CA2035195A1 - Easy open tamper-evident recloseable package - Google Patents
Easy open tamper-evident recloseable packageInfo
- Publication number
- CA2035195A1 CA2035195A1 CA002035195A CA2035195A CA2035195A1 CA 2035195 A1 CA2035195 A1 CA 2035195A1 CA 002035195 A CA002035195 A CA 002035195A CA 2035195 A CA2035195 A CA 2035195A CA 2035195 A1 CA2035195 A1 CA 2035195A1
- Authority
- CA
- Canada
- Prior art keywords
- package
- web
- seal
- recloseable
- fastener elements
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
- B65D75/52—Details
- B65D75/58—Opening or contents-removing devices added or incorporated during package manufacture
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D33/00—Details of, or accessories for, sacks or bags
- B65D33/16—End- or aperture-closing arrangements or devices
- B65D33/25—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners
- B65D33/2508—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D33/00—Details of, or accessories for, sacks or bags
- B65D33/16—End- or aperture-closing arrangements or devices
- B65D33/25—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners
- B65D33/2508—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor
- B65D33/2516—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor comprising tamper-indicating means, e.g. located within the fastener
- B65D33/2525—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor comprising tamper-indicating means, e.g. located within the fastener located between the fastener and the product compartment
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bag Frames (AREA)
- Packages (AREA)
Abstract
EASY OPEN TAMPER-EVIDENT RECLOSEABLE PACKAGE
ABSTRACT OF THE DISCLOSURE
A flexible, recloseable package includes a recloseable seal disposed near the mouth of the package and a frangible web connecting the recloseable seal components. A peel seal is disposed between the recloseabls seal and the package product. Attempts to open the peel seal and/or gain access to the package product will result in noticeable disruption of the frangible web.
ABSTRACT OF THE DISCLOSURE
A flexible, recloseable package includes a recloseable seal disposed near the mouth of the package and a frangible web connecting the recloseable seal components. A peel seal is disposed between the recloseabls seal and the package product. Attempts to open the peel seal and/or gain access to the package product will result in noticeable disruption of the frangible web.
Description
`` 2~3`3~
EtA51r OPlS~lil TlUtP13R- I~VIDE~$ RI~CLOSE~ABLIS PACl~l~
Backqround and Summary of the Invention The present invention relates generally to recloseable package~ for hermetically sealing con~umable products between generally opposing package side panel~, and more particularly to recloseable p~ckages for ~ood products and the like having a peelable seal which secures together a product acce~ edge of the package and which has a tamper-evident feature indicating prior opening of the package.
Flexible packages which have an inner, hermetic peelable seal and an outer zipper seal are presently known for packaging various fooa products, such as wieners, bacon, sliced luncheon meats, chop~, cheese and the like. A common use of such packaging is to vacuum seal the food produce between ~wo sheet~ of film material ~o form a g~nerally rectangularly shap~d package which is hermetically seal~d (e.g., heat sealed) with a single, non-recloseable seal about three sides and which has an acce~ opening at the fourth siae which includes both a hermetic, non-recloseable seal and a reclo~ure ~eal.
When the acce~ opening con~ists of an ou~er zipper reclo ure seal an~ an inner, non-reclo~eable, peel qeal, it has been found ~hat the package may be openea an~ then reclosed wi~hout showing outwardly visible evidence of such op~nings. Thus, a package which ha~ been openea an~ therez~ter Leclosed, but from ~ ~ 3 ;~
which no contents have been removed, woul~ have an outward appearance comparable to a package which retain~
its inner, hermetic peel seal. A consumer who purchases and thereafter openQ a previously-opened package would, of course, especially for vacuum-packed products, be able to determine that the hermetic seal has been broken. Determining that a gas-flushed package ha~ been previously opened might possibly be more difficult. It would, however, be preferred that it be readily apparent to the consumer in the store (i.e., before purchase~
that the package had been previously opened.
Packages constructed in accordance with the principles of the present invention are tamper evident so that it is apparent to the consumer that the package has been opened upon ca~ual examination of the package.
Due to the hermetic peel seal, the package is liquid tight ana suitably retains with the package, fluids of products containea therein, including water, juices, oils and the like. The package has a first, recloseable seal which can be opened and closed rPpeatedly in order to remove portions of the package contents. A zipper seal consisting of interengaging rib and groove fastener elements is the preferred recloseable seal means.
In aaqition, the package has a second, hermetic inner seal which is an easy open or peel seal.
The peel seal i8 generally parallel to the recloseable seal and i~ opened with digital pull-apart forces which may be a continuation o~ the ~orces u ed to open the recloseable seal. Tbe peel seal can m~int~in a vacuum, pressurized and/or a modified gaseou~ environment within the flexible package. The peel seal will be forme~ by effecting a face-to-face ~eal betwee~ two plys of plastic film with the strength of the seal permitting separation without destruction or tearing of either ply.
The paokage of this invention further includes a tamper-evident feature which is dispose~ in the 2`~3~ ~Qj package neck area between the recloseable seal and the hermetic peel seal which must be disrupted in order to gain acces~ to the product. The disruption of the ~amper-evident feature will provide visible evidence of the fact that entry to the contents of the bag, through the reclosure seal ana the inner peel seal, may have occurred.
The present invention is directed to an improved reclo~eable package which provide~ reaaily discernible eviaence of tampering.
In a recloseable package incorporating the principle~ of the present invention, evidence of tampering or prior opening of the package is accomplished by way of a fleYible web whioh extends between the rib and groove fastener elemsnts of a recloseable seal and which must be broken to reach the peel ~eal.
In one principal aspect of the present invention, the recloseable package has a first, recloseable seal assembly disposea near the access edge of the package an~ has a second, peelable hermetic seal aisposea beneath the recloseable seal and near the product contained in the packageO The recloseable seal assembly incluaes a web extending between the two opposing sidewalls, which web contains an area of frangibilityO When the recloseable seal is opened to a width to allow access to and opening o~ the second, hermetic peel seal, the we~ is either partially torn or separates into two separate web portions at the area of frangibility, thereby indicating prior opening.
