals 470 may be included for additional rigidity and containment as would be desired with liquid products.
- a header material 206 may be fed over the parent film 10.
- the header strip 206 if used, is sealed to the parent film 10 at seal 206a, seen particularly in Figure 47 .
- seal 206a is formed by heat sealer 216.
- Heat sealer 216 simultaneously seals the zipper skirt(a) 16 to the parent film 10 at 14.
- the parent film 10, attached zipper assembly20, and strip 320 are passed over roller 350.
- the remaining manufacturing process is carried out as generally illustrated in Figure 48 .
- the parent film 10 and attached zipper assembly 20 passes over a trapezoidal folding board or plow 200a.
- the folding step leaves a flat bottom prior to the parent film 10 being passed over a tucking board 334.
- the tucking board 334 reverse folds the previously formed flat bottom of the parent film 10 into a gusset 310.
- the side seal 30a is made.
- the barrier strip 320 preferably marginally enters the area of side seal 30a at seal area 26a. Notches 326 and 326a preferably remove a majority of the barrier strip 320 in the seal 30a area to provide hermetic seal 30a.
- the barrier strip 320 minimally enter the side seal 30a area at seal area 26a, it is within the province of the present invention to provide a barrier strip 320 which ends before, at, or beyond the side seal 30a area.
- the present invention may be practiced using a barrier strip 320 having longitudinally-spaced sealable areas whereby the notches 326 and 326a are not necessary and the sealable areas are arranged to be in alignment with the seal area 30a. Tear notch 24 is added to facilitate removal of the fold 11.
- An opening 123 is die punched in the package 100' to provide a point where the package 100' may be easily hung for display purposes.
- the package 100' is then cut along seam 101 from the bag making portion of the form fill and seal machine and transferred to the fill and seal stations where the side fill opening 300 is opened and the package 100' is filled through side fill opening 300.
- the opening 300 seen in Figure 48 , is then hermetically sealed at seal 340, as seen in Figure 48 .
- the presence of the backing or barrier strip 320 permits the seal 340 to be formed while the inside surfaces 17 of zipper skirts 16 are not sealed to one another (see Figure 45 ). As previously described with reference to Figures 42-45 , the inner side 328 of strip 320 will not seal to inside surface 35a or zipper skirt 16 during sealing, thus permitting a seal without the need for a blade between the skirts 16.
- a press-to-close zipper assembly 20' having lower skirt (s) 16 and upper skirts 16a may be inserted in the fold structure 11.
- the gusseted, reclosable bag 100' with press-to-close zipper assembly 20' seen in Figures 49-52 includes at least one sheet of web material 10 having at least two areas of structural weakness 12.
- the weakened areas 12 define an integral tear off portion or fold structure 11.
- the gusseted, reclosable bag 100' is further defined by a gusseted portion 310 and a sealable fill opening 300 which is located between the fold structure 11 and gusseted portion 310.
- the press-to-close zipper assembly 20' typically includes a male track structure 330 and a female track structure 331.
- the male track structure 330 and the female track structure 331 each include an upper zipper skirt 16a of web material extending therefrom and a lower zipper skirt 16 extending therefrom.
- Each zipper skirt 16, 16a includes a predetermined coupling area arranged to be sealed to the parent film 10 at sealing location 14.
- the zipper skirt(s) 16 is heat sealed to the inside surface 35a, 35b of side panels, 35 and 36 respectively, of the parent film 10.
- a backing or barrier strip 320 is located between, and extends below the zipper skirts 16.
- the backing or barrier strip 320 is preferably two-ply and composed of a laminate film such as Curwood's 7182 barrier film.
- the strip includes a first side 328 and a second side 329.
- the first side 328 is preferably composed of Nylon, polypropylene, or any other substance known in the art that will not bond to the zipper skirt 16 or parent film 10 during heat sealing.
- the second side 329 may be provided with a sealant, such as a polyethylene, polyethylene blend, or a polyethylene co-extrusion.
- a sealant such as a polyethylene, polyethylene blend, or a polyethylene co-extrusion.
- the second or sealant side 329 of the strip 320 is sealed or tacked to the inside surface 17 of a zipper skirt 16 prior to insertion in the fold structure 11 at a location adjacent the sealable side fill opening 300 at seal 335.
- the inner, resistant side 328 of strip 320 prevents the skirt(s) 16 from sealing together along their respective inner surface 17 during sealing of the side fill opening 300.
- the backing or barrier strip 320 is preferably notched at 326 and 326a, as seen in Figure 54 , to allow proper sealing of side seal 30a.
- FIG. 49 two bags 100' having press-to-close zipper assembly 20' are shown prior to their being separated along seam 101.
- the score lines 12 are seen to be laid out in a portion that includes a tear notch 24.
- the tear notch 24 provides a starting point for removing the fold structure 11, which is located above the press-to-close zipper assembly 20'.
- the fold structure 11 being defined by the location of the score lines 12.
- the parent film 10 is sealed at area 26a to either its opposing sides 35 and 36 or the structure of the press-to-close zipper assembly 20'.
- the seal 30a extends down across notches 326,326a in strip 320.
- Reference numeral 26a refers to this general area of hermetic side seal 30a.
- the alternative seen in Figure 49 further includes a sealable fill opening 300 located below the fold structure 11 and above the bottom gusset 310.
- FIG. 50 a cross sectional view of the alternative of Figure 49 may be seen.
- the backing or barrier strip 320 is particularly seen, with the upper portion 324 thereof attached to the inside surface 17 of zipper skirt 16.
- the lower portion 322 of the barrier strip 320 is attached to the inside surface 36a of the parent film 10 at a point below the fill opening 300.
- the lower portion 322 is seen prior to attachment to inside surface 36a, with the fill opening 300 in the open position.
- web edges 400 are seen as not completely abutting. It is to be understood that while it is preferred that web edges 400 completely abut when opening 300 is in the closed and sealed position, it is further possible to include a closed opening 300 having non-abutting web edges 400.
- a press-to-close zipper assembly 201 may be introduced prior to the trapezoidal plow structure 200a.
- the parent film 10 is fed over a predetermined number of rollers and toward the plow 200a.
- the press-to-close zipper assembly 20' and backing strip 320 are fed over the parent film 10. It is presently believed that the press-to-close zipper assembly 20' and backing strip 320 must pass over the dancer rollers 203a so that they are kept sufficiently taut to allow notches 326, and 326a to be punched out accurately at predetermined positions such that the notches 326 and 326a will be in register with each other when the backing strip 320 is inserted between zipper skirts 16. As seen in Figure 54 , notch 326 is punched out prior to insertion of the strip 320 between skirt (s) 16, whereas notch 326a is punched out prior to insertion of press-to-close zipper assembly 20' into fold structure 11.
- notch 326 is preferably formed such that the distal margin 342 of skirt 16 extends into the notch 326. This configuration allows notch 326a to be formed by die 214' while preventing skirt 16 from inadvertent notching by die 214'. Die 214" punches notch 326.
- Figure 55a illustrates the position of notches 326, 326a relative the backing strip 320 and distal margin 342 of zipper skirts 16. The press-to-close zipper assembly 20' is heat sealed by sealer 216 to strip 320 at seal 335.
- the parent film 10 is folded over the press-to-close zipper assembly 20' to form the fold structure 11.
- the parent film 10 Prior to being passed over the trapezoidal plow 200a, the parent film 10 it passes over a zipper sealer mechanism 216 whereby the zipper skirts 16 are sealed to the parent film 10 at the inside surfaces 35a, 35b of opposing sides 35, 36 respectively.
- the press-to-close zipper assembly 20' and backing strip 320 further passes over a blade 450 which allows the skirts 16 and 16a to be heat sealed to the web 10 while preventing the inner surfaces 17 of the skirts 16, 16a from sealing together.
- gusset holes 344 are die punched by die 344a at a predetermined position designed to be in general alignment with side seal 30a.
- the gusset holes 344 allow gusset folds to be attached to each other at side seal 30a thereby adding rigidity to the gusset portion 310 of the gusseted bag 100'. This added rigidity enables the gusseted bag 100' to stand up by itself when placed on a flat surface, such as a table or refrigerator shelf (not seen in these views).
- a header material 206 may be fed over the parent film 10.
- the header strip 206 if used, is sealed to the parent film 10 at seal 206a, seen particularly in Figure 54 .
- the remaining manufacturing process is carried out as generally illustrated in Figure 55 .
- the parent film 10 with attached press-to-close zipper assembly 20' and strip 320 passes over a trapezoidal folding board or plow 200a.
- the folding step leaves a flat bottom prior to the parent film 10 being passed over a tucking board 334.
- the tucking board 334 reverse folds the previously formed flat bottom of the parent film 10 into a gusset 310.
- the side seal 30a is made and tear notch 24 is added to facilitate removal of the fold structure 11.
- the barrier strip 320 preferably marginally enters the area of side seal 30a at seal area 26a. A majority of the strip 320 is removed by notches 326 and 326a, thereby allowing a hermetic seal to be formed at 30a.
- the barrier strip 320 minimally enter the side seal 30a area, it is to be understood that the barrier strip may end before, at, or beyond the side seal 30a at area 26a.
- An opening 123 is die punched in the package 100' to provide a point where the package 100' may be easily hung for display purposes.
- the package 100' is then cut along seam 101 from the bag making portion of the form fill and seal machine and transferred to the fill and seal stations where the side fill opening 300 is opened and the package 100' is filled through side fill opening 300.
- the opening 300 is then hermetically sealed at seal 340.
- the seal 340 is formed without use of a blade between the skirts 16, due to the presence of strip 320 between the skirts 16 which prevents the inside surfaces 17 of skirts 16 from sealing together while the opening 300 is sealed.
- the gusseted, side fill bags 100 and 100' having a backing or barrier strip 320 may alternatively include any of the features disclosed with reference to the embodiments shown in Figures 1-4 .
- a brush applied, anti-seal agent such as nitrocellulose obtained from Amantceh may thereby take the place of the barrier or backing strip 320 and provide a non-bonding function to the inside surface 17 of the zipper skirts 16 during seal of the fill opening 300.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bag Frames (AREA)
- Making Paper Articles (AREA)
- Packages (AREA)
- Packging For Living Organisms, Food Or Medicinal Products That Are Sensitive To Environmental Conditiond (AREA)
- Containers And Plastic Fillers For Packaging (AREA)
Description
- Related prior art is, for instance, disclosed in
US 3,780,781 ,US 4,925,316 andUS 5,660,479 , of which documentUS 3,780,781 discloses a bag according to the preamble ofclaim 1. - The present invention relates generally to the field of reclosable bags and more specifically to reclosable bags that use or incorporate tamper evident, hermetic seal, and reclosable fastener assemblies or mechanisms of the slider, zipper, or press-to-close type.
- The present invention is particularly concerned with a reclosable bag that may be filled with a food product at a factory or food processing plant and then sealed to protect the food product until such time as a customer purchases the reclosable bag and opens it to access the food product within.
- Reclosable, typically flexible, containers are well known in the art. Such containers normally comprise a bag-like structure made from a folded web of material, like thermoplastic film. These types of containers may also include reclosable zipper structures, as well as interlocking male and female zipper elements fused, extruded, or attached to the bag sidewalls. Alternatively, the reclosable zipper structures, mechanisms, or assemblies may also be identified as slider closure systems, i.e., a closure system for slider bags and form, fill and seal technology that contain two tracks that can be interlocked and a separate part (a slider) that rides on the tracks and is used to open and/or close the tracks. The bag-like structure is created when the thermoplastic film is folded, sealed, and severed along its exposed edges.
- Reclosable bags are a great convenience to the consumer. This is especially true where the food product or material contained within the bag is of a type that may not all be consumed at once, for example, shredded cheese, sliced cheese, cheese, processed cheese, deli meats, snack foods, vegetables, fruits, sweets, etc. A problem with these types of bags is achieving a design in which the food product is hermetically sealed against oxygen, atmospheric intrusion or transmission, bacteria, molds, and/or other sources of contamination, while also providing features that help to disclose to the consumer evidence of tampering without substantially interfering with the ease of use of the bag.
- In addressing this problem it is also desired to achieve a design that is easy to manufacture and may be used in combination with known types of packaging machinery that use form, fill, and seal technology such as Horizontal Form Fill and Seal (HFFS) machines or Vertical Form Fill and Seal (VFFS) machines. It is also desired to achieve a design that may optionally be used in combination with Horizontal Flow Wrapper (HFW) machines; e.g., J-WRAP machines presently available from Jones Automation Company, Inc. of Beloit, Wisconsin.
- Tamper evident packaging may also require the use of several pieces of film, which must then be connected to each other. This can make manufacturing of the reclosable bag more complicated.
