US20050111765A1 - POM PT one step with a cross directional ripping-strip - Google Patents
POM PT one step with a cross directional ripping-strip Download PDFInfo
- Publication number
- US20050111765A1 US20050111765A1 US10/917,509 US91750904A US2005111765A1 US 20050111765 A1 US20050111765 A1 US 20050111765A1 US 91750904 A US91750904 A US 91750904A US 2005111765 A1 US2005111765 A1 US 2005111765A1
- Authority
- US
- United States
- Prior art keywords
- bag
- wall portion
- upper flap
- ripping
- outer bag
- 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
- 239000000853 adhesive Substances 0.000 claims abstract description 32
- 230000001070 adhesive effect Effects 0.000 claims abstract description 32
- 239000000463 material Substances 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims description 15
- 239000004033 plastic Substances 0.000 claims description 12
- 229920003023 plastic Polymers 0.000 claims description 12
- 238000007789 sealing Methods 0.000 claims description 12
- 239000003292 glue Substances 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 9
- 239000012943 hotmelt Substances 0.000 claims description 6
- 239000002390 adhesive tape Substances 0.000 claims description 5
- 239000004698 Polyethylene Substances 0.000 claims description 3
- -1 polyethylene Polymers 0.000 claims description 3
- 229920000573 polyethylene Polymers 0.000 claims description 3
- 239000000123 paper Substances 0.000 description 30
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000006378 damage Effects 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 208000027418 Wounds and injury Diseases 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 208000014674 injury Diseases 0.000 description 3
- 239000002655 kraft paper Substances 0.000 description 3
- 229920001169 thermoplastic Polymers 0.000 description 3
- 239000004416 thermosoftening plastic Substances 0.000 description 3
- 238000005429 filling process Methods 0.000 description 2
- 229920002994 synthetic fiber Polymers 0.000 description 2
- 208000034809 Product contamination Diseases 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000009958 sewing Methods 0.000 description 1
Images
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
- B65D31/00—Bags or like containers made of paper and having structural provision for thickness of contents
- B65D31/04—Bags or like containers made of paper and having structural provision for thickness of contents with multiple walls
-
- 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
- B65D77/22—Details
- B65D77/30—Opening or contents-removing devices added or incorporated during filling or closing of containers
- B65D77/32—Tearing-strings or like flexible elements
- B65D77/34—Tearing-strings or like flexible elements enclosed in a mouth seal
-
- 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
- B65D2565/00—Wrappers or flexible covers; Packaging materials of special type or form
- B65D2565/38—Packaging materials of special type or form
- B65D2565/381—Details of packaging materials of special type or form
- B65D2565/385—Details of packaging materials of special type or form especially suited for or with means facilitating recycling
Abstract
A bag comprising adhesive material applied on a ply step of the bag, a ripping-strip and a non adhesive coated area embedding the ripping-strip, providing an easy opening feature at the customer open end of the bag. The bottom of the bag comprises a folded flat bottom. The bag preferably holds an inserted inner bag. The bag has a top closure that can be folded above a customer seal in order for the inner bag to be fully independent from the outer bag after the bag is opened with the help of a ripping-strip. Upon closure of the bag, the inner bag is not trapped in an upper flap of the outer bag in order for the bag to be fully recyclable. Preferably, a mid-step is provided with the mid ply of the outer bag. The mid step stiffens and reinforces the flap.
Description
- The present invention relates generally to the field of the paper bag industry and more particularly to the production of a Paste Open Mouth (POM) style bag with a Pinched Top (PT), embracing an inserted inner bag, as well as a method of closing such a bag.
- In the paper bag industry, so far, nobody has been able to provide an easy and secure opening feature in a POM style bag with a pinched top (PT) in a 2 or 3 paper ply bag with a poly inserted inner bag.
- On the known version of POM PT style bags, the bottom is covered with a patch. Customers require a special sealer which cuts the inner bag just above the seal to prevent the inner bag from being caught in the flap at the top closure. The access to the inner bag is thus difficult. Even when an easy opening feature is implemented, the end user usually uses a knife to open the bag, resulting in potential damage to the bag and risk of injury.
- The Sewn Open Mouth (SOM) liner, the most traditional bag, offers easy access to the liner or inner bag. During manufacturing, the liner is manually inserted and sealed. The bag is closed with the help of a sewing thread. The manufacturing process is labour intensive, has a high lead time and creates risk of injury during the manual insertion. The final product has a poor standing-ability, exhibits a high risk of contamination during the filling process and is not compatible with the PT closing equipment.
