CA2177674A1 - Easy-open flexible bag for compressed articles - Google Patents
Easy-open flexible bag for compressed articlesInfo
- Publication number
- CA2177674A1 CA2177674A1 CA002177674A CA2177674A CA2177674A1 CA 2177674 A1 CA2177674 A1 CA 2177674A1 CA 002177674 A CA002177674 A CA 002177674A CA 2177674 A CA2177674 A CA 2177674A CA 2177674 A1 CA2177674 A1 CA 2177674A1
- Authority
- CA
- Canada
- Prior art keywords
- bag
- weakness
- line
- articles
- flexible
- 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
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B61/00—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages
- B65B61/02—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for perforating, scoring, slitting, or applying code or date marks on material prior to packaging
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B9/00—Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
- B65B9/06—Enclosing successive articles, or quantities of material, in a longitudinally-folded web, or in a web folded into a tube about the articles or quantities of material placed upon it
- B65B9/08—Enclosing successive articles, or quantities of material, in a longitudinally-folded web, or in a web folded into a tube about the articles or quantities of material placed upon it in a web folded and sealed transversely to form pockets which are subsequently filled and then closed by sealing
-
- 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
- B65D75/5827—Tear-lines provided in a wall portion
- B65D75/5833—Tear-lines provided in a wall portion for tearing out a portion of the wall
-
- 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
- B65D85/00—Containers, packaging elements or packages, specially adapted for particular articles or materials
- B65D85/07—Containers, packaging elements or packages, specially adapted for particular articles or materials for compressible or flexible articles
Abstract
An improved top opening rectan-gular flexible bag (10) for containing stack of highly compressed flexible articles (20). The bag has front and back panels (40,41), two side panels (30 31) and top and bottom panels (50,51), all of which are connected together to form an inter-nal compartment (19) for containing the stack under high compression. The stack is arranged within the bag in such a way that the side panels are under tension. The line of weakness (5) defines the entire top portion of the bag which can be easily re-moved, thus exposing the entire contents of the bag for easy removal. The improve-ment to the bag is that the line of weak-ness is applied to the front and back panel of the bag simultaneously, thus providing perfect alignment of the lines of weakness where they intersect the side seals of the bag. The bag is further improved with a notch (103) where the line of weakness intersects the side seal (102) thus signifi-cantly reducing the force to initiate the tear through the bead of plastic created by the side seal. A further improvement is that the line of weakness is applied in the ma-chine direction as the bag is manufactured, thus requiring a simple, inexpensive. ro-tary cutting tool rather than an expensive, reciprocating die and without negatively impacting line speeds.
Description
~ WO95/21107 21 77674 PCT/US9~/13728 EASY-OPEN FLEXIBLE BAG FOR COMPRESSED ARTICLES
FTF.T n OF TT~F INVF~TION
The present invention rdates to an easy open flexible bag for containing a number of C ~ articles such as dispossble baby diapers, sdult incontinent psds, sanitary nspkins snd the like. The present invention further relates to such ar easy open bag wherein the atticies sre . ~ d in a direction parailel to their ti ickness snd remsin w...~ until activstion of the easy open feature. The present invention further relates to such sn easy open flexible bag, which in use, may have the full smount of the contents removed at a single time.
gA~Xl.RnTJND ART
Relatively soft snd flexible .,v...~ l., srticles such ss disposable diapers, cstsmenisl pads, adult incontinent pads and the like, hsve entered widespread use in many psrts of the world over the last 20-30 years. In the psst, these srticles were typically folded st their n~idpoint, collected in stscks and inserted into paperboard csrtons or flexiole bags or in the case of adult incontinent pads, pscked buik into corrugsted containers. Pads were subject to iittle or no .,u...l,.c..~k... in a direction parslld to their thickness and the dimensions of the cartons, bags or contsiners were generslly determined by the number of atticles contained in the stack or stacks contained within.
The bulk of the relatively low density flexible .,u...~,.~....:~l~, srticles in question has resulted in packages with high volume and low weight. This ~ ' incresses shippu g, storsge and handiing costs for the ~ c~ snd the retsiler, snd detractsfrom the . ._ of storage snd use for thc consumer. In sddition, the relativelylarge volurne of packsging material required for the disposable srticles in sn c ' condition, must be disposed of when the package has been fuily emptied. Moreover, such excess packaging causes an undue amount of waste and is a burden on thc c...;.u----~d.