- Gusseted style packages are additionally greatly convenient to the consumer. Gusseted style packages allow the package to stand upright due to their wider base. This is true when it is desirable to stand a package upright by itself. Further, the wider base of the gusseted style package enables them to hold a greater volume of product than a conventional four-sided seal package of similar dimensions. The challenge has been to combine the convenience of a zippered packaged in one gusseted, reclosable bag.
- With a "press to close" type zipper, the gusset style package is typically formed with the gusset at the bottom and the zipper at the top. This type of package is filled through the opened zipper. Several problems have arisen during production and filling of this type package. For example, in the package making process, it is necessary for the "press to close" zipper to be closed (i.e. the male and female profiles need to be engaged), when the zipper profiles are fused together at the side seal. If the male and female profiles are not engaged, they are subject to misalignment. If they are misaligned at the side seal station, the resulting package will have a zipper that does not close completely, specifically adjacent to the side seal, and a leaky package results. Furthermore, after the side seal is added, the usually simple process of opening the zipper for filling using a stationary blade to plow the zipper open, is no longer a reasonable option. Rather, the zipper must be opened, by either pulling the sides of the package that the zipper is attached to apart, or by holding the sides securely while a plunger lowers into the upper portion of the package, forcing the zipper open. Regardless of the method chosen, an unacceptable percentage of unopened packages or damaged zippers results.
- An additional problem encountered by usual top filling of the zippered, gusseted bag, is product waste and contamination of zipper profiles. As a solution to this problem, some filling processes lower a fill tube into the package and past the zipper profiles area in an attempt to protect the profiles from the product. This technique reduces profile contamination, but does not eliminate it. This is because clearance must be maintained between the fill tube and the package walls to ensure consistency of tube insertion and to provide an exit passage for the air of the package that the product is displacing. In the stream of air exiting the package to make room for the product, some product is inevitably included, and profile contamination results.
- A further problem associated with traditional top filling of zippered, gusseted packages occurs when the zipper is closed after the package has been filled with product. The usual method forces the zipper closed by applying force to both sides of the zipper and in a direction tangent to the sides of the package. This process may not consistently close the zipper and those that do close may have product pushed into the zipper profiles.
- Gusseted packages using a slider type zipper encounter additional filling problems. In filling a package of this type, the slider portion of the zipper must be slid from one side of the package to the other in order to open the profiles. Once the package is filled, the sliding of the slider portion must be reversed to close the top. This process is difficult and expensive, rendering top filling through slider type zippered packages to be commercially impractical.
- The closest gusseted package references are believed to be
U.S. Patent No. 5,938,337 issued on 17 August 1999 ,U.S. Patent No. 5,529,394 issued on 25 June 1996 , andU.S. Patent No. 5,417,040 issued on 23 May 1995 . Although these patents disclose advantageous methods, they fail to fully utilize the benefits of a gusseted type package. Namely, because of the wider base provided in a gusseted bag, they are able to hold a greater volume than conventional four sided seal packages of the same height and width. The above-mentioned patents provide methods for filling the gusseted bag from the gusset side of the package and opposite the closure mechanism. However, when a gusseted bag is filled from the bottom, gusseted side, product stacks upward in the package similarly to filling a conventional four sided package. The result is the inability to fully utilize the added volume benefit that the gusset provides. - It is one of the objectives of the present invention to provide a reclosable bag that may be manufactured using known packaging machinery. As previously, noted, such known machinery includes HFFS machines, VFFS machines, and HFW machines. Additionally, as will be apparent to a person of skill in the art after reading the present disclosure contained herein thermoform type machines like the one disclosed in
US Patent No. 4,240,241 could also be used to practice the present invention disclosed herein, after appropriate modification as the disclosure herein will make apparent. - It is also an objective to perform the manufacturing task using only one piece of parent film in combination with a reclosable zipper assembly.
- Further, it is an objective of the invention to provide the manufacturer with the option of including some or all the features of tamper resistance or evidence, hermetic seal, and ease of use in the reclosable bag that is produced.
- Another objective, especially with slider or zipper type structures or sliding type zippers or fasteners is ease of use. While a sliding type zipper structure is itself relatively easy to use, the bag structures include sidewalls or fin portions that extend up past the sliding type zipper structure. This interferes with the consumer's access to the food, makes it difficult to see the zipper structure, and also makes it more difficult to easily operate the zipper mechanism. This is especially true if the person opening and closing the bag is disabled, has arthritis, or another aliment, which limits the manual dexterity of that person.
- Additionally, increased ease of access to the food product is an objective because the larger the zipper structure and its associated elements the smaller the opening left to the consumer to access the food product.
- It is a further objective to provide a reclosable gusseted package that may be side filled with product.
- It is another objective to provide a reclosable gusseted package that may be side filled and avoid zipper profile contamination.
- It is another objective to provide a reclosable, gusseted package that may be side filled to ensure optimal volumetric filling of the gusseted portion.
- It is one of the objectives of the present invention to provide a gusseted reclosable bag that may be manufactured using known packaging machinery, such known machinery includes HFFS machines.
- The present invention is believed to address these and other objectives by the unique and simple structures and methods disclosed herein.
- The present invention may generally be described as a reclosable bag for filling with at least one food product. The reclosable bag includes at least one sheet of web material. The sheet of web material has at least two areas of structural weakness and at least one fold structure located between and defined by the two areas of structural weakness. The reclosable bag includes an opening located generally opposite the fold structure. (Please note that fold structure as used in the specification and claims herein is to be interpreted as broadly as possible and should include not only structures that are a fold but also any structure that has the same or similar characteristics to a fold even though said structure may be formed by non-folding means or methods such as the result of joining or fusing the edges of two or more sheets of film.) In addition, the reclosable bag includes a sliding fastener structure having a skirt structure of web material extending therefrom and located within the fold structure. The skirt structure or skirt material may be either integral to the slider fastener structure or it may be coupled, e.g., sealed or adhered, to the slider fastener structure. The skirt structure includes a distal margin that is coupled to the sheet of web material at a location between the areas of structural weakness and the opening. The web material of the reclosable fastener structure extending past the areas of structural weakness so that the reclosable fastener structure is located within the fold structure. The reclosable bag is capable of being filled with at least one food product through the opening.
- The reclosable bag structure of the present invention may optionally include other features. For example, but not by way of limitation, the skirt may include an outside surface and an inside surface. The distal margin is located on the outside surface. The inside surface may include a predetermined area having a releasable adhesive material. This allows for the option of having a peelable seal, which may be used to aid in making the reclosable bag initially hermetic and may also add another reclosable/resealable feature to the bag. (Please note that the terms reclosable, resealable, and releasable, in addition to their normal meaning, are used herein, interchangeably, to describe a closed or sealed opening that may be re-opened at a predetermined time to aid in providing access to at least a portion of the contents of the bag, and then closed or sealed to allow the remaining contents to be stored in the bag for later use and/or provide evidence of tampering.)
- Additionally, and more typically, the web material of the reclosable bag is substantially comprised of a predetermined portion of a roll of a parent film material. The predetermined portion having predetermined dimensions from which a reclosable bag of predetermined dimensions may be constructed. The parent film material may be manufactured to a specification which determines the shape and location of the areas of structural weakness and which makes the areas of structural weakness an integral part of the parent film. Presently, it is believed to be commercially preferred to do so. Alternatively, the areas of structural weakness could be applied to the parent film at a predetermined step of the construction or manufacturing process of the resealable bag.
- Further, the areas of structural weakness may extend intermittently, continuously, and linearly, nonlinearly, or in some other predetermined pattern across a predetermined dimension of the sheet of web material. The predetermined dimension where the area of structural weakness is located may be either the length or the width of the reclosable bag, which is usually rectangular in shape, depending on whether or not it is desired to use the long edge or side of the bag or the short edge or side of the bag with the slider closure system. Use of the long edge of the bag provides for a larger opening and thus enhances the ease of access to the food material or other materials contained within the reclosable bag.
- The term structural weakness is generally used to describe that area of the reclosable bag that is intentionally designed to be easily torn by the consumer to provide for evidence of tampering and to allow for easy exposure of the zipper mechanism or assembly. Nonetheless, it should be understood that use of the term structural weakness should include, without limiting its meaning, structures such as perforation, scores, microperforations, and multiple laminate materials which include a layer having an area of material or materials which are specifically designed to be easily torn. Accordingly, it should be understood that the areas of structural weakness are intentionally designed to create a predetermined tear path, which may or may not be hermetic.
- Also, opening of the bag may be facilitated by the application of a tear strip (e.g., tear tape or tear string) along a predetermined surface or surfaces of the parent film. The tear strip may or may not be used in combination with a predetermined area of structural weakness.
- Alternatively, the present invention may be described as a reclosable bag for filling with at least one food product and comprising at least one sheet of a web material. The sheet of web material includes a first area of structural weakness and a second area of structural weakness. (Alternatively, the areas of structural weakness may be tear areas or areas having a propensity to tear in a predetermined direction.) The sheet of web material including at least one fold structure, located between and defined by the first and second areas of structural weakness, and a fill opening. The sheet of web material further comprising a first panel coupled to the fold structure at the first area of structural weakness and a second panel coupled to the fold structure at the second area of structural weakness. A reclosable fastener structure including a male track structure and a female track structure. The male track structure including a first fin structure of web material extending therefrom and the female track structure including a second fin structure of web material extending therefrom. Each fin structure including a predetermined coupling portion. The coupling portion of the first fin structure being coupled to the first panel and the coupling portion of the second fin structure being coupled to the second panel. (please note that the seal, when it is formed, may be adjacent or near but should not be on the area of structural weakness). The reclosable fastener structure extending past the areas of structural weakness and into the fold structure. The areas of structural weakness being located below the reclosable fastener structure. The alternative reclosable bags are also capable of being filled with at least one food product through the fill opening, which is subsequently sealed.
- The present invention allows the fold structure to be easily removed from the reclosable bag. More importantly the present invention allows the consumer to substantially expose the reclosable fastener structure so that it is easily accessible and the consumer does not have to be impeded by bag sidewalls or bag fin portions that extend up past the zipper structure. Finally, the present invention accomplishes this using but not limited to substantially one piece of film material.
- Alternatively, the present invention may be described as a reclosable bag for filling with at least one food product. The reclosable bag may include at least one sheet of web material, at least one tear tape structure, at least one fold structure, and an opening located generally opposite the fold structure. A reclosable fastener structure including at least one integral skirt structure of skirt web material extending therefrom. The integral skirt structure including at least one distal margin. The distal margin being coupled to the web material at, at least one location between the tear tape structure and the opening. The reclosable fastener structure extending past the tear tape structure and into the fold structure. The reclosable bag capable of being filled with at least one food product.
- Additionally, the reclosable bag for filling with at least one food product, may also be described as a reclosable bag including at least one sheet of web material having at least one fold structure presenting at least two sidewall structures having inside surfaces, and an opening located generally opposite the fold structure. A reclosable fastener structure including an integral skirt structure comprising a web material extending therefrom and including opposed distal margin structures. The web material of the integral skirt structure being sealed to the inside surfaces of the sidewall structures at a plurality of predetermined sealing areas. The reclosable bag may also include a barrier web material extending between and coupled to the distal margin structures.
- The barrier web material of the alternative bag may alternatively extend between and be coupled to the sidewall structures. Alternatively, the barrier web material may also be coupled to predetermined sealing areas by at least one peelable seal. Alternatively, the barrier web material may include at least one area of structural weakness that extends through it along a direction generally parallel to the predetermined sealing areas.
- Alternatively, the reclosable bag for filling with at least one food product of the present invention may include at least one sheet of web material having at least one predetermined tear area, at least one fold structure, and an opening located generally opposite the fold structure. A reclosable fastener structure including at least one integral skirt structure of skirt web material extending therefrom. The integral skirt structure including at least one distal margin. The distal margin being coupled to the web material at, at least one location between the tear area and the opening. The reclosable fastener structure extending past the tear area and into the fold structure. The reclosable bag capable of being filled with at least one food product.
- This alternative reclosable bag structure may further include at least one piece of a header material located in a predetermined area of the fold structure. The header material may include at least one edge structure adjacent the tear area. The reclosable bag of this alternative structure may further include at least one tear tape structure coupled to the web material and adjacent to the tear area.
- Alternatively, the present invention may be described as a reclosable bag for filling,with at least one food product. The reclosable bag may include at least one sheet of web material, at least one tear tape structure, at least one fold structure, and an opening. A reclosable fastener structure including at least one integral skirt structure of skirt web material extending therefrom. The integral skirt structure including at least one distal margin. The distal margin being coupled to the web material at, at least one location between the tear tape structure and the opening. The reclosable fastener structure extending past the tear tape structure and around and over the fold structure. The reclosable bag capable of being filled with at least one food product.