- The Self-Opening-Style (SOS) liner is very similar to the SOM liner. However, it stands better on a flat surface. It still exhibits similar limitations of the SOM liner.
- The SOS PT bag (or commercially known as a “WEBB bag”) is a very expensive bag and is only offered by a limited amount of suppliers. It has a square bottom and is compatible with the pinch closure equipment on the top. The bag provides a good pallet display, but still has limitations. The inner bag cannot be separated from the paper bag and hence both cannot be recycled. It is also not possible to seal the liner fully hermetically.
- A very popular version in industry is the Pinch Bottom Open Mouth (PBOM) bag. Its top closure is pinch type and is therefor adapted to the same closing equipment. Again the inner bag cannot be separated and it has a poor standing-ability.
- Other types of multi-wall bags are described in the following family of patents: U.S. Pat. Nos. 3,807,626; 3,910,488 and 3,958,749 (all GOODRICH) which all disclose a gusseted pinch bottom breakaway pouch bag. These documents specify that the bags have an innermost bag ply of a heat sealable plastic material. In the process of bag manufacture on a bag tuber, the innermost bag ply is only loosely adhered to the contiguous outer paper ply for manual detachment therefrom and is heat sealed transversely, through the outer bag at the closed end, by heat sealing between pressure bars. The bag closure at the closed end is otherwise completed by folding over an overlapping wall portion of the outermost plies and sealing against the outer wall. Also, when the bag is filled with a comestible or the like, the opposite end of the plastic ply is closed by heat sealing as well as by heating a thermoplastic adhesive prior to folding over and sealing the overlapping wall portions H of the outermost plies at the end. The plastic ply is of such length as not to be included in the sealed bag end closures provided by the outermost plies. The bag may thus be opened in the outermost plies leaving intact the plastic ply and therein the packaged contents. Since the plastic ply is only lightly adhered to the contiguous ply, the outer plies may be torn or cut away and peeled off of the plastic ply without rupture thereof for removal of a thus completely sealed and impervious plastic ply container of the packaged material. These documents further disclose that the bag can be opened by pulling on a tear cord.
- Unfortunately, the GOODRICH-type bag must be filled upside down in order to get the easy open at the top afterwards. This type of bag is not very stable in upright positions, especially in very large formats. The tear cord is located on the bottom (closed) end and not at the customer top end which is usually sealed by the customer. The cord type easy opening feature could not be applied on the customer end as it is too long and non rigid. Since the ends of the cord could easily be trapped in the flap when closed by the customer, the end user might not have any access to the cord ends in order to open the bag.
- Similarly, U.S. Pat. No. 5,007,233 (BOSE) teaches a multi-wall bag including an outer paper bag and one or more inner thermoplastic bags that are ultrasonically sealed closed. The open end of the paper bag is closed and folded back on itself with a small amount of adhesive being applied to keep the paper bag closed. Once again, the paper bag can easily be opened and the thermoplastic bag can be removed therefrom. However, once again, this type of bag does not have a flat bottom and is not stable in an upright position.
- U.S. Pat. No. 6,536,190 (WEBB) discloses a multi-wall sack having an inner bag and an outer bag which encloses the inner bag and has block ends. Similarly to POM PT bags described above, the easy open feature on this bag is located within the patch (or label) at the end of the bag. This easy open feature is not very efficient as many steps are required to open the bag. Consequently, customers very often use a knife to rip open the bag. This method of opening is hazardous, with risk of injury to the customer or damage to the inner bag. This in turn may result in a loss of product which can be costly in cases where the product being carried in the bag is expensive.
- Several other prior art documents describe various types of multi-wall bags and methods of closing these bags. These documents are known to the Applicant by the following patent numbers: U.S. Pat. No. 3,929,275 (BOLLING et al.); U.S. Pat. No. 4,110,953 (HOLMES); U.S. Pat. No. 4,210,249 (HOLMES); U.S. Pat. No. 4,353,770 (KUCKHERMANN); U.S. Pat. No. 4,557,385 (ROBINSON); U.S. Pat. No. 4,840,611 (VAN ERDEN et al.); U.S. Pat. No. 5,007,233 (BOSE); U.S. Pat. No. 5,338,117 (KUCKSDORF et al.); U.S. Pat. No. 5,365,720 (BUNCH); and U.S. Pat. No. 6,168,312 (HAUSSLEIN).
