CA2214738A1 - Gussetted flexible package with easy open folded mouth and adhesive strip for reclosing the mouth after opening - Google Patents
Gussetted flexible package with easy open folded mouth and adhesive strip for reclosing the mouth after opening Download PDFInfo
- Publication number
- CA2214738A1 CA2214738A1 CA 2214738 CA2214738A CA2214738A1 CA 2214738 A1 CA2214738 A1 CA 2214738A1 CA 2214738 CA2214738 CA 2214738 CA 2214738 A CA2214738 A CA 2214738A CA 2214738 A1 CA2214738 A1 CA 2214738A1
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- Canada
- Prior art keywords
- package
- panels
- flap
- adhesive
- mouth
- 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
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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
- B65D33/00—Details of, or accessories for, sacks or bags
- B65D33/16—End- or aperture-closing arrangements or devices
- B65D33/18—End- or aperture-closing arrangements or devices using adhesive applied to integral parts, e.g. to flaps
- B65D33/20—End- or aperture-closing arrangements or devices using adhesive applied to integral parts, e.g. to flaps using pressure-sensitive adhesive
-
- 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
- B65D33/1691—End- or aperture-closing arrangements or devices using adhesive applied to attached closure elements
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Packages (AREA)
Abstract
A flexible package having an interior for holding a product (e.g., coffee, chemicals, pet foods, etc.) therein. The package has a front panel and a rear panel connected to each other by respective side gussets. Each of the panels and gussets has an upper edge which conjoin to form a mouth for the package. The package additional includes a peelable closure located within its mouth for sealing its interior, and a first adhesive strip fixedly secured to one of the panels. The upper edge portion of is package is folded over along a fold line to form a flap, wherein the upper edge portion of one of the panels abuts another portion of that panel and is releasably secured thereto by an adhesive. A cover sheet is removable secured to the adhesive strip. The package's mouth is opened by unfolding the flap and peeling open the peelable closure. The mouth can be reclosed by removing the cover sheet from the adhesive strip and folding the package along the fold line to reform the flap and then folding the flap over itself to bring a portion of the other of the panels into engagement with a portion of the one of the panels so that the adhesive strip is interposed therebetween for releasable securing the engaging portions together.
Description
CA 02214738 1997-09-0~
GU8&~,~:v FT~YTRT~ PACRAGE WITH EASY OPEN FOLDED MOUTH
SPECIFICATION
BACKGROUND OF THE INVENTION
This invention relates generally to flexible packages, and more particularly to flexible packages for holding products under vacuum therein, and which once opened are arranged to be reclosed to keep the contents fresh (e.g., decrease exposure to air), and/or to prevent odor(s) from emanating therefrom, and/or to prevent spillage of the contents.
Various types of flexible packages for holding particulate materials, e.g., ground or whole bean coffee, chemicals, etc., under vacuum therein have been disclosed in the patent literature and are commercially available today. Examples of such packages are found in the following United States Letters Patent: 4,576,285 (Goglio), 4,705,174 (Goglio), and 4,913,561 (Beer).
The major advantages of flexible packaging, as compared to relatively rigid packaging, e.g., cartons, are that until the flexible package is filled it takes up very little volume, and after it is emptied of its contents it readily collapses, thereby reducing its volume to approximately that of the unfilled package. The former characteristic is a significant advantage insofar as storage is concerned, while the latter characteristic is a significant advantage from the standpoint of disposability.
One common type of flexible package for holding goods under vacuum until the package is opened is the so-called "gussetted"
package or bag. Typically such a package is formed from a web of flexible stock material, e.g., polyethylene, polyester, polypropylene, metal foil ! and combinations thereof in single or multiple plies, into a tubular body, having a face panel, a back panel, and a pair of gussetted sides. Each gussetted side is formed by a pair of gusset sections and a central fold edge interposed between a pair of outer fold edges. The lower end of the bag is commonly permanently sealed, e.g., heat sealed, along a line extending transversely across the width of the bag CA 02214738 1997-09-0~
close to its bottom edge. The top of the bag is commonly sealed transversely across the entire width of the bag in a number of ways to maintain the contents under vacuum until the bag is opened. Such action is frequently accomplished via a readily openable mouth, which when opened provides access to the contents of the bag. For example, in one prior art package the top seal is made peelable by modifying the sealant layer with a peelable coating or incompatible additive. Thus, when the seal is peeled apart the unsealed portions form an open mouth through which the contents of the package may be removed.
Another approach to providing an opening or mouth for a flexible package is that of the heretofore identified Patent No.
4,705,174 (Goglio). That package includes a peel strip applied to the inner surface of the package below the top edges. The strip provides an air-tight interfacial seal which can be readily peeled apart to provide access to the interior of the package.
For many applications of peelably openable flexible packaging it is desirable to be able to reclose the package after its mouth has been peeled opened in order to retain the remaining contents in the package so that they do not spill out, and/or that odors do not emanate from the package when the contents are odorifous, and/or that the contents be somewhat isolated from the ambient atmosphere. Heretofore reclosure of such packages has been accomplished in several ways. One way is to fold over the top pcrtion of the package contiguous with the peeled-open mouth to form a flap and to then apply a small strip of adhesive tape or a small preprinted adhesive label onto a portion of the flap and a portion of the contiguous package to hold the flap in place. These tapes or labels only secure a small, e.g., approximately a 25 mm, section of the folded package mouth, and thus are prone to releasing and allowing the mouth to reopen, whereupon spillage is possible. Moreover, since the strips of tape or adhesive labels are not integral portions of the package, they must be removed from their original position (be it on the package or elsewhere) and repositioned onto the folded flap in order to be used. The CA 02214738 1997-09-0~
necessity of repositioning raises the possibility of loss or misplacement. In addition, repositioning may also result in the weakening of the adhesion strength of the tape or label.
Another approach to adhesively reseal peelably openable flexible packaging entails making the adhesive an integral part of the flexible package. In particular, Fres-Co System USA, Inc., the assignee of the subject invention, has provided a package for holding particulate chemicals, e.g., a crystalline catalyst, which included a band of an adhesive transfer on a portion of its exterior surface substantially below its mouth.
