EP1367000A2 - Flexible package having slider closure - Google Patents
Flexible package having slider closure Download PDFInfo
- Publication number
- EP1367000A2 EP1367000A2 EP03253141A EP03253141A EP1367000A2 EP 1367000 A2 EP1367000 A2 EP 1367000A2 EP 03253141 A EP03253141 A EP 03253141A EP 03253141 A EP03253141 A EP 03253141A EP 1367000 A2 EP1367000 A2 EP 1367000A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- rear panels
- flexible package
- fastener tracks
- fastener
- sheet
- 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.)
- Withdrawn
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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
- B65D33/25—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
Abstract
Description
- The present invention pertains to flexible packages, such as plastic bags, and in particular to such packages having fastener closures employing sliders.
- With the recent emphasis in providing consumers with bulk quantities of various commodities, such as food products, reclosable packages have become increasingly popular. One of the most popular means of providing reclosability is to employ fasteners of various types, particularly fasteners which are compatible with flexible packages of plastic film construction. Manufacturers of food products and other commodities are concerned with filling the contents of a flexible package as quickly and economically as possible. It is important that the opening provided by the fastener be made as large as practically possible. Consumers or other end users also prefer large sized openings for easy extraction of products from the package interior. Even with large openings, however, products within the package may interfere with fastener operation when the product poured or otherwise dispensed from the package becomes entrained in the fastener components.
- Other improvements to flexible reclosable packages are being sought. For example, when handling products comprised of numerous small pieces, such as shredded cheese or cereal, for example, it is generally desirable to have the package formed into a pouch which is open at one end, or along one side, so as to allow the product to be poured or shaken through the reclosable opening. It is desirable that the product be allowed to freely flow past the reclosable opening. Preferably, the path taken by the product within the package should be made as smooth as possible.
- Although improvements have been made in the art of plastic welding and joining, manufacturers of consumer products employing high speed production techniques are continually seeking improved package forming methods and equipment. Concern has been focused on the formation of stop members which limit the travel of a sliding closure traveling along fastener tracks. Any reduction in the time needed to form these and other package features can result in substantial cost savings.
- An object of the present invention is to provide a shrouded reclosable package having improved arrangements for automatically filling.
- Yet another object of the present invention is to provide a shrouded reclosable plastic package having a slider fastener with improved snug fit with the package contents in a manner which also optimizes material usage for the package.
- A further object of the present invention is to provide a shrouded plastic bag having a slider fastener with an improved end seal of the fastener tracks.
- These and other objects of the present invention are attained in a reclosable flexible package comprising opposed front and rear panels that have sides joined together to form an interior and a package opening communicating with said interior. The reclosable flexible package has first and second interlockable fastener tracks configurable in an interlocked, closed position and an unlocked open position. It has a slider movable along fastener tracks to configure tracks in interlocked position to close opening and to configure fastener tracks in unlocked position so as to allow access through opening to package interior. The fastener tracks have opposed ends located adjacent, opposed sides of front and rear panels. The stops adjacent the ends of the fastener tracks interfere with and prevent travel of slider beyond fastener tracks. In operation, the fastener tracks are provided in a mated or closed position and are tacked in position as a unitary subassembly, on one of the front or rear panels. Preferably, the front and rear panels are provided as unitary sheet which is folded with one part overlying upon the other to form the opposed front and rear panels. After the fastener tracks are in place, the product is laid on one of the front and rear panels and the remaining panel is folded to overly the product. The peripheral seals are then formed to hermetically seal the product and the fastener track is securely fastened to the front and rear panels. Preferably, the fastener tracks are within the side seals.
-
- FIG. 1 is a perspective view of a flexible package according to principles of the present invention;
- FIG. 2 shows a web supply used in constructing the package;
- FIG. 3 shows a mated fastener track with slider used in making the package;
- FIG. 4 is a top plan view of a film portion taken from the web illustrated in FIG. 2;
- FIG. 5 is a view similar to that of FIG. 4 showing the addition of the fastener track assembly;
- FIG. 6 is a view similar to that of FIG. 5 showing placement of a product prior to folding and final sealing of the package;
- FIG. 7 is a cross-sectional view taken along the line 7-7 of FIG. 1; and
- FIG. 8 is a fragmentary view of an alternative package construction.
-
- Referring now to the drawings, a flexible package illustrating principles of the present invention is generally indicated at 10. Flexible package 10 preferably comprises a plastic bag having front and
back panels side seal 20 and at the right end by aside seal 22.Side seals panels sheet 100 illustrated in FIG. 4. With reference to FIG. 2,sheet 100 is severed from a continuous web or roll ofmaterial 102. - As mentioned, flexible package 10 preferably comprises a
bag having panels panels - As mentioned with reference to FIG. 4, the film sheet is folded about
fold line 114. Initially, the bottom portion of package 10 is terminated at a dead fold, in order to provide the preferred tight fit with the enclosed product. Optionally, thepanels side seals - The upper end of flexible package 10 features a reclosable opening including a
slide fastener arrangement 110 which includesmating fastener tracks slider 30, all preferably of polyolefin material. Theslider 30 is slidable along the fastener tracks, causing the fastener tracks to interlock or mate for closure of the flexible package and to unmate or separate to open the flexible package for access to contents in the package interior. - Referring to FIGS. 1, 3 and 5, the ends of the fastener tracks are deformed to form
stops 68. Preferably,stops 68 are formed by the application of ultrasonically generated heat and pressure to the ends offastener tracks -
Stops 68 are configured for maximum efficiency, having the smallest front elevational surface area (i.e., the surface area visible in FIGS. 1 and 3, for example) which is adequate for containingslider 30 on the fastener tracks. Further details concerning the construction ofend stops 68 may be found in U.S. Patent Application Publication No. US 2002/0154836 A1. - With reference to FIG. 7, the
fastener tracks sealing flanges fastener assembly 110, including the features of the fastener tracks and sealing flanges thereof may be found in the same United States Patent Application Publication No. US 2002/0154836 A1. - Referring to FIG. 5,
fastener assembly 110 is shown "tacked" into position with respect tosheet 100. As indicated in FIG. 5 the entire closure assembly is installed as a unitary component and is attached to one of the two panels of the package. As can be seen from FIGS. 4 and 5,sheet 100 is preferably formed as a mirror image aboutfold line 114. Accordingly, if desired, the sheet could flipped vertically with thepanels - Referring to FIG. 4, lines of
weakness 106 are provided at the top and bottom ofsheet 100 and preferably are formed as material is rolled ontosupply roll 102. In the completed package, the lines ofweakness 106, which are used to separate a shroud portion from the remainder of the package, are located immediately below thefastener assembly 110. - The
fastener assembly 110 is located slightly above the line ofweakness 106 ofpanel 12. When thesheet 100 is folded aboutfold line 114 in preparation for sealing of the package, the lines ofweakness 106 in thepanels notch 120 is formed in the margins ofsheet 100 adjacent each end of the lines ofweakness 106. Preferably, the lines ofweakness 106 are formed by laser score operations preformed on the web stored onroll 102, shown in FIG. 2. - As illustrated in FIG. 1, flexible package 10 includes a shrouded
portion 126 formed as an integral extension ofpanels shroud portion 126 is comprised of free end portions at the top and bottom ofsheet 100. With thepanels fold line 114 the free edges are sealed at atop seal 124 of the package (see FIG. 1) which extends between side seals 20, 22. Referring to FIG. 7,flanges panels panels fastener flanges panels - Referring to FIG. 1, with the
panels notches 120, continuing tearing until the line ofweakness 106 is severed allowing the shroud portion to be removed and thereby exposing thefastener assembly 110. With operation of theslider 30 the fastener tracks are separated and access to the package interior and the product contained therein is attained. - With reference to FIGS. 5 and 7, the sealing
flanges seal portions 130. Preferably, the package 10 is formed without a peel seal between the sealing flanges of the fastener tracks, and accordingly, the sealing flanges of the fastener tracks remain unattached to one another, being attached only at their outer faces to therespective panels panels - Referring again to FIGS. 4 and 5, it can be seen that the right-
hand side seal 22 is substantially wider than theopposed side seal 20. This allows the addition of peg holes 140, 142. The peg holes can be formed by punching before or after the side seals are fully formed, it being preferred that the side seals provide a reliable, complete sealing of the panels. As an alternative, the peg holes 140, 142 can be incorporated into the heat seal tooling used to form the side seals 22. - Referring to FIG. 6, product 150 is shown positioned on
panel 12. Flexible package 10 has found immediate application in the field of sliced cheese packaging, but could be used for a variety of other applications such as the packaging of non-flowable products, such as lunchmeat or cheese in the form of molded blocks. - After the product is placed, the
sheet 100 is folded aboutfold line 114 in the manner indicated by the arrow in FIG. 6 in preparation for a final sealing operation. The individual sealing steps can be carried out in different sequences and can be combined, depending upon the sealing tooling employed. Preferably, sealing of the fastener sealing flanges to theseal areas 130 is completed first to allow a thermal barrier to be inserted between the sealing flanges of the fastener tracks. The side seals and thetop seal 124 are then completed. With flexible packages constructed according to principles of the present invention, a tight package or close fit about product 150 can be attained, even when gas flushing is employed, so as to emulate shrink wrapping. - With reference to FIG. 1, an
optional bottom seal 160 can be added to provide the tight fit. With reference to FIGS. 4-6, thebottom seal 160 of FIG. 1 lies within construction lines 162 ofsheet 100. As those skilled in the art will appreciate, thebottom seal 160 is not needed for a hermetic seal of the product because of the dead fold resulting from folding aboutline 114. The improved tight fitting made possible by the reduced-size of the fastener flanges and other features of the present invention results in less material usage in addition to minimizing head space. - It can be seen from the above, that the present invention provides an improved flexible package offering a number of manufacturing advantages. Flexible packages according to principles of the present invention employ pre-cut fastener assemblies of predetermined length so as to avoid conflict with side seals of the package. The line of weakness, preferably a laser score line for separating the shroud from the remainder of the package is located below, preferably immediately below the fastener tracks. Packages according to principles of the present invention preferably employ flanges of minimal height.
- The drawings and the foregoing descriptions are not intended to represent the only forms of the invention in regard to the details of its construction and manner of operation. Changes in form and in the proportion of parts, as well as the substitution of equivalents, are contemplated as circumstances may suggest or render expedient, and although specific terms have been employed, they are intended in a generic and descriptive sense only and not for the purposes of limitation, the scope of the invention being delineated by the following claims.
Claims (11)
- A reclosable flexible package (10) comprising:a sheet of film material (100) defining a fold line (114) between first and second sheet portions, with said first and said second sheet portions folded in overlying relationship;opposed front and rear panels (12, 14) having top edges, bottom edges and a pair of opposed sides joined together to form an interior and a package opening communicating with said interior;said front and said rear panels (12, 14) comprising said first and said second sheet portions;first and second interlockable fastener tracks (26, 28) configurable in an interlocked, closed position and an unlocked open position;a slider (30) movable along said fastener tracks (26, 28) to configure said tracks (26, 28) in said interlocked position so as to close said opening and to configure said fastener tracks (26, 28) in said unlocked position so as to allow access through said opening to said package interior;said fastener tracks (26, 28) located between said top and said bottom of said front and said rear panels (12, 14) and having opposed ends located adjacent said opposed sides of said front and said rear panels (12, 14) and having sealing flanges (27, 29) secured to said front and said rear panels (12, 14), respectively;stops (68) adjacent said ends of said fastener tracks (26, 28) to interfere with and prevent travel of said slider (30) beyond said fastener tracks (26, 28);side seals (20, 22) joining together opposed sides of said front and said rear panels (12, 14);a top seal (124) joining tops of said front and said rear panels (12, 14), extending between said side seals (20, 22);a shroud (126) comprising portions of said front and said rear panels (12, 14) covering said slider (30) and at least the major portion of said fastener tracks (26, 28);weakening portions (106) extending adjacent said fastener tracks (26, 28) for severing of said shroud (126) in preparation for removal of said shroud (126) from the remainder of said reclosable flexible package (10); anda bottom seal (160) joining bottoms of said front and said rear panels (12, 14) adjacent said fold line (114), between said side seals (20, 22).
- A reclosable flexible package (10) according to claim 1, wherein said weakening portion includes a line of weakness (106) extending along at least the portion of said fastener tracks (26, 28).
- A reclosable flexible package according to claim 1 or claim 2, wherein said line of weakness (106) extends along the substantial entirety of said fastener tracks (26, 28).
- A reclosable flexible package according to any one of claims 1 to 3, wherein said line of weakness (106) extends across substantially the entire extent of said reclosable flexible package (10).
- A reclosable flexible package according to any one of claims 1 to 4, wherein said weakening portion (106) includes a tear-start feature (120) formed in one side of said reclosable flexible package (10) to initiate tearing of said reclosable flexible package (10).
- A reclosable flexible package according to claim 5, further comprising a line of weakness (106) extending along said fastener tracks (26, 28), cooperating with said tear-start feature (120) to tear said reclosable flexible package (10), allowing said shroud (126) to be removed from the remainder of said reclosable flexible package.
- A method of making a reclosable, flexible package (10) for a non-flowable product (150), comprising:providing a sheet of film material (100) including front and rear panels (12, 14);providing first and second interlocking fastener tracks (26, 28) configurable between closed and open positions;providing a slider (30);attaching the slider (30) to said first and said second interlocking fastener tracks (26, 28) for sliding along said tracks (26, 28) to move said interlocking fastener tracks (26, 28) between said open and said closed positions;said slider (30) and said first and said second interlocking fastener tracks (26, 28) together comprising a fastener assembly (110);attaching said fastener assembly (110) to one of said front and said rear panels;placing the non-flowable product (150) on one (12) of said front and said rear panels (12, 14);folding said sheet (100) to place said front and said rear panels (12, 14) in overlying relationship;securing said fastener tracks (26, 28) to said front and said rear panels (12, 14); andforming peripheral seals (20, 22, 124, 160) joining the top and bottom edges and said sides of said front and said rear panels (12, 14).
- A method according to claim 7, wherein the step of providing a sheet (100) comprises the step of providing a roll (102) of sheet material and severing a sheet portion (100) from said roll (102).
- A method according to claim 7 or claim 8, further comprising the step of forming weakening portions (106) extending between the side seals (20, 22) of said front and said rear panels (12, 14).
- A method according to claim 9 wherein said step of forming the weakening portions (106) is carried out before said sheet portion (100) is cut from said roll (102).
- A method according to claim 9 or claim 10, wherein folding said sheet (100) places the weakening portions (106) in said front and said rear panels (12, 14) in overlying relationship.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US155401 | 2002-05-23 | ||
US10/155,401 US20030219176A1 (en) | 2002-05-23 | 2002-05-23 | Flexible package having slider closure |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1367000A2 true EP1367000A2 (en) | 2003-12-03 |
EP1367000A3 EP1367000A3 (en) | 2004-01-14 |
Family
ID=29419605
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03253141A Withdrawn EP1367000A3 (en) | 2002-05-23 | 2003-05-20 | Flexible package having slider closure |
Country Status (3)
Country | Link |
---|---|
US (1) | US20030219176A1 (en) |
EP (1) | EP1367000A3 (en) |
CA (1) | CA2428942A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1541480A1 (en) * | 2003-12-08 | 2005-06-15 | Kraft Foods Holdings, Inc. | Shrouded flexible packages |
US8122687B2 (en) | 2003-07-31 | 2012-02-28 | Kraft Foods Global Brands Llc | Method of making flexible packages having slide closures |
Families Citing this family (8)
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US6769229B2 (en) * | 2001-08-30 | 2004-08-03 | Kraft Foods Holdings, Inc. | Method for manufacturing flexible packages having slide closures |
US7052181B2 (en) * | 2003-06-11 | 2006-05-30 | S.C. Johnson Home Storage, Inc. | Zippered bag having a pair of fastener strips |
US20050194282A1 (en) * | 2004-03-08 | 2005-09-08 | Curwood, Inc. | Reclosable thermoformed flexible packages and method of making same |
US7364362B2 (en) * | 2004-06-17 | 2008-04-29 | Illinois Tool Works Inc. | Header end tack seal for reclosable package |
WO2008019385A1 (en) | 2006-08-08 | 2008-02-14 | Kellogg Company | Flexible container for pourable product |
US7621105B2 (en) * | 2006-08-23 | 2009-11-24 | Illinois Tool Works Inc. | Method of producing high burst zipper assemblies for large reclosable packages |
US20090129707A1 (en) * | 2007-11-15 | 2009-05-21 | Illinois Tool Works Inc. | Reclosable package with zipper and slider in the fin seal |
US10427851B2 (en) * | 2010-12-30 | 2019-10-01 | Mark Steele | Package with heat score |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8122687B2 (en) | 2003-07-31 | 2012-02-28 | Kraft Foods Global Brands Llc | Method of making flexible packages having slide closures |
EP1541480A1 (en) * | 2003-12-08 | 2005-06-15 | Kraft Foods Holdings, Inc. | Shrouded flexible packages |
Also Published As
Publication number | Publication date |
---|---|
EP1367000A3 (en) | 2004-01-14 |
US20030219176A1 (en) | 2003-11-27 |
CA2428942A1 (en) | 2003-11-23 |
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