|Publication number||US3780781 A|
|Publication date||25 Dec 1973|
|Filing date||7 Sep 1971|
|Priority date||7 Sep 1971|
|Publication number||US 3780781 A, US 3780781A, US-A-3780781, US3780781 A, US3780781A|
|Original Assignee||Seisan Nipponsha Kk|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (3), Referenced by (166), Classifications (13), Legal Events (5)|
|External Links: USPTO, USPTO Assignment, Espacenet|
United States Patent Uramoto Dec. 25 1973  OPENABLE BAG 3,473,589 10/1969 Gotz 150/3 0  In entor: Tasuro Uramoto c/O Seisan 3,652,006 3/1972 Trewella .i 229/66 X Nippon Sha, Ltd. New Kohjimachi Building, 3, S-chome, Kohjimachi, Primary Examiner-Donald F. Norton Chiyoda-ku, Japan Att0rneyCarltOn Hill et al.
22 Filed: Sept. 7, 1971  Appl. No.: 178,088 57 ABSTRACT 63 'f i Apphcanon Data A plastic film structure for forming a bag including a 1 commuanon'm'pan M 882,491 sheet of thin plastic film with continuous shaped inter- 1969 abandoned locking rib and groove profiles thereon either integral with the film or on strips which are fused to the film 2% 8 3%? with the sheet having plastic reinforcing strips thereon 5 d 24 201/0 between the profiles with the reinforcing strips provid- 1 le 0 earc l ing tear guidelines for tearing off the top of a bag formed from the sheet to thereafter provide ri in 8 PP g References Cited flanges for separating the profiles and opening the bag. UNITED STATES PATENTS 3,198,228 8/1965 12 Claims, 14 Drawing Figures Naito 150/3 PAIENIEHHECZS ms 3.780.781
Ta /aura (/hamo/o OPENABLE BAG REFERENCE TO RELATED APPLICATIONS The present application is a continuation-in-part of my copending application Ser. No. 882,491 filed Dec. 5, 1969 and now abandoned.
BACKGROUND OF THE INVENTION The present invention relates to improvements in plastic film sheet structures for forming bags and the bags formed therefrom, particularly to a structure which permits the bag to be more readily opened.
More specifically, the invention relates to bags of the reopenable type which have shaped rib and groove profiles extending along the top that are openable by pulling apart top flanges above the profiles and are reclosable by pressing the rib and groove elements together. This type of bag is very useful for products which are removed from the bags only a portion at a time, or where the bags are to be reused. However, in many instances it is desirable to provide a bag which is sealed in the store and cannot be opened until eventually purchased. The advantages of this type of bag are obvious for foodstuffs and like materials wherein the potential customers must not be able to open the bag to remove a portion of the contents or contaminate the interior.
It is accordingly an object of the present invention to provide an improved sheet structure for forming a bag of the reclosable type wherein the bag has a structure which is completely sealed until used.
In the sealed reopenable type of bag, it is conventional to tear open the top of the bag above the reclosable rib and groove elements in such a manner as to provide flanges with which to separate the elements. This may be done by having the side walls of the bag either continuous or sealed at the top so that the top can be either cut or torn above the rib and groove elements along a line of weakened resistance or perforation before it is to be opened. The flanges which remain at the top of the bag after it is torn or cut enable the user to pull the rib and groove elements apart for access to the bag interior.
It is an object of the invention to provide a reclosable bag of the sealed type with an improved tearing strip arrangement at the top which permits the bag to be made of very thin lightweight material or a laminated material. A feature of the present invention is to provide a bag structure wherein a tear line, where the film is too thin to be scored or perforated is required, or where because the film is of laminated construction and has sub-stantially greater strength, additional tearability or tear guidance is required, or wherein the functions of the interlocking rib and groove elements are not encumbered because of the thinness of the material, so that the provision of an easy to remove, yet strong tear strip at the top of the bag is permitted.
Various modifications, forms and arrangements of the invention are intended to be embodied and will become apparent to those skilled in the art from the teaching of the principles of the invention in connection with the disclosure of the claims, specification and drawings, in which: I
IN THE DRAWINGS FIG. 1 is a plan view of a plastic film sheet structure for forming a bag in accordance with the principles of the present invention;
FIG. 2 is an elevational view ofa bag formed from the sheet structureof FIG. 1;
FIG. 3 is a vertical sectional view taken substantially along the line IIIIII of FIG. 2;
FIG. 4 is a fragmentary view shown in perspective illustrating a tear strip being removed from the top of a bag;
FIGS. 5 thru 10 are vertical sectional views similar to FIG. 3 illustrating different arrangements embodying the concepts of the invention;
FIG. 11 is a fragmentary sectional view taken substantially along line XIXI of FIG. 10; and
FIGS 12 thru 14 are vertical sectional views illustrating additional arrangements embodying the concepts of the invention.
DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a thin plastic film sheet of polyethylene or similar plastic material of the type used in thin bags. The sheet has side edges 12c and 12a which will later form the bottom of a bag 19 as shown in FIG. 2. The sheet has front and rear edges 12a and 12b which will later form the side edges of the bag 19 of FIG. 2. The sheet is preformed such as by a plastic extrusion process, and will usually be formed in a continuous running strip and cut into sections as shown in FIG. 1. When formed into a bag, the sheet is doubled or folded down its center 126 to form the top of the bag as shown in FIGS. 2 and 4. When doubled, seams will be formed to join the doubled edges 12a and 12b to provide side seams for the bag. When a series of bags are made from a continuous running sheet, the seaming and cutting can be formed in a simultaneous operation such as by a hot wire cutter and seamer as will be recognized by those versed in the art.
