CA1271455A - Reclosable package with peelable seal - Google Patents
Reclosable package with peelable sealInfo
- Publication number
- CA1271455A CA1271455A CA000532595A CA532595A CA1271455A CA 1271455 A CA1271455 A CA 1271455A CA 000532595 A CA000532595 A CA 000532595A CA 532595 A CA532595 A CA 532595A CA 1271455 A CA1271455 A CA 1271455A
- Authority
- CA
- Canada
- Prior art keywords
- bag
- box
- liner
- reclosable fastener
- reclosable
- 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.)
- Expired - Fee Related
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
- B65D33/00—Details of, or accessories for, sacks or bags
- B65D33/16—End- or aperture-closing arrangements or devices
-
- 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
- B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
- B65D77/04—Articles or materials enclosed in two or more containers disposed one within another
- B65D77/06—Liquids or semi-liquids or other materials or articles enclosed in flexible containers disposed within rigid containers
- B65D77/062—Flexible containers disposed within polygonal containers formed by folding a carton blank
-
- 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
- B65D33/18—End- or aperture-closing arrangements or devices using adhesive applied to integral parts, e.g. to flaps
-
- 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
-
- 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
- B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
- B65D77/04—Articles or materials enclosed in two or more containers disposed one within another
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Packages (AREA)
- Bag Frames (AREA)
- Cartons (AREA)
Abstract
Abstract A bag or box liner having a reclosable fastener across its opening, and a peel seal across the opening and located below the reclosable fastener.
Description
~7~
RECLOSABLE PACKAGE WITH PEELABLE SEAL
This present invention generally residei~i in a package comprising a bag which is ui~eable as a liner in a box or which i5 u~ieab}e as a bag itself, which liner ar bag is provided with a protecting peelable seal as well a~ a recloisable fastener. More particularly, it has been discovered that it is more efficient and desirable to form the peelable seal below the reclosable faistener rather than above it, particularly when the package compriseis a bag or liner within a box.
The packa~e of the invention provide~ superior security against the atmosphere and contaminantis and preiserveis product quality, yet remains reclo~able after initial opening and does so without the necessity of using exoess amounts of material in forming the bag or liner 90 as to re~ult in cost savings as well as convenience to the ultimate consumer.
There has been a long felt need for a package for food produots such a~ cereal~, crackers, and the like in which the productis are secured against ~ 34,415--F
: -' :' ' ~ .
. ' , ' ', .
, contamination, moisture, and the atmosphere, and ln which the packag^e is readily openable and reclosable so that when the package is opened and only a portion of the contents i9 removed the remainder of the content can be conveniently saved in a sealed condition for future use. Most o~ such packages presently comprise a box with a bag type liner having only a peel type seal at the top. Once the peel seal is opened or the bag otherwi~e punctured to gain acce~s to the contents it is next to impossible to reseal the bag effectively.
Most users will either roll-up the bag to close the open top partially or simply crumple the open top portion of the bag back into the box and close a loosely interlocking flap at the top of the box.
Neither of the~e procedures are particularly effective to sealing the contents to the atmosphere or contaminants.
Bags with zipper-like closures which are reclosable are well known. Japanese Utility Model Publication 57 (1982) - 105248 however discloses a bag having a peelable seal located above a reclosable fastener so as to lend air tightness to the bag at least until the peelable seal is broken. Thereafter the lower reclosable fa~tener is used to prevent accidental spilling of the content~ from the bag and preservation of the quality, i.e. freshne~, of the content. It is also a purpose of locating the peel 3 seal above the reclosable fastener such that the peel seal acts as a safety clo9ure in the event the reclo~able fa~tener opens accidentally during packaging, transportation, or subqequent handling before or when it reaches the ultimate consumer.
34,415-F -2-.:
.
--3~
E~owever, it has now been discovered that in an arrangement in which the peel seal is located above the reclo~able fastener an excesqive amount of materLal is required above the reclosable fastenerj which is particu~arly disadvantageous when a bag with such an arrangement is to serve a a liner in a box as is common in the art of packaging food products such as for example, cereals, crackers or chipq. Since the reclosable fastener is located below the peelable seal, the reclosable fastener must be located much further down into the box, thus reducing the content which can be contained in a particular ~ize box. On the other hand, if the reclosable fastener is located further up in the box, an excessive amount of material must be provided to extend above the top of the box when the box is opened. This, in turn, requires that the excess amount of material must be forced back into the box in order to clo~e the box lid. Such excess amount of material iY economically undesirable even where the bag is the sole container for the product and is not placed in a separate box. It is also easier to open and reclose the reclosable fastener element when it is not located so far down in the box. It is therefor evident that it is more advantageou~ to have lesq bag material above the reclosable fa~tener than below it.