- Additionally, the reclosable bag for filling with at least one food product, may also be described as a reclosable bag including at least one sheet of web material having at least one fold structure, and an opening. A reclosable fastener structure including an integral skirt structure comprising a web material extending therefrom and including opposed distal margin structures. The web material of the integral skirt structure being sealed to the outside surfaces of the sidewall structures at a plurality of predetermined sealing areas. The inside surface of the reclosable bag may also include a predetermined area having a releasable adhesive material. This allows for the option of having a peelable seal, which may be used to aid in making the bag initially hermetic and may also add another reclosable/resealable feature to the bag.
- Additionally, the present invention may be described as a method of construction using known form-fill-and-seal machinery including but not limited to HFFS, VFFS, and HFW machines. The steps of the method of construction include 1. Folding the sheet of web material along a predetermined folding area located between the areas of structural weakness to form the fold structure. 2. Inserting the reclosable fastener into the fold structure. 3. Coupling the distal margin of the integral skirt structure to the web material. 4. Sealing the web material along at least two predetermined linear areas located generally perpendicular to the fold structure. 5. Filling the reclosable bag with at least one food product through an opening. 6. Sealing the opening. Please note that in an HFW application it is presently believed that the step four should occur last.
- The method may also include a step of inserting either a tear tape or a tear string at least prior to step four. Further, a header strip could also be introduced prior to step four.
- Alternatively, the web material may be slit along the fold line and the reclosable fastener assembly inserted and sealed to result in an exposed zipper structure assembly at one end of the bag.
- Also, alternatively, if the reclosable bag is designed to have a gusset opposite the zipper opening then the fill opening may be sealed and the bag may be filled with product through the zipper opening.
- Alternatively, the present invention may generally be described as a gusseted, reclosable bag for filling with at least one food product. The gusseted, reclosable bag includes at least one sheet of web material. The sheet of web material has at least two areas of structural weakness, a gusseted portion, at least one fold structure and an opening located generally between the fold structure and the gusseted portion.
- In addition, the reclosable bag includes a sliding fastener structure having a skirt structure of web material extending therefrom. The skirt structure or skirt material may be either integral to the slider fastener structure or it may be coupled, e.g., sealed or adhered, to the slider fastener structure. The skirt structure includes a distal margin that is coupled to the sheet of web material at a location between the fold and the opening. The reclosable bag is capable of being filled with at least one food product through a fill opening located between the skirt structure and the gusseted portion.
- A backing or barrier strip structure is inserted between and extending below the zipper skirts along the side fill opening. The backing or barrier strip structure may be made out of any suitable material but is preferably two-ply and composed of a laminate film such as Curwood's 7182 barrier film. One side of the barrier strip structure to be used in the present invention is nylon, or any other suitable material such as polypropylene, which will not bond to the parent film. The opposite side of the barrier strip structure may be provided with a sealant such as polyethylene, polyethylene blend, or a polyethylene co-extrusion. The sealant side is sealed or tacked to the inside surface of the top (or front side) zipper skirt prior to insertion into an upper fold (i.e. fold structure). Once inserted into the upper fold, the front side of each zipper skirt is sealed to the parent film. The parent film then passes over folding boards to form a bottom gusset. The remaining unsealed edge of parent film extends upward to meet the other edge located at zipper skirt. After filling with product, the final sealing bar seals the parent film to the zipper skirt and a portion of the barrier strip structure to make a hermetic package. With the barrier strip structure inserted between and extending below the zipper skirts, the zipper skirts will not seal to each other and the nylon side of the barrier strip structure will not seal to the opposite inside surface of the parent film.
- The gusseted, reclosable bag structure of the present invention may optionally include other features. For example, but not by way of limitation, the skirt may include an outside surface and an inside surface. The distal margin is located on the outside surface. The inside surface may include a predetermined area having a releasable adhesive material. This allows for the option of having a peelable seal, which may be used to aid in making the reclosable bag initially hermetic and may also add another reclosable/resealable feature to the bag.
- Alternatively, if the reclosable bag is designed to have a gusset opposite the zipper opening, the bag may be filled with product through a fill opening located between the zipper skirt and the gusseted portion.
- Alternatively, the present invention may be described as a gusseted, reclosable bag for side filling with at least one food product and comprising at least one sheet of a web material. The sheet of web material includes a first area of structural weakness and a second area of structural weakness. (Alternatively, the areas of structural weakness may be tear areas or areas having a propensity to tear in a predetermined direction.) The sheet of web material including at least one fold structure, located between and defined by the first and second areas of structural weakness, a fill opening, a backing or barrier strip structure, and a gusseted portion. A reclosable fastener structure including a male track structure and a female track structure. The male track structure including a first fin or skirt structure of web material extending therefrom and the female track structure including a second fin or skirt structure of web material extending therefrom. Each fin structure including a predetermined coupling portion. (Please note that the seal, when it is formed, may be adjacent or near but should not be on the area of structural weakness). The reclosable fastener structure extending past the areas of structural weakness and into the fold structure. The areas of structural weakness being located below the reclosable fastener structure.
- The backing or barrier strip structure is inserted between and extending below the fin or skirt structures along the side fill opening. As in the previous embodiment, one side of the barrier strip structure to be used is nylon, or any other suitable material such as polypropylene, which will not bond to the parent film. The opposite side of the barrier strip structure may be provided with a sealant such as polyethylene, polyethylene blend, or a polyethylene co-extrusion. The sealant side of the backing or barrier strip of this alternative embodiment may be sealed or tacked to the inside surface of the top (or front side) zipper skirt prior to insertion into an upper fold (i.e. fold structure). Once inserted into the upper fold, the front side of each zipper skirt is sealed to the parent film, as discussed with regard to the reclosable gusseted bag with sliding fastener structure. Alternatively, an anti-seal agent may be brush applied to the inside surface of the zipper skirt prior to insertion into an upper fold.
- Alternatively, the present invention may be described as a gusseted, reclosable bag for side filling with at least one food product. The reclosable bag may include at least one sheet of web material, at least one fold structure, at least one gusset structure, a side fill opening having a backing or barrier strip structure, located generally between the fold structure and the gusset structure. A reclosable fastener structure including at least one integral skirt structure of skirt web material extending therefrom. The integral skirt structure including at least one distal margin. The distal margin being coupled to the web material at, at least one location between the fold structure and the opening. The reclosable bag capable of being filled with at least one food product.
- This alternative reclosable bag structure may further include at least one piece of a header material located in a predetermined area of the fold structure. The header material may include at least one edge structure adjacent the tear area.
- Additionally, the present invention may be described as a method of construction using known form-fill-and-seal machinery including but not limited to HFFS, VFFS, and HFW machines. The steps of the method of construction include 1. Placing a backing or barrier strip structure in registration with the side seal. 2. Punching out the strip in the area that is both in the side seal and adjacent to the skirt of the zipper to which the backing or barrier strip will be attached. 3. Attaching the backing or barrier strip to the inside face of one of the skirts of a zipper track with sealant side of the strip facing the inside surface of the skirt. 4. Heat sealing a portion of the remaining strip adjacent the zipper skirt to the zipper skirt. 5. Folding the sheet of web material along a predetermined folding area located between areas of structural weakness to form a fold structure. 6. Inserting the reclosable fastener and attached backing strip structure into the fold structure. 7. Attaching the zipper track to the web in a location relative to the areas of structural weakness by heat sealing the web to the skirt portions of the zipper track. 8. Positioning the edge of the web such that it is attached to, but not covering the entire portion of, the skirt having the barrier strip attached. 9. Passing the remaining web across folding boards such that a gusset is formed at the bottom of the package. 10. Folding the other edge of web material upward to the remaining exposed zipper skirt having the backing or barrier strip attached, and adjacent to the first edge of the web. 11. Sealing the web material along at least two predetermined linear areas located generally perpendicular to the fold structure. 12. Filling the reclosable bag with at least one food product through the side opening. 13. Sealing the opening.
- The method may also include a step of introducing a header strip prior to step ten.
- Alternatively, the process and structure of the present invention could include a reclosable fastener assembly having two skirts or flaps of web material. The first skirt could be coupled or sealed to the parent film prior to folding the parent film. (Additionally, the first skirt could be tack or partially sealed prior to folding and then subsequently a full seal applied in the HFFS, VFFS, or HFW machine.) After folding the parent film the second skirt or flap would be sealed to the film sidewall located opposite the sidewall to which the first skirt is sealed or coupled. Construction of the bag could then be completed as disclosed herein.
-
-
Figure 1 is a top plan view of a predetermined portion of parent film comprising a sheet of web material including at least two areas of structural weakness. -
Figure 2 is an edge elevational view of a portion of the sheet of web material ofFigure 1 and shows the location of the areas of structural weakness. -
Figure 3 is a side elevational view of the fold structure of a reclosable bag of the present invention showing the position of the slider or zipper structure in the fold structure relative to the predetermined position of the areas of structural weakness. -
Figure 4 is a perspective view of the embodiment shown inFigure 3 . -
Figure 5 is a front plan view of a first embodiment of the present invention. -
Figure 6 is a front plan view of an alternative to the first embodiment of the present invention disclosing sealedtrack mass 23b. -
Figure 7 is a front plan view of an alternative embodiment of the present invention. -
Figure 8 is a view taken fromline 8--8 ofFigures 5 and6 . -
Figure 9 is an alternative to the embodiment of the present invention shown inFigure 8 . -
Figure 10 is another alternative to the embodiment shown inFigure 8 . -
Figure 11 is an alternative to the embodiment shown inFigure 10 wherein a peal seal tape with a releasable adhesive located on one side of the tape is used. -
Figure 12 is a view from line 12-12 ofFigure 11 , theheader material 15 that is shown, along with other structures, is optional. -
Figure 13 is another alternative to the embodiment shown inFigure 8 . -
Figure 14 is a front plan view of another alternative embodiment of the present invention. -
Figure 15 is a view taken fromline 15--15 ofFigure 14 . -
Figure 16 is an example not according to the invention. -
Figure 17 is another alternative to the embodiment shown inFigure 15 . -
Figure 18 is another alternative to the embodiment shown inFigure 15 . -
Figure 19 is a front plan view of an alternative embodiment of the present invention. -
Figure 20 is a view fromline 20--20 ofFigure 19 . -
Figure 21 is a plan view of an alternative embodiment of the present invention illustrating various features of the invention including die cutting of the track mass of the zipper assembly and the use of a tear structure like a tear tape or a tear string. -
Figure 22 is a view fromline 22--22 ofFigure 21 . -
Figure 23 is a view of an alternative to the embodiment shown inFigure 22 wherein tear tape is applied to both the inside and outside surface of the bag. -
Figure 24 is a cut-away view of an alternative to the embodiment shown inFigure 22 wherein the tear tape includes a tear bead. -
Figure 25 is a perspective view of the embodiment shown inFigure 24 . -
Figure 26 is a cut-away view of a predetermined portion of the embodiment shown inFigure 24 illustrating the tear tape and tear bead's relationship to the film and the area of structural weakness created as a result of the presence of the tear bead. -
Figure 27 is an alternative embodiment to the structure disclosed inFigure 22 . -
Figure 28 is a plan view of an alternative embodiment of the present invention illustrating various features of the invention including the use of an optional header strip and the use of an optional opening to assist in removal of the hood and exposure of the zipper assembly. -
Figure 29 is a view from line 29--29 ofFigure 28 . -