Recently, in order to reduce package volume and its associated high costs, ~..., hsve begun to package relatively high numbers of disposable srticles WO 95121107 PCT/US9~/13728 under high . , c ,~;u.. in smailer, flexible plastic bags. An example of such a bas is described in U.S. Patent 5,054,619 SIDE OPENING FLE~BLE BAG WITH
LONGlTUDINALLY OR~NTED CARRYING HANDLE SECURED TO SIDE
PANELS, issued to ~ ' " ' on October 8, 1991, which is hereby ;~,u~u~Lcd herein by reference. This reference discloses a side opening top gusset flexible piastic bag containing a stsck of ~,u.~.~...,..~_~i flexible articles. The bsg has top, bottom, front, back and side panels, wherein the side panels are under tension csused by the . ~.. _~i articles contained therein. The bsg hss a continuous Gne of weaicness located st least partiaDy on one of the side panels to defne 8 portion of the side psnel which wiii be partiaiiy remoYed to gain access to the articles. These types of bags typicaDy include 8 puD tab on the side pand for initisting the opening of the bag.
While the bag described in the r ~ patent works quite weii, 8 drawbsck to the generai types of psckages described above is thst the opening festure exposes oniy 8 portion of the psds for dispensing one or two st a time. Additionaily, tbe perforstion or line of weaicness of the opening festure is typicsily spplied in a cross machine direction as the bag is ~ ~ i, thus requiring expensive tooGng and potentiaDy Gmiting production speeds.
Product for a significant portion of the adult incontinent market is sold through hospitais and nursing homes where the entire contents of the paci~age are dispensed ' '~ upon opening the bag. As such, an easy open feature that exposes all pads for remoYai is desirabie.
It is therefore an object of the present invention to provide a top opening feature that is easy to initiate and where the entire top portion of the bag can be easily removed.
It is another object of the invention to apply the Gne of weaicness for the essyopen feature in a direction paraliel to the ~ _ forces of the bag, thus optimizing the iine of weakness without danger of premature opening.
It is another object of the invention to provide the easy open feature such thatthe bag ~ c. can apply it in the machine direction as the bag is msde, thus requiring h~ _ rotary tooGng that will not negatively impact Gne speed.
These and other objects of the present invention will be more readily apparent when considered in reference to the foiiowing description and when taken in with the ~ drawings.
SUM~MRY OF THE rNVF~lTlON
~ wo gS/21107 2 1 7 7 6 7 4 Pcrt~ss~tl3728 In accordance with the present invention there is provided an improved top opening, rectangular flexib~e bag for containing a stack of highiy i~Ulil,~ i 9exible a~ticles. The bag has front and back panels, two side panels and top and bottom paneis, aii of which are connected together to fomm an intemal cu..,,~,.. l..l~..~ for cûntaining the stack under high cu...,~ k,.~. The stack is arranged within the bag in such a way that the side panels are under tension. The line of weakness defines the entire top portion of the bag which car. be easily removed, thus exposing the entire contents of the bag for easy removai. The , u . ~ ...L tû the bag is that the line of weakness is appGed to the front and back panel of the bag ' ~" thus providing perfect aGgnment of the Gnes of weakness where they intersect the side seais of the bag. The bag is further improved with a notch where the line of weakness intersects the side seai, thus _ ' l~, reducing the force to initiate the tear througi.
the bead of plastic created by the side seai. A fiurther advantage of the invention is that the Gne of weakness is applied in the machine direction as the bag in ....~....L.,~u. c i, thus requiring a simple, . ._, rotary cutting tooi rather thar. an expensive, Jl U~ iilK die, and without negatively impacting line speeds.
~RTFF DES~RTPTION OF TRF DRAWINGS
Whiie the ~r "' " concludes with claims particuiarly pointing out and distir.ctiy claiming the present invention, it is believed that the present invention wiii be better under.stood from the foregoing description in , with the P . , _ draw.ings in which:
Flgure I is a simpiified perspective view of a f exible bag in accordance with the present invention.
Figure 2 is a simpGfied ,.,_..~,~__..._ view of a bag of the present invention showing how a consumer would grasp the top seai and bottom gusset to open the bag.
Figure 3 is a view simiiar to that of figure 2 but show.ng the bag after it has been opened.
Figure 4 is a simplified side view of the device used to produce the Gne of we. kness.