The present invention resides in a plastic bag or liner comprising oppo~ed ~ide walls, a closed bottom 3 and an openable top comprised of gripping flanges, a reclosable ~astener on the in~ide surfaces of said gripping flanges adjacent the openable end of the bag - or liner, a peel seal located across the openable top and adjacent the reclosable fastener on the side thereo~ towards the interior of the bag or liner, said 34,415-F -3-12~S
reclosable fastener being positioned 50 as to close the end of the container above the product contained therein once the peel seal i9 opened.
Figure 1 is an elevational view of a reclos-able pla~tic bag or liner formed in accordance with the principles of the present invention;
Figure 2 is an enlarged partial cross-sectional view of the bag or liner of Figure 1 taken along reference line 2-2 showing a reclosable fastener and a peel seal arranged in accordance with the principles of the pre~ent invention;
Figure 3 is a cross-sectional view through a bag or liner positioned in a box having a reclosable fastener without a peel seal;
Figure 4 is a similar cross-sectional view of a bag or liner positioned in a box, a peel seal extends across the opening of the bag or liner above the reclosable fastener; and Figure 5 is a cross-sectional view of a bag or liner having a peel seal located below the reclosable fastener in accordance with the prlnciples of the present invention.
Refarring more particularly to Figure 1, the bag or liner 10 i~ preferably formed of a mono-layer or multi-layer thermoplastic material having inner surfaces which are heat sealable so that the sides 12 and 14 thereof can be heat sealed about their edges 14 and 18 to form a bag enclosure. The material is preferably folded to form the bottom 16 of bag 10, but could be heat sealed as well. It is also possible to 34,415-F -4-include ~aterials other than thermoplastic materials in various layers of a multi-layer bag, such as a metal-lic layer for static dissipation, or moisture and vapor penetratlon prevention. The inner sur~ace or layer to be sealed can be an ethylene homopolymer or copolymer or blends thereof, for example, or can be formed of other heat sealable resins or coatings. A multi-layer bag can also include polymeric material layers which substantially prohibit penetration by either gases or liquids or both, such as materials commonly known as polyethylene terephthalate, nylons, Saran~ (vinylidene chloride copolymer) resins, ethylene vinyl alcohol resins, polyolefins, including polypropylene and various densities of polyethylene and including linear low density polyethyleneq.
Adhe~ive coatings can be included to form the actual heat seals and peel seal as generally described above. Adhesive polymeric blends such as ethylene vinyl acetate (EVA) copolymer can be used to coat the inqide or form the inside layer of the bag or liners.
Other well known adhesive polymeric materials can be uqed instead, such as Surlyn~ a sodium comonomer resin made b~J the duPont Co. Primacor~ resins made by The Dow Chemical Company, including ethylene acrylic acid (EEA) copolymer resins. A typioal multi-layer bag can include, for example, an exterior layer oP a high density polyethylene (HDPE) next to which i~ an EVA
3 copolymer re~in, then a third layer including, for example, either a Saran~ resin made by the Dow Chemical Company or an ethylene vinyl alcohol resin, with minor additives, and an inside layer of an EVA resin for forming side seals 14 and 18 and the peel seal 20 shown in Figures l and 2. The third layer would act as an 34,415-F -5-effecti~e barrier to gases for normal food applications. However, such a ga~ barrier would not be required in many instances.
Above the peel seal 20 is located a con~en-tional reclosable fastener 21 such as that illustrated in Briti~h Patent No. 3,133,462 having a male fastener element 22 with ribs 24 on either side thereof and a female fastener element 26 engaged therewith as shown in Figure 2. The opening end of the bag includes gripping flanges 28 which are used to separate the reclosable fasteners as well as to pull apart the peel seal 20 located at the neck down portions 30 and 32 on sides 12 and 14 respectively of bag 10.
Where high gas barrier protection is not a critical Pactor, as is true in over 50 percent of package~ used for cereal~, for example, such products could be packaged by using for the bag or liner of this ~ invention, an HDPE film which is coated on the in~ide with an EVA composition having a vinyl acetate content of about 28 percent blended, for example, with an LDPE, a Surlyn0 resin, and various concentrates wherein the EVA copolymer percentage of the compositlon would be about 48 weight percent, the LDPE composition would be 25 weight percent, and the Surlyn0 composition would be about 15 weight percent of the total composition. The peel ~eal i~ made by regulating the temperature and pres3ure~ ~o that it is le~s than that needed to form the peripheral margin~ 14 and 18 oE the bag 10, for example, where a complete, strong bonding seal ~ust be made. For example, the pre~3ure and duration Yor the surrounding ~eals of edge~ 14 and 18 could be at 115C
for a period of about 0.8 ~econds where the seal pre~sure to form the peel seal 20 would be at 99C for a 34,415-E ~6-~ .
