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Publication numberUS3416199 A
Publication typeGrant
Publication dateDec 17, 1968
Filing dateJun 10, 1965
Priority dateJun 10, 1965
Publication numberUS 3416199 A, US 3416199A, US-A-3416199, US3416199 A, US3416199A
InventorsHarry H Imamura
Original AssigneeMinigrip Inc
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Seal for bags
US 3416199 A
Abstract  available in
Images(1)
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Claims  available in
Description  (OCR text may contain errors)

Dec. 17, 1968 H. H. IMAMURA 3,416,199

SEAL FOR BAGS Filed June 10, 1965- I NVEN TOR.

HARRY H. mm MURA United States Patent 3,416,199 SEAL FOR BAGS Harry H. Imamura, Seattle, Wash, assignor, by mesne assignments, to Minigrip, Inc., Orangeburg, N.Y., a corporation of New York Filed June 10, 1965, Ser. No. 462,918 2 Claims. (Cl. 24-201) ABSTRACT OF THE DISCLOSURE A seal for releasably closing an open end of a plastic bag. The seal includes elongated male and female elements formed along adjacent surfaces of the open end of the bag. The two elements may be pressed into engaging relation with one another along the lengths thereof to close the open end of the bag and then may be pulled apart to disengage the two elements to again open the end of the bag.

My invention is directed toward plastic seals for plastic bags.

It is an object of my invention to provide a new and improved plastic seal for plastic bags which is reusable and which can be made water-tight.

Another object is to provide a new and improved plastic seal of the character indicated which utilizes specially shaped elongated male and female elements cooperating with each other.

Still another object is to provide a new and improved plastic seal of the character indicated that can be quickly and easily sealed or opened.

All of the foregoing and still further objects and advantages of my invention will now be explained with reference both to this specification and to the drawings wherein:

FIG. 1 is a perspective view of one form of my invention with the seal in open position;

FIG. 2 is a cross sectional view thereof with the seal in closed position;

FIG. 3 is a perspective view of another form of my invention with the seal in open position;

FIG. 4 is a cross sectional view of the seal of FIG. 3 illustrating how the seal it improperly handled cannot be opened;

FIG. 5 is a cross sectional view of the seal of FIG. 3 illustrating how the seal if properly handled can be opened easily; and

FIG. 6 is a cross sectional view of the seal of FIG. 3 illustrating proper closure thereof.

Referring now to FIGS. -1 and 2, there is shown a plastic bag having a mouth with two opposite sides 10 and 12. The inner surface of side 10 carries a horizontal elongated female element 14 having upper and lower horizontally extending walls 16 and 18 lying in horizontal planes, the upper wall 16 having a downward turned lip 20, the lower wall 18 having an upwardly turned lip 22. Lip 20 has a rounded edge pointing downward and inward along an incline toward side 10; lip 22 has a sharp edge pointing upward and inward on an incline toward side 10. A horizontal slot is formed between walls 16 and 18. A thin elongated horizontally extending partition 26 lying in a horizontal plane is positioned within the slot and divides same into upper and lower horizontal sections 24 and 28.

The inner surface of side 12 carries a horizontally extending elongated male member 30 which in cross section carries upper and lower horizontal grooves 32 and 34 respectively engageable with and disengageable from corresponding lips 20 and 22. The curved tip 36 of member 30 carries a horizontal groove 38 engageable with and 3,416,199 Patented Dec. 17, 1968 disengageable from partition 26. The depth of groove 38 exceeds the extension of partition 26 whereby when the seal is closed, partition 26 fits into groove 38 but does not penetrate the entire depth thereof, lip 20 engages groove 32 and lip 22 engages groove 34, to form a water-tight seal. Upper slot section 24 carries a small horizontal subgroove 40 which permits wall 16 to be pivoted by manual action away from partition 26 to permit lip 20 to be moved out of groove 32 for opening the seal and separating the male and female elements. Walls 16 and 18 and partition 26 are integral with a horizontally extending base 42 in a vertical plane.

Referring now to FIGS. 3-6, one side 10 of a plastic bag on its inner surface is provided with a horizontal elongated female element 50 having an upper wall 52 extending horizontally in a downwardly inclined plane and terminating in a lip 54 having a downwardly extending rounded vertical edge and a spaced apart lower wall 58 extending horizontally in an upwardly inclined plane and terminating in a lip 60 having a pointed edge extending upward on an incline pointed toward side 10. Walls 52 and 58 are integral with a horizontally extending base 64 lying in a vertical plane whereby a horizontal slot 66 having in cross section the shape of a trapezoid is formed between walls 52 and 58. The base 64 carries on that surface which defines part of the slot a shallow horizontal sub-groove 40.