Flgure ~ is a simpG.~ied plan view of the bag ' _ process showing where the Gne of weakness is produced and where the notch at the in~rcr i-trinn of the Gr.e of weakness and the side seai is produced.
Figure 6 shows a f.at bag, illustrating the location of the iine of weakness andthe notch.
DET~A~T Fn DESCRIPTION OF TFiE i-N~tENTlON
WO95121107 2 1 77674 PCT/US91J13728 ~
While the present invention will be described in the context of providing an casy open f exible bag containing one or more stacks of folded, adult incontinent pads, the present invention is in no way limited to such application. As pointed out eariier herein, the present invention may be practiced to greatest advantage to provide reduced shipping, storage and handiing costs in any situation involving flexible articles which nre ' "~ y.. ' ' in at least one of their dimensions, such as their thickness. In nddition, the present invention can be used to quickiy dispense the entire contents of such a packnge, as is commoniy done in hospitais and nursing homes. In addition, the present invention can be ~ relative to other types of fiexble bag easy open features. The detaiied description contained herein, which rdates to a particulariy preferred easy open fiexible bag of compressed adult incontinent pads, wiii aiiow one sicilied in the att to readiiy adapt the invention to other uses.
Fiure l is a simplified perspective view of a top seaied, top opening, gusseted, ' "~ rectangular f exible bag 10 in accordance with the present invention Bag 10 contains a number of ~.UI~ L~_d ~iexible articles 20 arranged in a stack. Bag 10 comprises opposing front and back panels 40 and 41, opposing side pands 30 and 31, nnd opposing top and bottom panels 50 and 51. Top panel 50 is fommed nf~ ba8 10 is loaded and seaied. Bottom pand 51 comprises the gusset produced by the bag ^ c. . Aii of the ~ ~ . ' panels are connected together to form an intemai ~ . 19 for containing the stack of compresse~i fiexible articies 20 under high . c The stack of . ~ i articles 20 is placed in bag 10 in such a way that side panels 30 and 3 l are under tension.
Fiexible bag 10 is a gusseted bag fommed by folding a web of fiim, paper, plastic or other suitable materiai. The generai method for fom~ing gusseted, flexible bags from a continuous web of mateliai is weii known in the art. The genersi method for and filiing gusseted, flexible bags simiiar to those of the present invention is gjven in the eariier ,uu..~tc i U.S. patent 5,054,619, S~E OPENING
FI EXiBLE BAG Wll~I LONGlTlJDINALLY OR-iENTED CARRY iNG HANDLE
SECURED TO Sll)E PANELS, issued to r ~ ' '' ' on October 8, 1991.
Thc . u.. to the flexible bag 10 in accordance with the present invention includes the method of loading the flexible articles 20 into the bag 10. The articles 20 are losded open end first rather than folded end first into bag 10. The articles 20 open ends are then in contsct with bottom pand 51 and gusset 4. The llrticles 20 folded ends are in contact with the top panel 50 and sesied end 3. The articles 20 folded ends are thus exposed for easy dispensing from bag 10 after bag 10 is opened, shown in figure 3. Orientation of bag 10 in tbis manner positions the top ~ WO95121107 21 77674 PCTIUS9~/13728 seal 3 and bottom gusset 4 as convenient surfaces to grip while opening bag 10, shown in figure 2 A further . u . _~.. lt to flexible bag 10 is the line of weakness 5 shown in figure 2, which traverses thc entire perimeter of bag 10, and whic4 when activated, aUows removal of the entire top portion 12 of bag 10 In such orientatio4 the line of weakness 5 is not stressed by articles 20 which are under cu~ ., forces which arc paraiid rather than ~ . " ' to line of weakness 5 Line of weakness 5 can then be optimized with a greater ratio of cut (~ ~ ~ to uncut length, thus minimr~ingthe force required to open bag 10 A further . u . to bag 10 results fi-om removing the entire top portion 12 of bag 10, thus exposing the entire contents for removal, shown in Figure 3 ~rticles 20 can then be easily removed in multiples, or bag 10 can be emptied in one motion by inverting bag 10, grasping side panels 30 and 31 and removing the entire bottom portion 14 of bag 10 Flgure 4 is a simplified side view of the rotary cutting tool 54 used to producethe line of weakness 5 shown in figures 2 and 5. In accordance with the present inventio4 perforating against a hardened steel roL 55 wrapped with a soft outer layer 56 facilitates a straight, uniform cut through two thicknesses ofthe flexible bag 10 Flgure 5 is a simpLified plan view of the bag " '1 ~ process The flexible bag 10 is produced by unwinding a roii of fiim 60 over a folding board 70 to form the two sides of bag lû The bottom gusset 4 is formed by the gusset wheel 80 T . U . . to the iine of weakness 5, in accordance with the present invention are as foiiows: The iine of weakness S is produced du ...~tlW.ll from roii unwind 60, folding board 7û and the gusset wheel ~0, and is produced in the front and back panel of bag lû '~, thus eLuninating any li_ of line of weakness S
between front and back panel of bag 10 which could be caused by carrging out those operations separately, and which 'i, could cause increased difliculty in opening the bag 10.