The package was arranged so that its top edge portion, which formed its mouth, could be folded over to form a flap and to bring the flap into engagement with the band of the adhesive transfer to thereby hold the flap in place. In order to protect the band of the adhesive transfer from dust, dirt, product residue or other contaminants until it was ready to be used, a paper liner or cover strip was provided releasably secured over the band of the adhesive transfer. In particular, once that package was opened and a portion of its contents removed the cover sheet or strip was peeled off of the band of the adhesive transfer to expose it. The top portion of the package was then folded over itself to form a flap and the flap brought into engagement with the exposed band of the adhesive transfer to hold the flap in place.
While the foregoing type of flexible package has proved generally suitable for its intended purposes, it still leaves something to be desired from various standpoints under certain operating conditions. For example, when the package is of a large size for holding a substantial weight (e.g., 25 Kg.) of material, and a plurality of such packages are stacked on one another vertically, with the plane of the abutting surfaces forming the peelable mouth of each package being horizontal, the pressure on a package's contents by the weight of the package(s) stacked thereon may be sufficient to cause the peelable seal at the package's mouth to rupture or peel apart, thereby enabling the contents to spill out. In other cases the stress of shipping and/or distribution can result in the peelable mouth CA 02214738 1997-09-0~
accidentally opening, thereby allowing the contents to spill out of the package. Moreover, since the adhesive utilized is in the form of a transfer, as opposed to a tape, transference of the adhesive from one surface to another during use could adversely affect its effectiveness as a reclosure means.
OBJECTS OF THE INVENTION
Accordingly, it is a general object of this invention to provide a peelably sealed, reclosable mouth, gussetted, flexible package which overcomes the disadvantages of the prior art.
It is a further object of this invention to provide a peelably sealed, reclosable mouth, gussetted, flexible package which is resistant to accidental opening, yet can be readily opened when desired, and once opened can be readily resealed.
It is a further object of this invention to provide a gussetted flexible package which includes adhesive means for enabling the package to be resealed after initial opening and which adhesive means is protected from contamination by dust, dirt, product residue, etc., until it is desired to be used.
SUMMARY OF THE INVENTION
These and other objects of the instant invention are achieved by providing a flexible, gussetted package having an interior for holding some material, e.g., whole bean coffee, therein. The package is formed of a flexible material and comprises a front panel and a rear panel connected to each other by respective side gussets. Each of the panels and gussets has an upper edge and upper edge portions contiguous therewith. The upper edge portions conjoin to form a mouth for the package.
The package additionally includes a first peelable closure located within its mouth for sealing its interior and a first adhesive means.
The upper edge portions of the package are folded over along a fold line to form a flap, wherein the upper edge portion of one of the panels, e.g., the rear panel, abuts another portion of that panel and is releasably secured thereto.
The first adhesive means is in the form of an adhesive strip having an inner adhesive surface, an outer adhesive surface, and a cover sheet removable secured to the outer CA 02214738 1997-09-0~
adhesive surface. The inner adhesive surface is fixedly secured to a portion of one of the panels.
The mouth of the package is arranged to be opened by unfolding the flap and peeling open the peelable closure means to provide access to the interior of the package. The mouth of the package can be reclosed by removing the cover sheet from the adhesive strip and folding the upper edge portions of the package along the fold line to reform the flap, and then folding the flap over itself to bring a portion of the other of the panels, e.g., the front panel, contiguous with the top edge of the package into engagement with a portion of the one of the panels, e.g., the rear panel, and wherein the adhesive strip is interposed therebetween for releasable securing the engaging portions together.
In one embodiment the adhesive strip is located on the one of the panels, e.g., the rear panel, below the position of the upper edge after the flap is formed. In another embodiment the adhesive strip is located on the other one of the panels, e.g., the front panel, immediately below the top edge thereof.
In either case the cover sheet is constructed so that it protects the adhesive strip from contamination while it is in place on the adhesive strip.
DESCRIPTION OF THE DRAWING
Fig. 1 is an isometric view of a package constructed in accordance with the invention and shown in its initially closed state;
Fig. 2 is an isometric view, similar to Fig. 1, showing the top of the package after being peeled open, and ready for reclosure;
Fig. 3 is an enlarged sectional view taken along line 3-3 of Fig. 1;
Fig. 4 is an enlarged sectional view taken along line 4-4 of Fig. 2;
Fig. 5 is a view similar to Fig. 3, but showing the package after reclosure;
Fig. 6 is an isometric view of an alternative embodiment of a package constructed in accordance with this invention;
CA 02214738 1997-09-0~
Fig. 7 is a sectional view taken along line 7-7 of Fig. 6;
Fig. 8 is an isometric view of the top portion of the package shown in Fig. 6 ready to be initially peeled open;
Fig. 9 is a sectional view taken along 9-9 of Fig. 8;
Fig. 10 is an isome~.ric view of the top portion of the package of Fig. 6 but shown after it has been reclosed; and Fig. 11 is a sectional view taken along line 11-11 of Fig.
10 .
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring to Fig. 1, there is shown at 20 in Fig. 1 one embodiment of a flexible package constructed in accordance with this invention. The package 20 basically comprises a gussetted bag 20 arranged to hold any material, e.g., whole coffee beans, ground coffee, etc., for dispensing (e.g., pouring) therefrom.
The bag 20 is formed of a web of any suitable, flexible material in a manner to be described later. In Fig. 6 there is shown an alternative embodiment of the package of this invention. That alternative embodiment is designated by the reference number 22, and is particularly suited for holding larger quantities of pourable dry materials, e.g., chemicals, therein. The details of the alternative package 22 will be described later.
Turning now to Figs. 1-5, it can be seen that bag 20 basically comprises a front wall or panel 24 (Fig. 4), a rear wall or panel 26 (Figs. 1 and 4), a pair of identical gussetted sides 28 (Figs. 1 and 4), a top end portion 30, and a bottom end portion 32. The top end portion 30 of the package terminates in a top marginal edge 34. In a similar manner the bottom end portion 32 terminates in a bottom marginal edge 36. If desired, an a one-way venting valve (not shown) may be included in any suitable portion of the bag to enable gases which may be produced by the material(s), contained within the bag after the bag is sealed to vent to the ambient air without air gaining ingress to the bag's interior.