The opposite side 12 of the bag carries on its inner surface a horizontally extending male element 74 having in cross section'the general shape of an arrowhead having a rounded tip 76 and oppositely disposed upper and lower shoulders 68 and 70 respectively engageable with and disengageable from lips 54 and 60 and having shapes conforming to corresponding edges.

When the male element is sealed in the female element, the seal cannot be opened by exerting a horizontal pull on the male element as shown in FIG. 4, due to the locking action of shoulder 68 and lip 60 and its edge. The typical seated or closed position is shown in FIG. 6.

In order to open the seal easily, sub-groove 40 permits the upper wall 52 to be pivoted upward away from wall 58 to release the upper shoulder from lip 54, whereby shoulder 68 is unlocked from lip 60 and its edge and the male element can be readily separated from the female element as shown in FIG. 5.

While I have described my invention with particular reference to the drawings, my protection is to be limited only by the terms of the claims which follow.

Having thus described my invention, I claim as new and desire to secure by Letters Patent:

1. A seal for engaging and disengaging two sides of a ,plastic bag comprising:

a horizontally extending female element on one surface of one side and a horizontaly extending male element on an adjacent surface of the other side,

said female element having upper and lower horizontally extending walls with inturned lips formed at adj acent ends thereof and a vertical connecting wall forming a horizontal slot having an open side opposite said vertical wall,

means forming a uniformly-shaped horizontal partition having spaced parallel top and bottom walls and extending from said vertical wall into said slot to divide said slot into upper and lower slot sections,

means forming a subgroove in said vertical wall between said partition and said upper horizontally extending wall,

said male element having a tip portion insertable into said slot through the open side thereof,

means forming a horizontal groove in said tip portion shaped complementarily to said partition for receiving same when the top portion is inserted into said 3 4 slot, and means forming recesses in saidmale element 2,780,261 I 2/1957 Svec. for receiving the inturned lips formed on the female 3,038,225 6/1961 Ausnit. element when the two elements are arranged in en- 3,198,228 8/1965 Naito. gaged relation. I 2. The seal as defined in claim 1 wherein the partition 5 FOREIGN PATENTS is inserted into the horizontal groove a distance less than 706,084 3/ 1965 Canadah the depth of the groove to provide a space between the 1,106,141 12/1955 France" ends of the partition and the groove in the engaged posi- 1,041,436 10/1958 Y- tion of the male and female elements. 915,390 1/1953 Great 3W- 10 943,668 12/1963 Great Britaln.