Fused to the upper surface of the sheet (which will form the interior of the bag after the sheet is folded and side sealed) are a pair of plastic reinforcing strips 13 and 14. These reinforcing strips carry the interlocking rib and groove elements with the rib element shown at and the groove element at 14a. These elements are complementary shaped so as to interlock when pressed together and to separate when forcibly pulled apart. It should benoted that said reinforcing strips can initiall be formed as one piece.
The reinforcing strips 13 and 14 also function to define a tear line for removing a strip from the top of the bag in the manner shown in FIG. 4. The tear line is formed by lines 13b and 14b of weakened resistance so that when the top of the bag 19 is gripped and pulled to the side or upwardly, as shown in FIG. 4, the strip 17a will be torn from the bag in a relatively straight line along the tear lines 13b and 14b. This will leave flanges 17 and 18 which can be gripped and pulled apart to forcibly separate the rib and groove elements 13a and 14a. The remaining part of the reinforcing strips also strengthen and stiffen the film flanges above the profile. If too thin a film is being used from which to make the bags, the opening flanges above the profile would bend at the point the profile stem joins the film and would not separate the profile.
In summary with respect to the sheet structure of FIG. l,'when it is to be formed into the bag 19 of FIG. 2, it is doubled down its center l2e to form a fold for the top of the bag, and the sides 12a and 12b are seamed with the bottom edges 12c and 12d remaining unattached to leave a bottom opening'for filling'the bag. The rib and groove elements 13a and 14a are pressed together to interlock so that the contents of the bag will not flow past these interlocked elements.
When the contents are placed in the bag, a seam is formed along the bottom to join edges 12c and 12d to form a seam 16 as shown in FIG. 3. The bag is then completed for shipping and storage. It is completely hermetically sealed preventing moisture and foreign elements from coming into contact with the contents or coming into the top to contact the rib and groove elements. When the bag is to be used, the user grips the top to tear the strip 17 therefrom in the manner shown in FIG. 4. The weakened tear lines 1317 and 14b insure that a strip of uniform width will be torn from the top leaving flanges l7 and 18 intact. This prevents the tear from turning downwardly to tear into the profiles or the bag the light weight of the bag material does not hamper the function of the interlocking elements or does not hamper the capability of removing a tear strip for access to the interlocking rib and groove elements.
In some instances it may be desired to provide a flat reinforcing tear strip separate from the strips which support the rib and groove elements, as shown in the structures of FIGS. 5 thru 9.
In FIG. 5 a bag body 20 is formed of plastic film and has fused to the inner surface, profile strips 21 and 22 carrying shaped complementary interlocking rib and groove profiles. Also fused to the inner surface of the sheet material of the bag are reinforcing strips 23 and 24 which have tear lines of weakened resistance 23a and 24a extending down their center. Thus, when the bag is opened, the top can be torn and the bag will readily separate along lines 23a and 24a. If the plastic film is relatively light in weight, this will enhance the,
removal of the top strip.
It may be desired to form the profile strips 21 and 22, and the reinforcing tear strips 23 and 24 of different materials. The profile strips 21 and 22 will be of a stiff plastic having characteristics necessary for optimum performance of the interlocking rib and groove profiles. the reinforcing strips 23 and 24 will be ofa tough material which resists lateral tearing and encourages the tearing of the strips down through the center tearlines 230 and 24a. The plastic of the reinforcing tear strips may be only sufficiently thick to guide the tear for obtaining economy in production. A plastic which has an oriented grain so that it tears more easily in a longitudinal direction is particularly well suited for this function.
When the tear strip is removed from the bag, in the manner shown in FIG. 4, the lower portions of the reinforcing strip which remain, i.e., in FIG. 5 the portions below the lines 23a and 24a, provide reinforced gripping flanges. These remaining portions of the strips reinforce the lips to aid the user in pulling apart the interlocking rib and groove elements.
In another form, as shown in FIG. 7, the reinforcing film strips 28 and 29 are constructed so that the bag must tear between the strips 28 and 29 and the profile strips 26 and 27. The strips are fused to the inside wall of the bag 25, and when the top is torn from the bag, the tear will follow along the lines 25a and 25b of the bag material itself.
In most instances it will be apparent to the user where to grip the bag for tearing the strip from the top, but index markings or color lines may be added to the plastic material to illustrate where the tear is to be begun. Also, the strips such as 28 and 29 may be colored so as to show up through the transparent bag to indicate to the user where to grip. In addition an end notch may be provided such as shown at 52 in FIG. 11 as will be later described herein.
In the form illustrated in FIG. 8, reinforcing ribs are provided in the reinforcing tear strip so as to guide the tear along said ribs. In the bag 36 of FIG. 8, profile strips 37 and 38 are fused to the inner surface. Reinforcing tear strips 39 and 40 are also fused to the inner surface of the bag, above the profile strips. These reinforcing strips 39 and 40 each have parallel ribs extending along the surface such as shown at 390 and 39b for the strip 39, and at 40a and 40b for the strip 40. The ribs are positioned so as to be in alignment or immediately adjacent with each other in the collapsed bag so that when the user grips the top of the bag, the strips 39 and 40 will tear down the center between the ribs. The ribs will prevent the line of tear from deviating sideways.
In the arrangement of FIG. 6, separate parallel reinforcing strips are provided to compel the line of tear to travel between the strips. In the bag 30, profile strips 31 and 32 are attached to the inner surface. Above the profile strips of one side wall of the bag are the reinforcing tear strips 33 and 34 and on the other side, opposite them, are reinforcing tear strips 35 and 36. These strips are in alignment so that the tear lines 300 and 30b are opposite each other. When a user grips the top of the bag, the top portion including the strips 33 and 35 will be removed from the bag top.
In the structure of FIG. 9, the reinforcing tear strip 44 is formed as a single strip. In this bag 41, rib and groove profile strips 42 and 43 are fused to the inner surface of the bag wall. The reinforcing tear strip 44 is fused to the film above the profile strips and has tear lines 45 and 46 of weakened tear resistance positioned to be opposite each other so that the top portion of the bag will be smoothly removed when it is gripped and torn.