Figure 30 is a schematic diagram showing the components of another alternative embodiment of the present invention being fed into a machine suitable for adaptation to perform the process and make at least one of the products disclosed herein before the plow structure of the machine. -
Figure 31 is a schematic diagram showing the components of another alternative embodiment of the present invention being fed into a machine suitable for adaptation to perform the process and make at least one of the products disclosed herein before the plow structure of the machine. -
Figure 32 is a schematic top plan view illustrating at least one method by which the components of the alternative embodiment disclosed inFigure 30 are introduced prior to the plow mechanism of the form fill and seal machine. -
Figure 33 is a schematic top plan view illustrating at least one method by which the components of the alternative embodiment disclosed inFigure 31 are introduced prior to the plow mechanism of the form fill and seal machine. -
Figure 34 is a perspective view generally showing the general relationship of the components for making the various embodiments disclosed herein. Specifically, the embodiment having the peel seal tape is disclosed although after review of this disclosure it will be apparent to a person of ordinary skill in the art how the machinery may be modified to produce the various embodiments disclosed, described, and claimed herein. -
Figure 35 is side elevational schematic view illustrating the steps of construction of the alternative embodiment disclosed inFigure 30 subsequent to folding the parent film on the plow structure. -
Figure 36 is side elevational schematic view illustrating the steps of construction of the alternative embodiment disclosed inFigure 31 subsequent to folding the parent film on the plow structure. -
Figure 37 is an alternative embodiment of the present invention illustrating various features of the invention including the use of tear string and a diamond shaped opening as opposed to a circular opening for assisting in the removal of the hood and exposing the zipper assembly. -
Figure 38 is a schematic diagram showing the components of another alternative embodiment of the present invention being fed into a machine suitable for adaptation to perform the process and make the product disclosed herein, wherein either a tear string or the zipper assembly are introduced to the parent film after the plow. -
Figure 39 is a side elevational schematic view illustrating the steps of construction of the alternative embodiment disclosed inFigure 38 wherein the tear string or slider or zipper assembly is introduced after the plow structure. -
Figure 40 is a front plan view of an example not according to the invention. -
Figure 40a is a front plan view of the alternative shown inFigure 40 , but showing a peel seal area. -
Figure 41 is a view taken from line 41 - 41 ofFigure 40a and showing the reclosable fastener structure extending over the fold structure and peel seal. -
Figure 41a is an enlarged view of the structure shown inFigure 41 and showing the position of the slider or zipper structure over the fold structure relative to the predetermined position of the areas of structural weakness. -
Figure 42 is a front plan view of an alternative embodiment of the present invention. -
Figure 43 is a view taken from line 43-43 ofFigure 42 and showing a gusset portion, a slider fastener, and barrier strip and fill opening therebetween. -
Figure 44 is a view similar to that shown inFigure 43 but with the gusset portion open and showing a flattened bottom. -
Figure 45 is a side elevational view of the fold structure of the reclosable bag shown inFigures 42 - 44 showing the position of the slider or zipper structure in the fold structure relative to the barrier strip and fill opening, and showingside 36 in phantom in position for filling through side opening, andside 36 in solid line illustrating the closed opening after filling. -
Figure 45a is a partially cut-away perspective view of the alternative embodiment shown inFigure 45 . -
Figure 46 is a schematic diagram illustrating at least one method by which the components of the alternative embodiment disclosed inFigures 42 - 45 are assembled. -
Figure 47 is a schematic top plan view illustrating at least one method by which the components of the alternative embodiment disclosed inFigures 42-45 are introduced prior to the plow mechanism of the form fill and seal machine. -
Figure 48 is a side elevational schematic view illustrating the steps of construction of the alternative embodiment disclosed inFigure 42-45 subsequent to folding the parent film on the plow structure and tucking board. -
Figure 49 is a front plan view of an example not according to the invention. -
Figure 50 is a view taken from line 50-50 ofFigure 49 and showing a gusset portion, press-to-close fastener with barrier strip, and fill opening between the gusset portion and fastener. -
Figure 51 is a view similar to that shown inFigure 50 but with the gusset portion open and showing a flattened bottom. -
Figure 52 is a side elevational view of the fold structure of the reclosable bag shown inFigures 49 - 51 showing the position of the press-to-close zipper structure in the fold structure relative to the barrier strip and fill opening, and showingside 36 in phantom while in position for filling through the fill opening andside 36 in solid line illustrating the closed and sealed, post-fill position. -
Figure 53 is a schematic diagram illustrating at least one method by which the components of the embodiment disclosed inFigures 49-52 are assembled. -
Figure 54 is a schematic top plan view illustrating at least one method by which the components of the embodiment disclosed inFigures 49-52 are introduced prior to the plow mechanism of the form fill and seal machine. -
Figure 54a is a cross sectional view taken alonglines 54a-54a ofFigure 54 and showing the press-to-close zipper structure and backing strip. -
Figure 55 is a side elevational schematic view illustrating the steps of construction of the alternative embodiment disclosed inFigures 49-52 subsequent to folding the parent film on the plow structure and tucking board. -
Figure 55a is an enlarged partial view of the area referred generally as 55a inFigure 55 . -
Figure 56 is a perspective view generally showing the general relationship of the components for making the gusseted embodiments shown inFigures 42-55a . -
Figure 57 is a perspective view generally showing the relationship of the components for making a prior art gusseted bag. -
Figure 58 is a perspective view of a prior art, top filled gusseted bag. -
Figure 59 is a perspective view of a side fill gusseted bag of the present invention and showing a slider type zipper and a backing strip. - Although the disclosure hereof is detailed and exact to enable those skilled in the art to practice the invention, the physical embodiments herein disclosed merely exemplify the invention which may be embodied in other specific structures or methods. While the preferred embodiment has been described, the details may be changed without departing from the invention, which is defined by the claims.
- The present invention is both a method and a structure resulting from the method. The present invention generally relates to reclosable
plastic bags 100 and, more particularly, to a reclosableplastic bags 100 having a slider orzipper assembly 20, which cooperates with a tamper-evident feature. The tamper-evident feature may also be a hermetic seal feature. The method of the present invention, while unique and fully described herein, may be used on known machinery such as, by way of illustration and not by way of limitation, therpm 100 packaging machine manufactured by Klockner Packaging Machinery of Sarasota, Florida, U.S.A. The modifications necessary to the machinery used to practice the present invention will be apparent to a person of ordinary skill in the art after reading this disclosure. - Reclosable plastic bags using various zippers and sealing mechanisms are well known. However, the advantages of the present invention are believed not to be apparent from the known zippers and sealing mechanism of the prior art. The
zipper assembly 20 typically includes azipper structure 20a and anintegral skirt 16. In the present invention, theskirt 16 is bonded to theparent film 10 at apredetermined seal location 14. SeeFigure 3 . - Referring to
Figures 1-5 , the method and structure of the present invention may begin to be generally described. Referring toFigure 1 a predetermined portion of theparent film 10 is illustrated. Theparent film 10, at predetermined locations, is structurally weakened, e.g., by the use of presently known laser scoring technology. - Referring to
Figure 2 , an elevational edge view of theparent film 10 including the score lines 12 may be seen. The weakenedarea 12 may also be imperforate and hermetic. The weakenedareas 12 define an integral tear off portion or foldstructure 11. - Referring to
Figure 3 , thefilm 10 is folded over, as shown, to form thefold structure 11 and azipper assembly 20 is inserted. Weakenedareas 12 are positioned below thezipper structure 20a so that when fold structure orhood 11 is removed thezipper structure 20a is exposed sufficiently above the resultingfin structures 19 to allow the user access to thezipper structure 20a. Zipper skirts 16 are shown bonded to thefilm 10. However, it is presently believed preferable, prior to insertion of thezipper assembly 20, that the uncut ends 23 (seeFigure 5 ) of eachzipper assembly 20 be punched out or cut to form aradiused notch 22a, as shown inFigure 7 . The cut zipper assembly ends 22 are sealed together (the sealedmass 22b ofFigure 7 ) which will later function to retain the contents of thebag 100 such as food. - Referring back to
Figure 3 , the skirt(s) 16 remain intact so that thezipper assembly 20 is kept continuous for ease of handling. Once inserted the skirt(s) 16 of thezipper assembly 20 is bonded to theinside surface 10a of theparent film 10 at seal location(s) 14. -
Next sides margin 10c illustrated inFigures 5 or7 , using a known mechanism such as a heat-sealing bar of a form fill and seal machine by advancing the foldedfilm 10 to the heat sealing bar portion of the machine used; creating aseal 30a across the length and width ofmargin 10c. The resultingbag 100 is then filled with a predetermined foodstuff or other desired material through theopening 33 located, opposite thezipper assembly 20, atbottom edge 34 shown inFigure 5 or7 . Thenbottom edge 34 is subsequently sealed, formingseal 34a. - This results in the
zipper assembly 20 being hermetically sealed within the tear offportion 11. Tear offportion 11 is integral to theparent film 10. Integral tear offportion 11 may be easily removed by tearing along the score lines 12, leaving thezipper structure 20a fully exposed and easily accessible for the use desired. - The above noted process and mechanism may also be performed so that the
zipper assembly 20 is located along one of thelong sides bag 100 rather than the short side of the rectangle, which is defined by thebag 100. - Referring to
Figure 5 , a second embodiment of thepresent invention 1 is illustrated. As may be seen fromFigure 5 twobags 100 are shown prior to their being separated alongseam 101. This embodiment includesscore lines 12 laid out in an alternative pattern that includes curve orarcuate section 13 and tearnotch 24. As further disclosed inFigure 7 theparent film 10 is sealed atsection 26 to either its opposingsides zipper assembly 20. Thetear notch 24 provides a starting point for removing thefold structure 11, which is located above thezipper assembly 20. Thefold structure 11 being defined by the location of the score lines 12. The score lines 12 extending alongcurve 13 to a predetermined area below thezipper assembly 20 for substantially the entire width of thereclosable bag 100 facilitating removal of the hood or foldstructure 11 and exposure of thezipper structure 20a. The embodiment ofFigure 5 further including ahermetic seal 40. - Referring now to
Figure 8 , a cross-sectional view of the embodiment ofFigure 7 may be seen. In particular, theintegral skirt 16, usually comprised of two strips on pieces of plastic film or a one-piece unit of continuous film, may be seen to have itsoutside surface 19 sealed hermetically to theinside surfaces hermetic seals peelable seal 50 is located at the bottom of theskirt 16. Any standard commercially known resealable adhesive 51 may be used to make thepeel seal 50. Thepeel seal 50 may also be ahermetic seal 40b. - Referring now to
Figure 9 an alternative to the embodiment ofFigure 8 is shown. In this embodiment thezipper skirt 16 is heat sealed to theside panels parent film 10. The inside surfaces 17 of thezipper skirt 16 are peelable sealed to one another, using a known releasable adhesive 51, to provide a releasable hermetic or gastight seal 50 therebetween. It should be noted that the terms resealable adhesive or releasable adhesive as used herein should be construed interchangeably as well as given their common meaning. - Referring now to
Figure 10 another alternative embodiment ofFigure 8 is shown. In this embodiment theparent film 10 is sealed along apredetermined portion 42 ofinside surface peelable seal 50 betweeninside surfaces predetermined portion 42.US Patent No. 4,944,409 contains an example of such an adhesive. Presently, CUREX brand grade 4482-0, supplied by Curwood of Oshkosh, Wisconsin is considered an acceptable adhesive for use with this embodiment of the present invention. - Referring now to
Figures 11 and12 another alternative embodiment is illustrated wherein thepeelable seal 50 is comprised of apeel seal tape 53 having a permanent sealant like a metallocene catalyzed polyethylene located on one side and a releasable seal material like the aforesaid CUREX brand material on the other side (side 54). - One possible method for achieving the structure of
Figure 11 and12 is the use of a form fill and seal machine system in which thepeel seal tape 53 would be tacked onto a predetermined location of theparent film 10 prior to theplow 200. (SeeFigures 31 ,33 , and34 for a general illustration of the location of theplow 200 in relationship to the other components of a form fill and seal machine. Please note with reference toFigure 33 that it is presently believed preferable forheat sealer bar 208 to be enlarged sufficiently so that in addition to sealing thetear tape 120 is place it also seals the permanent seal side of thepeal seal tape 53 in place at the same time. Accordingly, while onesealer bar 208 is believed preferable for these separate functions multiple bars could be used, each having a dedicated function or a combination of functions). After theplow 200 thepeelable sealant side 54 would be sealed to theparent film 10 by heat sealer bars 55. Use of sealer bars 208 and 55 as disclosed herein allows independent temperatures and pressures to be used for each seal and it is believed that more consistent peel seals will result. - Additionally, the