Accordingly, it is a general object of the present invention to proviae an impsoved tamper-evi~ent package having a first, recloseable and a second, peel seal witbout ad~ing additonal space on the package.
Anothe~ object of the present invention is to provi~e a recloseable package for food products having a recloseable seal disposed near an opening of the package, a peelable hermetic seal disposea near the food r .~ ~.
~4~
product and a tamper-evident strip which e~tenc~ beneath the recloseable seal an~ above the peel seal and which strip indicate~ tampering with the peel seal.
Yet another object of the present invention i8 to proviae an improved proauct package that incorporates a first, recloseable seal having integral tamper-evident characteristics in combination with a second hermetic peelable seal without incurring any, or only minimal, co~t upcharge.
Still another object of the present invention is to provide a flexible food product package which has a recloseable seal and a peelable hermetic seal disposed parallel to each other proYimate to an acce~s edge of the food product package, the package having a frangible web extending between two opposing package sidewalls proximate to the recloseable seal, the frangible web having a central fold line so that, when folded upon itself, the web extends beneath the recloseable seal.
It is yet a ~urther object of the present invention to provide a one-piece recloseable fastener-web assembly for use in a recloseable package, wherein opposed rib an~ groove fastener elements are disposea along a common face of a frangible web, the web being secured to two opposing package sidewalls and the web providing a tamper-evident feature for the package.
~ hese and other features ana objects o~ the present invention will become more reaaily apparent from a reading of the following detaile~ description.
Brief DescriDtion of the Drawinqs Figure 1 is a perspective view of the top portion of a package incorporating a tamper-evident strip constructed in aecor~ance with the principles of the present invention~ For purposes of illustration only the package is shown as containing vacuum-packed wieners;
~ 3 Figure 2 is a cros6-sectional view taken along line 2-2 of Figure l;
Figure 3 i5 a perspective view, partially cut away showing the recloseable seal being opened ana the tamper-evident web partially separated;
Figure 4 is a cross-sectional end view of the package shown in Figure 3;
Figure 5 is a plan view of another embodiment of a tamper-evident ~trip; and 10Figure 6 i8 a cross-sectional view of the top portion of a package incorporating the embodiment of the tamper-eviaent strip ~hown in Figure 5.
Detailea Description o~ the Invention 15FIG. 1 illustrates a first embo~iment of a tamper-evident recloseable package 10 constructed in accoraance with the principles of the present invention.
The packages 10 of the present invention are particularly suitable for sealing a food proauct, shown in the drawings as wieners 12, between two sheets or panels 14, 16 of flexible film material. The package panels 14, 16 forming the packages according to the present invention can be made from a variety of materials including plastic films, multi-layered laminates or co-e~tru~ions, thermoformable materials and the like. A preferred plastic film for assembly o~ the packages of the present invention is one which i8 imperviouR to air, oxygen or moisture. When ~he package 10 i8 ~or~ed from a laminated construction, it i8 de~irable to u~e a thin, inner layer ~hich i imperviou to air, oxygen or moisture in combination with an outer layer having a sufficient stiffness so that the laminate can function as a bag wall. For purposes of illustration and ~iscussion, each package panel will be shown as a single heat-sealable lamina. In actual prac~ice, each bag panel will likely be a laminate of two or more layers which will provide sufficient protection to the product (e.g., oxygen and moisture barriers) and which can form a peelable, hermetic ~eal at their inner surfaces. As is known in the ~rt, a surface of ~Saran~, a vinylidene chloride-vinyl chloride copolymer, in contact with a surface of ethylene vinyl acetate can form such bonds.
The basic package 10 is formed by positioning the two film ~hee~s in an oppo~ing, abutting relationship and securing the film sheets 14, 16 on three sides by non-peelable seals 18 along the periphery or permiter 20 of the package lO. When the periphery 20 of the package lO i~ sealed, a package mouth or access area 22 i8 defined. The peripheral sealing can be accompli~he~ by processes well known by the art such as heat sealing or adhesive sealing.
As best seen in FIGS. 2 and 3, the package also has a first, recloseable seal 24 illustrated as a conventional interengaging ~astener assembly 26 such as a rib and groove fastener assembly. The interengaging fastener as~embly 26 includes a length of a formed rib element strip 28 disposed proximate and generally parallel to the package mouth 22 on a Pace 30 of an interior package siaewall 32. The rib 50 projects outwardly ~rom the rib element strip 28 a suf~icient di tance to be 6ecurely interengaged with and held by its confronting ana complementary groove element trip 29. The ~eparate, forme~ groove element strip 29 is disposed oppo~ite the rib elemen~ strip 28 on the con~ronting face 31 of the opposing package ~idewall 33.
The groove element strip 29 includes two outwardly extending walls 52 which de~ine a channel or groove 54 therebetween. The groove 54 is of sufficient wiath to Pirmly engage the rib 50 when the confronting interengaging ~astener strips 28, 29 are pressed together. The interengaging fastener elemen~ ~trips 28, 3 ~ ~ ~ r~
29 are dispo~ed a sufficent distance benea~h the package mouth 22 to provide two opposing pull flange~ 60, 61 on the opposing package sidewalls 32, 33. The extending profiles of the interengaging fastener element strips 28, 29 aid in gripping the pull flanges 60, 61 when opening the package 10. Both the recloseable ~eal 24 and the interengaging fastener assembly 26 can take any number of various oharacteri~ticfi and confiqurations in addition to those de~cribed herein.
Beneath the recloseable sea~ 24, a peelable seal area 36 i8 provided proximate to the food product 12 and generally parallel to the recloseable seal 24~
The peel seal area 36 may be formed by impre6sing the opposing package sidewalls 32, 33 with a heat ~eal bar ~not shown) to thereby form a peelable eal 37 which i8 opened by digital forces between the package front panel 14 and the package rear panel 16. Alternatively, the peel seal area 36 can also be formed by application of an aahesive to secure the package panels together.