The front panel 24, rear panel 26, and the two gussetted sides 28 of the bag are preferably integral portions of a single sheet or web of the flexible material, of single or multiple ply or layers, which has been folded and seamed to form a tubular CA 02214738 1997-09-0~
body. One particularly useful flexible material for the bag 20 is a laminated web of flexible packaging material commercially available from Fres-Co System USA, Inc., of Telford PA, the assignee of this invention. That material comprises a 48 gauge polyester layer, ink, an adhesive layer, a 28 gauge aluminum foil layer, another adhesive layer, a 60 gauge nylon layer, another adhesive layer, and a 600 gauge easy-open sealant layer.
When a web of such material is formed into the tubular body for the package the polyester layer serves as the outer surface of the package, with the easy-open sealant layer serving as the inner surface of the package.
AS can be seen clearly in Fig. 1, the rear panel 2 6 of the package 20 includes a fin 38 which extends longitudinally along the back of the package from the top edge to the bottom edge.
The fin 38 iS located approximately midway between the gussetted sides 28 and is formed by portions of the web material contiguous with the vertical marginal edges of the sheet or web which are brought into engagement with each other and are secured to one another via any conventional sealing technique, such as heat sealing or welding. The resultant fin or seam 38 is folded down so it lays substantially flush with the rear wall 2 6 of the package.
The mouth of the bag 20 iS arranged to be initially hermet-ically sealed closed along a transverse, peelable seal line 40 (Figs. 2-4), after the bag~has been filled and vacuumized. The seal line 40 iS formed in a conventional manner and extends across the width of the bag 20 slightly below the top edge 34 to seal the inner surfaces of the abutting front and rear panels to each other between the inner fold lines 28A of the pair of gussets 28. The seal line 40 also seals the marginal portions of the front panel to the abutting portions of the gussetted sides contiguous therewith and seals the marginal portions of the rear panel to the abutting portions of the gussetted sides contiguous therewith. Thus, the seal line 40 serves to isolate the contents of the package from the ambient atmosphere once it is sealed.
CA 02214738 1997-09-0~
In accordance with a preferred embodiment of this invention, the peelable seal line 40 is formed by heat sealing of the abutting easy-open sealant layer portions forming the inner surface of the bag 20. Alternatively, the seal line 40 can be formed in any other conventional manner, e.g., the use of peelable sealing strips like that disclosed in the aforementioned Goglio patents, whose disclosures are incorporated by reference herein.
The lower or bottom end 32 of the bag is sealed closed along a transverse, permanent seam line closely adjacent the bottom edge 36. The permanent seam line is formed using any conventional sealing technique, such as that used for the vertical seamed fin 38.
When the bag 20 is filled, vacuumized, and sealed its contents, e.g., whole bean coffee or chemicals, will be kept isolated from the ambient air by the seal line 40. In order to ensure that the mouth of the bag is resistant to accidental opening, while being able to be readily manually opened (as will be described hereinafter) when desired, the top portion 30 of the package is folded dowrl along a transverse fold line 12A to form a flap 12, such as shown in Fig. 1. The flap 12 is held in place by an elongate bead of adhesive 42 (Fig. 3), e.g., a hot-melt adhesive bead 42 located at the interface of the abutting surfaces. In particular, in the embodiment shown in Fig. 3 the hot-melt adhesive 42 is interposed between the outer surface of the rear panel 26 between its top edge 34 and the fold line 12A (i.e., the portion forming rear surface of the flap 12) and the outer surface of the rear panel immediately below the fold line 12A.
The folded-over flap thus reinforces the peelable seal 40 to prevent it from accidentally peeling apart even when pressure is applied to the packagf-! (as may occur during stacking of plural packages or during rough handling). A strip of tape, such as conventional adhesive tape 14, may be used to hold the flap down on the contiguous portion of the package as shown in Fig. 1.
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In order to gain ingress into the package so that some or all of its contents can be~removed, the tape 14 is removed and the free edge of the flap 12 is grasped and pulled outward away from the plane of the portion of the package to which the flap is adhesively secured by adhesive 42. This action breaks the adhesive bead 42 at the flap's interface with the underlying portion of the package, whereupon the flap can be unfolded to the position shown in Fig. 4. The top marginal edges 34 of the front and rear panels of the package can then be grasped and pulled apart in the direction of the arrows in Fig. 4 to peel open the peelable seal line 40, and thereby open the mouth of the package as shown in Fig. 2. The contents of the package can then be poured or otherwise removed through the package's now open mouth.
As mentioned earlier the package 20 is arranged to be reclosed by refolding its flap 12 and adhesively securing the refolded flap in place. To that end, as can be seen clearly in Fig. 2, the embodiment of the package 20 shown therein includes a strip of adhesive tape 44 secured to the front panel between the top marginal edge 34 and the fold line 12A. The strip of tape 44 extends for a substantial width of the front panel 24 and includes an inner surface 44A, and outer surface 44B. The inner surface 44A of the tape strip is fixedly secured to the underlying surface portion of the front panel 24. In order to protect the tape's adhesive outer surface 44B from contamination, e.g., dust, dirt, product residue, etc., until it is ready to be used, a cover or liner strip 46 of at least the same size and shape as the tape strip 44 is releasably secured to the outer surface 44B of the tape strip 44.
In accordance with one preferred embodiment of the invention the adhesive tape is a two-sided adhesive film, such as that sold by Minnesota Mining & Manufacturing Company (3M) under the product designation "3M Double Coated Film Tape #476XL." The liner or cover strip 46 is paper.
Reclosure of the package 20 is effected by merely refolding the top portion of the package along the fold line 12A to reform the flap 14. The liner strip 46 is removed from the tape strip 44, thereby exposing the adhesive outer surface 44B of that strip. The upper portion of the package from the fold line 12A
to the marginal edge of the package, i.e., the portion of the package forming the flap 12, is then folded over itself so that the exposed adhesive surface of the strip engages the rear panel of the package immediately below the marginal edge of the package, to thereby releasably secure the folded over portion in place as shown in Fig. 5. Reopening of the package can be readily achieved by pullirg on the double folded portion of the package to break the adhesion of the interposed tape 44, whereupon the flap 12 can be unfolded and the package's mouth reopened. Reclosure of the package's mouth can be accomplished in a similar manner to that described heretofore, providing that the adhesive outer surface 44B of the tape 44 remains relatively uncontaminated so that it still exhibits adhesive properties.
In order to ensure such action the liner strip 46 (if retained) can be reapplied to the outer surface 44B of the tape strip 44 until reclosure of the package is desired.
In Fig. 6 there is shown an alternative embodiment 22 of the package of this invention. The package 22 is of similar construction to the package 20 except that it is considerably larger in size, and is hence suitable for packaging of large quantities of particulate materials, e.g., agricultural chemical, dry pet foods, etc. Moreover, as will be described hereinafter, the adhesive means for reclosing the package 22 is located on a portion of the package not forming its flap 12.
In the interest of brevity the details of the construction components or portions of the package 22 which are the same as the corresponding portions of the package 20 will not be reiterated. However, those components will be given the same reference numbers. As can be seen in Figs. 8 and 9, the package 22 includes a pair of peelable seal lines 40A and 40B, in lieu of the single peelable seal line 40 of package 20. The adhesive strip for reclosing the m~uth of the bag 22 is similar to the strip 40 of package 20, albeit of a larger size. Thus, as can be seen in Figs. 6-9 the adhesive strip is in the form of a wide strip 44' having an inner surface fixedly secured to the rear panel 26 of the bag below the marginal edge 34 of the folded flap 12. The strip 44' extends for substantially the full width of the rear panel 26 and includes an outer surface which is initially covered by a li~ler or cover strip 46'. The liner or cover strip 46' serves the same purpose as the cover strip 46 of the package 20 and is similarly constructed.
Initial opening of the package 22 is similar to that of package 20 except that there is no tape strip 14 to remove.
Thus, once the flap 12 is lifted up from its position in Figs.
6 and 7 to the position shown in Figs. 8 and 9, the mouth of the bag 22 can be pulled open (peeled apart) by pulling on the upper edges of the front and rear panels of the bag in the direction of the arrows in Fig. 9. The action breaks the peelable seal lines 40A and 40B.
Reclosure of the package 22 is virtually the same as that described with respect to package 20, notwithstanding the fact that the adhesive strip 44' is on the rear panel of the package 22 (whereas the strip 44 of package 20 is the front panel portion of that package's flap). Thus, reclosure of the package 22 is accomplished by merely refolding the top portion of the package 22 along the fold line 12A to reform the flap 12. The liner strip 46' is removed from the tape strip 44' on the rear panel, thereby exposing its adhesive outer surface of that strip. The upper portion of the package from the fold line 12A
to the marginal edge 34 of the package, i.e., the portion of the package forming the flap 12, is then folded over itself and brought into engagement with the exposed adhesive surface of the strip 44' on the rear panel 26 of the package 22, to thereby releasably secure the folded over portion in place.
Reopening of the package 22 can be readily achieved by pulling on the double folded portion of the package to break the adhesion of the interposed tape 44', whereupon the flap 12 can be unfolded and the package's mouth opened. Reclosure of the package's mouth can be accomplished in a similar manner to that described heretofore.
As should be appreciated from the foregoing each package of this invention provides a complete system for opening and CA 02214738 1997-09-0~
closing its peelably openable mouth. Since the peelable closure in the mouth is contained within the folded-over flap, it is hence protected by the flap from accidental opening during shipment and/or storage. When access to the contents of the package is desired, the peelable seal allows the package to be opened without the use of a scissors, knife, or other cutting instrument, by merely pulling the facing portions of the mouth of the package apart from each other. The adhesive securement means, e.g., the tape strip, in combination with the folded flap form a reclosure for the package which is effective to prevent spillage from the interio- of the package, and/or to decrease odor emanation from the contents of the package, and/or to minimize exposing the contents of the package to the ambient atmosphere (air). The use of the cover or liner strip on the adhesive strip until it is ready for use ensures that the adhesive strip is protected from dust, dirt, product residue (e.g., ground coffee), etc. prior to first use thereof.
Moreover, since the adhesive tape strip is prepositioned on the package, misplacement or loss of the strip is precluded and loss of adhesion strength is minimized by preventing migration of the strip.
It must be pointed out at this juncture that the two package embodiments 20 and 22 described heretofore are merely exemplary of many types, ;shapes and construction of packages which can be made in accordance with this invention. Thus, packages may be gussetted or non-gussetted, rectangular, square or any other shape and/or size. The adhesive securement means can comprises one or more strips, patches, etc., of an adhesive material suitable to be permanently placed at any suitable location on the package for holding a folded over flap of the package in a closed state after the package is initially opened.
Thus, the adhesive strip need not be constructed like that described above, nor located in the position(s) described above.
However, the adhesive strip(s) should be provided with some removable means, e.g., a cover or liner sheet/strip, to prevent contamination or loss of adhesive properties prior to use.
CA 02214738 1997-09-0~
Moreover, for some applications the hot-melt adhesive 42 may not be used to hold the flap in place.
Without further elaboration the foregoing will so fully illustrate our invention that others may, by applying current or future knowledge, adopt the same for use under various conditions of service.
GU8&~,~:v FT~YTRT~ PACRAGE WITH EASY OPEN FOLDED MOUTH
SPECIFICATION
BACKGROUND OF THE INVENTION
This invention relates generally to flexible packages, and more particularly to flexible packages for holding products under vacuum therein, and which once opened are arranged to be reclosed to keep the contents fresh (e.g., decrease exposure to air), and/or to prevent odor(s) from emanating therefrom, and/or to prevent spillage of the contents.
Various types of flexible packages for holding particulate materials, e.g., ground or whole bean coffee, chemicals, etc., under vacuum therein have been disclosed in the patent literature and are commercially available today. Examples of such packages are found in the following United States Letters Patent: 4,576,285 (Goglio), 4,705,174 (Goglio), and 4,913,561 (Beer).
The major advantages of flexible packaging, as compared to relatively rigid packaging, e.g., cartons, are that until the flexible package is filled it takes up very little volume, and after it is emptied of its contents it readily collapses, thereby reducing its volume to approximately that of the unfilled package. The former characteristic is a significant advantage insofar as storage is concerned, while the latter characteristic is a significant advantage from the standpoint of disposability.