zipper skirt 16 may be sealed in place subsequent to theplow 200 bysealer bar 56 and theheader seal 206a may be made bysealer bar 57 as illustrated generally inFigures 34 and36 . - Referring now to
Figure 13 another alternative embodiment ofFigure 10 is shown. In this embodiment, thezipper skirt 16 includes anelongated section 16a.End 21 ofelongated section 16a is positioned between theinside surfaces side panels parent film 10. Theelongated section 16a is heat sealed to theparent film 10 oninside surface 35a and peelable sealed using a known releasable adhesive 51 toinside surface 36a to formpeel seal 50. - Referring now to
Figure 14 a third embodiment of the present invention is disclosed. Again, twobags 100 are shown prior to their being separated alongseam 101. The invention of the third embodiment is comprised ofparent film 10, which is used to form thebag 100 that is to be filled. Thebag 100 includes afirst side seal 30, asecond side seal 32, and afill opening 33.Side panel 35 forms the front side of thebag 100. Thefill opening 33, after thebag 100 is formed and filled with a predetermined type of food material, is heat sealed to form bottom edge orseal 34. Thebag 100 further includes afold structure 11,header 15,integral zipper skirt 16, azipper assembly 20 including azipper structure 20a, at least onehermetic seal 40, an unsealedarea 60, and asection 62 where thezipper skirt 16 and theends 23 of thezipper assembly 20 are heat sealed together (see sealedmass 23b inFigure 14 ) prior to their insertion between thefront side 35 and theback side 36 of thefilm 10. This forms sealedmass 23b. The formation of sealedmass 23b may take place atsealer 216, which is illustrated inFigure 30 . - Sealing zipper skirt(s) 16 to the
parent film 10 forms the hermetic or gastight seal 40. The zipper skirts 16 may have a predetermined portion or portions that extendpast seal 40 and which may be held together with apeel seal 50. See for example,Figure 15 . - Since, within the unsealed
area 60, theside panels zipper assembly 20, the hood structure 11 (which may be defined by the score lines 12) may be easily removed to exposezipper structure 20a. The sealedmass 23b provides for containment of product when thepeelable seal 50 is opened. - Referring to
Figure 15 a view fromline 15--15 ofFigure 14 may be seen. This may be seen to be identical to the embodiment ofFigure 8 , except as explained above with reference toFigure 14 . - Referring now to
Figure 16 an alternative structure to the one shown inFigure 15 may be seen. In this alternative, thezipper skirt 16 is made of one piece of material. It is heat sealed to theinside surfaces hermetic seals skirt 16 is provided with astructural weakness 45 which extends linearly and generally parallel tohermetic seals zipper skirt 16. Thestructural weakness 45 is designed to fracture or tear relatively easily when the customer opens thebag 100. - Referring now to
Figure 17 , an alternative to the embodiment shown inFigure 16 may be seen. In this embodiment thezipper skirt 16 includes abarrier film section 16b. Thebarrier film 16b is applied (preferably by heat sealing although other methods could be used, e.g., Adhesive coupling, ultrasonic or high frequency sealing technology) to theinside surface 16d of thezipper skirt 16. Thezipper skirt 16 is heat sealed along a predetermined portion of itsoutside surface 16e toparent film 10 to form ahermetic seal 40. Thebarrier film section 16b is releasably sealed to theinside surface 16d to form at least onepeel type seal 50. Note that it is presently believed thatsection 16b must have a surface 16c that is resistant to heat sealing. - Referring now to
Figure 18 an alternative to the embodiment shown inFigure 17 may be seen. In this embodimentbarrier film section 16b is heat sealed to a separate predetermined portion of theinside surfaces parent film 10. To form two additionalhermetic seals 40 located below thehermetic seals 40 of thezipper skirt 16. Thebarrier film 16b is provided with a structural weakness at 45 which extends linearly and generally parallel tohermetic seals 40. The structural weakness is designed to fracture or tear relatively easily when the customer opens thebag 100. - Alternatively, the structure of
Figure 17 could be provided with astructural weakness 45 as described with reference toFigure 18 . In such acase peel seal 50 would be replaced with a permanent seal. - Referring to
Figures 19 and20 ,header strip 206, located between thefront side 35 and backside 36 of theparent film material 10, of a predetermined size have sufficient width to extend down to, preferably just above, a tear line 132 (area of structural weakness). Theheader strip 206 terminates at edge(s) 131. Thistear line 132 has the predetermined propensity to tear in predetermined way. The extension of theheader strip material 206 extends down so that it is adjacent to thetear line 132. This facilitates tearing off thehood structure 11 from thebag 100 along thetear line 132. Theoptional tear notch 134 facilitates initiation of the tear, the tear line 132 (the orientedparent film 10 orfilm 10 with the propensity to tear) directs the tear, and theheader material 206, which is bonded or sealed to thefront side 35 and backside 36 of theparent film 10, controls the tear so that thezipper structure 20a is consistently clear of theparent film material 10 after the removal of thehood structure 11. - Alternatively, if the
header material 206 is made of an oriented polypropylene having at least one side with a heat sealable sealant then theparent film 10 would not need to be oriented or have thetear line 132 or propensity to tear. Presently, it is believed preferable that if theheader material 206 is made of an oriented polypropylene then the oriented polypropylene should have both its sides coated with a heat sealable sealant. Also, alternatively, a plurality of header strips 206 could be used instead of a singleintegral header strip 206. In either case, theparent film 10 would not necessarily need to be oriented or have atear line 132 or a propensity to tear. - Referring to
Figures 21 and22 , at least one but preferably two pieces oftear tape 120, located between thefront side 35 and backside 36 of theparent film material 10 onfilm surfaces parent film 10 of thehood structure 11 adjacent, preferably just above, a tear line 132 (area of structural weakness). Thistear line 132 has the predetermined propensity to tear in predetermined way. Thetear tape material 120 adjacent thetear line 132 facilitates tearing off thehood structure 11 from thebag 100 along thetear line 132 in a controlled manner. Theoptional tear notch 134 facilitates initiation of the tear, the tear line 132 (the oriented parent film or film with the propensity to tear) directs the tear, and thetear tape 120, which is bonded or sealed to thefront side 35 and backside 36 of theparent film 10, controls the tear so that thezipper structure 20a is consistently clear of theparent film material 10 after the removal of thehood structure 11. Alternatively, if thetear tape material 120 is made of an oriented polypropylene having at least one side with a heat sealable sealant then theparent film 10 would not necessarily need to be oriented or have thetear line 132 or propensity to tear. - With respect to facilitating removal of hood or fold 11 it should be understood that instead of
score lines 12 theparent film 10 may be weakened in predetermined areas using other procedures as well, including but not limited to scoring or the use of multiply laminate film having a predetermined weakened area or the addition of a tear assistance structure, e.g.,Tear tape 120 ortear string 120a. The tear assistance structure may be added for use by itself or in conjunction with a predetermined area ofstructural weakness 12 to aid in the tearing of thefilm 10. SeeFigures 28 and29 . - Referring to
Figure 23 another alternative to the embodiment disclosed inFigure 22 is disclosed. In thisembodiment tear tape 120 is applied to both theinside surfaces outside surfaces bag 100. In this embodiment no score line or weakening 132 is believed necessary (although such an area of structural weakness could be used) since thetear tape 120 located on both the inside and outside surfaces of thebag 100 will act as an effective tear guide. - Referring to
Figures 24, 25, and 26 another alternative to the embodiment shown inFigure 22 is illustrated. In this embodiment a modifiedtear tape 120b having atear bead 120c is used. - As
Figures 24-26 illustrate, when thefilm 10 is sealed to thetear tape 120b thebead 120c is depressed into thefilm 10 creating an area ofstructural weakness 12 without requiring pre-scoring or other modification of theparent film 10 prior to the application of thetear tape 120b. This structure is believed beneficial because thetear tape 120b is always in alignment with the area ofstructural weakness 12. - Referring to
Figure 27 another alternative to the embodiment disclosed inFigure 22 is disclosed. In thisembodiment tear tape 120 is applied to both theinside surfaces outside surfaces bag 100. Thetear tape 120 is applied to border both sides of the score line orweakening 132. Since thetear tape 120 is located on both sides of thescore line 132 and on the inside and outside surfaces of the bag 100 a very consistent controlled or guided will be achieved. -
Tear tape 120 is interchangeable withtear string 120a. Accordingly, atear string 120a could be substituted for thetear tape 120. See, e.g.,Figures 38 and39 . Preferably, thetear tape 120 or thetear string 120a used is made from a material, e.g., Thermoplastic material, that is compatible with thefilm 10 and which may be sealed, coupled, or bonded to thefilm 10. For example, thetear tape 120 ortear string 120a may be formed of polyethylene or may be encased in polyethylene. It is understood in the art that a tear string, such astear string 120a, may have various cross-sectional shapes, e.g., Round, square, triangular, etc., which may be used to enhance its ability to tear theparent film material 10. - In particular, referring to
Figures 30 ,32 , and35 , the process by which the alternative embodiment havingtear tape 120 is presently believed to be manufacturable is illustrated using anrpm 100 machine. Theparent film 10 is fed over a predetermined number of rollers and toward theplow structure 200. Theparent film 10 after passing overdancer roller 203a is die punched bydie 210 to presentparallel openings 121. It is presently believed that thefilm 10 must pass over thedancer rollers 203a so that they are kept sufficiently taut thus allowingopenings 121 to be punched out accurately at predetermined positions, bydie 210, such that the positions of theopenings 121 are always at the same or a uniform distance from each other. In addition to theparent film 10 two rolls oftear tape 120 are fed over theparent film 10 and in parallel alignment with theparallel openings 121 such that thetear tape 120 preferably, but not necessarily, bisects each theparallel opening 121.Tear string 120a could be substituted fortear tape 120. See, e.g.,Figures 38 and39 . - In addition, referring back to
Figures 30 ,32 , and35 , optionally aheader material 206 may be fed over theparent film 10. Further, the zipper orslider assembly 20 is also fed over theparent film 10. Prior to being fed over theparent film 10 thezipper assembly 20 has anotch 22a die punched, bydie 214 and heat sealed bysealer 216, at a predetermined position that is also designed to be in general alignment with theparallel openings 121. Once thetear tape 120 is presented over theparent film 10 but before it is passed over theplow 200 it passes over a teartape sealer mechanism 208 so that thetear tape 120 is sealed to theparent film 10. Alternatively, thetear tape 120 could be tacked in place and subsequently sealed to theparent film 10 either before or after theplow 200. - The
parallel openings 121 may be of any shape although circular is the shape that is presently preferred. Diamond shaped cuts could be used to further enhance initiation of the tear in theparent film 10. SeeFigure 37 . - Additionally, the
notch 22a as generally illustrated herein may be of an arcuate or radiused shape but thenotch 22a could also be made at a sharp angle such as a 90° angle. SeeFigure 37 . The sharper angle is presently believed to add more stress to the structure of thezipper assembly 20 and therefore a radiused structure is presently considered to be preferred. However, the present invention should not be interpreted as being limited to solely aradiused notch 22a as generally illustrated herein. - After the
parent film 10 is folded the remaining manufacturing process is carried out as generally illustrated inFigure 35 . The zipper skirts 16 are sealed to the respective sides of theparent film 10 atseal 14. Theheader strip 206, if used, is sealed to theparent film 10 atseal 206a. Theside seal 30a is made, which also seals the perimeter oredge 121a ofopening 121. (note, if notear tape 120 ortear string 120a is used then it is presently considered best to add atear notch 24 to theopening 121 to facilitate removal of thehood 11.) Anopening 123 is die punched in thepackage 100 to provide a point where thepackage 100 may be easily hung for display purposes. Thepackage 100 is then cut alongseam 101 from the V-fold portion of the form fill and seal machine and transferred to the fill and seal stations wherefill opening 33 is opened and thepackage 100 is filled and gas is flushed through thefill opening 33.Opening 33 is then hermetically sealed atseal 34a. - Alternatively, referring to
Figure 38 andFigure 39 thezipper assembly 20 may be introduced subsequent to theplow structure 200. Theparent film 10, prior to being fed over therollers 202 is still die punched bydie 210 to presentparallel openings 121. Also, alternatively, thetear tape 120 ortear string 120a may be feed over theparent film 10 and in parallel alignment with theparallel openings 121 subsequent to theplow 200. SeeFigures 38 and39 . Again, thetear tape 120 ortear string 120a preferably, but not necessarily, bisects eachparallel opening 121. Also, whileFigure 39 shows both thetear string 120a and skirts 16 of thezipper assembly 20 being introduced to theparent film 10 subsequent to theplow 200 and respectively sealed bysealer bars tear string 120a or thezipper assembly 20 could be introduced before theplow 200. For example, thezipper assembly 20 could be introduced after theplow 200 and thetear string 120a prior to theplow 200. Sincetear tape 120 is interchangeable with thetear string 120a it will be apparent to a person of ordinary skill in the art reading this disclosure that thetear tape 120 could also be introduced after theplow 200 and used in essentially the same manner as thetear string 120a. - The