In an important aspect of the present invention, a separate, frangible web 38 of package film is provided which connects the interengaging fa~tener elements 28, 29 together to form a fastener-web assembly 39. The frangible web 38 has a preferred predetermined maximum eYtended width, ~, which is less than the distance, L, between the top of the peel seal 37 and the interenqaging fastener element~ 28, 29 such that the web must be broken be~ore the peel seal can be reached and/or i~ opened. ~owever, it will be noted that the maximum extended width, W, of the ~eb can be somewhat greater than L, but less than twice the distance L to achieve the benefit~ of the present invention.
The web 38 is proviaed with severance mean~, in the form of a f rangible portion 44 of the web, illustrated a~ a line of weakening 40, which may take the form of a score line, perforations and the like, 2 ~3 ~
disposed in the general central portion 42 of the web 38 ana generally parallel to tha interengaging fastener elements 28, 29. The line of weakening 40 e~tends for the length of the frangible web 38 an~ define~ two web portions 46, 47 when the web 38 is separatea. The line of weakening 40 may be positioned somewhat offset from the cen~er of the web 38 80 that it can be more readily be determine~ from the exterior that the package 10 had been opened. once the package walls have been pulled far enough apart to break the web 38 along the line of weakening 40, because the separa~ea web portions 46, 47 remain attached to the package sidewalls even upon complete opening, there i8 no waste to discard when the package 10 is opened.
The frangible web line of weakening ~0 may also serve as a fold line extending within the web central portion 42 so that when the web 38 i~ folded upon itself along the line of weakening, the frangible portion 44 (ana the web itself) aepenas downwardly beneath the recloseable seal 24, when the package 10 is sealed. Because the frangible web 38 is located entirely between the peel seal 36 and the recloseable seal 24, it will be appreciated that the tamper evident feature of the present invention requires no a~ditional space on the package 10, particularly becaus~ it i8 completely interior of ana does not extend beyond the reclo eable ~eal 24.
In the package embodimen~ shown in F~GS. 1-4, the web 38 i8 illustrated as a separate fil~ member 49 which is adhered to the confronting faces 30, 31 of the package opposing sidewall~ 32, 33 at the mouth 22 of the package 10. The reclo~eable interengaging fastener element strips 28, 29 are then adherea to the opposing enas 51, 53 of a common face 48 of the web 38. The adherence together of both the web 38 and the recloseable seal interengaging fa tener elements 28, 29 sl ~ ~J ~ !
g may be accomplished by any ~uitable means, such as heat sealing or by aahesive. In such a construction, the frangible web 38 can be easily aaaea to a package having a recloseable seal with minimal packaging machine and/or material modifications.
Another embodiment of a reclo~eable, tamper-evident food proauct package 7a incorporating the principles of the present invention i8 shown in ~IGS~
5-6. The basic structure ~f this second embodiment, such as the recloseable seal interengaging fastener elementR 72, 73 and the peel ~eal 74 i~ the same as that described for the first embodiment. ~owever, in this embodiment, the package 70 utilize~ a one-piece, integral fastener-web assembly 76 wherein the opposed interengaging fastener element~ 72, 73, illustrated as rib and groove elements, are formed inteqral with the frangible web 78. Typically, the interengaging fastener elements 72, 73 will be formed on the web 78 as it is extruded or otherwise manufactured~ The fastener-web assembly 76 is also proviaea with severance means, in the form of a frangible portion 80 of the web 78, illustrated as a line of weakening 82, which may take the form of a score line, perforations ana the like, dispo~ed in the general central portion 84 of the web 78 and ex~ending therein generally parallel to the interengagin~ fa tener elementg 72, 73.
When it i6 desired to open the package 10, the user grips the two pull flange~ 60, 61 at the top of the package 10 and applies digi~al pull apar~ ~orce~
thereto. ~he recloseable interengaging fa tener elements 28, 29 will separate and will pull the frangible web 38 up from its do~nwardly depending general V-shape to an extenaed ~hape. (See FIGS. 3 &
6). Further exertion of digital forces will separate the web 38 along it~ line of weakening 40, thereby allowing access to the peel seal 36, which then may be ~ ~ 3 !~ ~ ~3 r opened by the user upon application of ad~itional digital forces. Therefore, the only way in which acces~
is gained into the package 10 is by breaking the line of weakening ~0.
It will be appreciated that the frangible web 38 provide~ a tamper eviaent device for the package 10.
In an unopened state, ~he frangible web 38 is unbroken and located below or int~rior of the recloseable seal ~4.
After the recloseable seal 24 ha been opened to a sufficient extent to allow acces to the peel seal 37, it will be apparent that access ha& been gained or attempted ~o be gained into the package. Therefore; an in~pection as to whether there has been tampering with the package 10 or the peel seal 37 can be easily done.
After the peel seal 36 has been opened by the purchaser, closing of the package for storage of the enclosed product~ 12 is accomplished by reclosing the interengaging fastener elements 28, 29. The inwardly directed orientation o~ the web portions 46, 47 reduces any possibility that they will interfere with closure of the fa~tener elements 28r 29.
The package of the present invention can be formea in a variety of ways. The package 10 may be formea from two, separate package panels 14, 16 in which three sides thereof are initially appropriately ~ealed to define the outer limits of the package 10 or the package 10 may be formed from a continuou~ ~heet of package ~ilm which i8 folded upon itself to define the bottom edge o~ the packa~e, whereupon the side edges of the package may be appropriately sealed at predetermined intervals to define individual packages.
once the basic package structure is formed ana its opposing sidewalls 32, 33 are defined, the package mouth structure is completed. Typically, the multi-part f astener web assembly 35 or the one piece web assembly 76 may then be attached to the package mouth confronting 2 ~
faces 3~, 31 in any conventional manner such as by heat sealing or adhesive. Prior to attachmsnt, the web is srored or perforated to define its line of weakening 40, and the web i8 folded upon it5elf such tha the centr~l portion 42 of the frangible web 38 depends beneath the recloseable seal 24.
The package 10 may be filled with its products 12 either prior to or af~er completion of the package mouth. Por esample, where it i8 de~ired to fi~l the package 10 through its mouth 22, the peel seal 37 will be cloæed after ~illing the package with the proauct 12, and the fastener-we~ assembly 35 is sub~e~uently attached ~o the upper opposing 6idewalls 32, 33. In other inætances, the package 10 may be ~illed with its intended product 12 through an open ~ide or an open bottom of the package after the formation of the package mouth has been accompli~hed~ In such oase~, it is evident that ~he fastener-web assembly 35 will be attachea to tha package oppo ing siaewall~ 32, 33 prior to filling of the package.
It will thu~ be seen that while certain embodiments o~ the present invention have been ~hown and describea, it will be obvious to tho~e ~killeâ in the art that changes and modif ication~ may be made therein without departing from the true ~pirit o~ the ~cope of the invention.
EtA51r OPlS~lil TlUtP13R- I~VIDE~$ RI~CLOSE~ABLIS PACl~l~
Backqround and Summary of the Invention The present invention relates generally to recloseable package~ for hermetically sealing con~umable products between generally opposing package side panel~, and more particularly to recloseable p~ckages for ~ood products and the like having a peelable seal which secures together a product acce~ edge of the package and which has a tamper-evident feature indicating prior opening of the package.
Flexible packages which have an inner, hermetic peelable seal and an outer zipper seal are presently known for packaging various fooa products, such as wieners, bacon, sliced luncheon meats, chop~, cheese and the like. A common use of such packaging is to vacuum seal the food produce between ~wo sheet~ of film material ~o form a g~nerally rectangularly shap~d package which is hermetically seal~d (e.g., heat sealed) with a single, non-recloseable seal about three sides and which has an acce~ opening at the fourth siae which includes both a hermetic, non-recloseable seal and a reclo~ure ~eal.
When the acce~ opening con~ists of an ou~er zipper reclo ure seal an~ an inner, non-reclo~eable, peel qeal, it has been found ~hat the package may be openea an~ then reclosed wi~hout showing outwardly visible evidence of such op~nings. Thus, a package which ha~ been openea an~ therez~ter Leclosed, but from ~ ~ 3 ;~
which no contents have been removed, woul~ have an outward appearance comparable to a package which retain~
its inner, hermetic peel seal. A consumer who purchases and thereafter openQ a previously-opened package would, of course, especially for vacuum-packed products, be able to determine that the hermetic seal has been broken. Determining that a gas-flushed package ha~ been previously opened might possibly be more difficult. It would, however, be preferred that it be readily apparent to the consumer in the store (i.e., before purchase~
that the package had been previously opened.
Packages constructed in accordance with the principles of the present invention are tamper evident so that it is apparent to the consumer that the package has been opened upon ca~ual examination of the package.
Due to the hermetic peel seal, the package is liquid tight ana suitably retains with the package, fluids of products containea therein, including water, juices, oils and the like. The package has a first, recloseable seal which can be opened and closed rPpeatedly in order to remove portions of the package contents. A zipper seal consisting of interengaging rib and groove fastener elements is the preferred recloseable seal means.
In aaqition, the package has a second, hermetic inner seal which is an easy open or peel seal.
The peel seal i8 generally parallel to the recloseable seal and i~ opened with digital pull-apart forces which may be a continuation o~ the ~orces u ed to open the recloseable seal. Tbe peel seal can m~int~in a vacuum, pressurized and/or a modified gaseou~ environment within the flexible package. The peel seal will be forme~ by effecting a face-to-face ~eal betwee~ two plys of plastic film with the strength of the seal permitting separation without destruction or tearing of either ply.
The paokage of this invention further includes a tamper-evident feature which is dispose~ in the 2`~3~ ~Qj package neck area between the recloseable seal and the hermetic peel seal which must be disrupted in order to gain acces~ to the product. The disruption of the ~amper-evident feature will provide visible evidence of the fact that entry to the contents of the bag, through the reclosure seal ana the inner peel seal, may have occurred.
The present invention is directed to an improved reclo~eable package which provide~ reaaily discernible eviaence of tampering.
In a recloseable package incorporating the principle~ of the present invention, evidence of tampering or prior opening of the package is accomplished by way of a fleYible web whioh extends between the rib and groove fastener elemsnts of a recloseable seal and which must be broken to reach the peel ~eal.
In one principal aspect of the present invention, the recloseable package has a first, recloseable seal assembly disposea near the access edge of the package an~ has a second, peelable hermetic seal aisposea beneath the recloseable seal and near the product contained in the packageO The recloseable seal assembly incluaes a web extending between the two opposing sidewalls, which web contains an area of frangibilityO When the recloseable seal is opened to a width to allow access to and opening o~ the second, hermetic peel seal, the we~ is either partially torn or separates into two separate web portions at the area of frangibility, thereby indicating prior opening.
Accordingly, it is a general object of the present invention to proviae an impsoved tamper-evi~ent package having a first, recloseable and a second, peel seal witbout ad~ing additonal space on the package.
Anothe~ object of the present invention is to provi~e a recloseable package for food products having a recloseable seal disposed near an opening of the package, a peelable hermetic seal disposea near the food r .~ ~.
~4~
product and a tamper-evident strip which e~tenc~ beneath the recloseable seal an~ above the peel seal and which strip indicate~ tampering with the peel seal.
Yet another object of the present invention i8 to proviae an improved proauct package that incorporates a first, recloseable seal having integral tamper-evident characteristics in combination with a second hermetic peelable seal without incurring any, or only minimal, co~t upcharge.
Still another object of the present invention is to provide a flexible food product package which has a recloseable seal and a peelable hermetic seal disposed parallel to each other proYimate to an acce~s edge of the food product package, the package having a frangible web extending between two opposing package sidewalls proximate to the recloseable seal, the frangible web having a central fold line so that, when folded upon itself, the web extends beneath the recloseable seal.
It is yet a ~urther object of the present invention to provide a one-piece recloseable fastener-web assembly for use in a recloseable package, wherein opposed rib an~ groove fastener elements are disposea along a common face of a frangible web, the web being secured to two opposing package sidewalls and the web providing a tamper-evident feature for the package.
~ hese and other features ana objects o~ the present invention will become more reaaily apparent from a reading of the following detaile~ description.