.
~L27~55 period of about 0~3 seconds with the coating de~cribed above.
Figures 3 to 5 illustrate the significant advantages of placing the peel seal in the arrangement disclosed by this invention over box liners or bags having no peel seal or with a peel seal located above the reclosable fastener. Bags or liners without are closable fastener, say with only a peel seal, are not compared directly here in detail because they a basically not reclosable and have apparent dis advantages as compared with reclosable bags or liners.
Figure 3 illustrates in cross-section a carton 34 in which is placed a bag 10' containing a product 36. The carton has an upper end or top 38 over which is folded closure top flaps 40 which form a temporary enclosure for the box when it is full. The dimension Y
represents the height of oarton 34. The dimension P
represents the height of the product contained within bag 10'. The dimension H represents the distance from the top 38 of the box to the reclosable fastener 21, and the dimension L represents the lip height (length) above the reclosable fastener 21 of the bag or liner.
In Figure 4, the dimension~ are ba~ically the same, except here a peel seal i9 located above the reclosable fastener 21 of liner 10", S repre3ent3 the length o~ a peel seal 20 above the re¢losable fastener, and L
represents the length of the bag lip~ or gripping 3 flanges above the peel seal.
Figure 5 is similar to the other figures, only here the dimension S of liner 10 represents the length of peel seal 20 which i~ located below the reclosable fa~tener 21, and L represents the distance of the lip above the reclosable fastener 21. To determine the 34,415-F -7-, , materials saved over the embodiment of Figure 4 having a peel seal above the reclosable fastener to that of the embodiment of Figure 5, the latter employing a peel seal below the reclosable fastener, the following calculations can be made:
Assuming the reclosable fastener extends above the top of the box by the same amount (H). . . say 2.5 cm, in Figure 3t and using formulas derived for a reclosable fastener box liner in a box with dimensions Z being the box depth; X being the box width; Y being box height, the liner height B is determined by:
B = Z/2 ~ p * ~J(y+l_p)2 ~ (Z/2)2 + L
This formula needs to be modified for the peel seal bag of Figure 5. The height will be ~ of the box depth (Z) ~ the di~tance to the top of the product (P) the diagonal di~tance to the peel seal + peel ~eal (S) + lip length (L).
B = Z/2 + P + ~/(Y+l-P-S)2 + (Z/2)2 + S + L
The formula to determine liner height for the peel qeal above the reclosable fastener (Figure 4) will be ~ of the box depth (Z) + the di~tance to the top of the product (P) ~ the diagonal di~tance to the reclo~-able fa~tener + the peel ~eal (S) ~ lip length (L).
34,415-F -8-;
:
.' .
~2~
g B Z/2 ~ p ~ ~/(y~1_p)2 + (Z/2)2 ~ S ~ L
From several exampleq, it was determined that over 5 percent more material is required for a box liner with a peel seal located above rather than below the reclosable fastener. A 5 percent material savings can amount to a signi~icant savingq when one considers the many millions of box liners that are commercially made, used and sold annually.
As pointed out above, considerable material savings can be expected by placing the peel seal below the reclo~able fastener rather than above. It has also been found in market tests that there is a considerable degree of preference by the consumer for having a shorter entrance path to the package and generally ~or having the peel ~eal below the reclosable fastener, because the bag liner feels familiar like those not having a reclo~able fastener, i.e. where one opens a peel seal which is directly above the product and there i9 no reclosable fastener. Once the peel seal is opened up, the distance from the top of the box to the reclosable fastener increases slightly. Thiq is an advantage to operating the reclosable fasteners a~
described previou~ly.
If the reclosable fastener is some fixed 3 di9tance above the box, it i9 evident in viewing this invention that locating the peel seal below the fastener require~ less material in the bag than locating it above the fastener.
Put another way, the reclosable fastener will be higher out of the box where a peel seal is located 34,415-F _g_ . . .
... . .
, . .
.
, s below the reclosable fastener than where the peel seal is located above the reclosable ~astener for any given amount of material, 90 that if one were to use the same amount of material it would be much ea~ier to gain acces to the contents where the peel seal is located below the reclosable fastener.
A majority of people in a customer study indicated that they pre~erred the peel seal below the reolosable ~astener as compared to the peel seal above the reclosable fastener because the closure can be opened and closed more easily, the contents poured easier, there was less package above the reclosable fastener, there was less bag and it was not as bulky, it gave the desirable appearance of shorter lips, requires less dexterity to open and ~lose, and gener~
ally is preferable.