One common type of flexible package for holding goods under vacuum until the package is opened is the so-called "gussetted"
package or bag. Typically such a package is formed from a web of flexible stock material, e.g., polyethylene, polyester, polypropylene, metal foil ! and combinations thereof in single or multiple plies, into a tubular body, having a face panel, a back panel, and a pair of gussetted sides. Each gussetted side is formed by a pair of gusset sections and a central fold edge interposed between a pair of outer fold edges. The lower end of the bag is commonly permanently sealed, e.g., heat sealed, along a line extending transversely across the width of the bag CA 02214738 1997-09-0~
close to its bottom edge. The top of the bag is commonly sealed transversely across the entire width of the bag in a number of ways to maintain the contents under vacuum until the bag is opened. Such action is frequently accomplished via a readily openable mouth, which when opened provides access to the contents of the bag. For example, in one prior art package the top seal is made peelable by modifying the sealant layer with a peelable coating or incompatible additive. Thus, when the seal is peeled apart the unsealed portions form an open mouth through which the contents of the package may be removed.
Another approach to providing an opening or mouth for a flexible package is that of the heretofore identified Patent No.
4,705,174 (Goglio). That package includes a peel strip applied to the inner surface of the package below the top edges. The strip provides an air-tight interfacial seal which can be readily peeled apart to provide access to the interior of the package.
For many applications of peelably openable flexible packaging it is desirable to be able to reclose the package after its mouth has been peeled opened in order to retain the remaining contents in the package so that they do not spill out, and/or that odors do not emanate from the package when the contents are odorifous, and/or that the contents be somewhat isolated from the ambient atmosphere. Heretofore reclosure of such packages has been accomplished in several ways. One way is to fold over the top pcrtion of the package contiguous with the peeled-open mouth to form a flap and to then apply a small strip of adhesive tape or a small preprinted adhesive label onto a portion of the flap and a portion of the contiguous package to hold the flap in place. These tapes or labels only secure a small, e.g., approximately a 25 mm, section of the folded package mouth, and thus are prone to releasing and allowing the mouth to reopen, whereupon spillage is possible. Moreover, since the strips of tape or adhesive labels are not integral portions of the package, they must be removed from their original position (be it on the package or elsewhere) and repositioned onto the folded flap in order to be used. The CA 02214738 1997-09-0~
necessity of repositioning raises the possibility of loss or misplacement. In addition, repositioning may also result in the weakening of the adhesion strength of the tape or label.
Another approach to adhesively reseal peelably openable flexible packaging entails making the adhesive an integral part of the flexible package. In particular, Fres-Co System USA, Inc., the assignee of the subject invention, has provided a package for holding particulate chemicals, e.g., a crystalline catalyst, which included a band of an adhesive transfer on a portion of its exterior surface substantially below its mouth.
The package was arranged so that its top edge portion, which formed its mouth, could be folded over to form a flap and to bring the flap into engagement with the band of the adhesive transfer to thereby hold the flap in place. In order to protect the band of the adhesive transfer from dust, dirt, product residue or other contaminants until it was ready to be used, a paper liner or cover strip was provided releasably secured over the band of the adhesive transfer. In particular, once that package was opened and a portion of its contents removed the cover sheet or strip was peeled off of the band of the adhesive transfer to expose it. The top portion of the package was then folded over itself to form a flap and the flap brought into engagement with the exposed band of the adhesive transfer to hold the flap in place.
While the foregoing type of flexible package has proved generally suitable for its intended purposes, it still leaves something to be desired from various standpoints under certain operating conditions. For example, when the package is of a large size for holding a substantial weight (e.g., 25 Kg.) of material, and a plurality of such packages are stacked on one another vertically, with the plane of the abutting surfaces forming the peelable mouth of each package being horizontal, the pressure on a package's contents by the weight of the package(s) stacked thereon may be sufficient to cause the peelable seal at the package's mouth to rupture or peel apart, thereby enabling the contents to spill out. In other cases the stress of shipping and/or distribution can result in the peelable mouth CA 02214738 1997-09-0~
accidentally opening, thereby allowing the contents to spill out of the package. Moreover, since the adhesive utilized is in the form of a transfer, as opposed to a tape, transference of the adhesive from one surface to another during use could adversely affect its effectiveness as a reclosure means.
OBJECTS OF THE INVENTION
Accordingly, it is a general object of this invention to provide a peelably sealed, reclosable mouth, gussetted, flexible package which overcomes the disadvantages of the prior art.
It is a further object of this invention to provide a peelably sealed, reclosable mouth, gussetted, flexible package which is resistant to accidental opening, yet can be readily opened when desired, and once opened can be readily resealed.
It is a further object of this invention to provide a gussetted flexible package which includes adhesive means for enabling the package to be resealed after initial opening and which adhesive means is protected from contamination by dust, dirt, product residue, etc., until it is desired to be used.
SUMMARY OF THE INVENTION
These and other objects of the instant invention are achieved by providing a flexible, gussetted package having an interior for holding some material, e.g., whole bean coffee, therein. The package is formed of a flexible material and comprises a front panel and a rear panel connected to each other by respective side gussets. Each of the panels and gussets has an upper edge and upper edge portions contiguous therewith. The upper edge portions conjoin to form a mouth for the package.
The package additionally includes a first peelable closure located within its mouth for sealing its interior and a first adhesive means.
The upper edge portions of the package are folded over along a fold line to form a flap, wherein the upper edge portion of one of the panels, e.g., the rear panel, abuts another portion of that panel and is releasably secured thereto.
The first adhesive means is in the form of an adhesive strip having an inner adhesive surface, an outer adhesive surface, and a cover sheet removable secured to the outer CA 02214738 1997-09-0~
adhesive surface. The inner adhesive surface is fixedly secured to a portion of one of the panels.
The mouth of the package is arranged to be opened by unfolding the flap and peeling open the peelable closure means to provide access to the interior of the package. The mouth of the package can be reclosed by removing the cover sheet from the adhesive strip and folding the upper edge portions of the package along the fold line to reform the flap, and then folding the flap over itself to bring a portion of the other of the panels, e.g., the front panel, contiguous with the top edge of the package into engagement with a portion of the one of the panels, e.g., the rear panel, and wherein the adhesive strip is interposed therebetween for releasable securing the engaging portions together.
In one embodiment the adhesive strip is located on the one of the panels, e.g., the rear panel, below the position of the upper edge after the flap is formed. In another embodiment the adhesive strip is located on the other one of the panels, e.g., the front panel, immediately below the top edge thereof.
In either case the cover sheet is constructed so that it protects the adhesive strip from contamination while it is in place on the adhesive strip.