Brief DescriDtion of the Drawinqs Figure 1 is a perspective view of the top portion of a package incorporating a tamper-evident strip constructed in aecor~ance with the principles of the present invention~ For purposes of illustration only the package is shown as containing vacuum-packed wieners;
~ 3 Figure 2 is a cros6-sectional view taken along line 2-2 of Figure l;
Figure 3 i5 a perspective view, partially cut away showing the recloseable seal being opened ana the tamper-evident web partially separated;
Figure 4 is a cross-sectional end view of the package shown in Figure 3;
Figure 5 is a plan view of another embodiment of a tamper-evident ~trip; and 10Figure 6 i8 a cross-sectional view of the top portion of a package incorporating the embodiment of the tamper-eviaent strip ~hown in Figure 5.
Detailea Description o~ the Invention 15FIG. 1 illustrates a first embo~iment of a tamper-evident recloseable package 10 constructed in accoraance with the principles of the present invention.
The packages 10 of the present invention are particularly suitable for sealing a food proauct, shown in the drawings as wieners 12, between two sheets or panels 14, 16 of flexible film material. The package panels 14, 16 forming the packages according to the present invention can be made from a variety of materials including plastic films, multi-layered laminates or co-e~tru~ions, thermoformable materials and the like. A preferred plastic film for assembly o~ the packages of the present invention is one which i8 imperviouR to air, oxygen or moisture. When ~he package 10 i8 ~or~ed from a laminated construction, it i8 de~irable to u~e a thin, inner layer ~hich i imperviou to air, oxygen or moisture in combination with an outer layer having a sufficient stiffness so that the laminate can function as a bag wall. For purposes of illustration and ~iscussion, each package panel will be shown as a single heat-sealable lamina. In actual prac~ice, each bag panel will likely be a laminate of two or more layers which will provide sufficient protection to the product (e.g., oxygen and moisture barriers) and which can form a peelable, hermetic ~eal at their inner surfaces. As is known in the ~rt, a surface of ~Saran~, a vinylidene chloride-vinyl chloride copolymer, in contact with a surface of ethylene vinyl acetate can form such bonds.
The basic package 10 is formed by positioning the two film ~hee~s in an oppo~ing, abutting relationship and securing the film sheets 14, 16 on three sides by non-peelable seals 18 along the periphery or permiter 20 of the package lO. When the periphery 20 of the package lO i~ sealed, a package mouth or access area 22 i8 defined. The peripheral sealing can be accompli~he~ by processes well known by the art such as heat sealing or adhesive sealing.
As best seen in FIGS. 2 and 3, the package also has a first, recloseable seal 24 illustrated as a conventional interengaging ~astener assembly 26 such as a rib and groove fastener assembly. The interengaging fastener as~embly 26 includes a length of a formed rib element strip 28 disposed proximate and generally parallel to the package mouth 22 on a Pace 30 of an interior package siaewall 32. The rib 50 projects outwardly ~rom the rib element strip 28 a suf~icient di tance to be 6ecurely interengaged with and held by its confronting ana complementary groove element trip 29. The ~eparate, forme~ groove element strip 29 is disposed oppo~ite the rib elemen~ strip 28 on the con~ronting face 31 of the opposing package ~idewall 33.
The groove element strip 29 includes two outwardly extending walls 52 which de~ine a channel or groove 54 therebetween. The groove 54 is of sufficient wiath to Pirmly engage the rib 50 when the confronting interengaging ~astener strips 28, 29 are pressed together. The interengaging fastener elemen~ ~trips 28, 3 ~ ~ ~ r~
29 are dispo~ed a sufficent distance benea~h the package mouth 22 to provide two opposing pull flange~ 60, 61 on the opposing package sidewalls 32, 33. The extending profiles of the interengaging fastener element strips 28, 29 aid in gripping the pull flanges 60, 61 when opening the package 10. Both the recloseable ~eal 24 and the interengaging fastener assembly 26 can take any number of various oharacteri~ticfi and confiqurations in addition to those de~cribed herein.
Beneath the recloseable sea~ 24, a peelable seal area 36 i8 provided proximate to the food product 12 and generally parallel to the recloseable seal 24~
The peel seal area 36 may be formed by impre6sing the opposing package sidewalls 32, 33 with a heat ~eal bar ~not shown) to thereby form a peelable eal 37 which i8 opened by digital forces between the package front panel 14 and the package rear panel 16. Alternatively, the peel seal area 36 can also be formed by application of an aahesive to secure the package panels together.
In an important aspect of the present invention, a separate, frangible web 38 of package film is provided which connects the interengaging fa~tener elements 28, 29 together to form a fastener-web assembly 39. The frangible web 38 has a preferred predetermined maximum eYtended width, ~, which is less than the distance, L, between the top of the peel seal 37 and the interenqaging fastener element~ 28, 29 such that the web must be broken be~ore the peel seal can be reached and/or i~ opened. ~owever, it will be noted that the maximum extended width, W, of the ~eb can be somewhat greater than L, but less than twice the distance L to achieve the benefit~ of the present invention.
The web 38 is proviaed with severance mean~, in the form of a f rangible portion 44 of the web, illustrated a~ a line of weakening 40, which may take the form of a score line, perforations and the like, 2 ~3 ~
disposed in the general central portion 42 of the web 38 ana generally parallel to tha interengaging fastener elements 28, 29. The line of weakening 40 e~tends for the length of the frangible web 38 an~ define~ two web portions 46, 47 when the web 38 is separatea. The line of weakening 40 may be positioned somewhat offset from the cen~er of the web 38 80 that it can be more readily be determine~ from the exterior that the package 10 had been opened. once the package walls have been pulled far enough apart to break the web 38 along the line of weakening 40, because the separa~ea web portions 46, 47 remain attached to the package sidewalls even upon complete opening, there i8 no waste to discard when the package 10 is opened.