While certain representative embodiments and details have been shown for the purpose of illustrating the invention, it will be apparent to those skilled in the art that various changes in applications can be made therein without departing from the ~pirit and scope of the invention. For example, various polymeric resin~ can be used, either thermoplastic or otherwise, and metallized layers can be used in the structure of the bag itself, reclosable fasteners can be applied in various ways well known in the prior art, and can take various forms and/or other type9 of fasteners than those described herein can be employed and the configuration o~ the peel seal can be varied all within the scope o~ the present invention.
34,415-F -10-
RECLOSABLE PACKAGE WITH PEELABLE SEAL
This present invention generally residei~i in a package comprising a bag which is ui~eable as a liner in a box or which i5 u~ieab}e as a bag itself, which liner ar bag is provided with a protecting peelable seal as well a~ a recloisable fastener. More particularly, it has been discovered that it is more efficient and desirable to form the peelable seal below the reclosable faistener rather than above it, particularly when the package compriseis a bag or liner within a box.
The packa~e of the invention provide~ superior security against the atmosphere and contaminantis and preiserveis product quality, yet remains reclo~able after initial opening and does so without the necessity of using exoess amounts of material in forming the bag or liner 90 as to re~ult in cost savings as well as convenience to the ultimate consumer.
There has been a long felt need for a package for food produots such a~ cereal~, crackers, and the like in which the productis are secured against ~ 34,415--F
: -' :' ' ~ .
. ' , ' ', .
, contamination, moisture, and the atmosphere, and ln which the packag^e is readily openable and reclosable so that when the package is opened and only a portion of the contents i9 removed the remainder of the content can be conveniently saved in a sealed condition for future use. Most o~ such packages presently comprise a box with a bag type liner having only a peel type seal at the top. Once the peel seal is opened or the bag otherwi~e punctured to gain acce~s to the contents it is next to impossible to reseal the bag effectively.
Most users will either roll-up the bag to close the open top partially or simply crumple the open top portion of the bag back into the box and close a loosely interlocking flap at the top of the box.
Neither of the~e procedures are particularly effective to sealing the contents to the atmosphere or contaminants.
Bags with zipper-like closures which are reclosable are well known. Japanese Utility Model Publication 57 (1982) - 105248 however discloses a bag having a peelable seal located above a reclosable fastener so as to lend air tightness to the bag at least until the peelable seal is broken. Thereafter the lower reclosable fa~tener is used to prevent accidental spilling of the content~ from the bag and preservation of the quality, i.e. freshne~, of the content. It is also a purpose of locating the peel 3 seal above the reclosable fastener such that the peel seal acts as a safety clo9ure in the event the reclo~able fa~tener opens accidentally during packaging, transportation, or subqequent handling before or when it reaches the ultimate consumer.
34,415-F -2-.:
.
--3~
E~owever, it has now been discovered that in an arrangement in which the peel seal is located above the reclo~able fastener an excesqive amount of materLal is required above the reclosable fastenerj which is particu~arly disadvantageous when a bag with such an arrangement is to serve a a liner in a box as is common in the art of packaging food products such as for example, cereals, crackers or chipq. Since the reclosable fastener is located below the peelable seal, the reclosable fastener must be located much further down into the box, thus reducing the content which can be contained in a particular ~ize box. On the other hand, if the reclosable fastener is located further up in the box, an excessive amount of material must be provided to extend above the top of the box when the box is opened. This, in turn, requires that the excess amount of material must be forced back into the box in order to clo~e the box lid. Such excess amount of material iY economically undesirable even where the bag is the sole container for the product and is not placed in a separate box. It is also easier to open and reclose the reclosable fastener element when it is not located so far down in the box. It is therefor evident that it is more advantageou~ to have lesq bag material above the reclosable fa~tener than below it.
The present invention resides in a plastic bag or liner comprising oppo~ed ~ide walls, a closed bottom 3 and an openable top comprised of gripping flanges, a reclosable ~astener on the in~ide surfaces of said gripping flanges adjacent the openable end of the bag - or liner, a peel seal located across the openable top and adjacent the reclosable fastener on the side thereo~ towards the interior of the bag or liner, said 34,415-F -3-12~S
reclosable fastener being positioned 50 as to close the end of the container above the product contained therein once the peel seal i9 opened.