FIG. 10 illustrates an arrangement wherein the profiles 48 and 49 are formed integral with the wall of a bag 47. Tear strips 50 and 51 are fused to the inner surface of the bag above the profiles and have tear lines 50a and 51b. It will be understood that with each of the arrangements shown in FIGS. 7 thru 9, the profiles may be integral with the bag wall rather than being carried on strips attached to the bag wall. The provision of strips carrying the profiles permits the bag wall to be of thinner material.
In the arrangement of FIG. 10, an end notch 52 may be provided as shown in FIG. 11. This end notch provides a starting point to help insure that the tear will begin at the correct location. It will be understood that the starting notch 52 may be utilized with each of the structures shown in the drawings. The notch is preferably formed by providing a small indentation or cut in the plastic material and then sealing around the edges of the cut to reatin the moisture and dust-proof. integrity of the bag, or by making a broad fin then cutting a notch into it.
In FIG. 12 a bag 55 has profile strips 56 and 57 fused to the inner surface thereof. These profile strips have mating interlocking rib and groove elements similar to the strips earlier described herein. Above the profile strips are positioned reinforcing strips 58 and 59, which are fused to the material of the bag 55. The reinforcing strip 58 has a tear line 58a extending therealong, and the strip 59 has a tear line 59a which is positioned to coincide with the tear line 58a. Thus, when the top is torn off the bag, the two tear lines 58a and 59a, being opposite each other, will permit removal of a strip to release the flanges for separating the rib and groove elements. To aid in guiding the tearing of the bag along the tear lines, guiding ribs are positioned above and below the tear lines. The strip 58a has ribs 58b and 58c. The strip 59 has ribs 59b and 590. These ribs confine the direction of tear to a straight line along the top, i.e., along the tear lines 58a and 59a.
In the arrangement of FIG. 13, a one-piece strip 61 is positioned within a bag 60. This strip 61 carries the interlocking profiles 61a and 61b as well as the tear lines 61c and 61f. The tear lines are opposite each other for permitting tearing off a strip from the top of the bag. To guide the tear of the material along the tear lines, ribs are positioned above and below the tear lines. Ribs 61d and 61e are positioned on each side of the tear line 610, and ribs 61g and 61h are positioned on each sideof the tear line 61f. When the topstrip is torn off, the ribs 61c and 61h will remain with the bag and provide additional gripping surfaces for grasping the flanges and pulling them apart to separate the rib and groove elements 61a and 61b.
In FIG. 14 a bag 70 is formed of plural layers 70a and 70b of material. 70a, for example, may be thermoplastic bonded to an outer layer 70b of paper or foil and various numbers and types of layers may be employed which provide the physical properties required by a bag for a particular use. Bonded to the inner layer of the bag are rib and groove profile strips 73 and 74. Above the profile strips are reinforcing strips 71 and 72 which are bonded to the inner layer of the bag and have tear guide ribs, or other tear guide means thereon.
The bag 70 is shown closed at the top with a seam 700. It will be understood that various forms of profile strips and reinforcing strips shown and described with the other figures may be employed with a multilayer bag, such as shown in FIG. 14, and the bags may be seamed at the top for certain purposes, rather than being continuous at the top. With the arrangement of FIG. 14, the separate layers of the bag may each be of a material optimumly suited to perform the function of giving the bag wall stiffness, impermeability, transparency or opacity, or whatever physical property that is required, and yet, the profile strips may be formed of a plastic of optimum physical properties for the interlocking rib and groove elements. Further, the reinforcing strips may also be formed of a plastic or other material which has optimum properties for functioning as a tear guide, stiffener and flange strengthening means. Thus, by making the bag of multiple components, a substantial saving can be effected while actually enhancing the properties of the bag and its parts.
The profile strips and the tear strips of the various embodiments are fused to the sheet material by a suitable fusing process. The continuous sheet material and type seal and strips will conventionally be provided from rolls with the strips being fused to the preprepared sheet material. The strips may be fused immediately after they are extruded, as described in the above copending applications, or may be preformed and fused by the application of heat and pressure at a later time. The sheet with the strips fused thereto then may be wound upon a roll or in some instances, it may be desirable to form the bag immediately by doubling over the sheet and forming the bag as illustrated in FIG. 2.
While a bag is shown that has the top formed of continuous film doubled over, in some instances separate sheets may be formed with a seam formed at the very top of the bag above the reinforcing tear strips. It will be understood that in the claims wherein reference is made to a plastic film structure for forming a bag, the intent is to cover the film structure in its condition in a sheet as shown in FIG. 1 before being formed into a bag as well as after the film structure is embodied in a bag in the condition shown in FIGS. 2 and 3, for example. v
The bag material will preferably be transparent, though not necessarily when made from barrier films, and in some instances, the tear strips may be colored so that the user can readily see where the tear is to be made. In the arrangement of FIG. 8, for example, the material of the bag 36 may be transparent and the strips 39 and 40 may also be transparent with the ribs 390 and 39b and the ribs 40a and 4012 being colored, or in FIG. 6 the strips 33 and 35 could be colored.
In the arrangement of FIG. 8, while the strips 39 and 40 may be uniformly fused to the film, and the center portions of the strips 39 and 40 between the ribs may be sealed by a cross-weave pattern.
While the reinforcing tear strips are shown in the drawings as fused to the inner surface of the film sheet material of the bag, in some instances it may be desired to laminate them to the outer surface.
I claim as my invention:
1. A bag structure comprising,
a bag body formed of a thin plastic film,
said film being continuous at the bag top,
facing mating interlocking profiles extending within the bag spaced downwardly from the top edge of the bag,
a flat reinforcing strip means of plastic fused to the bag film along the top between the top edge and said profiles defining a top tear line spaced above said profiles.