The frangible web line of weakening ~0 may also serve as a fold line extending within the web central portion 42 so that when the web 38 i~ folded upon itself along the line of weakening, the frangible portion 44 (ana the web itself) aepenas downwardly beneath the recloseable seal 24, when the package 10 is sealed. Because the frangible web 38 is located entirely between the peel seal 36 and the recloseable seal 24, it will be appreciated that the tamper evident feature of the present invention requires no a~ditional space on the package 10, particularly becaus~ it i8 completely interior of ana does not extend beyond the reclo eable ~eal 24.
In the package embodimen~ shown in F~GS. 1-4, the web 38 i8 illustrated as a separate fil~ member 49 which is adhered to the confronting faces 30, 31 of the package opposing sidewall~ 32, 33 at the mouth 22 of the package 10. The reclo~eable interengaging fastener element strips 28, 29 are then adherea to the opposing enas 51, 53 of a common face 48 of the web 38. The adherence together of both the web 38 and the recloseable seal interengaging fa tener elements 28, 29 sl ~ ~J ~ !
g may be accomplished by any ~uitable means, such as heat sealing or by aahesive. In such a construction, the frangible web 38 can be easily aaaea to a package having a recloseable seal with minimal packaging machine and/or material modifications.
Another embodiment of a reclo~eable, tamper-evident food proauct package 7a incorporating the principles of the present invention i8 shown in ~IGS~
5-6. The basic structure ~f this second embodiment, such as the recloseable seal interengaging fastener elementR 72, 73 and the peel ~eal 74 i~ the same as that described for the first embodiment. ~owever, in this embodiment, the package 70 utilize~ a one-piece, integral fastener-web assembly 76 wherein the opposed interengaging fastener element~ 72, 73, illustrated as rib and groove elements, are formed inteqral with the frangible web 78. Typically, the interengaging fastener elements 72, 73 will be formed on the web 78 as it is extruded or otherwise manufactured~ The fastener-web assembly 76 is also proviaea with severance means, in the form of a frangible portion 80 of the web 78, illustrated as a line of weakening 82, which may take the form of a score line, perforations ana the like, dispo~ed in the general central portion 84 of the web 78 and ex~ending therein generally parallel to the interengagin~ fa tener elementg 72, 73.
When it i6 desired to open the package 10, the user grips the two pull flange~ 60, 61 at the top of the package 10 and applies digi~al pull apar~ ~orce~
thereto. ~he recloseable interengaging fa tener elements 28, 29 will separate and will pull the frangible web 38 up from its do~nwardly depending general V-shape to an extenaed ~hape. (See FIGS. 3 &
6). Further exertion of digital forces will separate the web 38 along it~ line of weakening 40, thereby allowing access to the peel seal 36, which then may be ~ ~ 3 !~ ~ ~3 r opened by the user upon application of ad~itional digital forces. Therefore, the only way in which acces~
is gained into the package 10 is by breaking the line of weakening ~0.
It will be appreciated that the frangible web 38 provide~ a tamper eviaent device for the package 10.
In an unopened state, ~he frangible web 38 is unbroken and located below or int~rior of the recloseable seal ~4.
After the recloseable seal 24 ha been opened to a sufficient extent to allow acces to the peel seal 37, it will be apparent that access ha& been gained or attempted ~o be gained into the package. Therefore; an in~pection as to whether there has been tampering with the package 10 or the peel seal 37 can be easily done.
After the peel seal 36 has been opened by the purchaser, closing of the package for storage of the enclosed product~ 12 is accomplished by reclosing the interengaging fastener elements 28, 29. The inwardly directed orientation o~ the web portions 46, 47 reduces any possibility that they will interfere with closure of the fa~tener elements 28r 29.
The package of the present invention can be formea in a variety of ways. The package 10 may be formea from two, separate package panels 14, 16 in which three sides thereof are initially appropriately ~ealed to define the outer limits of the package 10 or the package 10 may be formed from a continuou~ ~heet of package ~ilm which i8 folded upon itself to define the bottom edge o~ the packa~e, whereupon the side edges of the package may be appropriately sealed at predetermined intervals to define individual packages.
once the basic package structure is formed ana its opposing sidewalls 32, 33 are defined, the package mouth structure is completed. Typically, the multi-part f astener web assembly 35 or the one piece web assembly 76 may then be attached to the package mouth confronting 2 ~
faces 3~, 31 in any conventional manner such as by heat sealing or adhesive. Prior to attachmsnt, the web is srored or perforated to define its line of weakening 40, and the web i8 folded upon it5elf such tha the centr~l portion 42 of the frangible web 38 depends beneath the recloseable seal 24.
The package 10 may be filled with its products 12 either prior to or af~er completion of the package mouth. Por esample, where it i8 de~ired to fi~l the package 10 through its mouth 22, the peel seal 37 will be cloæed after ~illing the package with the proauct 12, and the fastener-we~ assembly 35 is sub~e~uently attached ~o the upper opposing 6idewalls 32, 33. In other inætances, the package 10 may be ~illed with its intended product 12 through an open ~ide or an open bottom of the package after the formation of the package mouth has been accompli~hed~ In such oase~, it is evident that ~he fastener-web assembly 35 will be attachea to tha package oppo ing siaewall~ 32, 33 prior to filling of the package.
It will thu~ be seen that while certain embodiments o~ the present invention have been ~hown and describea, it will be obvious to tho~e ~killeâ in the art that changes and modif ication~ may be made therein without departing from the true ~pirit o~ the ~cope of the invention.