The easy open hole punch lû1 produces notch lû3 where the iine of weakness 5 wiii intersect the side seai 102 of the flat bag. The side seai 102 is preferably formed by seaiing bar 104 aftcr for~nation of the notch lû3. In accordance with the present inventio4 notch 103 " ~,; reduces the force required to initiate the opening feature by eiirninating the need to tear through the bead of piastic formed at the side seai 102 of bag lû.
Figure 6 shows a flat bag lû illustrating the line of weakness 5 and easy open notch lû3.
Wliiie particular ~ L ' of the present invention have been illustrated and described, it would be obvious to those skiiied in the art that various other changes snd 2 1 7 7 6 7 4 PCT/US9~113728 ~
carl be made vithout departing from the spirit and scope of the invention. It is therefore intended to cover in the appended claims all such changes and "' that are vithin the scope of this invention.
FTF.T n OF TT~F INVF~TION
The present invention rdates to an easy open flexible bag for containing a number of C ~ articles such as dispossble baby diapers, sdult incontinent psds, sanitary nspkins snd the like. The present invention further relates to such ar easy open bag wherein the atticies sre . ~ d in a direction parailel to their ti ickness snd remsin w...~ until activstion of the easy open feature. The present invention further relates to such sn easy open flexible bag, which in use, may have the full smount of the contents removed at a single time.
gA~Xl.RnTJND ART
Relatively soft snd flexible .,v...~ l., srticles such ss disposable diapers, cstsmenisl pads, adult incontinent pads and the like, hsve entered widespread use in many psrts of the world over the last 20-30 years. In the psst, these srticles were typically folded st their n~idpoint, collected in stscks and inserted into paperboard csrtons or flexiole bags or in the case of adult incontinent pads, pscked buik into corrugsted containers. Pads were subject to iittle or no .,u...l,.c..~k... in a direction parslld to their thickness and the dimensions of the cartons, bags or contsiners were generslly determined by the number of atticles contained in the stack or stacks contained within.
The bulk of the relatively low density flexible .,u...~,.~....:~l~, srticles in question has resulted in packages with high volume and low weight. This ~ ' incresses shippu g, storsge and handiing costs for the ~ c~ snd the retsiler, snd detractsfrom the . ._ of storage snd use for thc consumer. In sddition, the relativelylarge volurne of packsging material required for the disposable srticles in sn c ' condition, must be disposed of when the package has been fuily emptied. Moreover, such excess packaging causes an undue amount of waste and is a burden on thc c...;.u----~d.
Recently, in order to reduce package volume and its associated high costs, ~..., hsve begun to package relatively high numbers of disposable srticles WO 95121107 PCT/US9~/13728 under high . , c ,~;u.. in smailer, flexible plastic bags. An example of such a bas is described in U.S. Patent 5,054,619 SIDE OPENING FLE~BLE BAG WITH
LONGlTUDINALLY OR~NTED CARRYING HANDLE SECURED TO SIDE
PANELS, issued to ~ ' " ' on October 8, 1991, which is hereby ;~,u~u~Lcd herein by reference. This reference discloses a side opening top gusset flexible piastic bag containing a stsck of ~,u.~.~...,..~_~i flexible articles. The bsg has top, bottom, front, back and side panels, wherein the side panels are under tension csused by the . ~.. _~i articles contained therein. The bsg hss a continuous Gne of weaicness located st least partiaDy on one of the side panels to defne 8 portion of the side psnel which wiii be partiaiiy remoYed to gain access to the articles. These types of bags typicaDy include 8 puD tab on the side pand for initisting the opening of the bag.