DESCRIPTION OF THE DRAWING
Fig. 1 is an isometric view of a package constructed in accordance with the invention and shown in its initially closed state;
Fig. 2 is an isometric view, similar to Fig. 1, showing the top of the package after being peeled open, and ready for reclosure;
Fig. 3 is an enlarged sectional view taken along line 3-3 of Fig. 1;
Fig. 4 is an enlarged sectional view taken along line 4-4 of Fig. 2;
Fig. 5 is a view similar to Fig. 3, but showing the package after reclosure;
Fig. 6 is an isometric view of an alternative embodiment of a package constructed in accordance with this invention;
CA 02214738 1997-09-0~
Fig. 7 is a sectional view taken along line 7-7 of Fig. 6;
Fig. 8 is an isometric view of the top portion of the package shown in Fig. 6 ready to be initially peeled open;
Fig. 9 is a sectional view taken along 9-9 of Fig. 8;
Fig. 10 is an isome~.ric view of the top portion of the package of Fig. 6 but shown after it has been reclosed; and Fig. 11 is a sectional view taken along line 11-11 of Fig.
10 .
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring to Fig. 1, there is shown at 20 in Fig. 1 one embodiment of a flexible package constructed in accordance with this invention. The package 20 basically comprises a gussetted bag 20 arranged to hold any material, e.g., whole coffee beans, ground coffee, etc., for dispensing (e.g., pouring) therefrom.
The bag 20 is formed of a web of any suitable, flexible material in a manner to be described later. In Fig. 6 there is shown an alternative embodiment of the package of this invention. That alternative embodiment is designated by the reference number 22, and is particularly suited for holding larger quantities of pourable dry materials, e.g., chemicals, therein. The details of the alternative package 22 will be described later.
Turning now to Figs. 1-5, it can be seen that bag 20 basically comprises a front wall or panel 24 (Fig. 4), a rear wall or panel 26 (Figs. 1 and 4), a pair of identical gussetted sides 28 (Figs. 1 and 4), a top end portion 30, and a bottom end portion 32. The top end portion 30 of the package terminates in a top marginal edge 34. In a similar manner the bottom end portion 32 terminates in a bottom marginal edge 36. If desired, an a one-way venting valve (not shown) may be included in any suitable portion of the bag to enable gases which may be produced by the material(s), contained within the bag after the bag is sealed to vent to the ambient air without air gaining ingress to the bag's interior.
The front panel 24, rear panel 26, and the two gussetted sides 28 of the bag are preferably integral portions of a single sheet or web of the flexible material, of single or multiple ply or layers, which has been folded and seamed to form a tubular CA 02214738 1997-09-0~
body. One particularly useful flexible material for the bag 20 is a laminated web of flexible packaging material commercially available from Fres-Co System USA, Inc., of Telford PA, the assignee of this invention. That material comprises a 48 gauge polyester layer, ink, an adhesive layer, a 28 gauge aluminum foil layer, another adhesive layer, a 60 gauge nylon layer, another adhesive layer, and a 600 gauge easy-open sealant layer.
When a web of such material is formed into the tubular body for the package the polyester layer serves as the outer surface of the package, with the easy-open sealant layer serving as the inner surface of the package.
AS can be seen clearly in Fig. 1, the rear panel 2 6 of the package 20 includes a fin 38 which extends longitudinally along the back of the package from the top edge to the bottom edge.
The fin 38 iS located approximately midway between the gussetted sides 28 and is formed by portions of the web material contiguous with the vertical marginal edges of the sheet or web which are brought into engagement with each other and are secured to one another via any conventional sealing technique, such as heat sealing or welding. The resultant fin or seam 38 is folded down so it lays substantially flush with the rear wall 2 6 of the package.
The mouth of the bag 20 iS arranged to be initially hermet-ically sealed closed along a transverse, peelable seal line 40 (Figs. 2-4), after the bag~has been filled and vacuumized. The seal line 40 iS formed in a conventional manner and extends across the width of the bag 20 slightly below the top edge 34 to seal the inner surfaces of the abutting front and rear panels to each other between the inner fold lines 28A of the pair of gussets 28. The seal line 40 also seals the marginal portions of the front panel to the abutting portions of the gussetted sides contiguous therewith and seals the marginal portions of the rear panel to the abutting portions of the gussetted sides contiguous therewith. Thus, the seal line 40 serves to isolate the contents of the package from the ambient atmosphere once it is sealed.
CA 02214738 1997-09-0~
In accordance with a preferred embodiment of this invention, the peelable seal line 40 is formed by heat sealing of the abutting easy-open sealant layer portions forming the inner surface of the bag 20. Alternatively, the seal line 40 can be formed in any other conventional manner, e.g., the use of peelable sealing strips like that disclosed in the aforementioned Goglio patents, whose disclosures are incorporated by reference herein.
The lower or bottom end 32 of the bag is sealed closed along a transverse, permanent seam line closely adjacent the bottom edge 36. The permanent seam line is formed using any conventional sealing technique, such as that used for the vertical seamed fin 38.
When the bag 20 is filled, vacuumized, and sealed its contents, e.g., whole bean coffee or chemicals, will be kept isolated from the ambient air by the seal line 40. In order to ensure that the mouth of the bag is resistant to accidental opening, while being able to be readily manually opened (as will be described hereinafter) when desired, the top portion 30 of the package is folded dowrl along a transverse fold line 12A to form a flap 12, such as shown in Fig. 1. The flap 12 is held in place by an elongate bead of adhesive 42 (Fig. 3), e.g., a hot-melt adhesive bead 42 located at the interface of the abutting surfaces. In particular, in the embodiment shown in Fig. 3 the hot-melt adhesive 42 is interposed between the outer surface of the rear panel 26 between its top edge 34 and the fold line 12A (i.e., the portion forming rear surface of the flap 12) and the outer surface of the rear panel immediately below the fold line 12A.
The folded-over flap thus reinforces the peelable seal 40 to prevent it from accidentally peeling apart even when pressure is applied to the packagf-! (as may occur during stacking of plural packages or during rough handling). A strip of tape, such as conventional adhesive tape 14, may be used to hold the flap down on the contiguous portion of the package as shown in Fig. 1.