Claims (27)
1. A recloseable, flexible package for hermetically sealing a food product and the like between two opposing package sidewalls and having tamper-evident means comprising, in combination:
two opposing package flexible sidewalls sealed together to form a flexible package having a mouth portion;
continuous recloseable flexible fastener means disposed along confronting surfaces of the two opposing package sidewalls, the continuous recloseable fastener means including opposed interengaging fastener elements disposed near said mouth portion of said flexible package;
tamper-evident means in the form of a frangible web extending between said continuous recloseable fastener means, the frangible web including a line of weakening disposed between said continuous recloseable fastener means, said frangible web being located interior of said continuous recloseable fastener means when said opposed interengaging fastener elements are engaged, said frangible web separating when said intsrengaging fastener elements are disengaged to reveal prior opening of said package; and a hermetic peel seal adjacent to the intended access location of the food product and interior of said continuous recloseable fastener means.
two opposing package flexible sidewalls sealed together to form a flexible package having a mouth portion;
continuous recloseable flexible fastener means disposed along confronting surfaces of the two opposing package sidewalls, the continuous recloseable fastener means including opposed interengaging fastener elements disposed near said mouth portion of said flexible package;
tamper-evident means in the form of a frangible web extending between said continuous recloseable fastener means, the frangible web including a line of weakening disposed between said continuous recloseable fastener means, said frangible web being located interior of said continuous recloseable fastener means when said opposed interengaging fastener elements are engaged, said frangible web separating when said intsrengaging fastener elements are disengaged to reveal prior opening of said package; and a hermetic peel seal adjacent to the intended access location of the food product and interior of said continuous recloseable fastener means.
2. The package of claim 1, wherein said two opposing package sidewalls are formed from a flexible oxygen-impermeable, laminated package film, one package sidewall having an inner surface laminate of Saran, the other package sidewall having an inner surface laminate of ethylene vinyl acetate.
3. The package of claim 1, wherein said frangible web and recloseable fastener means are extruded as a one-piece fastener-web assembly, the fastener-web assembly having a preselected width, said opposed interengaging fastener elements being disposed on opposite ends of said fastener-web assembly.
4. The package of claim 1, wherein said frangible web line of weakening is a line of perforations extending generally parallel to said opposed interengaging fastener elements.
5. The package of claim 1, wherein said frangible web line of weakening is a line of perforations disposed generally parallel to said opposed interengaging fastener elements and said frangible web is folded upon itself along the line of weakening.
6. The package of claim 1, wherein the width of said frangible web in an extended position is less than the distance between said opposed interengaging fastener elements and said hermetic peel seal.
7. The package of claim 1, wherein said opposed interengaging fastener elements are disposed on a common face of and at opposite ends of said frangible web to form a fastener-web assembly, said fastener-web assembly having a width in an extended position which is less than the distance between said opposed rib and groove fastener elements and said hermetic peel seal.
8. The package of claim 1, wherein said frangible web is adhered to said opposing package sidewalls by heat sealing.
9, The package of claim 1, wherein said frangible web is adhered to said opposing package sidewalls by adhesive means.
10. The package of claim 1, wherein Raid frangible web is folded upon itself along said line of weakening into a general V-shape, such that said frangible web projects interiorly into said package above said peel seal.
11. The package of claim 1, wherein said package contains a meat food product.
12. A tamper-evident package for hermetically sealing products between generally opposing package panels having a peelable seal and a recloseable seal, the peelable seal securing the generally opposing package panels together at a peelable seal area, the peelable seal being openable with digital forces, the recloseable seal further securing the generally opposing package panels together at a recloseable seal area, the recloseable seal being openable with digital forces and recloseable, tamper-evidence means for indicating that the generally opposing package panels have been separated at the recloseable seal the tamper-evidence means being contained between said generally opposing package panels substantially within an area between said recloseable seal and said peelable seal, said tamper-evidence means including a web extending between said generally opposing package panels, the web being folded upon itself and depending interiorly of said recloseable seal when said package is initially sealed, said web further including severance means disposed between two ends of said web, said web at least partially restricting access to said products, said web separating into two separate web portions when digital forces are applied to said recloseable seal and providing evidence that said package has been opened.
13. The package of claim 12, wherein said generally opposing panels include oxygen-impermeable film and said package is for enclosing perishable food products.
14. The package of claim 12, wherein said recloseable seal includes a recloseable seal member having opposed interengaging fastener elements, the interengaging fastener elements being disposed on opposing ends of said web, said web being folded upon itself in order or orient said interengaging fastener elements into alignment with each other and in order to define a folded portion of said web, the severance means being disposed on said folded portion and including a line of weakening disposed generally adjacent and parallel to said interengaging fastener elements of said web.
15. The package of claim 14, wherein said interengaging fastener elements include interengaging rib and groove elements.
16. The package of claim 14, wherein said fastener elements and said web are a one-piece unit which is secured between said generally opposing package panels proximate to an access edge of said package.
17. The package of claim 12, wherein said web and recloseable seal are an extruded as a one-piece web assembly, said web assembly having opposed interengaging fastener elements disposed on a common face of and at opposite ends of said web assembly.
18. The package of claim 17 wherein said web assembly is secured to said generally opposing package panels by adhesive means.
19. The package of claim 17, wherein said web assembly is secured to said generally opposing package panels by heat sealing.
20. The package of claim 12, wherein said package contains meat food products.
21. A flexible plastic package for enclosing a product between two opposing package sidewalls, the package being defined by a permanent seal along three edges of the package, the fourth edge of said package providing a package mouth for accessing said product, said package having a recloseable seal for securing the opposing package sidewalls together near the mouth of said package to close the mouth of said package, the recloseable seal including interengaging fastener elements which cooperate, when engaged, to provide a recloseable seal for said package mouth, said package further including a peel seal portion between said recloseable seal and the package product, said peel seal portion including a hermetic peel seal disposed therein proximate to said product, a web extending between said opposing package sidewalls, said interengaging fastener elements being disposed on a common face and opposite ends of said web, said web being folded upon itself to define a web folded portion which extends interior of said recloseable seal and above aid hermetic peel seal, the web folded portion including an area of frangibility disposed within the general center of said web folded portion, said web providing a tamper evident barrier disposed between said recloseable seal and said peel seal, access to said peel seal and said product being accomplished when said web is broken along its area of frangibility, thereby indicating prior opening of said package.
22. The package of claim 21, wherein said web and said interengaging fastener elements are an inegral one-piece assembly which is secured by heat sealing to said two opposing package panels.
23. The package of claim 21, wherein said interengaging fastener elements are integrally formed with said web as a one-piece assembly which is secured to said two opposing panels near said package access edge by adhesive means.
24. The package of claim 21, wherein said the width of said web in an extended position is less than the distance between said interengaging fastener elements and said peel seal.