2. A bag in accordance with claim 1 wherein said bag body has an opening at the bottom for filling and sealing the bag.
3. A bag in accordance with claim 1 wherein said profiles are carried by strips fused to the inner surface of the film of the bag body.
4. A bag structure constructed in accordance with claim 1 wherein the bag body has a seal along the top above said reinforcing strip means.
5. A bag structure comprising,
a bag body formed of a flexible plastic film and having side walls, interlocking rib and groove elements on the inner surfaces of the side walls adjacent the top of the bag,
flanges projecting above the rib and groove elements for gripping the bag and drawing the elements apart, and
strips fused to the surfaces of the flanges above the elements for stiffening the flanges and providing improved gripping thereof. 6. A reclosable bag comprising, a plastic film bag body being continuous at the top and closed by seals at the sides and bottom, and
fastener strips fused'to the inner surface of the bag adjacent the top with said strips having interlocking profiles on the inner face and a flat surface on the outer face with the flat surface being joined to the film, with said strip containing means for tearing open the top of the bag above the profiles along a line of weakened tear resistance.
7. A reclosable bag structure comprising in combination, a bag body including opposing bag walls of a flexible material, opposed separate plastic fastener strips on the inner walls of the bag adjacent the bag top having mating pressure interlocking separable rib and groove elements projecting toward each other and having a base with a flat surface extending above and below the profiles with said base being joined to the inner surface of the bag wall, and the upper ends of the bag walls being joined to each other at the top of the bag to protect the bag contents above the fastener strips.
8. A reclosable bag structure constructed in accordance with claim 7 wherein said bag walls have an inner surface of plastic and are joined to the flat plastic base of the fastener strips by being fused thereto above and below said rib and groove elements.
9. A reclosable bag structure constructed in accordance with claim 7 wherein the side edges of the bag are joined by cross seals and the lower edges are joined by a bottom seal so that the bag provides a complete barrier protecting the bag contents from both above and below said fastener strips.
10. A reclosable bag structure constructed in accordance with claim 7 wherein the upper ends of the walls are joined by being continuous and integral with the material of the two walls folded at the extreme top of the bag.
11. A reclosable bag structure constructed in accordance with claim 7 wherein the opposing bag walls are of one piece and continuous at the top of the bag.
12. A reclosable bag structure constructed in accordance with claim 7 wherein the bag walls are joined at the bottom edge of the bag and are of one piece.
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US3198228 *||29 Oct 1962||3 Aug 1965||Seisan Nipponsha Kk||Integral reclosable bag|
|US3473589 *||9 Dec 1966||21 Oct 1969||Minigrip Inc||Plastic bag|
|US3652006 *||20 Jan 1970||28 Mar 1972||Wyomissing Corp||Tear open package and tear seam therefor|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US4191230 *||27 Apr 1978||4 Mar 1980||Minigrip, Inc.||Integral extruded construction for bags|
|US4246288 *||9 Aug 1979||20 Jan 1981||W. R. Grace & Co.||Reclosable package|
|US4249982 *||10 Dec 1979||10 Feb 1981||Minigrip, Inc.||Apparatus for making reclosable bags|
|US4335817 *||6 Feb 1980||22 Jun 1982||Talon, Inc.||Easy openable and closable bag with slide fastener|
|US4362198 *||26 Mar 1980||7 Dec 1982||Union Carbide Corporation||Closure device|
|US4363345 *||18 Nov 1981||14 Dec 1982||Union Carbide Corporation||Reclosable container|
|US4479244 *||30 Sep 1982||23 Oct 1984||Steven Ausnit||Easy opening bag|
|US4528224 *||10 Sep 1982||9 Jul 1985||Minigrip, Inc.||Method of making multiple reclosable bag material|
|US4561109 *||22 Jun 1984||24 Dec 1985||Mobil Oil Corporation||Plastic bags with releasable closure which resists opening from inside|
|US4589145 *||31 Oct 1983||13 May 1986||Signode Corporation||Packaging material and package|
|US4663915 *||3 Mar 1986||12 May 1987||Signode Corporation||Method of packaging and apparatus|
|US4683015 *||9 Jul 1985||28 Jul 1987||The Dow Chemical Company||Method of forming flexible fastener elements and securing them to a traveling web|
|US4709533 *||22 Dec 1986||1 Dec 1987||Minigrip, Inc.||Method and apparatus for making reclosable bags in a form, fill and seal machine|
|US4736450 *||20 Nov 1985||5 Apr 1988||Minigrip, Inc.||Gusseted bags with reclosure features|
|US4764977 *||19 Feb 1987||16 Aug 1988||The Dow Chemical Company||Reclosable plastic container|
