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Publication numberUS3420433 A
Publication typeGrant
Publication dateJan 7, 1969
Filing dateAug 7, 1967
Priority dateAug 7, 1967
Publication numberUS 3420433 A, US 3420433A, US-A-3420433, US3420433 A, US3420433A
InventorsBostwick Robert
Original AssigneeUnion Carbide Corp
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Flat bag and overflapped adhesive tape closure therefor
US 3420433 A
Abstract  available in
Images(1)
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Claims  available in
Description  (OCR text may contain errors)

Jan. 7, 1969 R; BOSTWICK 3,

FLAT BAG AND OVERFLAPPED ADHESIVE TAPE CLOSURE THEREFOR Filed Aug. 7, 1967 INVENTOR R0 RT OSTWICK 3' BY B I I United States Patent ()fiice 3,420,433 Patented Jan. 7, 1969 3,420,433 FLAT BAG AND OVERFLAPPED ADHESIVE TAPE CLOSURE THEREFOR Robert Bostwick, Somerville, N .J., assignor to Union Carbide Corporation, a corporation of New York Filed Aug. 7, 1967, Ser. No. 658,731 US. Cl. 229-80 4 Claims Int. Cl. 365d 33/20; B65d 83/00 ABSTRACT OF THE DISCLOSURE A flat bag of the type used for packaging sandwiches and the like is provided with a closure flap extending from the rear wall and having an adhesive applied thereto for sealing the flap to the front wall of the bag. The closure flap is folded or overflapped upon itself to form a protective enclosure for the adhesive prior to use of the bag. The overflapped closure prevents the adhesive from becoming inadvertently adhered to an exterior object and, in particular, adjacent bags in a dispensing carton.

This invention relates to flat bags of thin flexible sheet material. More particularly, the invention relates to a flat bag of the type used for packaging sandwiches and the like, and to a novel and improved adhesive type closure for sealing the bag.

Background the invention A flat bag as the term is used herein consists essentially of two superimposed front and rear wall members which are joined together at the edges thereof except at one edge which is left open to constitute a bag mouth. Flat bags of this invention are adapted especially for use in packaging sandwiches and other food products, and are preferably made from thin transparent flexible plastic film material.

Bags of this type and especially sandwich bags for packaging freshly prepared sandwiches, pasteries, bread and the like have now become a common item of commerce. 'Because of the perishable nature of the food or other products to be packaged, these bags have usually been provided with a closure for sealing the bags. One type of closure that has been widely used consists of a flap extending from the rear wall of the bag which is adapted to be drawn down over the bag mouth and onto the front wall in order to close the bag. With this type of bag closure, it has become customary to apply an adhesive to the flap for adhering the flap to the front wall of the bag.

While this type of bag closure has proven to be simple and convenient to use, the bags nonetheless have been plagued by certain difficulties. One principal difficulty has been that of packaging the bags within a dispensing carton and particularly one of the type wherein the bags are stacked together or placed adjacent to one another within the carton. With this type of dispensing carton the bags have had a tendency to become adhered to one another through the adhesive and thus it has been difficult to dispense one bag at a time from the carton. Furthermore, dispensed from the carton, the bags may often become inadvertently adhered to some exterior object, thus making it difficult to use the bags.

Summary of the invention The invention proposes to overcome these dilficulties and to generally improve upon the construction of fiat bags of the type provided with a closure flap extending from the rear wall and having an adhesive applied thereto for sealing the flap to the front wall of the bag.

This is accomplished according to the invention by providing the bag with an overfiap closure which protects the adhesive from contact with an exterior object and, in particular, adjacent bags in a dispensing carton. Thus the bag is provided with a closure flap extending from the rear wall and having an adhesive preferably located near the bottom edge of the flap, which adhesive is adapted to secure the flap to the front wall of the bag. In constructing the bag, the flap is folded upon itself in such manner that the adhesive is disposed between overlying portions of the flap and thus protected from becoming adhered to adjacent bags in a dispensing carton and once dispensed from the carton, from becoming inadvertently adhered to an exterior object during use of the bag.

To use the bag, the closure flap is simply separated and then drawn down over the bag mouth and onto the front wall where it is secured by the adhesive.

