US20170203900A1 - Film bag - Google Patents

Film bag Download PDF

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Publication number
US20170203900A1
US20170203900A1 US15/405,406 US201715405406A US2017203900A1 US 20170203900 A1 US20170203900 A1 US 20170203900A1 US 201715405406 A US201715405406 A US 201715405406A US 2017203900 A1 US2017203900 A1 US 2017203900A1
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US
United States
Prior art keywords
weakness
lines
bag
edge
tear
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.)
Abandoned
Application number
US15/405,406
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English (en)
Inventor
Wilfried Thobe
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mondi Gronau GmbH
Original Assignee
Mondi Consumer Packaging Technologies GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mondi Consumer Packaging Technologies GmbH filed Critical Mondi Consumer Packaging Technologies GmbH
Assigned to MONDI CONSUMER PACKAGING TECHNOLOGIES GMBH reassignment MONDI CONSUMER PACKAGING TECHNOLOGIES GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: Thobe, Wilfried
Publication of US20170203900A1 publication Critical patent/US20170203900A1/en
Abandoned legal-status Critical Current

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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
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/52—Details
    • B65D75/58—Opening or contents-removing devices added or incorporated during package manufacture
    • B65D75/5805—Opening or contents-removing devices added or incorporated during package manufacture for tearing a side strip parallel and next to the edge, e.g. by means of a line of weakness
    • B65D75/5811—Opening or contents-removing devices added or incorporated during package manufacture for tearing a side strip parallel and next to the edge, e.g. by means of a line of weakness and defining, after tearing, a small dispensing spout, a small orifice or the like
    • 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
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/52—Details
    • B65D75/58—Opening or contents-removing devices added or incorporated during package manufacture
    • B65D75/5816—Opening or contents-removing devices added or incorporated during package manufacture for tearing a corner or other small portion next to the edge, e.g. a U-shaped portion
    • 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
    • B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
    • B65D65/38—Packaging materials of special type or form
    • B65D65/40—Applications of laminates for particular packaging purposes
    • 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
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/52—Details
    • B65D75/58—Opening or contents-removing devices added or incorporated during package manufacture
    • B65D75/5816—Opening or contents-removing devices added or incorporated during package manufacture for tearing a corner or other small portion next to the edge, e.g. a U-shaped portion
    • B65D75/5822—Opening or contents-removing devices added or incorporated during package manufacture for tearing a corner or other small portion next to the edge, e.g. a U-shaped portion and defining, after tearing, a small dispensing spout, a small orifice or the like
    • 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
    • B65D2575/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes or webs of flexible sheet material, e.g. in folded wrappers
    • B65D2575/52—Details
    • B65D2575/58—Opening or contents-removing devices added or incorporated during package manufacture