|US4786190 *||10 Mar 1988||22 Nov 1988||Minigrip, Inc.||Reclosable package having outer reclosable closure and inner non-reclosable closure|
|US4840611 *||31 Dec 1987||20 Jun 1989||Minigrip, Inc.||Gusseted bags with reclosure features|
|US4846585 *||29 Jan 1988||11 Jul 1989||Minigrip, Inc.||Easy open bag structure|
|US4874257 *||25 Jan 1988||17 Oct 1989||Nihon Tokkyo Kanri Company Limited||Method of forming a closed filled bag, a bag construction and an apparatus for forming the bag|
|US4923309 *||27 Feb 1989||8 May 1990||Illinois Tool Works||Tamper-evident package|
|US4927271 *||12 Dec 1988||22 May 1990||Kcl Corporation||Recloseable tamper evident bag with hooded closure|
|US4969309 *||27 Jan 1989||13 Nov 1990||Kramer & Grebe Canada, Ltd.||Method and apparatus for producing resealable packages|
|US4969310 *||12 May 1989||13 Nov 1990||Automated Packaging Systems, Inc.||Packaging machine and method|
|US4986673 *||28 Dec 1989||22 Jan 1991||Kapak Corporation||Resealable bag arrangement and method|
|US5002781 *||7 Sep 1990||26 Mar 1991||Zip-Pak Incorporated||Bacon/meat package|
|US5022530 *||13 Oct 1989||11 Jun 1991||The Dow Chemical Company||Modified zipper elements for easy open containers|
|US5026563 *||23 Mar 1989||25 Jun 1991||Zip-Pak Incorporated||Zippered closure for thermoformed package|
|US5033868 *||13 Oct 1989||23 Jul 1991||Paramount Packaging Corporation||Flexible plastic bag with perforated handle|
|US5036643 *||9 May 1990||6 Aug 1991||Package Machinery Company, Bodolay/Pratt Division||Form, fill, seal and separate packaging machine for reclosable containers including means for applying zipper to web|
|US5046300 *||19 Oct 1990||10 Sep 1991||Reynolds Consumer Products, Inc.||Method and apparatus for forming a reclosable package|
|US5063069 *||27 Apr 1990||5 Nov 1991||Zip-Pak Incorporated||Zippered closure for thermoformed package|
|US5064664 *||4 Apr 1990||12 Nov 1991||Oscar Mayer Foods Corporation||Package having engraved lettering peel seal tamper-evidence message|
|US5088164 *||22 Mar 1989||18 Feb 1992||Minnesota Mining And Manufacturing Company||Container with intermeshable closure members|
|US5092684 *||4 Mar 1991||3 Mar 1992||Illinois Tool Works Inc.||Post-applied zipper base with grip strip|
|US5100246 *||9 Oct 1990||31 Mar 1992||Illinois Tool Works Inc.||Pull bead and guide rails for easy open flexible containers|
|US5103546 *||9 Nov 1990||14 Apr 1992||Minnesota Mining And Manufacturing Company||Process for preparing a strip of flexible closure material to be applied to a receptacle|
|US5103979 *||11 Oct 1989||14 Apr 1992||Oscar Mayer Foods Corp.||Package having peel seal tamper-evidence message|
|US5113555 *||26 Nov 1990||19 May 1992||Minnesota Mining And Manufacturing Company||Container with intermeshable closure members|
|US5118203 *||19 Apr 1991||2 Jun 1992||T W Kutter, Inc.||Resealable packages and method and apparatus for producing same|
|US5121997 *||3 May 1991||16 Jun 1992||Illinois Tool Words Inc.||Perforated tear strip for easy-open flexible containers|
|US5127208 *||6 Aug 1991||7 Jul 1992||Reynolds Consumer Products Inc.||Method and apparatus for forming a reclosable package|
|US5157811 *||10 Dec 1990||27 Oct 1992||Package Machinery Company Bodolay/Pratt Division||Reclosable strip fastener with self opener|
|US5186543 *||19 May 1992||16 Feb 1993||Illinois Tool Works Inc.||Tear-open bag having guide strips|
|US5215380 *||18 Sep 1992||1 Jun 1993||Reynolds Consumer Products, Inc.||Reclosable package with tear strip|
|US5224779 *||20 Mar 1992||6 Jul 1993||Oscar Mayer Foods Corporation||Tamper-evident, reclosable flexible packages|
|US5238306 *||19 May 1989||24 Aug 1993||Reynolds Consumer Products, Inc.||Method of producing a sealing system for a reclosable webbed-wall package, and system made|
|US5259904 *||8 May 1992||9 Nov 1993||Minigrip, Inc.||Oscillating grip strip for recloseable plastic bags and method and apparatus for making the same|
|US5456928 *||10 May 1991||10 Oct 1995||Oscar Mayer Foods Corporation||Tamper-evident, flexible, reclosable package|
|US5525363 *||12 Sep 1994||11 Jun 1996||Kraft Foods, Inc.||Cheese pouch having easy opening and reclosing characteristics|
|US5552202 *||11 Jul 1995||3 Sep 1996||Reynolds Consumer Products Inc.||Tear guide arrangement|
|US5609420 *||3 Jul 1996||11 Mar 1997||Minigrip, Inc.||Reclosable bag closure with tear containing strips|
|US5613934 *||4 Apr 1996||25 Mar 1997||Reynolds Consumer Products Inc.||Method of forming a tear guide arrangement|
|US5660479 *||16 Feb 1996||26 Aug 1997||Reynolds Consumer Products Inc.||Easy open package header|
|US5664303 *||6 Nov 1995||9 Sep 1997||Illinois Tool Works Inc.||Differential flange header package|
|US5669715 *||16 Aug 1996||23 Sep 1997||Tenneco Packaging||Tamper-evident reclosable plastic bag with slider|
|US5672009 *||21 May 1996||30 Sep 1997||Illinois Tool Works Inc.||Reclosable pouch and zipper therefor|