- An easy opening feature at the customer open end of bags is yet to be seen in the prior art. It is very difficult to apply an easy open feature at the customer end. There is thus still a need for a POM PT bag having an easy open feature at the customer end.
- An object of the invention is to provide a POM PT bag that satisfies the above-mentioned need.
- According to the present invention, that object is achieved with a bag comprising:
-
- an open top end;
- a closed bottom end;
- a first wall portion;
- a second wall portion opposite the first wall portion;
- an upper flap on the first wall portion extending above a top edge of the second wall portion, and being foldable against the second wall portion, the upper flap having two opposite side edges;
- an adhesive along the upper flap for closure of the upper flap against the second wall portion after being folded; and
- a ripping strip extending along the upper flap in an area between a location above the top edge of the second wall portion and the adhesive.
- Preferably, the bag according to the present invention comprises an inner bag of heat sealable plastic material removably attached to the above-mentioned bag, hereinafter referred to as an outer bag, comprising:
-
- a closed bottom end removably bonded on an inside surface of the outer bag adjacent the closed bottom end of the outer bag; and
- an open top end removably bonded on the inside surface of the outer bag adjacent the open top end of the outer bag, the inner bag being sized such that a top edge thereof extends at a same level with or below the top edge of the second wall portion of the outer bag.
- Preferably, the ripping strip has at least one end exceeding one of said side edges of the flap.
- As can be appreciated, the bag according to the present invention has an easy-open feature at the customer end of the bag.
- Another object of the invention is to provide such a POM PT bag having an inserted liner or inner bag. Preferably, the inner bag is made of polyethylene. In another embodiment of the present invention, the inner bag may be omitted.
- Preferably, the outer bag is made of multiple-ply paper. In another embodiment of the present invention, the outer bag is made of a single ply paper sufficiently strong to hold the contents of the bag.
- Preferably, the outer bag comprises an inner ply, a mid ply and an outer ply. The upper flap is formed by upper extensions of the outer ply and the mid ply. The upper extension of the outer ply is longer than the upper extension of the inner ply. In another embodiment of the present invention, the outer bag and upper flap comprise additional plies, depending on the design requirements of the bag.
- Another object of the invention is to provide such a POM PT bag having a top closure that can be folded above a customer seal in order for an inner liner or inner bag to be fully independent from the outer bag after the bag is opened with the help of a ripping-strip (easy opening feature). Preferably, frangible dotted lines or slits are provided on either side of the ripping strip and in proximity thereof to facilitate the opening of the bag. Preferably, in the case of paper bags, at least one of the side edges of the upper flap is provided with a slit on either side of the ripping strip in proximity thereof to facilitate the ripping of the upper flap. As mentioned above, according to a preferred embodiment, the ripping strip has at least one end exceeding one of said side edges of the flap. According to another preferred embodiment, the ripping strip does not exceed one of the said side edges of the flap. Access to the ripping strip in this configuration is made possible by providing slits on either side of the ripping strip, thereby allowing the ripping strip to be lifted and pulled to open the bag.
- Another object of the invention is to provide such a POM PT bag wherein the inner bag is not trapped in an upper flap of the outer bag in order for the bag to be fully recyclable.
- Another object of the invention is to provide such a POM PT bag in which an inner bag can be removed from the bag for hygienic reasons (as for the food and pharmaceutical industries).
- Another object of the invention is to provide a POM PT bag comprising an adhesive material applied on a ply step of the bag, a ripping-strip and a non adhesive coated area embedding the ripping-strip. Preferably, the adhesive is hot met glue. In another preferred embodiment, the adhesive is a two-face adhesive tape.
- Preferably, the bottom of the bag also comprises a folded flat bottom.
- Another object of the present invention is to provide a method of closing a bag including an inner bag, according to the present invention, comprising the following steps at the completion of filling a product into the bag through the open top ends of the inner and outer bags:
-
- (a) sealing the inner bag through the outer bag to form a customer seal which closes the inner bag; and
- (b) folding the upper flap against the second wall portion of the outer bag.
- Preferably, when the adhesive on the ply step is a hot melt glue, the method further comprises, between step (a) and step (b), a step of heating the adhesive.
- Preferably, step (a) of sealing of the method according to the present invention comprises the step of heating the inner bag through the outer bag with heating elements.