openings 121 are provided, at a minimum, to facilitate access to thetear tape 120 or thetear string 120a and to facilitate tearing and removal of thehood 11 to expose thezipper assembly 20. - Additionally, the present invention may be used in combination with other VFFS and HFFS machines. The present invention could also be used with HFW machines. However, in using either VFFS machines or HFFS machines the method of the present invention is presently believed to require post-compression (commonly called post-squashing) of a predetermined portion of the
track structures 20b, with respect to the embodiment shown inFigure 6 . (sometimes also referred to astrack mass 20b, herein) of theslider closure assembly 20 located within a margin orline 10b of theparent film 10 where aseal 30a, especially a hermetic seal, is desired. Alternatively, thetrack mass 20b may have a precompressed portion located withmargin 10b. Neither pre-compression nor post-compression are believed to be required where a notch, e.g., 22a ofFigure 7 , has been punched out or cut from thezipper assembly 20. However, if pre-compression is desired then this is accomplished in the present invention atsealer 216 shown inFigure 30 . This is so that when, on either a HFFS or VFFS machine, thetrack mass 20b (with the slider orzipper structure 20a avoided) passes through the package side seal zone portion of either the machine a consistenthermetic seal 30a is produced by the application of the heater bars of the machine used. As will be apparent to a person of ordinary skill in the art from this disclosure, if a notch, e.g.,notch 22a ofFigure 7 , is cut from thezipper assembly 20 then there is no structure or mass forsealer 216 to pre-compress andsealer 216 will then only provideseal 22b of thecut end 22, as shown inFigure 7 . - In applications using HFW machines for the manufacture of the embodiment shown in
Figure 5 , such as Jones Automation Company machines, it is not believed necessary to pre-compress, post-compress, or squash a predetermined portion of thetrack mass 20b. HFW machines have a rotary jaw assembly, which includes a hinged side. The jaw assembly provides at least two advantages, either of which, separately or in combination, eliminates the need for pre-compression of thetrack mass 20b. First, the jaw assembly provides a relatively long time, longer than the time provided by either VFFS or HFFS machines, for the application of heat and pressure sufficient to form the desiredseal 30a. Second, the portion of thetrack mass 20b that is targeted to be fused or sealed (generally located within the boundary ofmargin 10b) is placed or fed into the jaw assembly so that it is placed toward and near the hinged portion of the jaw assembly and thus maximum mechanical advantage and force may be applied to the predetermined portion of thetrack mass 20b. - If either the longer seal time or the mechanical advantage of the jaw assembly of the HFW machine was not available then, referring to
Figure 6 , since there is generally insufficient room on an HFW machine to pre-compress thetrack mass 20b, thetrack mass 20b may be pre-punched with a die at thepredetermined location 22a (where theseal 30a is also to be applied or created) prior to insertion into thefold 11 of theparent film 10. Since the pre-punched area ornotch 22a would be synchronized to be in registration with the portion of the foldedparent film 10 that is to be sealed, less energy (time, temperature, and/or pressure), due to the reduced mass to be sealed is required to consistently obtain the type ofseal 30a desired. (note, pre-punching rather than pre-compression could also be used with HFFS or VFFS machines.) - Referring now to
Figures 40 ,40a ,41 and 41a , an alternative, not according to the invention, may be seen. Thefilm 10 is folded over, as shown, to form thefold structure 11, and azipper assembly 20 is positioned over thefold structure 11. Weakenedareas 12 are preferably positioned below thezipper structure 20a, so that when thezipper structure 20a is in the open position thefold structure 11 and its weakenedareas 12 are exposed to allow the user access to thefold structure 11. Seen particularly inFigure 41 , the overlayingzipper skirt 16, of the alternate embodiment may be viewed.Zipper skirt 16 is usually comprised of two strips of pieces of plastic film or a one-piece unit of continuous film, and is seen to have itsinside surfaces 17 sealed hermetically to theoutside surfaces film 10 at respectivehermetic seals fold structure 11 is preferably designed to act as an imperforate hermetic barrier to protect the contents ofbag 100. Tearing thefold structure 11 allows the user access to the contents and also provides visual evidence that the hermetic seal is broken. Seen particularly inFigures 40a and41 , theinside surfaces parent film 10 may also be peelably sealed to one another, using a known releasable adhesive 51, to provide a releasable hermetic or gastight seal 50 therebetween. Theseal 50 is located adjacent, perferably just below, the weakenedareas 12. - As best seen in
Figures 40 and40a , twobags 100 are shown prior to their being separated alongseam 101. The alternate embodiment seen in these views is comprised ofparent film 10, which is used to form thebag 100 to be filled. Thebag 100 further includes aheader 15, and apeg hole 15a, seen in this embodiment at the end opposite thefold 11. It is presently believed preferable, after the folding and sealing ofparent film 10 that theparent film 10 be punched out to form atear area 24a. The parent film is then sealed around the perimeter of the punched outtear area 24a and atear notch 24 is added, as seen inFigure 40 . These steps are preferably performed before the attachment of thezipper assembly 20 and zipper skirt(s) 16. Following this, thezipper assembly 20 is positioned and bonded to theoutside surfaces parent film 10, and over thefold 11. Alternately, theparent film 10 may be sealed around the perimeter to include the sealed perimeter of the punched outtear area 24a so that after the punching step which forms teararea 24a, the sealed perimeter remains. Thetear notch 24 provides a starting point for removing thefold structure 11, which is surrounded by thezipper assembly 20 and attachedzipper skirt 16. Further, at least one piece oftear tape 120, located between thefront side 35 and backside 36 of theparent film 10 onfilm surfaces parent film 10 at thefold 11. Thetear tape 120 is located adjacent, preferably just above, a tear line 132 (area of structural weakness). Thistear line 132 has the predetermined propensity to tear in a predetermined way. Thetear tape material 120 adjacent thetear line 132 facilitates tearing off thefold structure 11 from thebag 100. Theaforementioned tear notch 24 facilitated initiation of the tear. - Referring to
Figures 41 and 41a , the skirt(s) 16 remain intact so that thezipper assembly 20 is kept continuous for ease of handling. Once positioned over the punchedfold structure 11, the skirt(s) 16 of thezipper assembly 20 is bonded to theoutside surfaces parent film 10 at seal location(s) 40c, 40d. Next, sides 30 and 32 are sealed, alongmargin 10c illustrated inFigure 40 , using a known mechanism such as a heatsealing bar of a form fill and seal machine (as described earlier in the present application) by advancing thefilm 10 to the heat sealing bar portion of the machine to be used. - It will be apparent to the person of ordinary skill in the art after reading this disclosure that the present alternative embodiment shown in
Figures 40 ,40a , and41, 41a may be manufactured using the methodology previously disclosed herein with the necessary modifications, which this specification makes apparent to a person of skill in the art. - With reference to
Figures 42 - 45a , an alternative embodiment reclosable bag 100' including agusseted portion 310 and side fill opening 300 is shown. - The gusseted, reclosable bag 100' includes at least one sheet of
web material 10 having at least two areas ofstructural weakness 12. The areas ofstructural weakness 12 may be micro perforations, scoring or any other structural weakness that will allow facile tearing of theweb material 10. The weakenedareas 12 define an integral tear off portion or foldstructure 11. The gusseted, reclosable bag 100' is further defined by agusseted portion 310 and asealable fill opening 300. Thesealable fill opening 300 is located generally between thefold structure 11 andgusseted portion 310. A backing orbarrier strip 320 is inserted between the zipper skirts 16. The backing orbarrier strip 320 is preferably two-ply material and may be composed of laminent film such as Curwood's 7182 barrier film. A first orinner side 328, may be composed of Nylon, polypropylene, or any other suitable material that will not bond to theparent film 10 during sealing. A second orouter side 329 of thestrip 320 may be provided with a sealant, such as a polyethylene, polyethylene blend, or a polyethylene co-extrusion. The backing orbarrier strip 320 is preferably notched at 326 and 326a (best seen inFigure 47 ) to allow proper sealing ofside seal 30a. Azipper assembly 20 having attached zipper skirts 16 is inserted in thefold structure 11. When thezipper assembly 20 and skirt(s) 16 are bonded to theinside surface 36a ofparent film 10 at 14, the innerresistant side 328 ofstrip 320 prevents the skirt(s) 16 from sealing together along their respectiveinner surface 17, seen particularly inFigure 45 . Theskirts 16 are bonded at 14 to the inside surface of theparent film 10. - As may be seen from
Figure 42 , two bags 100' are shown prior to their being separated alongseam 101. This embodiment includesscore lines 12 laid out in a pattern that includes atear notch 24. Thetear notch 24 provides a starting point for removing thefold structure 11, which is located above thezipper assembly 20. Theparent film 10 is sealed atsection 26 to either its opposingsides zipper assembly 20. For ease of illustration, it is to be noted thatseal 30a extends acrossnotches strip 320 andarea 26a refers to the general area of thehermetic side seal 30a adjacent thenotches zipper assembly 20 for substantially the entire width of the reclosable gusseted bag 100', facilitating removal of thefold structure 11 and exposure of thezipper structure 20a. The embodiment ofFigure 42 further includes asealable fill opening 300 located below the zipper assembly and above thebottom gusset 310. - Referring now to
Figures 43 and 44 , a cross-sectional view of the embodiment ofFigure 42 may be seen. In particular, the backing orbarrier strip 320 is seen with anupper portion 324 thereof attached to theinside surface 17 of thezipper skirt 16. As may be further seen, alower portion 322 of thebarrier strip 320 is attached to the inside surface 32a of the bag 100' at a point just below thefill opening 300. As illustrated particularly inFigure 44 , thelower portion 322 is seen prior to attachment to inside surface 32a, with thefill opening 300 in the open position. For illustration purposes, when opening 300 is shown in the closed position the web edges 400 are seen as not completely abutting. It is to be understood that while it is preferred that theedges 400 abut, it is within the scope of the present invention to include aclosed opening 300 wherein the web edges 400 are not completely abutted. - Referring to
Figure 45 , thefilm 10 is folded over, as shown to form thefold structure 11 and azipper assembly 20 is inserted. Weakenedareas 12 are preferably positioned below thezipper structure 20a so that when thefold structure 11 is removed, thezipper structure 20a is exposed sufficiently above the resultingfin structures 19 to allow the user access to thezipper structure 20a. Zipper skirts 16 are shown bonded to thefilm 10. However, it is presently believed preferable, prior to insertion of thezipper assembly 20, that the uncut ends (not seen in these views) of eachzipper assembly 20 be punched out or cut to form aradiused notch 22a, as shown inFigure 42 . As seen inFigure 45 , anupper portion 324 of a backing orbarrier strip 320 is attached to theinside surface 17 of one of the zipper skirts 16. Alower portion 322 of thestrip 320 extends beyond thedistal margin 342 of thezipper skirt 16 and is bonded to theinside surface 36a ofside 36. It is presently believed preferable, prior to attachment to thezipper skirt 16, that the backing orbarrier strip 320 be punched out or cut to form notch 326 (seen inFigure 47 ). As may be further seen inFigure 47 ,barrier strip 320 is further punched prior to insertion intofold structure 11, to formnotch 326a, also in register withside seal 30a.Notches radiused notch 22a ofzipper assembly 20, all of which are positioned to be in register withside seal 30a, seen inFigures 42 and48 .Consecutive notches barrier strip 320 alleviate the presence ofbarrier strip 320 atside seal 30a, thus facilitating a hermetic seal atarea 26a (best seen inFigure 42 ). The hermetic seal is obtained by sealing inside opposingsurfaces inside surface 10a ofparent film 10 is simultaneously sealed to the zipper skirts 16 atarea 14, as seen inFigure 45 , and simultaneously, inside surfaces 17 of skirts 16 (Figure 45 ) are sealed to each other in the notched outareas Figure 42 ). - As illustrated in
Figures 45 and47 , the skirt(s) 16 remain intact so that thezipper assembly 20 is kept continuous for ease of handling. Once inserted, the skirt(s) of thezipper assembly 20 is bonded to theinside surface 10a of theparent film 10 at seal location(s) 14. - Referring to
Figures 46 ,47 , and48 , the process by which the alternative embodiment gusseted, side fill bag 100' (seen inFigures 42 - 45 ) is presently believed to be manufacturable is illustrated using anrpm 100 machine. Theparent film 10 is fed over a predetermined number of rollers and toward thetrapezoidal plow structure 200a. In addition to theparent film 10, thezipper assembly 20 andbacking strip 320 are fed over theparent film 10. It is presently believed that thezipper assembly 20 andbacking strip 320 must pass over thedancer rollers 203a so that they are kept sufficiently taut thus allowingnotches notches backing strip 320 is inserted between zipper skirts 16. Prior to being fed over theparent film 10, thezipper assembly 20 has anotch 22a die punched, by die 214' and heat sealed by sealer 216', at a predetermined position atseal 22b that is also designed to be in general alignment with thenotch 326 instrip 320, formed by die 214'' and 326a formed by die 214'. It is to be noted thatnotch 326 is preferably formed such that thedistal margin 342 ofskirt 16 extends into thenotch 326. This configuration allowsnotch 326a to be formed by die 214' with minimal chance ofskirt 16 being inadvertently notched by die 214'. Die 214' simultaneously formsnotches parent film 10 is folded over thezipper assembly 20 to form thefold structure 11. Before theparent film 10 is passed over thetrapezoidal plow 200a it passes over azipper sealer mechanism 216 whereby the zipper skirts 16 are sealed to theparent film 10 at theinside surfaces sides skirts 16 is needed during sealing since, as seen inFigure 45 , theinner side 328 ofstrip 320 will not seal to theinside surface 17 ofopposite zipper skirt 16. Further, gusset holes 344 are die punched bydie 344a at a predetermined position designed to be in general alignment withside seal 30a. The gusset holes 344 allow gusset folds to be attached to each other atside seal 30a thereby adding rigidity to thegusset portion 310 of the gusseted bag 100'. This added rigidity enables the gusseted bag 100' to stand up by itself when placed on a flat surface such as a table or refrigerator shelf (not seen in these views). Further, with reference to the prior artgusseted bags 460 seen inFigure 57 ,additional seals 470 may be included for additional rigidity and containment as would be desired with liquid products. - In addition, referring to