|US5713669 *||5 Dec 1996||3 Feb 1998||Tenneco Packaging||Plastic bag with zipper slider captured in pocket|
|US5769772 *||13 Aug 1996||23 Jun 1998||Tenneco Packaging Inc.||Packages made with both high-frequency/radio-frequency seals and conventional heat/pressure seals using combinations of polar and non-polar polymers|
|US5775812 *||20 Nov 1996||7 Jul 1998||Tenneco Packaging||Tamper-evident reclosable plastic bag with breakaway slider|
|US5911508 *||10 Nov 1997||15 Jun 1999||Dobreski; David V.||Vented reclosable bag|
|US5924795 *||2 Jul 1993||20 Jul 1999||Kraft Foods, Inc.||Tamper-evident, reclosable, flexible packages|
|US5927855 *||30 Jun 1998||27 Jul 1999||Reynolds Consumer Products, Inc.||Tamper-evident closure arrangements and methods|
|US5964532 *||15 Oct 1997||12 Oct 1999||Tenneco Packaging Inc.||Reclosable fastener strip with tamper evident feature|
|US6004032 *||30 Jun 1998||21 Dec 1999||Reynolds Consumer Products, Inc.||Tamper-evident closure arrangements and methods|
|US6010244 *||21 Apr 1999||4 Jan 2000||Tenneco Packaging Inc.||Vented reclosable bag|
|US6030122 *||6 Mar 1998||29 Feb 2000||Illinois Tool Works Inc.||Pinch-grip zipper|
|US6071011 *||12 Aug 1999||6 Jun 2000||Tenneco Packaging, Inc.||Fill-through-the-top package|
|US6110586 *||27 Aug 1998||29 Aug 2000||Illinois Tool Works Inc.||Fastener tape fabrication equipment and process|
|US6148588 *||17 Dec 1999||21 Nov 2000||Pactiv Corporation||Fill-through-the-top package and method and apparatus for making the same|
|US6149302 *||13 Sep 1999||21 Nov 2000||Taheri; Nossi||Plastic bag with tamper-evident closure|
|US6152601 *||13 Aug 1998||28 Nov 2000||Illinois Tool Works Inc.||Fastener tape material, bag utilizing fastener tape material, and method of manufacture thereof|
|US6217216||21 Oct 1999||17 Apr 2001||Nossi Taheri||Reclosable plastic bag with non-perforated tear zone|
|US6257763||4 Jun 1998||10 Jul 2001||Huntsman Kcl Corporation||Tamper evident zipper slider|
|US6279298||21 Oct 1999||28 Aug 2001||Pactiv Corporation||Fill-through-the-top package and method and apparatus for making the same|
|US6286999||11 May 1999||11 Sep 2001||Pactiv Corporation||Tamper-evident reclosable bag|
|US6318894||6 Oct 2000||20 Nov 2001||Kraft Foods Holdings, Inc.||Resealable flexible packages having hook design tear line|
|US6360513||1 Nov 1999||26 Mar 2002||Sargento Foods Inc.||Resealable bag for filling with food product(s) and method|
|US6419391||17 May 2001||16 Jul 2002||Pactiv Corporation||Reclosable bags having a tamper evident stepped member|
|US6431358 *||2 Aug 2000||13 Aug 2002||Fuji Photo Film Co., Ltd.||Recording sheet package and sheet supply cassette for printer|
|US6439770||17 May 2001||27 Aug 2002||Pactiv Corporation||Reclosable bags having a tamper-evident retaining member extending through a slider|
|US6460238||24 Jul 2001||8 Oct 2002||Pactiv Corporation||Plastic bag slider and end termination installation assembly and method|
|US6499878||21 Dec 1999||31 Dec 2002||Pactiv Corporation||Reclosable packages with barrier properties|
|US6575625||27 Jul 2001||10 Jun 2003||Pactiv Corporation||Reclosable bags having a removable member encapsulating a slider|
|US6588177||4 Feb 2002||8 Jul 2003||Reynolds Consumer Products, Inc.||Method and apparatus for forming a reclosable package|
|US6611996||2 Jul 2001||2 Sep 2003||Pactiv Corporation||Slider for reclosable fastener|
|US6659643 *||4 Feb 2002||9 Dec 2003||Illinois Tool Works Inc.||Barrier arrangements for plastic bags|
|US6663283||18 May 2001||16 Dec 2003||Pactiv Corporation||Reclosable bags having a tamper-evident member extending over a zipper proximate to a slider|
|US6712509||21 Mar 2002||30 Mar 2004||Pactiv Corporation||Reclosable bag having tamper-evident member attached to body panels along a line of weakness located below the rib and groove profiles of the bag zipper|
|US6713152||7 Sep 2001||30 Mar 2004||Pactiv Corporation||Fins and profiles for plastic bags|
|US6910806||20 Nov 2002||28 Jun 2005||Sargento Foods, Inc.||Resealable bag for filling with food product(S) and method|
|US6913387||20 Nov 2002||5 Jul 2005||Sargento Foods, Inc.||Resealable bag for filling with food product (s) and method|
|US6954970||11 Mar 2002||18 Oct 2005||Illinois Tool Works Inc.||Insertion apparatus for attaching sliders onto zipper bags and film|
|US6979289||9 Sep 2003||27 Dec 2005||Illinois Tool Works Inc.||Insertion apparatus for attaching sliders onto zipper bags and film|
|US6988828 *||16 Apr 2003||24 Jan 2006||Ron Linneweil||Closure for containers and reclosable containers including the same|
|US6991375 *||4 Feb 2003||31 Jan 2006||Velcro Industries B.V.||Reclosable packaging|
|US7008106||7 Nov 2002||7 Mar 2006||Pactiv Corporation||Reclosable bag having tamper-evident member removable from the bag along a line of weakness located below the bag zipper|