CA 02214738 1997-09-0~
In order to gain ingress into the package so that some or all of its contents can be~removed, the tape 14 is removed and the free edge of the flap 12 is grasped and pulled outward away from the plane of the portion of the package to which the flap is adhesively secured by adhesive 42. This action breaks the adhesive bead 42 at the flap's interface with the underlying portion of the package, whereupon the flap can be unfolded to the position shown in Fig. 4. The top marginal edges 34 of the front and rear panels of the package can then be grasped and pulled apart in the direction of the arrows in Fig. 4 to peel open the peelable seal line 40, and thereby open the mouth of the package as shown in Fig. 2. The contents of the package can then be poured or otherwise removed through the package's now open mouth.
As mentioned earlier the package 20 is arranged to be reclosed by refolding its flap 12 and adhesively securing the refolded flap in place. To that end, as can be seen clearly in Fig. 2, the embodiment of the package 20 shown therein includes a strip of adhesive tape 44 secured to the front panel between the top marginal edge 34 and the fold line 12A. The strip of tape 44 extends for a substantial width of the front panel 24 and includes an inner surface 44A, and outer surface 44B. The inner surface 44A of the tape strip is fixedly secured to the underlying surface portion of the front panel 24. In order to protect the tape's adhesive outer surface 44B from contamination, e.g., dust, dirt, product residue, etc., until it is ready to be used, a cover or liner strip 46 of at least the same size and shape as the tape strip 44 is releasably secured to the outer surface 44B of the tape strip 44.
In accordance with one preferred embodiment of the invention the adhesive tape is a two-sided adhesive film, such as that sold by Minnesota Mining & Manufacturing Company (3M) under the product designation "3M Double Coated Film Tape #476XL." The liner or cover strip 46 is paper.
Reclosure of the package 20 is effected by merely refolding the top portion of the package along the fold line 12A to reform the flap 14. The liner strip 46 is removed from the tape strip 44, thereby exposing the adhesive outer surface 44B of that strip. The upper portion of the package from the fold line 12A
to the marginal edge of the package, i.e., the portion of the package forming the flap 12, is then folded over itself so that the exposed adhesive surface of the strip engages the rear panel of the package immediately below the marginal edge of the package, to thereby releasably secure the folded over portion in place as shown in Fig. 5. Reopening of the package can be readily achieved by pullirg on the double folded portion of the package to break the adhesion of the interposed tape 44, whereupon the flap 12 can be unfolded and the package's mouth reopened. Reclosure of the package's mouth can be accomplished in a similar manner to that described heretofore, providing that the adhesive outer surface 44B of the tape 44 remains relatively uncontaminated so that it still exhibits adhesive properties.
In order to ensure such action the liner strip 46 (if retained) can be reapplied to the outer surface 44B of the tape strip 44 until reclosure of the package is desired.
In Fig. 6 there is shown an alternative embodiment 22 of the package of this invention. The package 22 is of similar construction to the package 20 except that it is considerably larger in size, and is hence suitable for packaging of large quantities of particulate materials, e.g., agricultural chemical, dry pet foods, etc. Moreover, as will be described hereinafter, the adhesive means for reclosing the package 22 is located on a portion of the package not forming its flap 12.
In the interest of brevity the details of the construction components or portions of the package 22 which are the same as the corresponding portions of the package 20 will not be reiterated. However, those components will be given the same reference numbers. As can be seen in Figs. 8 and 9, the package 22 includes a pair of peelable seal lines 40A and 40B, in lieu of the single peelable seal line 40 of package 20. The adhesive strip for reclosing the m~uth of the bag 22 is similar to the strip 40 of package 20, albeit of a larger size. Thus, as can be seen in Figs. 6-9 the adhesive strip is in the form of a wide strip 44' having an inner surface fixedly secured to the rear panel 26 of the bag below the marginal edge 34 of the folded flap 12. The strip 44' extends for substantially the full width of the rear panel 26 and includes an outer surface which is initially covered by a li~ler or cover strip 46'. The liner or cover strip 46' serves the same purpose as the cover strip 46 of the package 20 and is similarly constructed.
Initial opening of the package 22 is similar to that of package 20 except that there is no tape strip 14 to remove.
Thus, once the flap 12 is lifted up from its position in Figs.
6 and 7 to the position shown in Figs. 8 and 9, the mouth of the bag 22 can be pulled open (peeled apart) by pulling on the upper edges of the front and rear panels of the bag in the direction of the arrows in Fig. 9. The action breaks the peelable seal lines 40A and 40B.
Reclosure of the package 22 is virtually the same as that described with respect to package 20, notwithstanding the fact that the adhesive strip 44' is on the rear panel of the package 22 (whereas the strip 44 of package 20 is the front panel portion of that package's flap). Thus, reclosure of the package 22 is accomplished by merely refolding the top portion of the package 22 along the fold line 12A to reform the flap 12. The liner strip 46' is removed from the tape strip 44' on the rear panel, thereby exposing its adhesive outer surface of that strip. The upper portion of the package from the fold line 12A
to the marginal edge 34 of the package, i.e., the portion of the package forming the flap 12, is then folded over itself and brought into engagement with the exposed adhesive surface of the strip 44' on the rear panel 26 of the package 22, to thereby releasably secure the folded over portion in place.
Reopening of the package 22 can be readily achieved by pulling on the double folded portion of the package to break the adhesion of the interposed tape 44', whereupon the flap 12 can be unfolded and the package's mouth opened. Reclosure of the package's mouth can be accomplished in a similar manner to that described heretofore.
As should be appreciated from the foregoing each package of this invention provides a complete system for opening and CA 02214738 1997-09-0~
closing its peelably openable mouth. Since the peelable closure in the mouth is contained within the folded-over flap, it is hence protected by the flap from accidental opening during shipment and/or storage. When access to the contents of the package is desired, the peelable seal allows the package to be opened without the use of a scissors, knife, or other cutting instrument, by merely pulling the facing portions of the mouth of the package apart from each other. The adhesive securement means, e.g., the tape strip, in combination with the folded flap form a reclosure for the package which is effective to prevent spillage from the interio- of the package, and/or to decrease odor emanation from the contents of the package, and/or to minimize exposing the contents of the package to the ambient atmosphere (air). The use of the cover or liner strip on the adhesive strip until it is ready for use ensures that the adhesive strip is protected from dust, dirt, product residue (e.g., ground coffee), etc. prior to first use thereof.