Figure 1 is an elevational view of a reclos-able pla~tic bag or liner formed in accordance with the principles of the present invention;
Figure 2 is an enlarged partial cross-sectional view of the bag or liner of Figure 1 taken along reference line 2-2 showing a reclosable fastener and a peel seal arranged in accordance with the principles of the pre~ent invention;
Figure 3 is a cross-sectional view through a bag or liner positioned in a box having a reclosable fastener without a peel seal;
Figure 4 is a similar cross-sectional view of a bag or liner positioned in a box, a peel seal extends across the opening of the bag or liner above the reclosable fastener; and Figure 5 is a cross-sectional view of a bag or liner having a peel seal located below the reclosable fastener in accordance with the prlnciples of the present invention.
Refarring more particularly to Figure 1, the bag or liner 10 i~ preferably formed of a mono-layer or multi-layer thermoplastic material having inner surfaces which are heat sealable so that the sides 12 and 14 thereof can be heat sealed about their edges 14 and 18 to form a bag enclosure. The material is preferably folded to form the bottom 16 of bag 10, but could be heat sealed as well. It is also possible to 34,415-F -4-include ~aterials other than thermoplastic materials in various layers of a multi-layer bag, such as a metal-lic layer for static dissipation, or moisture and vapor penetratlon prevention. The inner sur~ace or layer to be sealed can be an ethylene homopolymer or copolymer or blends thereof, for example, or can be formed of other heat sealable resins or coatings. A multi-layer bag can also include polymeric material layers which substantially prohibit penetration by either gases or liquids or both, such as materials commonly known as polyethylene terephthalate, nylons, Saran~ (vinylidene chloride copolymer) resins, ethylene vinyl alcohol resins, polyolefins, including polypropylene and various densities of polyethylene and including linear low density polyethyleneq.
Adhe~ive coatings can be included to form the actual heat seals and peel seal as generally described above. Adhesive polymeric blends such as ethylene vinyl acetate (EVA) copolymer can be used to coat the inqide or form the inside layer of the bag or liners.
Other well known adhesive polymeric materials can be uqed instead, such as Surlyn~ a sodium comonomer resin made b~J the duPont Co. Primacor~ resins made by The Dow Chemical Company, including ethylene acrylic acid (EEA) copolymer resins. A typioal multi-layer bag can include, for example, an exterior layer oP a high density polyethylene (HDPE) next to which i~ an EVA
3 copolymer re~in, then a third layer including, for example, either a Saran~ resin made by the Dow Chemical Company or an ethylene vinyl alcohol resin, with minor additives, and an inside layer of an EVA resin for forming side seals 14 and 18 and the peel seal 20 shown in Figures l and 2. The third layer would act as an 34,415-F -5-effecti~e barrier to gases for normal food applications. However, such a ga~ barrier would not be required in many instances.
Above the peel seal 20 is located a con~en-tional reclosable fastener 21 such as that illustrated in Briti~h Patent No. 3,133,462 having a male fastener element 22 with ribs 24 on either side thereof and a female fastener element 26 engaged therewith as shown in Figure 2. The opening end of the bag includes gripping flanges 28 which are used to separate the reclosable fasteners as well as to pull apart the peel seal 20 located at the neck down portions 30 and 32 on sides 12 and 14 respectively of bag 10.
Where high gas barrier protection is not a critical Pactor, as is true in over 50 percent of package~ used for cereal~, for example, such products could be packaged by using for the bag or liner of this ~ invention, an HDPE film which is coated on the in~ide with an EVA composition having a vinyl acetate content of about 28 percent blended, for example, with an LDPE, a Surlyn0 resin, and various concentrates wherein the EVA copolymer percentage of the compositlon would be about 48 weight percent, the LDPE composition would be 25 weight percent, and the Surlyn0 composition would be about 15 weight percent of the total composition. The peel ~eal i~ made by regulating the temperature and pres3ure~ ~o that it is le~s than that needed to form the peripheral margin~ 14 and 18 oE the bag 10, for example, where a complete, strong bonding seal ~ust be made. For example, the pre~3ure and duration Yor the surrounding ~eals of edge~ 14 and 18 could be at 115C
for a period of about 0.8 ~econds where the seal pre~sure to form the peel seal 20 would be at 99C for a 34,415-E ~6-~ .
.
~L27~55 period of about 0~3 seconds with the coating de~cribed above.
Figures 3 to 5 illustrate the significant advantages of placing the peel seal in the arrangement disclosed by this invention over box liners or bags having no peel seal or with a peel seal located above the reclosable fastener. Bags or liners without are closable fastener, say with only a peel seal, are not compared directly here in detail because they a basically not reclosable and have apparent dis advantages as compared with reclosable bags or liners.