The novel features, objects, and advantages of the invention will be more clearly understood from the following description of preferred embodiments thereof when read in connection with the accompanying drawing.

Brief description of the drawing FIGURE 1 is an elevational view of a fiat sandwich bag embodying the invention, showing the closure flap partially separated to illustrate its construction in greater detail;

FIGURE 2 is a cross-section view of the bag taken along the lines 22 of FIGURE 1;

FIGURE 3 is a perspective cut-away view of the bag showing a sandwich packaged within the bag and the closure flap secured to the front wall in order to close the bag; and

FIGURE 4 is a perspective, cut-away view of a typical dispensing carton for packaging a number of flat sandwich bags of the invention.

Description 0 the preferred embodiments Although the invention is applicable to a number of different types of flat bags, the novel features and advantages thereof are particularly useful in flat sandwich bags of the type used for packaging freshly prepared sandwiches, pastries, bread and other food products. With this in mind, the preferred embodiments of the invention will now be described in connection with the flat sandwich bag illustrated in the several figures of the accompanying drawing.

Referring now to FIGURES 1-3, there is illustrated the preferred embodiments of a flat sandwich bag of the invention. As illustrated, thebag is formed of two flat superimposed front and rear wall members 10, 12 which are made from a thin flexible plastic film material. Both the front and rear walls 10, 12 overlie one another in a substantially flatwise manner and are joined together at the peripheral edges except at the top edge which is left open to constitute a bag mouth as indicated at 14. The bag is preferably made from a single sheet or web of the plastic film material such as a polyethylene film, for example, which is folded upon itself along a fold line at the bottom of the bag and then joined at the opposite edges suitably by heat sealing the plastic film as shown at 16, 18

As illustrated in FIGURE 3, the bag is provided with a closure flap 20 for sealing a sandwich 22 or other food product within the bag. The closure flap 20 may be formed by an extension of the rear wall 12 beyond the top of the bag a sufficient distance so that the flap 20 may be drawn down over the bag mouth 14 after the sandwich 22 has been placed within the bag, and then folded onto a substantial portion of the front wall 10 of the bag. In order to secure the closure flap 20 to the front wall 10, an adhesive is applied to the underneath side of the flap 20 preferably in the form of a continuous adhesive stripe 24 extending across the full width of the flap 20. Although the continuous adhesive stripe 24 is preferred for use in the bag, the adhesive may be provided in other forms such as a discontinuous stripe or a single adhesive patch applied to the underneath side of the flap 20. Preferably, the adhesive stripe 24 is applied in close proximity to the lower edge of the closure flap 20, leaving a free end 26 for grasping by the user when it is desired to open the bag.

The adhesive which is used to secure the closure flap 20 to the front wall of the bag is preferably of the pressure-sensitive type. With a pressure-sensitive adhesive, it is a simple matter to seal the bag by applying pressure with the users finger across the full width of the closure flap after it has been folded onto the front wall 10 of the bag.

Suitable pressure-sensitive adhesives for use in the bag include acrylic, natural and synthetic rubber and poly (vinyl ether) types. The adhesive may be applied to the closure flap 20 to a controlled thickness of approximately 0.2 mil suitably by conventional fiexographic printing techniques known in the art.

According to the novel features of the invention, the closure fiap 20 during assembly of the bag is folded upon itself to form an overfiap at the top of the bag located just above the bag mouth 14 as generally indicated at 28 in FIGURES 1 and 2. This overflap closure is formed by folding approximately the lower half of the closure fiap 20 containing the adhesive stripe 24 against the underneath side of the upper half such that the adhesive stripe 24 is completely disposed between the folded portions of the flap 20. In constructing the bag, it is preferred that the lower half of the flap 20 be made somewhat shorter in length such that the free end 26 of the fiap 20 is disposed above the bag mouth 14. In this manner, the free end 26 of the closure flap 20 is placed in a readily accessible position for grasping by the user.

By forming the folded overfiap closure of the invention, it will be seen that a protective enclosure is provided for the adhesive which is used to adhere the closure flap 20 to the front wall 10 when it is desired to close the bag. This protective enclosure protects the adhesive from coming into contact with adjacent bags when packaged within a dispensing carton and from inadvertently contacting any exterior object once the bag is removed from the carton.

Another important advantage of the invention resides in the fact that the adhesive is not exposed until the moment of use. During assembly of the bag, the adhesive is made to adhere firmly to the superimposed portion of the folded closure flap 20. With a pressure-sensitive adhesive this is easily accomplished by simply applying pressure across the folded lower half of the flap 20. Since the adhesive is completely disposed between the superimposed portions of the flap 20, it is effectively shielded from exposure to the atmosphere and is thus not subject to deterioration or loss of tenacity during the period in which the bag is stored within the dispensing carton prior to use.

FIGURE 4 shows the construction of a typical dispensing carton for flat sandwich bags embodying the invention. The carton is of rectangular shape and has an elongated dispensing slot 30 located within the top and adjacent to the front edge of the carton for withdrawal of the bags. Opposed semi-circular cutouts 32, 34 are provided within the top and front side of the carton to facilitate grasping the bags by the user. Within the carton the individual bags are stacked together one on top of the other as indicated at 36 and then folded around one edge of an acuate core 38 within the top of the carton.

When it is desired to dispense a bag from the carton, the user need only insert his two index fingers through the semi-circular cut-outs 32, 34 and grasp one bag and then withdraw the bag through the dispensing slot 30 and from the carton. Since the bag construction is such that the adhesive type closure cannot cause adjacent bags to become adhered together within the carton, there is no difficulty in dispensing one bag at a time from the carton.

To use the bag after it has been dispensed from the carton, it is a simple matter to disassemble the folded overfiap closure of the invention by pulling the free end 26 of the flap 20 upward in order to separate the adhesive 24 and to expose the full closure flap 20 for use in sealing the bag. The sandwich or other food product to be packaged is then placed within the bag and the closure flap 20 is drawn down over the bag mouth 14 and onto the front wall of the bag. Pressure is then applied by the users finger across the full width of the closure flap 20 in order to adhere the adhesive 24 to the front wall 10 and thus seal the bag.

What is claimed is:

1. A flat bag of the type used for packaging sandwiches and other food products which comprises two superimposed wall members of a thin, flexible, plastic material joined together at the peripheral edges thereof and having an open bag mouth, a closure flap extending from one wall member beyond said bag mouth and adapted to be drawn down over said bag mouth and onto the other wall member in order to seal the bag, and a pressure sensitive adhesive applied to the underneath side of said closure flap for adhering said flap to said wall member, said closure flap being folded upon itself with said adhesive disposed on one overlying superimposed portion adhering to the other superimposed portion of the folded flap completely enclosing said adhesive and protecting it from contact with an exterior object.

2. In a bag dispensing carton containing aplurality of flat plastic bags used for packaging sandwiches and other food products wherein the bags are packaged in fiatwise manner one on top of the other, the improvement in combination therewith of a fiat bag construction for each bag in the carton facilitating removal of one bag at a time from the carton, said flat bag construction comprising a bag body formed from a single sheet of thin, flexible plastic material folded upon itself to form two flat superimposed wall members, the opposite side edges of said wall members being joined together with one edge left open to constitute a bag mouth, a closure flap formed by an extension of one wall member beyond said bag mouth which is adapted to be drawn down over said bag mouth and onto the other wall member in order to seal the bag, a pressure sensitive adhesive provided on the underneath side of said closure flap in the form of a continuous adhesive strip extending across the full width of said closure flap, said continuous adhesive strip being disposed in close proximity to the lower edge of said closure flap but leaving a free end for grasping by the user, said closure flap being folded upon itself with said continuous adhesive strip disposed on one overlying superimposed portion adhering to the other superimposed portion of the folded flap completely enclosing said continuous adhesive strip and protecting it from contact with adjacent bags in the carton.

3. A fiat bag as defined by claim 1 wherein said adhesive is provided in the form of a continuous stripe applied across the full width of said closure flap.

4. A fiat bag as defined by claim 3 wherein said continuous adhesive stripe is applied in close proximity to the lower edge of said closure flap leaving a free end for grasping by the user.

References Cited UNITED STATES PATENTS 2,367,440 1/1945 Schieman 2298O 3,151,803 10/1964 Kaminski 229 3,348,762 10/1967 Kasinkas 22980 DAVID M. BOCKENEK, Primary Examiner.

US. Cl. X.R. 22962 Patent No. 3,420,433 January 7, 19E

Robert Bostwick rtified that error appears in the above identified It is ce nt are hereby corrected as patent and that said Letters Pate shown below:

In the heading to the drawing and printed specification, title of inventi: "FLAT BAG AND OVERFLAPPED ADHESIVE TAPE CLOSURE THEREFOR", each occurrence, should read FLAT BAG AND OVERFLAPPED ADHESIVE TYPE CLOSURE THEREFOR Column 1, line 63, before "dispensed" insert once Signed and sealed this 10th day of March 1970.

"(SEQ Attest:

WILLIAM E. SCHUYLER, JR.

Edward M. Fletcher, Jr.

Commissioner of Patents Attesting Officer

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2367440 *Oct 5, 1942Jan 16, 1945Internat Plastic CorpSelf-sealing paper envelope
US3151803 *May 29, 1962Oct 6, 1964Int Minerals & Chem CorpReusable mailing device
US3348762 *Jul 22, 1966Oct 24, 1967Scott Paper CoHousehold bag construction
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3926365 *Jun 10, 1974Dec 16, 1975Sklaris Ii IncReceptacle for coins, currency and the like
US4216863 *Mar 20, 1979Aug 12, 1980A. J. Bingley LimitedBag pack
US4276982 *Apr 10, 1979Jul 7, 1981Arvey CorporationPressure sensitive tape closure pouch
US4410130 *Dec 30, 1981Oct 18, 1983Mobil Oil CorporationProtective strip for Z-fold bag closure
US4502599 *Apr 2, 1984Mar 5, 1985Minnesota Mining And Manufacturing CompanyPackage and method of packaging resealable plastic bags
US4512476 *Dec 29, 1983Apr 23, 1985Mobil Oil CorporationPlastic bag dispenser
US4513445 *Dec 27, 1982Apr 23, 1985Union Carbide CorporationAdhesive closure bags and method for producing same
US4519095 *Dec 9, 1983May 21, 1985Mobil Oil CorporationAdhesive channel closure for flexible bags
US4581007 *Dec 7, 1984Apr 8, 1986Union Carbide CorporationAdhesive closure bags and method for producing same
US4603434 *Jul 17, 1984Jul 29, 1986Mobil Oil CorporationRipple lock closure for flexible bags
US4648513 *Sep 27, 1985Mar 10, 1987Kimberly-Clark CorporationPackage and disposal container including plural tear portions
US4690392 *Sep 27, 1985Sep 1, 1987Xerox CorporationEnvelope configuration for use in a high speed copier with envelope printing capability
US4708248 *Feb 10, 1986Nov 24, 1987Davis George HCollapsible food and beverage container
US4785940 *Jul 2, 1987Nov 22, 1988Minnesota Mining And Manufacturing CompanyFlexible bag with a pressure sensitive adhesive closure strip
US4790670 *Jan 11, 1985Dec 13, 1988Poly-Pak Industries, Inc.Bag with closeable flap and method of manufacturing same
US5014852 *Jan 11, 1990May 14, 1991Mobil Oil Corp.Pad of bags
US5139142 *Dec 11, 1990Aug 18, 1992Dexterity, Inc.Disposable toothbrush cover
US5348399 *Dec 23, 1992Sep 20, 1994Dematteis Robert BPlastic bags with waveform edge configurations
US5509570 *Sep 19, 1994Apr 23, 1996Dematteis; Robert B.Dispenser of plastic bags
US5716135 *Jan 26, 1996Feb 10, 1998Campbell; Wilson S.Shopping bag having restraining tabs and an associated method
US6290120 *Dec 24, 1998Sep 18, 2001Ontario Inc. Cob As PepClosure system
US6405869 *Jul 1, 1999Jun 18, 20022Wit, LlcShrink wrap gift bag and method of manufacturing the same
US6575301 *Jul 16, 2001Jun 10, 2003Ebrahim SimhaeePlastic bag package
US6601706Sep 28, 2001Aug 5, 2003Kimberly-Clark Worldwide, Inc.Package for absorbent articles
US6681934Nov 13, 2001Jan 27, 2004Kimberly-Clark Worldwide, Inc.Package having visual indicator
US6705465Nov 13, 2001Mar 16, 2004Kimberly-Clark Worldwide, Inc.Package for feminine care articles
US6708823Nov 13, 2001Mar 23, 2004Kimberly-Clark Worldwide, Inc.Master package
US6913146Nov 9, 2001Jul 5, 2005Kimberly-Clark Worldwide, Inc.Interlabial pad packaging
US7033077 *Jun 3, 2003Apr 25, 2006Peter TaylorSealable bags made of plastics or other materials and method of making plastic sheeting for manufacturing sealable bags
US7178671Nov 13, 2001Feb 20, 2007Kimberly-Clark Worldwide, Inc.Package
US8052673 *Jul 15, 2005Nov 8, 2011Astra Tech AbFolded catheter assembly with adhesive grip
US8235965 *Aug 25, 2009Aug 7, 2012Baxter International, Inc.Embedded access dual chamber bag
US20020060167 *Nov 13, 2001May 23, 2002Nichols Ann M.Package
US20030089633 *Nov 9, 2001May 15, 2003Kimberly-Clark Worldwide, Inc.Interlabial pad packaging
US20040001652 *Jun 24, 2003Jan 1, 2004Cryovac, Inc.Packaging bag, and method of and apparatus for manufacturing the same
US20040013322 *Jun 3, 2003Jan 22, 2004Peter TaylorSealable bags made of plastics or other materials and method of making plastic sheeting for manufacturing sealable bags
US20040149614 *Jan 20, 2004Aug 5, 2004Kimberly-Clark Worldwide, Inc.Interlabial pad packaging
US20050225072 *Apr 13, 2004Oct 13, 2005Timothy ElwellProtective dust jacket cover and method of use
US20080200907 *Jul 15, 2005Aug 21, 2008Astra Tech AbFolded Catheter Assembly With Adhesive Grip
US20090229717 *Mar 11, 2008Sep 17, 2009Thor HalsethApparatus and system and method of providing easy protection to patrons holding multi-use pagers and the placement of advertising media thereon
US20100049158 *Aug 25, 2009Feb 25, 2010Baxter International Inc.Embedded access dual chamber bag
US20130200094 *Mar 15, 2013Aug 8, 2013Blue Shoe Innovations, LlcBeverage and food carrier and dispensing systems therefor
DE102012107671A1 *Aug 21, 2012Jun 12, 2014Eller Foodpackaging GmbhBeutel zur Aufnahme eines Brötchens, Sandwiches oder dergleichen
EP0120161B1 *Nov 15, 1983Jul 24, 1991Lmg Smith Brothers LimitedPouches
WO1994014671A1 *Dec 23, 1993Jul 7, 1994Dematteis Robert BPlastic bags, dispenser, and blades for perforating the bags
Classifications
U.S. Classification229/80, 206/554, 383/62, 383/86
International ClassificationB65D33/20, B65D33/18
Cooperative ClassificationB65D33/20
European ClassificationB65D33/20
Legal Events
DateCodeEventDescription
Oct 8, 1986ASAssignment
Owner name: UNION CARBIDE CORPORATION,
Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:MORGAN BANK (DELAWARE) AS COLLATERAL AGENT;REEL/FRAME:004665/0131
Effective date: 19860925
Jan 9, 1986ASAssignment
Owner name: MORGAN GUARANTY TRUST COMPANY OF NEW YORK, AND MOR
Free format text: MORTGAGE;ASSIGNORS:UNION CARBIDE CORPORATION, A CORP.,;STP CORPORATION, A CORP. OF DE.,;UNION CARBIDE AGRICULTURAL PRODUCTS CO., INC., A CORP. OF PA.,;AND OTHERS;REEL/FRAME:004547/0001
Effective date: 19860106