Moreover, since the adhesive tape strip is prepositioned on the package, misplacement or loss of the strip is precluded and loss of adhesion strength is minimized by preventing migration of the strip.
It must be pointed out at this juncture that the two package embodiments 20 and 22 described heretofore are merely exemplary of many types, ;shapes and construction of packages which can be made in accordance with this invention. Thus, packages may be gussetted or non-gussetted, rectangular, square or any other shape and/or size. The adhesive securement means can comprises one or more strips, patches, etc., of an adhesive material suitable to be permanently placed at any suitable location on the package for holding a folded over flap of the package in a closed state after the package is initially opened.
Thus, the adhesive strip need not be constructed like that described above, nor located in the position(s) described above.
However, the adhesive strip(s) should be provided with some removable means, e.g., a cover or liner sheet/strip, to prevent contamination or loss of adhesive properties prior to use.
CA 02214738 1997-09-0~
Moreover, for some applications the hot-melt adhesive 42 may not be used to hold the flap in place.
Without further elaboration the foregoing will so fully illustrate our invention that others may, by applying current or future knowledge, adopt the same for use under various conditions of service.
Claims (6)
1. A package having an interior for holding material therein, said package being formed of a flexible material and comprising a front panel and a rear panel connected to each other by respective side gussets, each of said panels and said gussets being formed of a material such that when said package is sealed it is capable of maintaining the material within the package under vacuum and having an upper edge and upper edge portions contiguous therewith, said upper edge portions conjoining to form a mouth for said package, said package having first peelable closure means located within said mouth for sealing the interior of the package, and first adhesive means, said upper edge portions of said package being folded over along a fold line to form a flap wherein said upper edge portion of one of said panels abuts another portion of said one of said panels and is releasably secured thereto by second adhesive means interposed therebetween, said second adhesive means being releasable to enable said flap to be unfolded, whereupon said first peelable closure means can be unpeeled to provide access to the interior of the package, said first adhesive means being in the form of an adhesive strip having an inner surface, an outer surface, and a unitary cover sheet removable secured to said outer surface, said adhesive strip extending across a major portion of the width of said package, said inner surface being fixedly secured to one of said panels, said package being arranged to be reclosed by removing said cover sheet as an integral unit from said adhesive strip and folding said upper edge portions of said package along said fold line to reform said flap and then folding said flap over itself to bring a portion of the other of said panels contiguous with the top edge of said package into engagement with a portion of said one of said panels and wherein said adhesive strip is interposed therebetween and in direct engagement with a portion of said other of said panels for releasable securing said portions together.
2. The package of Claim 1 additionally comprising second adhesive means interposed between said abutting portions of said one of said panels for releasably securing said flap in place.
3. The package of Claim 1 wherein said adhesive strip is located on said one of said panels below the position of said upper edge after said flap is formed.
4. The package of Claim 1 wherein said adhesive strip is located on said one of said panels immediately below said top edge thereof.
5. The package of Claim 1 wherein said cover sheet is constructed to prevent the contamination of said adhesive strip while said cover sheet is in place thereon.
6. The package of Claim 2 wherein said cover sheet is constructed to prevent the contamination of said adhesive strip while said cover sheet is in place thereon.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US71133296A | 1996-09-06 | 1996-09-06 | |
| US08/711,332 | 1996-09-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2214738A1 true CA2214738A1 (en) | 1998-03-06 |
Family
ID=24857667
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2214738 Abandoned CA2214738A1 (en) | 1996-09-06 | 1997-09-05 | Gussetted flexible package with easy open folded mouth and adhesive strip for reclosing the mouth after opening |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0827912A2 (en) |
| CA (1) | CA2214738A1 (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6076969A (en) * | 1998-12-01 | 2000-06-20 | Sonoco Development, Inc. | Resealable closure and method of making same |
| FR2829997B1 (en) * | 2001-09-26 | 2004-02-27 | Jpj Internat | BAG CLOSING DEVICE |
| GB0209301D0 (en) * | 2002-04-24 | 2002-06-05 | Simpac Ltd | Re-sealable sack closure |
| FR2847234A1 (en) * | 2002-11-18 | 2004-05-21 | Cetec Ind Conditionnement | Bag with quick opening and repositionable closure has folded over top with perforated line to form pouring spout reclosable by adhesive label |
| SE527110C2 (en) * | 2003-09-24 | 2005-12-27 | Monica Svensson | Packaging for openable closure of goods |
| EP1520801B1 (en) * | 2003-10-03 | 2008-11-12 | NEW MADAPLAST S.r.l. | An airtight bag for vacuum storing an article |
| NL1025987C2 (en) * | 2004-04-20 | 2005-10-24 | Robert Bosch Verpakkingsmachin | Device, assembly and method for manufacturing bags as well as such a bag. |
| WO2008058418A1 (en) * | 2006-11-16 | 2008-05-22 | Zip Pack Ip Ag | Reclosable bag having a security closing device |
| US20090263048A1 (en) * | 2008-04-16 | 2009-10-22 | Iannelli Ii Michael Louis | Bag Structures And Methods Of Assembling The Same |
| CN101659133B (en) * | 2009-01-14 | 2011-06-29 | 陈平 | Production method of garbage storage bag with binding tape and garbage storage bag with binding tape |
| GB2523391A (en) * | 2014-02-24 | 2015-08-26 | Essentra Packaging & Security Ltd | Packaging method and apparatus |
| EP3023242B1 (en) * | 2014-11-21 | 2017-06-14 | PETROPLAST GmbH Chemikalien und Kunststoffe | Packaging film and device and method for manufacturing same |
| DK3326804T3 (en) * | 2016-11-23 | 2019-01-07 | PETROPLAST GmbH Chemikalien und Kunststoffe | Packaging film and device and method for making such |
| CN110589204B (en) * | 2019-10-15 | 2021-03-30 | 东莞职业技术学院 | Fresh food packaging bag made of natural plant fiber and having high freshness retaining degree |
-
1997
- 1997-08-04 EP EP19970305875 patent/EP0827912A2/en not_active Withdrawn
- 1997-09-05 CA CA 2214738 patent/CA2214738A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| EP0827912A2 (en) | 1998-03-11 |
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| Date | Code | Title | Description |
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| FZDE | Dead |