|US7040808||9 Jun 2003||9 May 2006||Pactiv Corporation||Reclosable bags with tamper evident features and methods of making the same|
|US7137736||19 May 2003||21 Nov 2006||S.C. Johnson Home Storage, Inc.||Closure device for a reclosable pouch|
|US7159282||25 Feb 2003||9 Jan 2007||Pactiv Corporation||Reclosable fasteners or zippers for use with polymeric bags|
|US7165887||20 Nov 2002||23 Jan 2007||Sargento Foods, Inc.||Resealable bag for filling with food product(s) and method|
|US7254873||26 Aug 2002||14 Aug 2007||Illinois Tool Works, Inc.||Scored tamper evident fastener tape|
|US7261468 *||27 Jun 2005||28 Aug 2007||Illinois Tool Works Inc.||Easy open feature for reclosable bags having a longitudinal fin seal|
|US7308783||12 Jul 2005||18 Dec 2007||Velcro Industries B.V.||Filling and using reclosable bags|
|US7316641||15 Mar 2006||8 Jan 2008||Pactiv Corporation||Reclosable bags with tamper evident features and methods of making the same|
|US7320545||20 Nov 2002||22 Jan 2008||Sargento Foods Inc.||Resealable bag for filling with food product (s) and method|
|US7322920 *||16 Jan 2004||29 Jan 2008||Illinois Tool Works Inc.||Easy-open shrouded slider-zipper assembly for reclosable bag|
|US7377015||22 Dec 2006||27 May 2008||Pactiv Corporation||Reclosable fasteners or zippers for use with polymeric bags|
|US7406810||24 Oct 2005||5 Aug 2008||Velcro Industries B.V.||Reclosable packaging|
|US7410298||9 Apr 2004||12 Aug 2008||S.C. Johnson Home Storage, Inc.||Closure device for a reclosable pouch|
|US7419300||16 Jun 2004||2 Sep 2008||S.C. Johnson Home Storage, Inc.||Pouch having fold-up handles|
|US7424796||29 Oct 2007||16 Sep 2008||Velcro Industries B.V.||Filling and using reclosable bags|
|US7494333||4 Jun 2004||24 Feb 2009||S.C. Johnson Home Storage, Inc.||Apparatus for forming multiple closure elements|
|US7665192||24 Mar 2008||23 Feb 2010||Pactiv Corporation||Reclosable fasteners or zippers for use with polymeric bags|
|US7784160||15 Jun 2007||31 Aug 2010||S.C. Johnson & Son, Inc.||Pouch and airtight resealable closure mechanism therefor|
|US7850368||4 Jun 2004||14 Dec 2010||S.C. Johnson & Son, Inc.||Closure device for a reclosable pouch|
|US7857515||15 Jun 2007||28 Dec 2010||S.C. Johnson Home Storage, Inc.||Airtight closure mechanism for a reclosable pouch|
|US7874731||15 Jun 2007||25 Jan 2011||S.C. Johnson Home Storage, Inc.||Valve for a recloseable container|
|US7886412||16 Mar 2007||15 Feb 2011||S.C. Johnson Home Storage, Inc.||Pouch and airtight resealable closure mechanism therefor|
|US7887238||15 Jun 2007||15 Feb 2011||S.C. Johnson Home Storage, Inc.||Flow channels for a pouch|
|US7904996||29 Dec 2009||15 Mar 2011||Pactiv Corporation||Reclosable fasteners or zippers for use with polymeric bags|
|US7946766||15 Jun 2007||24 May 2011||S.C. Johnson & Son, Inc.||Offset closure mechanism for a reclosable pouch|
|US7950851 *||10 Jul 2007||31 May 2011||Thunderbird Global Enterprises, Llc||Plastic bag with imperforated tear area|
|US7967509||15 Jun 2007||28 Jun 2011||S.C. Johnson & Son, Inc.||Pouch with a valve|
|US8070359||6 Dec 2011||Thunderbird Global Enterprises, Llc||Plastic bag with pour spout and reinforced bottom end|
|US8176604||23 Jul 2010||15 May 2012||S.C. Johnson & Son, Inc.||Pouch and airtight resealable closure mechanism therefor|
|US8231273||17 Dec 2010||31 Jul 2012||S.C. Johnson & Son, Inc.||Flow channel profile and a complementary groove for a pouch|
|US8523437 *||20 Nov 2002||3 Sep 2013||Sargento Foods, Inc.||Resealable bag for filling with food product (s) and method|
|US8540428 *||27 Jun 2007||24 Sep 2013||Idemitsu Unitech Co., Ltd.||Easily tearable fastener tape, method of producing the fastener tape, packaging bag with easily tearable fastener tape, and device and method for producing the packaging bag|
|US8753011 *||28 Sep 2007||17 Jun 2014||Idemitsu Unitech Co., Ltd||Easily openable fastener tape, packaging bag with easily openable fastener tape, and method of manufacturing easily openable fastener tape|
|US8827556||16 Dec 2010||9 Sep 2014||S.C. Johnson & Son, Inc.||Pouch and airtight resealable closure mechanism therefor|
|US8858077||1 Apr 2011||14 Oct 2014||Velcro Industries B.V.||Reclosable pouch closures and related packaging and methods|
|US9011003||31 Jan 2007||21 Apr 2015||S.C. Johnson Home Storage, Inc.||Reclosable pouch and zipper for a reclosable pouch|
|US9085393 *||19 Oct 2010||21 Jul 2015||Idemitsu Unitech Co., Ltd.||Easy to open zipper tape, and packaging bag with easy to open zipper tape|
|US20040208399 *||16 Apr 2003||21 Oct 2004||Ron Linneweil||Closure for containers and reclosable containers including the same|
|US20040234173 *||30 Apr 2004||25 Nov 2004||Saad Zain E.M.||Closure device for a reclosable pouch|
|US20040256761 *||17 Jun 2003||23 Dec 2004||Pawloski James C.||Method of and apparatus for producing a reclosable pouch|
|US20050031232 *||20 Nov 2002||10 Feb 2005||Jean-Claude Jammet||Package such as a bag with oriented tear opening|