References Cited UNITED STATES PATENTS 3,338,285 8/1967 Jaster. 150-3 BERNARD A. GELAK, Primary Examiner US. Cl. X.R.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2780261 *Oct 26, 1954Feb 5, 1957Flexigrip IncSliderless fastener closure
US3038225 *May 27, 1960Jun 12, 1962Ausnit StevenSeparable fastener
US3198228 *Oct 29, 1962Aug 3, 1965Seisan Nipponsha KkIntegral reclosable bag
US3338285 *Nov 23, 1964Aug 29, 1967Asf Gleitverschulss GmbhPackage or wrapper of plastic material
CA706084A *Mar 23, 1965FlexigripSeparable fastener
DE1041436B *Jun 22, 1953Oct 23, 1958Ernst SanderProfilleistenreissverschluss
FR1106141A * Title not available
GB915390A * Title not available
GB943668A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3945403 *Apr 19, 1973Mar 23, 1976Minigrip, Inc.Tube construction for fastener profile strips
US4212337 *Mar 31, 1978Jul 15, 1980Union Carbide CorporationClosure fastening device
US4578813 *Jun 11, 1984Mar 25, 1986Minigrip IncorporatedBag and reclosable separable fastener assembly providing both closing alignment facility and differential separation resistance
US4601694 *Apr 16, 1982Jul 22, 1986Minigrip, Inc.Thin wall reclosable bag material and method of making same
US4658433 *Sep 11, 1985Apr 14, 1987First Brands CorporationRib and groove closure bag with bead sealed sides
US4683015 *Jul 9, 1985Jul 28, 1987The Dow Chemical CompanyMethod of forming flexible fastener elements and securing them to a traveling web
US4710968 *Sep 11, 1985Dec 1, 1987First Brands CorporationTrident interlocking closure profile configuration
US4747702 *Mar 17, 1987May 31, 1988First Brands CorporationInterlocking closure device having controlled separation and improved ease of occlusion
US4795269 *Jun 30, 1983Jan 3, 1989First Brands CorporationControlled separation characteristics of interlocking closure fastening devices
US4854017 *Nov 17, 1987Aug 8, 1989First Brands CorporationMultiposition interlocking closure fastening device
US4872869 *Jun 24, 1988Oct 10, 1989Smith & Nephew (Latin America), Inc.Low profile ostomy device
US4907321 *Jan 31, 1989Mar 13, 1990First Brands CorporationEnhanced color change interlocking closure strip
US4917506 *Nov 21, 1988Apr 17, 1990First Brands CorporationInterlocking closure device having controlled separation and improved ease of occlusion
US4941238 *Feb 11, 1988Jul 17, 1990Allison E. AndersonSlide fasteners and the like
US5192135 *May 31, 1991Mar 9, 1993Dowbrands L.P.Profile and adjacent rib-type closure element for reclosable thermoplastic bags
US5211481 *Nov 30, 1992May 18, 1993Minigrip, Inc.Closure for sliderless zipper bags
US5363540 *Aug 7, 1992Nov 15, 1994Dowbrands L.P.Process and apparatus for controlling the gap width of a reclosable closure profile for a thermoplastic container
US5470518 *Feb 8, 1994Nov 28, 1995Dowbrands L.P.Process and apparatus for controlling the gap width of a reclosable closure profile for a thermoplastic container
US5478152 *May 20, 1994Dec 26, 1995Bogle; David M.Locking system for holding open a plastic film bag
US5520410 *Feb 1, 1995May 28, 1996Trw Vehicle Safety Systems Inc.Door locking mechanism for air bag module
US5558439 *Jun 8, 1995Sep 24, 1996Minigrip Inc.Wedge zipper
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US5794315 *Dec 28, 1995Aug 18, 1998Lin Pac, Inc.Non-reopening fastener for plastic packaging and method of forming same
US5797170 *Feb 28, 1997Aug 25, 1998Ykk CorporationSynthetic resin molded surface fastener
US6152600 *Nov 3, 1998Nov 28, 2000Reynolds Consumer Products, Inc.Particle-tolerating closure arrangement for reclosable bag and methods thereof
US6994535Jun 27, 2002Feb 7, 2006S.C. Johnson Home Storage, Inc.Method and apparatus for forming a guide rib on a section of plastic film
US7137736May 19, 2003Nov 21, 2006S.C. Johnson Home Storage, Inc.Closure device for a reclosable pouch
US7234865 *May 22, 2002Jun 26, 2007Illinois Tool Works Inc.Closure for a reclosable package
US7410298Apr 9, 2004Aug 12, 2008S.C. Johnson Home Storage, Inc.Closure device for a reclosable pouch
US7419300Jun 16, 2004Sep 2, 2008S.C. Johnson Home Storage, Inc.Pouch having fold-up handles
US7494333Jun 4, 2004Feb 24, 2009S.C. Johnson Home Storage, Inc.Apparatus for forming multiple closure elements
US7611283 *Sep 11, 2003Nov 3, 2009Cti Industries, Inc.Airtight zipper
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DE4020711A1 *Jun 29, 1990Jan 9, 1992Wolf SoellnerShroud for dead body - composed of biodegradable material
EP0147841A2 *Dec 22, 1984Jul 10, 1985Union Carbide CorporationInterlocking closure bag for use in high temperature environment
EP0208277A2 *Jul 4, 1986Jan 14, 1987Dow Consumer Products Inc.Flexible fastener elements and method of securing them to a traveling web
EP0218565A1 *Sep 10, 1986Apr 15, 1987Union Carbide CorporationTrident interlocking closure profile configuration
EP0297070A1 *Jun 20, 1988Dec 28, 1988First Brands CorporationEnhanced color change interlocking closure strip
EP1375369A1Jun 16, 2003Jan 2, 2004Illinois Tool Works Inc.Closure for a package
WO1987002968A1 *Oct 30, 1986May 21, 1987Kcl CorpReclosable flexible container
Classifications
U.S. Classification24/585.12, 24/DIG.500, 383/63
International ClassificationB65D33/25, A44B19/16
Cooperative ClassificationA44B19/16, Y10S24/50, B65D33/2541
European ClassificationB65D33/25A3