While the bag described in the r ~ patent works quite weii, 8 drawbsck to the generai types of psckages described above is thst the opening festure exposes oniy 8 portion of the psds for dispensing one or two st a time. Additionaily, tbe perforstion or line of weaicness of the opening festure is typicsily spplied in a cross machine direction as the bag is ~ ~ i, thus requiring expensive tooGng and potentiaDy Gmiting production speeds.
Product for a significant portion of the adult incontinent market is sold through hospitais and nursing homes where the entire contents of the paci~age are dispensed ' '~ upon opening the bag. As such, an easy open feature that exposes all pads for remoYai is desirabie.
It is therefore an object of the present invention to provide a top opening feature that is easy to initiate and where the entire top portion of the bag can be easily removed.
It is another object of the invention to apply the Gne of weaicness for the essyopen feature in a direction paraliel to the ~ _ forces of the bag, thus optimizing the iine of weakness without danger of premature opening.
It is another object of the invention to provide the easy open feature such thatthe bag ~ c. can apply it in the machine direction as the bag is msde, thus requiring h~ _ rotary tooGng that will not negatively impact Gne speed.
These and other objects of the present invention will be more readily apparent when considered in reference to the foiiowing description and when taken in with the ~ drawings.
SUM~MRY OF THE rNVF~lTlON
~ wo gS/21107 2 1 7 7 6 7 4 Pcrt~ss~tl3728 In accordance with the present invention there is provided an improved top opening, rectangular flexib~e bag for containing a stack of highiy i~Ulil,~ i 9exible a~ticles. The bag has front and back panels, two side panels and top and bottom paneis, aii of which are connected together to fomm an intemal cu..,,~,.. l..l~..~ for cûntaining the stack under high cu...,~ k,.~. The stack is arranged within the bag in such a way that the side panels are under tension. The line of weakness defines the entire top portion of the bag which car. be easily removed, thus exposing the entire contents of the bag for easy removai. The , u . ~ ...L tû the bag is that the line of weakness is appGed to the front and back panel of the bag ' ~" thus providing perfect aGgnment of the Gnes of weakness where they intersect the side seais of the bag. The bag is further improved with a notch where the line of weakness intersects the side seai, thus _ ' l~, reducing the force to initiate the tear througi.
the bead of plastic created by the side seai. A fiurther advantage of the invention is that the Gne of weakness is applied in the machine direction as the bag in ....~....L.,~u. c i, thus requiring a simple, . ._, rotary cutting tooi rather thar. an expensive, Jl U~ iilK die, and without negatively impacting line speeds.
~RTFF DES~RTPTION OF TRF DRAWINGS
Whiie the ~r "' " concludes with claims particuiarly pointing out and distir.ctiy claiming the present invention, it is believed that the present invention wiii be better under.stood from the foregoing description in , with the P . , _ draw.ings in which:
Flgure I is a simpiified perspective view of a f exible bag in accordance with the present invention.
Figure 2 is a simpGfied ,.,_..~,~__..._ view of a bag of the present invention showing how a consumer would grasp the top seai and bottom gusset to open the bag.
Figure 3 is a view simiiar to that of figure 2 but show.ng the bag after it has been opened.
Figure 4 is a simplified side view of the device used to produce the Gne of we. kness.
Flgure ~ is a simpG.~ied plan view of the bag ' _ process showing where the Gne of weakness is produced and where the notch at the in~rcr i-trinn of the Gr.e of weakness and the side seai is produced.
Figure 6 shows a f.at bag, illustrating the location of the iine of weakness andthe notch.
DET~A~T Fn DESCRIPTION OF TFiE i-N~tENTlON
WO95121107 2 1 77674 PCT/US91J13728 ~
While the present invention will be described in the context of providing an casy open f exible bag containing one or more stacks of folded, adult incontinent pads, the present invention is in no way limited to such application. As pointed out eariier herein, the present invention may be practiced to greatest advantage to provide reduced shipping, storage and handiing costs in any situation involving flexible articles which nre ' "~ y.. ' ' in at least one of their dimensions, such as their thickness. In nddition, the present invention can be used to quickiy dispense the entire contents of such a packnge, as is commoniy done in hospitais and nursing homes. In addition, the present invention can be ~ relative to other types of fiexble bag easy open features. The detaiied description contained herein, which rdates to a particulariy preferred easy open fiexible bag of compressed adult incontinent pads, wiii aiiow one sicilied in the att to readiiy adapt the invention to other uses.
Fiure l is a simplified perspective view of a top seaied, top opening, gusseted, ' "~ rectangular f exible bag 10 in accordance with the present invention Bag 10 contains a number of ~.UI~ L~_d ~iexible articles 20 arranged in a stack. Bag 10 comprises opposing front and back panels 40 and 41, opposing side pands 30 and 31, nnd opposing top and bottom panels 50 and 51. Top panel 50 is fommed nf~ ba8 10 is loaded and seaied. Bottom pand 51 comprises the gusset produced by the bag ^ c. . Aii of the ~ ~ . ' panels are connected together to form an intemai ~ . 19 for containing the stack of compresse~i fiexible articies 20 under high . c The stack of . ~ i articles 20 is placed in bag 10 in such a way that side panels 30 and 3 l are under tension.
Fiexible bag 10 is a gusseted bag fommed by folding a web of fiim, paper, plastic or other suitable materiai. The generai method for fom~ing gusseted, flexible bags from a continuous web of mateliai is weii known in the art. The genersi method for and filiing gusseted, flexible bags simiiar to those of the present invention is gjven in the eariier ,uu..~tc i U.S. patent 5,054,619, S~E OPENING
FI EXiBLE BAG Wll~I LONGlTlJDINALLY OR-iENTED CARRY iNG HANDLE
SECURED TO Sll)E PANELS, issued to r ~ ' '' ' on October 8, 1991.
Thc . u.. to the flexible bag 10 in accordance with the present invention includes the method of loading the flexible articles 20 into the bag 10. The articles 20 are losded open end first rather than folded end first into bag 10. The articles 20 open ends are then in contsct with bottom pand 51 and gusset 4. The llrticles 20 folded ends are in contact with the top panel 50 and sesied end 3. The articles 20 folded ends are thus exposed for easy dispensing from bag 10 after bag 10 is opened, shown in figure 3. Orientation of bag 10 in tbis manner positions the top ~ WO95121107 21 77674 PCTIUS9~/13728 seal 3 and bottom gusset 4 as convenient surfaces to grip while opening bag 10, shown in figure 2 A further . u . _~.. lt to flexible bag 10 is the line of weakness 5 shown in figure 2, which traverses thc entire perimeter of bag 10, and whic4 when activated, aUows removal of the entire top portion 12 of bag 10 In such orientatio4 the line of weakness 5 is not stressed by articles 20 which are under cu~ ., forces which arc paraiid rather than ~ . " ' to line of weakness 5 Line of weakness 5 can then be optimized with a greater ratio of cut (~ ~ ~ to uncut length, thus minimr~ingthe force required to open bag 10 A further . u . to bag 10 results fi-om removing the entire top portion 12 of bag 10, thus exposing the entire contents for removal, shown in Figure 3 ~rticles 20 can then be easily removed in multiples, or bag 10 can be emptied in one motion by inverting bag 10, grasping side panels 30 and 31 and removing the entire bottom portion 14 of bag 10 Flgure 4 is a simplified side view of the rotary cutting tool 54 used to producethe line of weakness 5 shown in figures 2 and 5. In accordance with the present inventio4 perforating against a hardened steel roL 55 wrapped with a soft outer layer 56 facilitates a straight, uniform cut through two thicknesses ofthe flexible bag 10 Flgure 5 is a simpLified plan view of the bag " '1 ~ process The flexible bag 10 is produced by unwinding a roii of fiim 60 over a folding board 70 to form the two sides of bag lû The bottom gusset 4 is formed by the gusset wheel 80 T . U . . to the iine of weakness 5, in accordance with the present invention are as foiiows: The iine of weakness S is produced du ...~tlW.ll from roii unwind 60, folding board 7û and the gusset wheel ~0, and is produced in the front and back panel of bag lû '~, thus eLuninating any li_ of line of weakness S
between front and back panel of bag 10 which could be caused by carrging out those operations separately, and which 'i, could cause increased difliculty in opening the bag 10.
The easy open hole punch lû1 produces notch lû3 where the iine of weakness 5 wiii intersect the side seai 102 of the flat bag. The side seai 102 is preferably formed by seaiing bar 104 aftcr for~nation of the notch lû3. In accordance with the present inventio4 notch 103 " ~,; reduces the force required to initiate the opening feature by eiirninating the need to tear through the bead of piastic formed at the side seai 102 of bag lû.
Figure 6 shows a flat bag lû illustrating the line of weakness 5 and easy open notch lû3.
Wliiie particular ~ L ' of the present invention have been illustrated and described, it would be obvious to those skiiied in the art that various other changes snd 2 1 7 7 6 7 4 PCT/US9~113728 ~
carl be made vithout departing from the spirit and scope of the invention. It is therefore intended to cover in the appended claims all such changes and "' that are vithin the scope of this invention.
Claims (4)
1. An easy open substantially rectangular flexible bag of compressed flexible articles, said flexible articles being arranged in a stack and held in compression in a direction substantially parallel to their thickness, said bag of articles comprising:
(a) a top half, a bottom half, a front and a back panel connected to one anotherby means of a pair of side panels, said side panels being joined together with a side seal, a bottom panel and a top panel, all of said panels being comprised of flexible material, said front, back, and side panels forming the sides of said bag, wherein said sides define a perimeter of said bag;
(b) a stack of compressed flexible articles, each of said articles having a pair of opposed, substantially planar surfaces, said articles being oriented so that said substantially planar surfaces are aligned substantially parallel to the side panels of said bag, said side panels and said front and back panels being subject to tension imposed by said stack of compressed flexible articles, said top and bottom panels being in a untensioned condition; and (c) an easy open device comprising a substantially continuous line of weakness located around the perimeter of said bag in the top half of said bag and a pair of notches in said side seals to facilitate the opening of said bag at said sideseals, said substantially continuous line of weakness defining a predetermined portion of said top half of said bag to be at least partially separated from the remainder of said bag without releasing the tension in the remainder of said bag, whereby said predetermined portion of said top half is at least partially separated from the remainder of said bag by applying a grasping force to said predetermined portion of said bag to propagate tears along said line of weakness, whereupon the top portion of the stack of articles is exposed for easy dispensing while the bottom portion of said stack coinciding with the remaining tensioned portion of said bag is retained in a substantially compressed condition.
(a) a top half, a bottom half, a front and a back panel connected to one anotherby means of a pair of side panels, said side panels being joined together with a side seal, a bottom panel and a top panel, all of said panels being comprised of flexible material, said front, back, and side panels forming the sides of said bag, wherein said sides define a perimeter of said bag;
(b) a stack of compressed flexible articles, each of said articles having a pair of opposed, substantially planar surfaces, said articles being oriented so that said substantially planar surfaces are aligned substantially parallel to the side panels of said bag, said side panels and said front and back panels being subject to tension imposed by said stack of compressed flexible articles, said top and bottom panels being in a untensioned condition; and (c) an easy open device comprising a substantially continuous line of weakness located around the perimeter of said bag in the top half of said bag and a pair of notches in said side seals to facilitate the opening of said bag at said sideseals, said substantially continuous line of weakness defining a predetermined portion of said top half of said bag to be at least partially separated from the remainder of said bag without releasing the tension in the remainder of said bag, whereby said predetermined portion of said top half is at least partially separated from the remainder of said bag by applying a grasping force to said predetermined portion of said bag to propagate tears along said line of weakness, whereupon the top portion of the stack of articles is exposed for easy dispensing while the bottom portion of said stack coinciding with the remaining tensioned portion of said bag is retained in a substantially compressed condition.
2. A method for producing an easy open substantially rectangular flexible bag for compressed flexible articles, said method comprising:
a) providing a roll of flexible, thermoplastic material;
b) unwinding said roll to provide a web of material;
c) folding said web of material such that a fold line divides said web into first and second sides;
d) forming a gusset in said folded web adjacent said fold line;
e) essentially simultaneously providing a line of weakness in both of said sides wherein said line of weakness in said first side substantially overlies said line of weakness in said second side;
f) removing a portion of said flexible thermoplastic material on a portion said line of weakness from both said first and second sides to form an aperture in each side wherein said aperture in said first side substantially overlies said aperature in said second side;
g) melting said thermoplastic material under pressure to seal said sides with a heat seal, wherein said heat seal is centered on and overllies only a part of said aperature;
h) cutting said web of material perpendicular to said fold line and within said seal such that said aperature and said seal are divided into two parts.
a) providing a roll of flexible, thermoplastic material;
b) unwinding said roll to provide a web of material;
c) folding said web of material such that a fold line divides said web into first and second sides;
d) forming a gusset in said folded web adjacent said fold line;
e) essentially simultaneously providing a line of weakness in both of said sides wherein said line of weakness in said first side substantially overlies said line of weakness in said second side;
f) removing a portion of said flexible thermoplastic material on a portion said line of weakness from both said first and second sides to form an aperture in each side wherein said aperture in said first side substantially overlies said aperature in said second side;
g) melting said thermoplastic material under pressure to seal said sides with a heat seal, wherein said heat seal is centered on and overllies only a part of said aperature;
h) cutting said web of material perpendicular to said fold line and within said seal such that said aperature and said seal are divided into two parts.
3. The method of Claim 2 wherein said line of weakness is formed in step (e) by a rotary cutting tool.
4. The method of Claim 2 wherein steps (g) and (h) are performed essentially simultaneously.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/191,238 US5380094A (en) | 1994-02-03 | 1994-02-03 | Easy open feature for polymeric package with contents under high compression |
| US08/191,238 | 1994-02-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2177674A1 true CA2177674A1 (en) | 1995-08-10 |
Family
ID=22704673
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002177674A Abandoned CA2177674A1 (en) | 1994-02-03 | 1994-11-30 | Easy-open flexible bag for compressed articles |
Country Status (11)
| Country | Link |
|---|---|
| US (2) | US5380094A (en) |
| EP (1) | EP0741659B1 (en) |
| JP (1) | JP3539965B2 (en) |
| KR (1) | KR100324466B1 (en) |
| AT (1) | ATE165302T1 (en) |
| AU (1) | AU1262695A (en) |
| CA (1) | CA2177674A1 (en) |
| DE (1) | DE69409836T2 (en) |
| DK (1) | DK0741659T3 (en) |
| ES (1) | ES2115353T3 (en) |
| WO (1) | WO1995021107A1 (en) |
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1994
- 1994-02-03 US US08/191,238 patent/US5380094A/en not_active Expired - Lifetime
- 1994-09-16 US US08/307,976 patent/US5514067A/en not_active Expired - Lifetime
- 1994-11-30 ES ES95903638T patent/ES2115353T3/en not_active Expired - Lifetime
- 1994-11-30 AU AU12626/95A patent/AU1262695A/en not_active Abandoned
- 1994-11-30 JP JP52059595A patent/JP3539965B2/en not_active Expired - Fee Related
- 1994-11-30 WO PCT/US1994/013728 patent/WO1995021107A1/en active IP Right Grant
- 1994-11-30 DK DK95903638T patent/DK0741659T3/en active
- 1994-11-30 AT AT95903638T patent/ATE165302T1/en not_active IP Right Cessation
- 1994-11-30 DE DE69409836T patent/DE69409836T2/en not_active Expired - Lifetime
- 1994-11-30 EP EP95903638A patent/EP0741659B1/en not_active Expired - Lifetime
- 1994-11-30 CA CA002177674A patent/CA2177674A1/en not_active Abandoned
- 1994-11-30 KR KR1019960702877A patent/KR100324466B1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| KR960706441A (en) | 1996-12-09 |
| JP3539965B2 (en) | 2004-07-07 |
| US5514067A (en) | 1996-05-07 |
| EP0741659B1 (en) | 1998-04-22 |
| EP0741659A1 (en) | 1996-11-13 |
| DK0741659T3 (en) | 1998-10-07 |
| KR100324466B1 (en) | 2002-08-08 |
| US5380094A (en) | 1995-01-10 |
| DE69409836D1 (en) | 1998-05-28 |
| WO1995021107A1 (en) | 1995-08-10 |
| AU1262695A (en) | 1995-08-21 |
| ATE165302T1 (en) | 1998-05-15 |
| JPH09508341A (en) | 1997-08-26 |
| DE69409836T2 (en) | 1998-09-24 |
| ES2115353T3 (en) | 1998-06-16 |
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| WO2001007336A1 (en) | Flexible bag having a tear-off band for easy opening | |
| JPH0532253A (en) | Easily disposable paper container | |
| JP3908044B2 (en) | Bag mouth folding device in packaging machine | |
| JP2002019797A (en) | Flat bag formed of plastic film | |
| JPH0676070U (en) | Easy-open continuous packaging bag |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Discontinued | ||
| FZDE | Discontinued |
Effective date: 20020527 |