Figure 3 illustrates in cross-section a carton 34 in which is placed a bag 10' containing a product 36. The carton has an upper end or top 38 over which is folded closure top flaps 40 which form a temporary enclosure for the box when it is full. The dimension Y
represents the height of oarton 34. The dimension P
represents the height of the product contained within bag 10'. The dimension H represents the distance from the top 38 of the box to the reclosable fastener 21, and the dimension L represents the lip height (length) above the reclosable fastener 21 of the bag or liner.
In Figure 4, the dimension~ are ba~ically the same, except here a peel seal i9 located above the reclosable fastener 21 of liner 10", S repre3ent3 the length o~ a peel seal 20 above the re¢losable fastener, and L
represents the length of the bag lip~ or gripping 3 flanges above the peel seal.
Figure 5 is similar to the other figures, only here the dimension S of liner 10 represents the length of peel seal 20 which i~ located below the reclosable fa~tener 21, and L represents the distance of the lip above the reclosable fastener 21. To determine the 34,415-F -7-, , materials saved over the embodiment of Figure 4 having a peel seal above the reclosable fastener to that of the embodiment of Figure 5, the latter employing a peel seal below the reclosable fastener, the following calculations can be made:
Assuming the reclosable fastener extends above the top of the box by the same amount (H). . . say 2.5 cm, in Figure 3t and using formulas derived for a reclosable fastener box liner in a box with dimensions Z being the box depth; X being the box width; Y being box height, the liner height B is determined by:
B = Z/2 ~ p * ~J(y+l_p)2 ~ (Z/2)2 + L
This formula needs to be modified for the peel seal bag of Figure 5. The height will be ~ of the box depth (Z) ~ the di~tance to the top of the product (P) the diagonal di~tance to the peel seal + peel ~eal (S) + lip length (L).
B = Z/2 + P + ~/(Y+l-P-S)2 + (Z/2)2 + S + L
The formula to determine liner height for the peel qeal above the reclosable fastener (Figure 4) will be ~ of the box depth (Z) + the di~tance to the top of the product (P) ~ the diagonal di~tance to the reclo~-able fa~tener + the peel ~eal (S) ~ lip length (L).
34,415-F -8-;
:
.' .
~2~
g B Z/2 ~ p ~ ~/(y~1_p)2 + (Z/2)2 ~ S ~ L
From several exampleq, it was determined that over 5 percent more material is required for a box liner with a peel seal located above rather than below the reclosable fastener. A 5 percent material savings can amount to a signi~icant savingq when one considers the many millions of box liners that are commercially made, used and sold annually.
As pointed out above, considerable material savings can be expected by placing the peel seal below the reclo~able fastener rather than above. It has also been found in market tests that there is a considerable degree of preference by the consumer for having a shorter entrance path to the package and generally ~or having the peel ~eal below the reclosable fastener, because the bag liner feels familiar like those not having a reclo~able fastener, i.e. where one opens a peel seal which is directly above the product and there i9 no reclosable fastener. Once the peel seal is opened up, the distance from the top of the box to the reclosable fastener increases slightly. Thiq is an advantage to operating the reclosable fasteners a~
described previou~ly.
If the reclosable fastener is some fixed 3 di9tance above the box, it i9 evident in viewing this invention that locating the peel seal below the fastener require~ less material in the bag than locating it above the fastener.
Put another way, the reclosable fastener will be higher out of the box where a peel seal is located 34,415-F _g_ . . .
... . .
, . .
.
, s below the reclosable fastener than where the peel seal is located above the reclosable ~astener for any given amount of material, 90 that if one were to use the same amount of material it would be much ea~ier to gain acces to the contents where the peel seal is located below the reclosable fastener.
A majority of people in a customer study indicated that they pre~erred the peel seal below the reolosable ~astener as compared to the peel seal above the reclosable fastener because the closure can be opened and closed more easily, the contents poured easier, there was less package above the reclosable fastener, there was less bag and it was not as bulky, it gave the desirable appearance of shorter lips, requires less dexterity to open and ~lose, and gener~
ally is preferable.
While certain representative embodiments and details have been shown for the purpose of illustrating the invention, it will be apparent to those skilled in the art that various changes in applications can be made therein without departing from the ~pirit and scope of the invention. For example, various polymeric resin~ can be used, either thermoplastic or otherwise, and metallized layers can be used in the structure of the bag itself, reclosable fasteners can be applied in various ways well known in the prior art, and can take various forms and/or other type9 of fasteners than those described herein can be employed and the configuration o~ the peel seal can be varied all within the scope o~ the present invention.