Figures 46 and47 , optionally aheader material 206 may be fed over theparent film 10. Theheader strip 206, if used, is sealed to theparent film 10 atseal 206a, seen particularly inFigure 47 . As seen inFigure 46 ,seal 206a is formed byheat sealer 216.Heat sealer 216 simultaneously seals the zipper skirt(a) 16 to theparent film 10 at 14. Theparent film 10, attached zipper assembly20, andstrip 320 are passed overroller 350. After theparent film 10 is folded and thezipper assembly 20 is inserted, the remaining manufacturing process is carried out as generally illustrated inFigure 48 . Theparent film 10 and attachedzipper assembly 20 passes over a trapezoidal folding board or plow 200a. The folding step leaves a flat bottom prior to theparent film 10 being passed over a tuckingboard 334. The tuckingboard 334 reverse folds the previously formed flat bottom of theparent film 10 into agusset 310. Theside seal 30a is made. It is to be noted that thebarrier strip 320 preferably marginally enters the area ofside seal 30a atseal area 26a.Notches barrier strip 320 in theseal 30a area to providehermetic seal 30a. Although it is preferred that thebarrier strip 320 minimally enter theside seal 30a area atseal area 26a, it is within the province of the present invention to provide abarrier strip 320 which ends before, at, or beyond theside seal 30a area. Further, it is to be understood that the present invention may be practiced using abarrier strip 320 having longitudinally-spaced sealable areas whereby thenotches seal area 30a. Tearnotch 24 is added to facilitate removal of thefold 11. Anopening 123 is die punched in the package 100' to provide a point where the package 100' may be easily hung for display purposes. The package 100' is then cut alongseam 101 from the bag making portion of the form fill and seal machine and transferred to the fill and seal stations where theside fill opening 300 is opened and the package 100' is filled throughside fill opening 300. Theopening 300, seen inFigure 48 , is then hermetically sealed atseal 340, as seen inFigure 48 . - The presence of the backing or
barrier strip 320 permits theseal 340 to be formed while the inside surfaces 17 of zipper skirts 16 are not sealed to one another (seeFigure 45 ). As previously described with reference toFigures 42-45 , theinner side 328 ofstrip 320 will not seal toinside surface 35a orzipper skirt 16 during sealing, thus permitting a seal without the need for a blade between theskirts 16. - Referring now to
Figures 49-52 , an alternative gusseted, side fill bag 100' is illustrated, which does not fall under the scope of the invention. - As may be seen, a press-to-close zipper assembly 20' having lower skirt (s) 16 and
upper skirts 16a may be inserted in thefold structure 11. As in the embodiment shown inFigures 42-45a , the gusseted, reclosable bag 100' with press-to-close zipper assembly 20' seen inFigures 49-52 includes at least one sheet ofweb material 10 having at least two areas ofstructural weakness 12. - The weakened
areas 12 define an integral tear off portion or foldstructure 11. The gusseted, reclosable bag 100' is further defined by agusseted portion 310 and asealable fill opening 300 which is located between thefold structure 11 andgusseted portion 310. As best seen inFigure 52 , the press-to-close zipper assembly 20' typically includes amale track structure 330 and afemale track structure 331. Themale track structure 330 and thefemale track structure 331 each include anupper zipper skirt 16a of web material extending therefrom and alower zipper skirt 16 extending therefrom. Eachzipper skirt parent film 10 at sealinglocation 14. - As may be further seen in
Figure 52 , the zipper skirt(s) 16 is heat sealed to theinside surface parent film 10. A backing orbarrier strip 320 is located between, and extends below the zipper skirts 16. As discussed with reference to the embodiment shown inFigures 42 - 45 , the backing orbarrier strip 320 is preferably two-ply and composed of a laminate film such as Curwood's 7182 barrier film. As such, the strip includes afirst side 328 and asecond side 329. Thefirst side 328 is preferably composed of Nylon, polypropylene, or any other substance known in the art that will not bond to thezipper skirt 16 orparent film 10 during heat sealing. Thesecond side 329 may be provided with a sealant, such as a polyethylene, polyethylene blend, or a polyethylene co-extrusion. The second orsealant side 329 of thestrip 320 is sealed or tacked to theinside surface 17 of azipper skirt 16 prior to insertion in thefold structure 11 at a location adjacent the sealable side fill opening 300 atseal 335. The inner,resistant side 328 ofstrip 320 prevents the skirt(s) 16 from sealing together along their respectiveinner surface 17 during sealing of theside fill opening 300. The backing orbarrier strip 320 is preferably notched at 326 and 326a, as seen inFigure 54 , to allow proper sealing ofside seal 30a. - As may be seen from
Figure 49 , two bags 100' having press-to-close zipper assembly 20' are shown prior to their being separated alongseam 101. The score lines 12 are seen to be laid out in a portion that includes atear notch 24. Thetear notch 24 provides a starting point for removing thefold structure 11, which is located above the press-to-close zipper assembly 20'. Thefold structure 11 being defined by the location of the score lines 12. Theparent film 10 is sealed atarea 26a to either its opposingsides seal 30a extends down across notches 326,326a instrip 320.Reference numeral 26a refers to this general area ofhermetic side seal 30a. The alternative seen inFigure 49 further includes asealable fill opening 300 located below thefold structure 11 and above thebottom gusset 310. - Referring now to
Figures 50 and 51 , a cross sectional view of the alternative ofFigure 49 may be seen. The backing orbarrier strip 320 is particularly seen, with theupper portion 324 thereof attached to theinside surface 17 ofzipper skirt 16. Thelower portion 322 of thebarrier strip 320 is attached to theinside surface 36a of theparent film 10 at a point below thefill opening 300. As illustrated particularly inFigure 51 , thelower portion 322 is seen prior to attachment toinside surface 36a, with thefill opening 300 in the open position. For illustration purposes, when opening 300 is shown in the closed position, as inFigure 52 , for example, web edges 400 are seen as not completely abutting. It is to be understood that while it is preferred that web edges 400 completely abut when opening 300 is in the closed and sealed position, it is further possible to include aclosed opening 300 having non-abutting web edges 400. - Referring now to
Figures 53-55a , the process by which the alternative, gusseted, side fill bag 100' (seen inFigures 49-52 ) is illustrated. Seen particularly inFigure 54 , a press-to-close zipper assembly 201 may be introduced prior to thetrapezoidal plow structure 200a. Theparent film 10 is fed over a predetermined number of rollers and toward theplow 200a. - The press-to-close zipper assembly 20' and
backing strip 320 are fed over theparent film 10. It is presently believed that the press-to-close zipper assembly 20' andbacking strip 320 must pass over thedancer rollers 203a so that they are kept sufficiently taut to allownotches notches backing strip 320 is inserted between zipper skirts 16. As seen inFigure 54 ,notch 326 is punched out prior to insertion of thestrip 320 between skirt (s) 16, whereasnotch 326a is punched out prior to insertion of press-to-close zipper assembly 20' intofold structure 11. It may be further seen thatnotch 326 is preferably formed such that thedistal margin 342 ofskirt 16 extends into thenotch 326. This configuration allowsnotch 326a to be formed by die 214' while preventingskirt 16 from inadvertent notching by die 214'.Die 214"punches notch 326.Figure 55a illustrates the position ofnotches backing strip 320 anddistal margin 342 of zipper skirts 16. The press-to-close zipper assembly 20' is heat sealed bysealer 216 to strip 320 atseal 335. - The
parent film 10 is folded over the press-to-close zipper assembly 20' to form thefold structure 11. - As seen in
Figure 53 , prior to being passed over thetrapezoidal plow 200a, theparent film 10 it passes over azipper sealer mechanism 216 whereby the zipper skirts 16 are sealed to theparent film 10 at theinside surfaces sides Figure 53 , the press-to-close zipper assembly 20' andbacking strip 320 further passes over ablade 450 which allows theskirts web 10 while preventing theinner surfaces 17 of theskirts die 344a at a predetermined position designed to be in general alignment withside seal 30a. The gusset holes 344 allow gusset folds to be attached to each other atside seal 30a thereby adding rigidity to thegusset portion 310 of the gusseted bag 100'. This added rigidity enables the gusseted bag 100' to stand up by itself when placed on a flat surface, such as a table or refrigerator shelf (not seen in these views). - Again referring to
Figures 53 and54 , optionally aheader material 206 may be fed over theparent film 10. Theheader strip 206, if used, is sealed to theparent film 10 atseal 206a, seen particularly inFigure 54 . After theparent film 10 is folded and the press-to-close zipper assembly 20' andstrip 320 are inserted, the remaining manufacturing process is carried out as generally illustrated inFigure 55 . Theparent film 10 with attached press-to-close zipper assembly 20' and strip 320 passes over a trapezoidal folding board or plow 200a. The folding step leaves a flat bottom prior to theparent film 10 being passed over a tuckingboard 334. As is also illustrated in the manufacturing steps of the gusseted bag 100' seen inFigures 42-45 , the tuckingboard 334 reverse folds the previously formed flat bottom of theparent film 10 into agusset 310. Theside seal 30a is made and tearnotch 24 is added to facilitate removal of thefold structure 11. It may be seen that thebarrier strip 320 preferably marginally enters the area ofside seal 30a atseal area 26a. A majority of thestrip 320 is removed bynotches barrier strip 320 minimally enter theside seal 30a area, it is to be understood that the barrier strip may end before, at, or beyond theside seal 30a atarea 26a. Anopening 123 is die punched in the package 100' to provide a point where the package 100' may be easily hung for display purposes. As seen inFigure 55 , the package 100' is then cut alongseam 101 from the bag making portion of the form fill and seal machine and transferred to the fill and seal stations where theside fill opening 300 is opened and the package 100' is filled throughside fill opening 300. Theopening 300 is then hermetically sealed atseal 340. Theseal 340 is formed without use of a blade between theskirts 16, due to the presence ofstrip 320 between theskirts 16 which prevents the inside surfaces 17 ofskirts 16 from sealing together while theopening 300 is sealed. - It is to be understood that the gusseted, side fill
bags 100 and 100' having a backing orbarrier strip 320 may alternatively include any of the features disclosed with reference to the embodiments shown inFigures 1-4 . Furthermore, although not shown in the Figures, it is within the scope of the present invention to provide a brush applied, anti-seal agent to theinside surface 17 of zipper skirts 16. A brush applied, anti-seal agent such as nitrocellulose obtained from Amantceh may thereby take the place of the barrier orbacking strip 320 and provide a non-bonding function to theinside surface 17 of the zipper skirts 16 during seal of thefill opening 300.
Claims (13)
- A reclosable bag (100) for filling with at least one food product, said reclosable bag (100) comprising:at least one sheet of web material (10) having at least one fold structure (11) that forms a hood and is located between at least two predetermined areas (12, 132) having a propensity to tear in a predetermined direction and presenting at least two sidewall structures (35, 36) having inside surfaces (35a, 36a), and an opening located generally opposite said fold structure (11); a reclosable fastener structure (20), located in said fold structure (11), including a skirt structure (16) comprising a web material extending therefrom and including opposed distal margin structures; said web material of said integral skirt structure (16) being sealed to said inside surfaces (35a, 36a) at a plurality of predetermined sealing areas, wherein the reclosable fastener structure (20) extends past said at least two predetermined tear areas (12, 132), and the reclosable fastener structure (20) includes a male track structure and a female track structure characterized in that the male and female track structures extend past said at least two predetermined tear areas (12, 132).
- The reclosable bag (100) of claim 1 further comprising a barrier web material extending between and coupled to said distal margin structures.
- The reclosable bag (100) of claim 1 wherein said reclosable bag (100) is capable of being filled with at least one food product through said opening.
- The reclosable bag (100) of claim 1 wherein said reclosable fastener structure (20) further includes a male track structure and a female track structure, said male track structure including a first fin structure of web material extending therefrom and said female track structure including a second fin structure of web material extending therefrom.
- The reclosable bag (100) of claim 1 wherein each said fin structure includes a predetermined coupling portion; said coupling portion of said first fin structure being coupled to said first panel and said coupling portion of said second fin structure being coupled to said second panel.