|US20050157959 *||16 Jan 2004||21 Jul 2005||Johnson Joel L.||Easy-open shrouded slider-zipper assembly for reclosable bag|
|US20050238265 *||27 Jun 2005||27 Oct 2005||Illinois Tool Works Inc.||Easy open feature for reclosable bags having a longitudinal fin seal|
|US20060034551 *||16 Aug 2005||16 Feb 2006||Ron Linneweil||Reclosable containers|
|US20110243481 *||8 Dec 2009||6 Oct 2011||Shuichi Goto||Packaging bag with zipper tape, device and method for manufacturing packaging bag, and band-like member for bending|
|US20120020590 *||4 Feb 2010||26 Jan 2012||Idemitsu Unitech Co., Ltd.||Easily tearable zipper tape and packaging bag with easily tearable zipper tape|
|US20120207409 *||19 Oct 2010||16 Aug 2012||Ryo Katada||Easy to open zipper tape, and packaging bag with easy to open zipper tape|
|US20120275730 *||6 Dec 2010||1 Nov 2012||Idemitsu Unitech Co., Ltd.||Zipper tape and packaging bag with zipper tape|
|US20120308166 *||6 Jun 2012||6 Dec 2012||Vonco Products, Inc.||Easy open flexible container|
|USRE34905 *||18 Nov 1993||18 Apr 1995||Minigrip, Inc.||Method and apparatus for making reclosable bags in a form, fill and seal machine|
|USRE39505 *||25 Aug 2003||13 Mar 2007||Pactiv Corporation||Fill-through-the-top package and method and apparatus for making the same|
|USRE40284||1 Nov 2006||6 May 2008||Pactiv Corporation||Methods of making and filling a fill-through-the-top package|
|DE2619437A1 *||3 May 1976||5 May 1977||Asf Gleitverschluss Gmbh||Verfahren und vorrichtung zum verbinden einer folie mit mindestens einem eine verbindungsprofilleiste tragenden band, vorzugsweise zur herstellung von aus einer kunststoffolie gebildeten beuteln|
|DE4227628A1 *||20 Aug 1992||15 Jul 1993||Hosokawa Yoko Kk||Reissverschluss-beutel und verfahren zu ihrer herstellung|
|DE4227628C2 *||20 Aug 1992||17 Feb 2000||Hosokawa Yoko Kk||Verfahren zum Herstellen von Reißverschlußbeuteln und derartige Beutel|
|EP0134806A1 *||10 Jan 1984||27 Mar 1985||Creative Products Resource Associates Ltd.||Resealable dispensing container for folded towels|
|EP0302144A2||19 Dec 1987||8 Feb 1989||Minigrip Europe Gmbh||Reclosable bag having an outer reclosable zipper type closure and inner non-reclosable closure|
|EP0423456A1 *||16 Aug 1990||24 Apr 1991||Illinois Tool Works Inc.||Modified zipper elements for easy open containers|
|EP0547966A1 *||16 Dec 1992||23 Jun 1993||Minigrip, Incorporated||Tamper-evident zipper closed package|
|EP0921987A1 *||14 Aug 1997||16 Jun 1999||Tenneco Packaging Inc.||Tamper-evident reclosable plastic bag with slider-type zipper|
|EP1263655A1 *||15 Sep 2000||11 Dec 2002||Sargento Foods Inc.||A resealable bag for filling with food product(s) and method|
|EP1325872A1 *||18 Sep 2000||9 Jul 2003||Idemitsu Petrochemical Co., Ltd.||Fastener bag and fastener device|
|EP1431203A1 *||8 Dec 2003||23 Jun 2004||ASF Verwaltungs GmbH||Slide fastener, slide fastener band and reclosable bag|
|EP2511186A1 *||6 Dec 2010||17 Oct 2012||Idemitsu Unitech Co. Ltd.||Zipper tape and packaging bag with zipper tape|
|WO1996017792A1 *||5 Dec 1995||13 Jun 1996||Rexam Medical Packaging Inc||Polymeric package opening structure|
|WO1998006635A1 *||14 Aug 1997||19 Feb 1998||Tenneco Packaging Inc||Tamper-evident reclosable plastic bag with slider-type zipper|
|WO2001032521A1||15 Sep 2000||10 May 2001||Sargento Foods Inc||A resealable bag for filling with food product(s) and method|
|WO2003045816A2 *||20 Nov 2002||5 Jun 2003||Jean-Claude Jammet||Package, such as a bag, with oriented tear-opening|
|WO2003066438A1 *||4 Feb 2003||14 Aug 2003||Reynolds Consumer Prod||Method and apparatus for forming a reclosable package|
|WO2015049501A1 *||30 Sep 2014||9 Apr 2015||Techtex Holdings Limited||Packaging|
|U.S. Classification||383/204, 383/908, 383/65|
|International Classification||B29C65/00, B65D33/25, B65D75/58|
|Cooperative Classification||B65D75/5805, B65D33/2533, B29C66/4722, Y10S383/908|
|European Classification||B29C66/4722, B65D75/58B, B65D33/25A1C|
|4 Dec 1991||AS||Assignment|
Owner name: NMB POSTBANK GROEP N.V., NEW YORK
Free format text: SECURITY INTEREST;ASSIGNOR:RICE GROWERS ASSOCIATION OF CALIFORNIA, A CA CORPORATION;REEL/FRAME:005941/0531
Effective date: 19911112
|4 Dec 1991||AS06||Security interest|
Owner name: NMB POSTBANK GROEP N.V.
Owner name: RICE GROWERS ASSOCIATION OF CALIFORNIA, A CA CORPO
Effective date: 19911112
|30 Aug 1988||RF||Reissue application filed|
Effective date: 19870312
|11 Apr 1984||AS||Assignment|
Owner name: MINIGRIP, INC. ROUTE 303, ORANGEBURG NEW YORK A CO
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:SEISAN NIPPON SHA., LTD;REEL/FRAME:004257/0414
Effective date: 19840216
|11 Apr 1984||AS02||Assignment of assignor's interest|
Owner name: MINIGRIP, INC. ROUTE 303, ORANGEBURG NEW YORK A CO
Owner name: SEISAN NIPPON SHA., LTD
Effective date: 19840216