34,415-F -10-
Claims (4)
1. A plastic bag or liner comprising opposed side walls, a closed bottom and an openable top com-prised of gripping flanges, a reclosable fastener on the inside surfaces of said gripping flanges adjacent the openable end of the bag or liner, a peel seal located across the openable top and adjacent the reclosable fastener on the side thereof towards the interior of the bag or liner, said reclosable fastener being positioned so as to close the end of the container above the product contained therein once the peel seal is opened.
2. The bag or liner of Claim 1 contained within a box, wherein said reclosable fastener is designed to extend above an open end of said box when said box is in an open position .
3. The bag or liner of Claim 2 having a product contained therein, the level of the product being below the top of said box, and wherein the peelable seal and the reclosable fastener are positioned above the top of the box when extending out of the open box.
4. The bag or liner of Claim 3 wherein said reclosable fastener positioned is about 2.5 cm above the top of the open box and said peelable seal is less 34,415-F -11-than about 2.5 cm in height in the region between the top of the box and the reclosable fastener.
34,415-F -12-
34,415-F -12-
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US84250386A | 1986-03-21 | 1986-03-21 | |
| US842,503 | 1986-03-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1271455A true CA1271455A (en) | 1990-07-10 |
Family
ID=25287480
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000532595A Expired - Fee Related CA1271455A (en) | 1986-03-21 | 1987-03-20 | Reclosable package with peelable seal |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP0239319B1 (en) |
| JP (1) | JPS62271847A (en) |
| KR (1) | KR910001495B1 (en) |
| AU (1) | AU599361B2 (en) |
| CA (1) | CA1271455A (en) |
| DE (1) | DE3764684D1 (en) |
| WO (1) | WO1987005583A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11377284B2 (en) | 2019-11-13 | 2022-07-05 | General Mills, Inc. | Resealable bag and method of producing the resealable bag |
Families Citing this family (32)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5107658A (en) * | 1986-03-20 | 1992-04-28 | Oscar Mayer Foods Corporation | Method of making a reclosable package |
| US4823961A (en) * | 1986-03-20 | 1989-04-25 | Oscar Mayer Foods Corporation | Reclosable package |
| US5050736A (en) * | 1988-07-12 | 1991-09-24 | Oscar Mayer Foods Corporation | Reclosable package |
| US5014856A (en) * | 1986-03-20 | 1991-05-14 | Oscar Mayer Foods Corporation | Reclosable package |
| US5005707A (en) * | 1986-03-20 | 1991-04-09 | Oscar Mayer Foods Corporation | Reclosable package |
| US4925316A (en) * | 1986-08-11 | 1990-05-15 | Minigrip, Inc. | Reclosable bag having an outer reclosable zipper type closure and inner non-reclosable closure |
| US4944409A (en) | 1988-02-10 | 1990-07-31 | Curwood, Inc. | Easy open package |
| GB2223736A (en) * | 1988-07-19 | 1990-04-18 | Simpla Plastics | Bags |
| US5188461A (en) * | 1988-10-17 | 1993-02-23 | Schurpack, Inc. | Packing, method of manufacturing same, and strip material therefor |
| DK576888D0 (en) * | 1988-10-17 | 1988-10-17 | Schur Int As Brdr | PROCEDURE FOR MANUFACTURING PACKAGING PACKAGES WITH PREVIOUS WELDING CLOSE, SUCH PACKAGING WITH CLOSING PROFILE PARTS, AND SUPPLY MATERIALS FOR USING THIS PREPARATION |
| US4905298A (en) * | 1988-12-12 | 1990-02-27 | Walor Curtis J | Resealable closure |
| US4923309A (en) * | 1989-02-27 | 1990-05-08 | Illinois Tool Works | Tamper-evident package |
| JP2529599B2 (en) * | 1989-03-16 | 1996-08-28 | 出光石油化学株式会社 | Articulator and packaging bag with bite |
| US5238306A (en) * | 1989-05-19 | 1993-08-24 | Reynolds Consumer Products, Inc. | Method of producing a sealing system for a reclosable webbed-wall package, and system made |
| DE3941183A1 (en) * | 1989-12-13 | 1991-06-20 | Multivac Haggenmueller Kg | PACKING MACHINE FOR PRODUCING A RECOVERABLE PACKAGING WITH A PRODUCT |