- A method of manufacturing a reclosable bag (100) for filling with at least one food product, said reclosable bag (100) including at least one sheet of web material having at least two predetermined tear areas (12, 132), at least one fold structure (11), and an opening located generally opposite said fold structure (11); a reclosable fastener structure (20) including at least one integral skirt structure (16) of skirt web material extending therefrom; said integral skirt structure (16) including at least one distal margin; said distal margin being coupled to said web material at, at least one location between said tear area (12, 132) and said opening; said reclosable fastener structure (20) extending past said tear areas (12, 132) and into said fold structure (11), the reclosable fastener structure including a male track structure and a female track structure, the male and female track structures extending past said tear areas (12, 132); said reclosable bag (10) capable of being filled with at least one food product, said method comprising: folding said sheet of web material along a predetermined folding area to produce said fold structure (11) which fold structure (11) is located between at least the two predetermined tear areas (12, 132); inserting said reclosable fastener structure (20) into said fold structure (11); coupling said distal margin of said integral skirt structure (16) to said web material; sealing said web material along at least two predetermined linear areas located generally perpendicular to said fold structure (11); filling said reclosable bag (10) with at least one food product through said opening; and sealing said opening.
- The method of claim 6 wherein the step of sealing said web material along at least two predetermined linear areas occurs last.
- The method of claim 6 wherein the first step is coupling at least one predetermined portion of said distal margin of said integral skirt (16) structure to at least one predetermined portion of said web material prior to folding said sheet of web material.
- The method of claim 6 wherein the first step is inserting and sealing a header material into said predetermined fold area at least prior to the step of sealing said web material along at least said two predetermined linear areas.
- The method of claim 6 wherein the first step of inserting and sealing at least one tear structure into said predetermined fold are at least prior to the step of sealing said web material along at least said two predetermined linear areas.
- The method of claim 6 wherein the first step is sealing a predetermined portion of said fold structure and forming a heading structure; said further step being subsequent to said step of folding said sheet of web material along a predetermined folding area located between said areas of structural weakness to form said fold structure.
- The method of claim 6 wherein said at least one distal margin is two distal margin structures and further comprising a barrier web material extending between and coupled to distal margin structures.
- The method of claim 6 wherein said male track structure including a first fin structure of web material extending therefrom and said female track structure including a second fin structure of web material extending therefrom.
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US431732 | 1999-11-01 | ||
US09/431,732 US6360513B1 (en) | 1999-05-11 | 1999-11-01 | Resealable bag for filling with food product(s) and method |
US47449399A | 1999-12-29 | 1999-12-29 | |
US474493 | 1999-12-29 | ||
PCT/US2000/025393 WO2001032521A1 (en) | 1999-11-01 | 2000-09-15 | A resealable bag for filling with food product(s) and method |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1263655A1 EP1263655A1 (en) | 2002-12-11 |
EP1263655A4 EP1263655A4 (en) | 2012-05-16 |
EP1263655B1 true EP1263655B1 (en) | 2014-07-02 |
Family
ID=27029179
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00965065.6A Expired - Lifetime EP1263655B1 (en) | 1999-11-01 | 2000-09-15 | A resealable bag for filling with food product(s) and method |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP1263655B1 (en) |
AU (1) | AU7584900A (en) |
CA (8) | CA2640676C (en) |
ES (1) | ES2509819T3 (en) |
MX (1) | MXPA02005252A (en) |
PT (1) | PT1263655E (en) |
WO (1) | WO2001032521A1 (en) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6467956B1 (en) * | 2000-04-05 | 2002-10-22 | Reynolds Consumer Products, Inc. | Tamper evident package having slider device, and methods |
US20020094137A1 (en) | 2001-01-16 | 2002-07-18 | Schneider John H. | Tamper evident resealable packaging |
MXPA04001653A (en) * | 2001-08-24 | 2004-11-22 | Pliant Corp | Scored tamper evident fastener tape. |
FR2832698B1 (en) * | 2001-11-28 | 2004-07-09 | Soplaril Sa | PACKAGING, TYPICALLY A BAG, WITH ORIENTED TEAR OPENING |
US6918234B2 (en) | 2002-02-21 | 2005-07-19 | Pactiv Corporation | Process for attaching slider-operated closure on form-fill-seal packaging machinery |
US20030172622A1 (en) * | 2002-03-15 | 2003-09-18 | Kraft Foods Holdings, Inc. | Apparatus for manufacturing flexible packages having slide fasteners and for filling through the slide fasteners |
EP1551248A4 (en) * | 2002-06-17 | 2009-11-25 | Illinois Tool Works | Peel seal tamper evident slider bag |
GB0226388D0 (en) * | 2002-11-13 | 2002-12-18 | Supreme Plastics Holdings Ltd | Improvements in plastic bags and like containers |
CH704109B1 (en) * | 2004-10-07 | 2012-05-31 | S2F Flexico | Bags made of paper and / or plastic. |
GB2470308B (en) * | 2008-10-07 | 2011-03-23 | Cadbury Holdings Ltd | Packaging |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3780781A (en) * | 1971-09-07 | 1973-12-25 | Seisan Nipponsha Kk | Openable bag |
US4925316A (en) * | 1986-08-11 | 1990-05-15 | Minigrip, Inc. | Reclosable bag having an outer reclosable zipper type closure and inner non-reclosable closure |
US5023122A (en) * | 1988-01-29 | 1991-06-11 | Minigrip, Inc. | Easy open bag structure |
US5417040A (en) * | 1993-09-20 | 1995-05-23 | Davoren; Gerrard A. | Method of making and filling a resealable bag |
US5660479A (en) | 1996-02-16 | 1997-08-26 | Reynolds Consumer Products Inc. | Easy open package header |
-
2000
- 2000-09-15 ES ES00965065.6T patent/ES2509819T3/en not_active Expired - Lifetime
- 2000-09-15 PT PT965065T patent/PT1263655E/en unknown
- 2000-09-15 CA CA2640676A patent/CA2640676C/en not_active Expired - Fee Related
- 2000-09-15 CA CA2640892A patent/CA2640892C/en not_active Expired - Fee Related
- 2000-09-15 CA CA2640895A patent/CA2640895C/en not_active Expired - Fee Related
- 2000-09-15 CA CA2640716A patent/CA2640716C/en not_active Expired - Fee Related
- 2000-09-15 WO PCT/US2000/025393 patent/WO2001032521A1/en active Application Filing
- 2000-09-15 AU AU75849/00A patent/AU7584900A/en not_active Abandoned
- 2000-09-15 CA CA2640839A patent/CA2640839C/en not_active Expired - Fee Related
- 2000-09-15 MX MXPA02005252A patent/MXPA02005252A/en active IP Right Grant
- 2000-09-15 CA CA2640953A patent/CA2640953C/en not_active Expired - Fee Related
- 2000-09-15 CA CA2640712A patent/CA2640712C/en not_active Expired - Fee Related
- 2000-09-15 EP EP00965065.6A patent/EP1263655B1/en not_active Expired - Lifetime
- 2000-09-15 CA CA002395947A patent/CA2395947C/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
WO2001032521A1 (en) | 2001-05-10 |
CA2640839C (en) | 2011-08-02 |
CA2640895A1 (en) | 2001-05-10 |
CA2640892C (en) | 2010-06-15 |
CA2640676C (en) | 2011-11-29 |
CA2640676A1 (en) | 2001-05-10 |
EP1263655A1 (en) | 2002-12-11 |
CA2640953A1 (en) | 2001-05-10 |
MXPA02005252A (en) | 2003-09-25 |
CA2640716C (en) | 2011-11-15 |
CA2640712C (en) | 2011-07-26 |
PT1263655E (en) | 2014-10-13 |
CA2640716A1 (en) | 2001-05-10 |
CA2395947A1 (en) | 2001-05-10 |
EP1263655A4 (en) | 2012-05-16 |
CA2640839A1 (en) | 2001-05-10 |
ES2509819T3 (en) | 2014-10-20 |
CA2395947C (en) | 2009-06-23 |
CA2640712A1 (en) | 2001-05-10 |
CA2640892A1 (en) | 2001-05-10 |
AU7584900A (en) | 2001-05-14 |
CA2640953C (en) | 2011-08-02 |
CA2640895C (en) | 2010-11-02 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US7101079B2 (en) | Resealable bag for filling with food product(s) and method | |
US7086782B2 (en) | Resealable bag for filling with food products and method | |
CA1224756A (en) | Reclosable package | |
US20030113415A1 (en) | Resealable bag for filling with food product(s) and method | |
US8012075B2 (en) | Tamper evident reclosable package | |
EP1123796B1 (en) | Methods of manufacturing reclosable packages using transverse closure and slider applicator | |
US4240241A (en) | Method and apparatus for making a reclosable package | |
EP1403191B1 (en) | Zipper bag and method of manufacturing it | |
US6530870B2 (en) | Methods of manufacturing reclosable packages; and packages made thereby | |
US8122687B2 (en) | Method of making flexible packages having slide closures | |
EP1263655B1 (en) | A resealable bag for filling with food product(s) and method | |
US20030219173A1 (en) | Tamper-evident package and method to make such a package |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20020726 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE |
|
AX | Request for extension of the european patent |
Free format text: AL PAYMENT 20020726;LT PAYMENT 20020726;LV PAYMENT 20020726;MK PAYMENT 20020726;RO PAYMENT 20020726;SI PAYMENT 20020726 |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: PACTIV CORPORATION |
|
A4 | Supplementary search report drawn up and despatched |
Effective date: 20120417 |
|
RIC1 | Information provided on ipc code assigned before grant |
Ipc: B65D 33/25 20060101ALI20120411BHEP Ipc: B65D 33/00 20060101AFI20120411BHEP |
|
17Q | First examination report despatched |
Effective date: 20120726 |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
INTG | Intention to grant announced |
Effective date: 20140129 |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: REYNOLDS PRESTO PRODUCTS INC. |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE |
|
AX | Request for extension of the european patent |
Extension state: AL LT LV MK RO SI |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D |
|
REG | Reference to a national code |
Ref country code: AT Ref legal event code: REF Ref document number: 675788 Country of ref document: AT Kind code of ref document: T Effective date: 20140715 Ref country code: CH Ref legal event code: EP |
|
REG | Reference to a national code |
Ref country code: IE Ref legal event code: FG4D |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R096 Ref document number: 60048642 Country of ref document: DE Effective date: 20140814 |
|
REG | Reference to a national code |
Ref country code: PT Ref legal event code: SC4A Free format text: AVAILABILITY OF NATIONAL TRANSLATION Effective date: 20140930 |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FG2A Ref document number: 2509819 Country of ref document: ES Kind code of ref document: T3 Effective date: 20141020 |
|
REG | Reference to a national code |
Ref country code: NL Ref legal event code: T3 |
|
REG | Reference to a national code |
Ref country code: LT Ref legal event code: MG9D |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20141003 Ref country code: FI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20140702 Ref country code: SE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20140702 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: CY Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20140702 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R097 Ref document number: 60048642 Country of ref document: DE |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20140702 Ref country code: LU Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20140915 Ref country code: MC Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20140702 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed |
Effective date: 20150407 |
|
REG | Reference to a national code |
Ref country code: IE Ref legal event code: MM4A |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20140915 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: PLFP Year of fee payment: 17 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: PLFP Year of fee payment: 18 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: PLFP Year of fee payment: 19 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: PT Payment date: 20190902 Year of fee payment: 20 Ref country code: NL Payment date: 20190926 Year of fee payment: 20 Ref country code: FR Payment date: 20190925 Year of fee payment: 20 Ref country code: IT Payment date: 20190923 Year of fee payment: 20 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: BE Payment date: 20190926 Year of fee payment: 20 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20190930 Year of fee payment: 20 Ref country code: AT Payment date: 20190920 Year of fee payment: 20 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: CH Payment date: 20190925 Year of fee payment: 20 Ref country code: DE Payment date: 20191129 Year of fee payment: 20 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: ES Payment date: 20191021 Year of fee payment: 20 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R071 Ref document number: 60048642 Country of ref document: DE |
|
REG | Reference to a national code |
Ref country code: NL Ref legal event code: MK Effective date: 20200914 |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: PE20 Expiry date: 20200914 |
|
REG | Reference to a national code |
Ref country code: BE Ref legal event code: MK Effective date: 20200915 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: PT Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION Effective date: 20200923 Ref country code: GB Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION Effective date: 20200914 |
|
REG | Reference to a national code |
Ref country code: AT Ref legal event code: MK07 Ref document number: 675788 Country of ref document: AT Kind code of ref document: T Effective date: 20200915 |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FD2A Effective date: 20220127 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION Effective date: 20200916 |