Definitions

  • German Priority Document DE 10 2016 100 824.9 filed on Jan. 19, 2016.
  • German Priority Document the subject matter of which is incorporated herein by reference, provides the basis for a claim of priority of invention under 35 U.S.C. 119(a)-(d).
  • the invention relates to a film bag having a bag body comprising two front walls, wherein a first lateral edge, which is formed from at least the two front walls, is connected at a first corner of the bag body to an upper bag edge, at which the two front walls are interconnected by a fastening seam.
  • Each of the front walls comprises, at the first corner, multiple lines of weakness which extend, in a curve and spaced from each other, from the first lateral edge up to the fastening seam.
  • a tear-open aid is situated on the fastening seam.
  • Film bags are opened in highly diverse ways in practical use. In addition to being cut open using a knife or a pair of scissors, film bags also are intended to be opened by hand.
  • multi-layer coextruded films or composite films for forming film bags, in the case of which the two opposing front walls can be opened by peeling open, i.e., separating, a fastening seam on the upper bag edge.
  • peeling open i.e., separating
  • a fastening seam on the upper bag edge.
  • Such a separation can take place either by the seal being opened or by a material failure within the layered composite, wherein either an adhesive failure or a co-adhesive failure results.
  • Suitable opening patterns also can be achieved in film bags, in the case of which an upper bag edge is closed by an adhesive.
  • the type of opening described is frequently utilized in the area of snack packagings, such as those used for potato chips, for example.
  • the entire upper bag edge is usually opened and, therefore, the contents of the film bag are easily grasped by hand.
  • a zigzag cut on the upper bag edge allows for an easy tearing-open.
  • Suitable tear-open aids such as individual indentations, tear-open notches, or a zigzag cut allow for a simple initiation of tearing.
  • Further tearing-open by a user is difficult to control, even when oriented film layers made from oriented polyethylene terephthalate (OPET) or biaxially oriented polypropylene (BO-PP) allow for easy tearing.
  • OPET oriented polyethylene terephthalate
  • BO-PP biaxially oriented polypropylene
  • opening aids in the form of lines of weakness created by a laser or by a punch in the material are known from practical application. Such lines of weakness make it possible to precisely predefine the course of the tear and the opening formed thereby. In addition, easy handling during tearing-opening also is ensured.
  • WO 2012/100 996 A1 describes a film bag, in the case of which multiple lines of weakness are situated at a first corner of the bag, body between a first lateral edge and an upper bag edge, which lines converge and thereby form a single line of weakness.
  • the embodiment described also is suitable, to an extent, for tearing open side-gusseted bags, in which the lateral fold has been inserted between the two front walls, beginning at the upper bag edge. Before the inserted lateral fold is reached, the different lines of weakness converge.
  • US 2012/0273 493 A1 describes a film bag, in the case of which either the entire upper bag edge or only one corner can be torn off.
  • Different lines of weakness or weakened line sections are provided for this purpose, wherein the course of the tear is controlled by the tear-initiation.
  • the tear-initiation takes place at one of the lateral edges.
  • the tear-initiation takes place either beginning at the opposite lateral edge or at the upper bag edge.
  • two lines of weakness extend over each other in a transverse direction of a film bag, wherein, due to a suitable sealing on the upper bag edge, either only a portion or the entire width of the bag can be opened.
  • the manufacturing of the bag is complicated, however, because large areas must be sealed to achieve the described functionality. In this case as well, incorrect handling can result in the film bag being inadvertently completely opened.
  • EP 2 650 229 A1 and CN 202 609 252 U relate to further embodiments, in the case of which a packaging can be successively further torn open, for the purpose of which the corresponding lines of weakness are arranged parallel to each other in a straight orientation.
  • a film bag having the features described at the outset is known from U.S. Pat. No. 8,740,458 B2.
  • a tear-open aid in the form of a tear-open notch is provided at an upper bag edge, wherein, starting at the tear-open aid, the tear initially proceeds, unguided, along the front walls during a tearing-open, before the tear reaches a curved line of weakness and, from there, is guided to a lateral edge of the bag body.
  • a second line of weakness situated therebelow is used as protection for the case in which the tear inadvertently diverges from the first line of weakness. If the initially unguided tear follows the line of weakness, an angulation along the course thereof results.
  • the risk of an uncontrolled tearing-open exists precisely at such angulations.
  • the line must weaken the material to a suitably great extent.
  • the size of the opening that is formed must not be influenced. The tear extends initially from the tear-open aid approximately straight downward and then transitions into the line of weakness and, therefore, the same dimensions of the opening always result during a tearing-open.
  • the present invention overcomes the shortcomings of known arts, such as those mentioned above by providing a film bag that can be torn open particularly easily and in a particularly flexible manner.
  • the inventive film bag has a bag body comprising two front walls.
  • a first lateral edge which is formed from at least the two front walls, is connected at a first corner of the bag body to an upper bag edge, at which the two front walls are interconnected by a fastening seam.
  • Each of the front walls comprises, at the first corner, lines of weakness that extend, in a curve and spaced from each other, from the first lateral edge at least up to the fastening seam.
  • a tear-open aid is situated on the fastening seam. At least three lines of weakness are provided on each front wall and the tear-open aid is designed and situated in such a way that the aid allows for a tearing-open, at the upper bag edge, between any two adjacent lines of weakness and/or precisely at each line of weakness.
  • each front wall at least three lines of weakness are provided on each front wall and the tear-open aid is designed and situated in such a way that the aid allows for a tearing-open, at the upper bag edge, between any two adjacent lines of weakness and/or precisely at each line of weakness.
  • the size of the opening can be influenced by a user to a certain extent by the at least three lines of weakness extending at a distance from each other. If only one small opening is required, it is only necessary to tear open one relatively small corner section. If a larger opening is desired, however, it is possible to utilize the tear-open aid to tear open along a line of weakness situated closer to the center of the bag, whereby a larger corner section is therefore removed.
  • the film bag also can be subsequently torn open to a larger extent, if so desired by a user.
  • the inventive bag can then be torn open further, to allow the remaining product to be quickly withdrawn.
  • a bag which has already been partially emptied is easier to handle due to the low weight thereof, wherein the product itself can develop less momentum during pouring as well.
  • the creation of a differently sized opening also can be advantageous to either remove only portions or to allow the bag to be emptied all at once as quickly as possible.
  • the film bag according to the invention may be used for highly diverse pourable products. These include, for example, foodstuffs such as rice, sugar, flour, cereals, pelleted animal feed, highly diverse powdered or granular construction products, detergents and cleaning agents, cat litter, or the like.
  • foodstuffs such as rice, sugar, flour, cereals, pelleted animal feed, highly diverse powdered or granular construction products, detergents and cleaning agents, cat litter, or the like.
  • the tear-open aid makes it possible to tear open between adjacent lines of weakness and/or precisely at each line of weakness, an uncontrolled tearing-open is also prevented. Immediately after the tearing-open, the tear will jump over to one of the two adjacent lines of weakness, and therefore the tear is then guided along a predefined course.
  • the lines of weakness extend in a curve between the first lateral edge and the upper bag edge, wherein the lines of weakness advantageously have a convex shape beginning at the first corner.
  • the convex course of the lines of weakness beginning at the first corner corresponds to the usual direction in which a user tears, and therefore the tearing-open can take place particularly easily and reliably.
  • all lines of weakness at the end thereof assigned to the upper edge, enclose an angle of more than 60° with the upper bag edge.
  • the angle is greater than 75°, being approximately 90°, for example.
  • the lines of weakness formed on the two front walls are preferably arranged to mutually overlap, wherein production-related deviations can be accepted, depending on the design.
  • a precise or at least largely precise overlap of the lines of weakness at the two front walls results when the first lateral edge is designed as a fold edge and the lines of weakness are created symmetrically relative to this fold line, which is easily possible during the production of the film bag, for example, using a form-fill-seal (FFS) method.
  • FFS form-fill-seal
  • each of the front walls Preferably, between 5 and 10 lines of weakness extending at a distance from each other are provided on each of the front walls, to achieve a very high level of comfort and flexibility for the user in a way that is as easy as possible to manufacture.
  • lines of weakness extending at a distance from each other are provided on each of the front walls, to achieve a very high level of comfort and flexibility for the user in a way that is as easy as possible to manufacture.
  • only three or four as well as more than eleven lines of weakness can be provided.
  • a greater number of lines of weakness on the two front walls can be advantageous, to achieve a greater level of flexibility in terms of the sizes of the opening to be formed.
  • the lines of weakness are arranged in the shape of a curve, at different distances from each other, about a common reference point.
  • the lines of weakness can be designed as circular arcs or elliptical arcs having a common center point.
  • the lines of weakness can extend, as quarter circles, concentrically about a center point which is situated on the first corner or about a center point which is situated to be offset relative to the first corner.
  • the lines of weakness are situated equidistantly from each other, and therefore adjacent lines of weakness have an identical separation.
  • the separation between adjacent lines of weakness is preferably between 7 mm and 30 mm, for example, 10 mm or 14 mm. If the lines of weakness are arranged, for example, as circular arcs, concentrically about one center point, the radius continuously increases according to the separation between adjacent lines of weakness.
  • the lines of weakness can be created by a laser or a punch.
  • a person skilled in the art can adapt the laser energy or the punch depth to the particular material combination and thickness.
  • the tear-open aid on the upper bag edge can be formed particularly easily by a zigzag cut.
  • Multiple indentations or notches which are situated at least in the area of the lines of weakness on the upper bag edge also are possible alternatives.
  • a zigzag cut, indentations, or notches also can extend in the transverse direction across the entire width of the film bag, along the upper bag edge.
  • a zigzag cut makes it possible to tear between two adjacent lines of weakness, wherein it is then not necessary to pay attention to the precise orientation of the zigzag section relative to the lines of weakness.
  • indentation or notches can be particularly preferably provided for this purpose.
  • the lines of weakness extend not only up to the fastening seam, but rather over the fastening seam and up to the outermost edge of the front walls, and therefore the lines of weakness themselves form the tear-open aid at the ends thereof.
  • the creation of the lines of weakness by a laser or by a punch, to create the tear-open aid, it is also possible to remove more material at the corresponding points and, if necessary, the film can be completely passed through.
  • the lines of weakness extend on the upper bag edge, beginning at the first corner, over a range between 10% and 45% of the bag width determined along the upper bag edge.
  • both corners can be provided with lines of weakness in the manner described, and therefore the described tear-open structure is then also present at a second corner between the upper bag edge and a second lateral edge, and the film bag can be torn open alternatively at one of the two lateral edges.
  • the film bag can be easily torn open by a right-handed person and by a left-handed person if the described lines of weakness are provided on the two upper corners.
  • the design of the film bag according to the invention is particularly advantageous when the bag body is formed exclusively from the two front walls and, therefore, comprises no lateral folds and, preferably, no bottom folds either.
  • a pillow-shaped bag can be formed particularly easily from a tube, wherein the film bag is preferably created using the FFS method.
  • the design of the film bag according to the invention also can be provided, however, when the bag body of the film bag is folded from a single film sheet or is formed from two film sheets by hot sealing.
  • the bag body is formed from a coextruded film or a film which has been laminated in multiple layers.
  • an inner film layer is preferably formed from a heat-sealable material such as polyolefin, in particular, polyethylene.
  • oriented film layers such as OPET and BO-PP are frequently used for the outer layers.
  • a printing is preferably located on an inner layer transition, so that the imprint is optimally protected.
  • FIG. 1 shows a film bag according to the invention, before being torn open
  • FIG. 2 shows a detailed view of a first corner of the film bag according to FIG. 1 , directly after a tearing-open beginning at an upper bag edge;
  • FIG. 3 shows the torn-open film bag according to FIG. 1 .
  • FIG. 1 shows a film bag according to the invention, the bag body of which is formed from two front walls 1 .
  • the bag body formed from the two front walls comprises a first lateral edge 2 a, a second lateral edge 2 b, a lower bag edge 3 , and an upper bag edge 4 .
  • the lower bag edge 3 and the upper bag edge 4 are each closed by a fastening seam in the form of a heat-sealed seam.
  • the front walls 1 transition into each other via bending lines, wherein a fastening seam for the peripheral closure of the bag body is preferably situated in the center on the front wall 1 which forms the back side of the bag body and which is not visible in FIG. 1 .
  • the fastening seam can be situated at one of the lateral edges 2 a, 2 b.
  • lines of weakness 6 are located in the area of a first corner 5 formed between the first lateral edge 2 a and the upper bag edge 4 .
  • the lines of weakness 6 in the embodiment shown, extend from the first lateral edge 2 a, in a curve and spaced from each other, up to the fastening seam at the upper bag edge 4 , wherein a tear-open aid is situated on the fastening seam.
  • a zigzag cut 7 is provided as the tear-open aid.
  • multiple notches or indentations can be provided as the tear-open aid.
  • At least three and, in the exemplary embodiment, seven lines of weakness 6 are located on each front wall.
  • the tear-open aid is designed and situated in such a way that said aid allows for a tearing-open, at the upper edge, between two adjacent lines of weakness 6 .
  • the upper bag edge can be torn open by a user at approximately any point (at any depth). If separate notches or indentations, for example, are provided instead of a zigzag cut 7 , then such a notch or indentation can be provided at least between any two adjacent lines of weakness 6 .
  • the tear initially extends downward at an approximately right angle and can then be received by one of the adjacent lines of weakness 6 .
  • the lines of weakness have a convex shape relative to the first corner 5 and usually enclose an angle of more than 60° with the upper bag edge 4 .
  • the lines of weakness 6 preferably extend in the shape of a curve, at different distances from each other, about a common reference point.
  • the lines of weakness 6 can extend, as quarter circles, concentrically about a center point situated at the first corner 5 , wherein an equidistant arrangement of the lines of weakness 6 is achieved by means of a uniformly increasing radius.
  • the distance between adjacent lines of weakness can be, for example, between 7 mm and 30 mm, being approximately 15 mm, for example.
  • the lines of weakness 6 are created by a laser, wherein the formation by a punch is also a possibility. If the film bag is torn open further, proceeding from FIG. 2 , a bag section having the first corner 5 is ultimately completely removed, and therefore the contents of the film bag can then be removed ( FIG. 3 ). As should be apparent from FIG. 3 , the opening can easily be enlarged by a user by removing a further, then annular section along a further line of weakness 6 .
US15/405,406 2016-01-19 2017-01-13 Film bag Abandoned US20170203900A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016100824.9A DE102016100824A1 (de) 2016-01-19 2016-01-19 Folienbeutel
DE102016100824.9 2016-01-19

Publications (1)

Publication Number Publication Date
US20170203900A1 true US20170203900A1 (en) 2017-07-20

Family

ID=57542820

Family Applications (1)

Application Number Title Priority Date Filing Date
US15/405,406 Abandoned US20170203900A1 (en) 2016-01-19 2017-01-13 Film bag

Country Status (6)

Country Link
US (1) US20170203900A1 (de)
EP (1) EP3196146B1 (de)
JP (1) JP2017128390A (de)
CN (1) CN106976633B (de)
DE (1) DE102016100824A1 (de)
ES (1) ES2721774T3 (de)

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USD896633S1 (en) 2019-01-29 2020-09-22 Golden State Foods Corp. Container

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JP2008074464A (ja) * 2006-09-22 2008-04-03 Taisei Lamick Co Ltd 液体包装袋
US20120100996A1 (en) * 2009-04-09 2012-04-26 Sophie Hubert Genetic marker identification in atlantic cod
US20130251290A1 (en) * 2012-03-23 2013-09-26 Brad Sterling Tear open bag with transmission barrier

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD896634S1 (en) 2019-01-29 2020-09-22 Golden State Foods Corp. Container
USD896633S1 (en) 2019-01-29 2020-09-22 Golden State Foods Corp. Container

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CN106976633B (zh) 2020-07-03
JP2017128390A (ja) 2017-07-27
EP3196146A1 (de) 2017-07-26
DE102016100824A1 (de) 2017-07-20
CN106976633A (zh) 2017-07-25
ES2721774T3 (es) 2019-08-05
EP3196146B1 (de) 2019-02-20

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