| US5924795A (en) * | 1991-02-22 | 1999-07-20 | Kraft Foods, Inc. | Tamper-evident, reclosable, flexible packages |
| AU3972297A (en) * | 1996-08-07 | 1998-02-25 | Tenneco Packaging Inc. | Reclosable package with tamper evident feature |
| US5713669A (en) * | 1996-12-05 | 1998-02-03 | Tenneco Packaging | Plastic bag with zipper slider captured in pocket |
| US6286999B1 (en) | 1999-05-11 | 2001-09-11 | Pactiv Corporation | Tamper-evident reclosable bag |
| US6071011A (en) | 1999-08-12 | 2000-06-06 | Tenneco Packaging, Inc. | Fill-through-the-top package |
| US6499878B1 (en) | 1999-12-21 | 2002-12-31 | Pactiv Corporation | Reclosable packages with barrier properties |
| US6611996B2 (en) | 2001-07-02 | 2003-09-02 | Pactiv Corporation | Slider for reclosable fastener |
| US6713152B2 (en) | 2001-09-07 | 2004-03-30 | Pactiv Corporation | Fins and profiles for plastic bags |
| US7159282B2 (en) | 2002-03-01 | 2007-01-09 | Pactiv Corporation | Reclosable fasteners or zippers for use with polymeric bags |
| US7604828B2 (en) | 2005-05-02 | 2009-10-20 | Conagra Foods Rdm, Inc. | Easy-open sausage package |
| JP2008542140A (en) | 2005-06-01 | 2008-11-27 | レイノルズ コンシューマー プロダクツ、インク． | Resealable zipper with sealing material on both inside and outside of sealing member |
| JP2008104542A (en) * | 2006-10-24 | 2008-05-08 | Michimasa Suemitsu | Poultice attachment assisting tool and method for attaching poultice |
| US8087828B2 (en) | 2006-12-08 | 2012-01-03 | Takayuki Noguchi | Synthetic resin bag having an easy opening function |
| US8642144B2 (en) | 2008-05-28 | 2014-02-04 | Bemis Company, Inc. | Innerliner with nylon skin layer |
| JP2012101797A (en) * | 2010-11-05 | 2012-05-31 | C I Kasei Co Ltd | Bag body with fitting device |
| EP2468661A1 (en) * | 2010-12-23 | 2012-06-27 | Amcor Flexibles Kreuzlingen Ltd. | Bag-in-box package |
| WO2016171647A1 (en) | 2015-04-20 | 2016-10-27 | Bemis Company, Inc. | Peelable/resealable package with absorbent strip |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2898027A (en) * | 1956-12-04 | 1959-08-04 | Scholle Chemical Corp | Container for fluent materials |
| FR1494586A (en) * | 1966-09-27 | 1967-09-08 | Flexico France Sarl | Watertight joining device and manufacturing process |
| US3619395A (en) * | 1969-04-17 | 1971-11-09 | Minigrip Inc | Method of making a pilfer proof package |
| US3685562A (en) * | 1971-03-03 | 1972-08-22 | Steven Ausnit | Flexible pilfer proof closure construction for bags |
| US4241865A (en) * | 1979-08-06 | 1980-12-30 | Kcl Corporation | Reclosable shipping sack and method |
| JPS6238920Y2 (en) * | 1980-12-19 | 1987-10-03 | ||
| EP0160619A3 (en) * | 1984-04-30 | 1987-09-02 | SIG Schweizerische Industrie-Gesellschaft | Reclosable package |
| US4637063A (en) * | 1985-03-04 | 1987-01-13 | Kcl Corporation | Reclosable bag with sealed laminated liner and method |
-
1987
- 1987-03-13 AU AU70017/87A patent/AU599361B2/en not_active Ceased
- 1987-03-18 EP EP87302342A patent/EP0239319B1/en not_active Expired - Lifetime
- 1987-03-18 DE DE8787302342T patent/DE3764684D1/en not_active Expired - Fee Related
- 1987-03-20 CA CA000532595A patent/CA1271455A/en not_active Expired - Fee Related
- 1987-03-20 KR KR1019870002539A patent/KR910001495B1/en active IP Right Grant
- 1987-03-20 WO PCT/US1987/000613 patent/WO1987005583A1/en unknown
- 1987-03-20 JP JP62067717A patent/JPS62271847A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11377284B2 (en) | 2019-11-13 | 2022-07-05 | General Mills, Inc. | Resealable bag and method of producing the resealable bag |
Also Published As
| Publication number | Publication date |
|---|---|
| WO1987005583A1 (en) | 1987-09-24 |
| EP0239319A3 (en) | 1988-12-28 |
| DE3764684D1 (en) | 1990-10-11 |
| EP0239319A2 (en) | 1987-09-30 |
| AU599361B2 (en) | 1990-07-19 |
| KR870008758A (en) | 1987-10-20 |
| KR910001495B1 (en) | 1991-03-09 |
| AU7001787A (en) | 1987-09-24 |
| JPS62271847A (en) | 1987-11-26 |
| EP0239319B1 (en) | 1990-09-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |