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Publication numberUS3334805 A
Publication typeGrant
Publication dateAug 8, 1967
Filing dateOct 22, 1965
Priority dateOct 22, 1965
Publication numberUS 3334805 A, US 3334805A, US-A-3334805, US3334805 A, US3334805A
InventorsHalbach Robert W
Original AssigneeHalbach Robert W
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Plastic bag closure
US 3334805 A
Abstract  available in
Images(1)
Previous page
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Claims  available in
Description  (OCR text may contain errors)

Aug. 8,V 1967 R. w. HALBACH 3,334,805

PLASTIC BAG CLOSURE Filed oct, 22, 1965 /A/VENTOR: ROBERT W. HALBACH,

United States Patent O 3,334,805 PLASTIC BAG CLOSURE Robert W. Halbach, 415 WCU Bldg., Quincy, Ill. 62301 Filed Oct. 22, 1965, Ser. No. 501,215 3 Claims. (Cl. 229-62) This invention relates to a plastic bag closure and particularly to a closure that is so effective in closing a plastic bag that it locks the bag closed and, in so doing, seals the closed area in an airtight and watertight lock.

Plastic bags have become popular for use to contain various products, including foods. The plastic bags have various potential advantages over paper bags which include the properties of being airtight, watertight, and strong. Also, the plastic is transparent so that its contents can -be visually examined. These potential advantages are usually lost, however, because of the absence of a satisfactory and effective closure device for the bag. If the closure is ditlicult to operate, persons will not bother to use it. If it tears the plastic, it will limit the life of the container and probably will not produce a watertight and airtight closure.

The principal object of this closure device is designed to achieve the foregoing desired results.

In general, the enclosure comprises a clip of plastic or similar material permanently attached to the plastic bag. The clip is bifurcated to provide areas with a space -between them. The clip is attached to the bag in such a way that the arms project away from the bag.

The closure is used by twisting the end of the bag, as is so often done in attempts to close a bag, and then passing the twisted portion between the prongs of the bifurcated clip to lock the bag in the twisted condition. The result of this clip is that a twisted portion remains in twisted condition because of this lock, and it is an object of the invention to provide a closure device that automatically assures that a portion of a twisted part of the bag will remain twisted after the lock is set in place. This object is accomplished because the length of the clip to its free end is such that a portion of the twisted area must be trapped between the point of attachment of the clip and the free end.

In addition to the foregoing, objects of this invention are to provide a positive and automatic closure device for a plastic bag that closes the bag in an airtight and watertight lock that is inexpensive, that is easy. to use and understand, and that does not rip the plastic bag material.

Other objects and advantages will be apparent to those skilled in the art.

In the drawing:

FIGURE l is a plan view of a bag with this closure device, showing the bag in attened condition without any contents;

FIGURE 2 is an enlarged view in section taken along the line 2 2 of FIGURE l;

FIGURE 3 is an enlarged view in section taken along the line 3 3 of FIGURE l;

FIGURE 4 is an enlarged View in section taken along the line 4-4 of FIGURE 1;

FIGURE 5 is an enlarged isometric view of the closure clip;

FIGURE 6 is a reduced scale side elevation view of the bag and closure clip, partly shown in section, showing a sample loaf of bread, before closing the bag;

FIGURE 7 is a view similar to that of FIGURE 6, but showing the intermediatestep of closing the bag wherein the end of the bag is twisted but the closure is not set in place; and

FIGURE 8 is a side elevation view similar to FIGURE 6 but showing the bag completely closed and locked.

Referring to the drawing, the bag 10 may be of any size and shape and may be made of any of the usual plastics that are employed for this purpose. This bag has `a generally sleeve-like side wall 11 closed at the bottom 12 by a suitable sealer means 13, usually a heat seal. The upper end 14 is open to permit introduction of articles into the bag 10.

A clip 16 is fastened to the side 12 of the bag 10.*The clip 16 has a base 17 and sides 18 and 19 that are separated by a central cutaway portion defining spaced parallel inner edges 20 and 21 which meet diverging edges 22 and 23 in curved intersections 24 and 25, respectively. The edges 22 and 23 intersect parallel outer side edges 26 and 27 in curved intersections 28 and 29, Irespectively. The clip 16 is preferably made of a relatively stil plastic but it may be made of other similar suitable materials which are suiciently rigid and long lasting to perform the function to be described. As FIGURE 1 shows, the clip 16 is fasterned to the side 12 near its base 17. It may .he fastened by glue or -by a suitable tape 35, or it may be bonded with heat or chemical.

The drawing shows the clip 16 attached adjacent the edge 14 of the open end of the bag 10, and this is the preferred position because it provides maximum capacity for the bag 10. However, the clip 16 may be attached at other places to perform its function now to Ibe described.

To use this bag 10, and the clip 16, the bag is filled with its intended contents. In the illustration, there is a loaf of bread 30 in the bag 10, and it is desired to close the open end 14 of the bag and to lock that end in an airtight and watertight condition until such time as the bag is opened for access to its contents. Use of the closure of this invention is very simple. The portion 31 of the bag 10 between the clip 16 and the contents 30 is twisted as shown in FIGURE 7 and as it conventionally done in efforts to close bags. Then, the clip 16 is moved into a position which will permit p-art of the twisted portion 31 to enter the space between the edges 20 and 21. Because the clip is attached adjacent its base 17 to the side 11 of the bag 10, this necessarily requires the positioning of a portion 32 of the twisted portion 31 between the edge 17 of the clip and the space between the edges 20 and 21, as shown in FIGURE 8. When the twisted portion 31 is pressed tightly between the prongs 18 and 19, this portion 32 remains twisted and cannot become untwisted because it is locked between the spaced parts of the clip 16. FIGURE 8 also shows a portion of the bag twisted below the clip 16. This part may automatically un-roll when the clip 16 is freed. That is what happens to conventional bags when they are twisted. However, the portion 32 is locked in the twisted condition, and the bag is therefore closed in an airtight and watertight condition.

'Ihe converging edges 22 and 23 are yfeatures of the invention because they provide a wide entry for the twisted part of the bag 30 into the space Kbetween the prongs 18 and 19. The curved ends 28 and 29 prevent puncturing of the bag 10. The edges 22 and 23 meet the edges 20 and 21 in smooth converging edges 24 and 25 to guide the twisted portion of the bag into the locking area between the edges 20 and 21 without puncturing the bag.

To gain access to the bread 30, the clip 16 is simply pulled free of the twisted portion 31 and the bag is opened. It can be closed thereafter by twisting again and replacing the clip 16. Since the clip does not puncture the bag or tear the bag, it may be used many times. Because the clip is attached near its base 17, it is impossible to fail to trap a twisted portion 30= of the bag to get the desired lock.

Various changes and modications may be made within the purview of this invention aswillwbe readily apparent to those skilled in the art. Such changes and modiications are within the scope and teaching of this invention as defined -by the claims appended thereto.

What is claimed is:

1. A -bag of flexible twistable material having an open end, and a clip for closing the open end, the clip cornprising a relatively rigid member having parts dening a space for receiving and releasably locking therebetween a twisted portion of the bag, the clip being attached to the side of the bag thereby enabling locking of a twisted portion of the bag between the place on the bag of attachment of the clip to the bag and the place on the bag received within the space of the clip.

2. The combination of claim 1 wherein the clip is attached to the side of the bag adjacent the base of the clip located remotely opposite the said space.

3. The clip of claim 1- wherein the space of the clip is defined by opposing generally parallel edges with a divergent entrance to the space between the parallel edges.

References Cited UNITED STATES PATENTS 2,973,131 2/1961 Mead et al. 229--66 3,164,249 l/ 1965 Paxton 206-56 3,233,821 2/1966 Ehlers I229--66 FOREIGN PATENTS 571,439 3/ 1959 Canada.

JOSEPH R. LECLAIR,v Primary Examiner. D. M. BOCKENEK, Assistant Examiner.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2973131 *May 26, 1958Feb 28, 1961Nat Agricultural Supply CompanBag for sampling milk and the like
US3164249 *Mar 7, 1961Jan 5, 1965Paxton Floyd GBag closures united in strip form
US3233821 *Jul 22, 1964Feb 8, 1966William Ehlers OttoPackage opening device
CA571439A *Feb 6, 1957Mar 3, 1959Charles J TudorTie for bags
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3417864 *Aug 24, 1967Dec 24, 1968Jerre H. PaxtonFlexible plastic bag stack, individual bags of which are provided with respectively echeloned sheet plastic closure facilities
US3417912 *Apr 10, 1967Dec 24, 1968Jerre H. PaxtonPlastic bag with integral closing facility
US3945086 *Feb 15, 1974Mar 23, 1976Hoard Bert VClosure device
US4408643 *Feb 6, 1981Oct 11, 1983Vonco Products, Inc.Plastic bags having a pressure resistant closure
US4610039 *Jan 17, 1985Sep 9, 1986Stern Leif EWaste container
US5040903 *Sep 28, 1989Aug 20, 1991Morgan Adhesives CompanyReclosable flexible container and method of reclosing
US5238631 *Jun 30, 1989Aug 24, 1993Kyowa LimitedProcess of making non-metallic polymeric twist ties
US5339959 *Nov 25, 1992Aug 23, 1994Qci, Inc.Disposable medical waste bag
US5347865 *Nov 5, 1992Sep 20, 1994Amway CorporationMeasuring scoop with molded reusable fit clip
US5964252 *Dec 18, 1997Oct 12, 1999Morgan Adhesives CompanyAdhesive closure system with an abridged release liner
US5989683 *Sep 19, 1997Nov 23, 1999Bedford Industries, Inc.Wireless polymeric twist tie
US6536083 *Nov 11, 1999Mar 25, 2003Andrea DozziniClosing clip for tetrapak® and similar packages used for food distribution
US6622352Sep 4, 2001Sep 23, 2003Clip-N-StayQuick-release wire hanger
US6663809Jul 10, 2000Dec 16, 2003Bedford Industries, Inc.Preparing composition comprising thermoplastic copolyester, shaping to form twist tie by extruding ribbon, cooling ribbon in fluid medium to solidify
US7022058Feb 21, 2002Apr 4, 2006Tilia International, Inc.Method for preparing air channel-equipped film for use in vacuum package
US7087130Mar 4, 2004Aug 8, 2006Tilia International, Inc.Method for manufacturing a sealable bag having an integrated zipper for use in vacuum packaging
US7138025Mar 4, 2004Nov 21, 2006Tilia International, Inc.Method for manufacturing a sealable bag having an integrated tray for use in vacuum packaging
US7220053Dec 14, 2004May 22, 2007Sunbeam Products, Inc.Flexible composite bag for vacuum sealing
US7517484Mar 15, 2004Apr 14, 2009Sunbeam Products, Inc.Forming evacuation channels during single and multi-layer extrusion process
US7534039Jul 19, 2005May 19, 2009Sunbeam Products, Inc.Vacuum packaging films patterned with protruding cavernous structures
US7625459Jun 30, 2006Dec 1, 2009Sunbeam Products, Inc.Method for manufacturing liquid-trapping bag for use in vacuum packaging
US20100173047 *Dec 28, 2009Jul 8, 2010Da Silva Anderson MarinheiroFood package having wrapped stack of food products and method for packaging
Classifications
U.S. Classification383/70, 24/30.50R, 24/30.50S
International ClassificationB65D33/16
Cooperative ClassificationB65D33/1625
European ClassificationB65D33/16D1