25. The package of claim 21, wherein said product enclosed said package is a meat product.
26. A recloseable, flexible package for hermetically sealing a food meat product between two opposing package sidewalls and having tamper-evident means for indicating prior opening of the package, comprising, in combination:
two opposing, flexible oxygen-impermeable film, package sidewalls sealed together to define a flexible package sealed at three sides and having a fourth side containing a package mouth portion, continuous recloseable fastener means providing a recloseable package seal disposed along confronting surfaces of the two opposing package sidewalls, the continuous recloseable fastener means including opposed interengaging fastener elements disposed along a common face and opposite ends of a fastener-web assembly extending between the interengaging fastener elements, the web of said fastener-web assembly having a frangible portion disposed between said interengaging fastener elements, said web separating at the frangible portion thereof when said interengaging fastener elements are disengaged, said web thereby indicating prior opening of said package, said web frangible portion including a line of weakening disposed between said interengaging fastener elements, the line of weakening being generally parallel to said interengaging fastener elements, said web further being folded upon itself when said interengaging fastener elements are engaged, the fastener-web assembly having a preselected width in an extended position which is less than the distance between said recloseable seal and said peel seal, said package further including a hermetic peel seal disposed proximate to the food meat product and between said interengaging fastener elements and said food meat product.
two opposing, flexible oxygen-impermeable film, package sidewalls sealed together to define a flexible package sealed at three sides and having a fourth side containing a package mouth portion, continuous recloseable fastener means providing a recloseable package seal disposed along confronting surfaces of the two opposing package sidewalls, the continuous recloseable fastener means including opposed interengaging fastener elements disposed along a common face and opposite ends of a fastener-web assembly extending between the interengaging fastener elements, the web of said fastener-web assembly having a frangible portion disposed between said interengaging fastener elements, said web separating at the frangible portion thereof when said interengaging fastener elements are disengaged, said web thereby indicating prior opening of said package, said web frangible portion including a line of weakening disposed between said interengaging fastener elements, the line of weakening being generally parallel to said interengaging fastener elements, said web further being folded upon itself when said interengaging fastener elements are engaged, the fastener-web assembly having a preselected width in an extended position which is less than the distance between said recloseable seal and said peel seal, said package further including a hermetic peel seal disposed proximate to the food meat product and between said interengaging fastener elements and said food meat product.
27. The package of claim 26, wherein said frangible web and recloseable fastener means are extruded as one-piece fastener-web assembly.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US48391690A | 1990-02-22 | 1990-02-22 | |
| US483,916 | 1990-02-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2035195A1 true CA2035195A1 (en) | 1991-08-23 |
Family
ID=23922015
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002035195A Abandoned CA2035195A1 (en) | 1990-02-22 | 1991-01-29 | Easy open tamper-evident recloseable package |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0443867A1 (en) |
| JP (1) | JPH04215954A (en) |
| CA (1) | CA2035195A1 (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1072043A (en) * | 1996-08-27 | 1998-03-17 | Meiwa Packs:Kk | Packaging bag |
| US6477820B1 (en) | 1999-07-29 | 2002-11-12 | Kraft Foods Holdings, Inc. | Method of making a package with a zipper closure |
| US6461043B1 (en) * | 2000-05-24 | 2002-10-08 | Colgate Palmolive Company | Reclosable bag |
| US6616333B2 (en) | 2000-09-22 | 2003-09-09 | Kraft Foods Holdings, Inc. | Fastener closure arrangement for flexible packages |
| US6769229B2 (en) | 2001-08-30 | 2004-08-03 | Kraft Foods Holdings, Inc. | Method for manufacturing flexible packages having slide closures |
| US6675558B2 (en) | 2001-04-18 | 2004-01-13 | Kraft Foods Holdings, Inc. | Method for manufacturing flexible packages having slide closures |
| US6688080B2 (en) | 2001-04-18 | 2004-02-10 | Kraft Foods Holdings, Inc. | Method for manufacturing flexible packages having slide closures |
| US6688079B2 (en) | 2001-04-18 | 2004-02-10 | Kraft Foods Holdings, Inc. | Method for manufacturing flexible packages having slide closures |
| EP1338525A3 (en) * | 2002-02-04 | 2004-05-26 | Illinois Tool Works Inc. | Reclosable packaging |
| US8122687B2 (en) | 2003-07-31 | 2012-02-28 | Kraft Foods Global Brands Llc | Method of making flexible packages having slide closures |
| JP2005231677A (en) * | 2004-02-19 | 2005-09-02 | Dainippon Printing Co Ltd | Bag with chuck tape |
| JP4783033B2 (en) * | 2005-02-18 | 2011-09-28 | 株式会社共和 | Tamper-evident bag |
| US10011397B2 (en) | 2014-05-19 | 2018-07-03 | Illinois Tool Works Inc. | Enhancements to spaced multi-rib closure |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2417385A1 (en) * | 1978-02-16 | 1979-09-14 | Flexico France Sarl | Film extrusion dies to make bags with press fit closures - to simplify bag fabrication or assembly |
| FR2546481B1 (en) * | 1983-05-27 | 1986-05-30 | Flexico France Sarl | INVIOLABLE BAG, OF THE EXTRUDED PLASTIC MATERIAL TYPE, WITH CLOSURE STRIPS WITH COUPLING PROFILES; CLOSURE STRIPES FOR FITTING SUCH A BAG |
| US4925316A (en) * | 1986-08-11 | 1990-05-15 | Minigrip, Inc. | Reclosable bag having an outer reclosable zipper type closure and inner non-reclosable closure |
| CA2019761C (en) * | 1989-06-30 | 2000-04-25 | Gerald O. Hustad | Tamper-evident, flexible, reclosable packages |
-
1991
- 1991-01-29 CA CA002035195A patent/CA2035195A1/en not_active Abandoned
- 1991-02-22 EP EP91301423A patent/EP0443867A1/en not_active Withdrawn
- 1991-02-22 JP JP2873591A patent/JPH04215954A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04215954A (en) | 1992-08-06 |
| EP0443867A1 (en) | 1991-08-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued | ||
| FZDE | Discontinued |
Effective date: 19950729 |