- Another object of the present invention is to provide a bag comprising:
-
- an outer bag comprising:
- an open top end
- a closed bottom end;
- a first wall portion,
- a second wall portion opposite the first wall portion;
- an upper flap on the first wall portion extending above a top edge of the second wall portion, and being foldable against the second wall portion, the upper flap having two opposite side edges;
- an adhesive along the upper flap for closure of the upper flap against the second wall portion after being folded; and
- a ripping strip extending along the upper flap in an area between a location above the top edge of the second wall portion and the adhesive; the ripping strip having at least one end exceeding one of said side edges of the flap; and
- an inner bag of heat sealable plastic material removably attached to the outer bag, comprising:
- a closed bottom end removably bonded on an inside surface of the outer bag adjacent the closed bottom end of the outer bag; and
- an open top end removably bonded on the inside surface of the outer bag adjacent the open top end of the outer bag, the inner bag being sized such that a top edge thereof extends at a same level with or below the top edge of the second wall portion of the outer bag.
- an outer bag comprising:
- These and other objects and advantages of the invention will become apparent upon reading the detailed description and upon referring to the drawings in which:
-
FIG. 1 is a perspective front view of a top portion of a POM PT bag according to a preferred embodiment of the present invention, with an upper portion of the second wall portion of the outer bag broken away to show the inner bag; -
FIG. 2 is another perspective front view of the top portion of the POM PT bag ofFIG. 1 , with the flap folded against the second wall portion; -
FIG. 3 is another perspective front view of the POM PT bag ofFIG. 1 showing the top and the bottom closures. -
FIG. 4 is a perspective front view of the bottom portion of the POM PT bag ofFIG. 1 , showing the bottom enclosure partially opened. -
FIG. 5 is a perspective front view of a POM PT bag according to another preferred embodiment which includes a mid-step with the mid ply. -
FIG. 6 is a perspective front view of the top portion of the POM PT bag ofFIG. 5 including a mid-step with the mid ply. - Referring to FIGS. 1 to 6, there is shown a POM PT style paper bag having an outer ply 1. The number of plies can varies through the field of application and the bag is preferably made of paper. The bag comprises a pasted open mouth and has a pinched top closure. The bag has a flat bottom closure in order for the bag to stand in an upright position on a flat surface such as a conveyor and to stack better when compared, for example, to PBOM-type bags. The filled bag preferably has a triangular profile converging from the bottom closure to a top closure of the bag when in standing position.
- More specifically, the bag according to the present invention comprises an
outer bag 20. Preferably, the bag according to the present invention further comprises aninner bag 3. In another embodiment of the present invention, theinner bag 3 may be omitted. - The
outer bag 20 comprises an opentop end 22 and a closedbottom end 2. Theouter bag 20 further comprises afirst wall portion 24 and asecond wall portion 26 opposite thefirst wall portion 24. Moreover, theouter bag 20 comprises anupper flap 10 on thefirst wall portion 24 extending above atop edge 34 of thesecond wall portion 26. The upper flap is foldable against thesecond wall portion 26, and has two opposite side edges. Furthermore, theouter bag 20 comprises an adhesive 6 along theupper flap 10 for closure of theupper flap 10 against thesecond wall portion 26 after being folded. Theouter bag 20 further comprises a rippingstrip 8 extending along theupper flap 10 in an area 7 between a location above thetop edge 34 of thesecond wall portion 26 and the adhesive 6. The rippingstrip 8 has at least one end exceeding one of the side edges of theflap 10. According to another preferred embodiment, the rippingstrip 8 does not exceed one of the side edges of the flap. Access to the rippingstrip 8 in this other configuration is made possible by providing slits on either side of the rippingstrip 8, thereby allowing the rippingstrip 8 to be lifted and pulled to open the bag. - The
inner bag 3 is made of heat sealable plastic material and is removably attached to theouter bag 20. Theinner bag 3 comprises a closedbottom end 30 removably bonded on an inside surface of theouter bag 20 adjacent the closedbottom end 2 of theouter bag 20. Theinner bag 3 further comprises an opentop end 28 removably bonded on the inside surface of theouter bag 20 adjacent the opentop end 22 of theouter bag 20. Theinner bag 3 is sized such that atop edge 32 thereof extends at a same level with or below thetop edge 34 of thesecond wall portion 26 of theouter bag 20. - As mentioned above the
top closure 12 of the bag has anupper flap 10 that can be folded, along aguideline axis 5, on the outer ply 1 for closing the open mouth. The adhesive is preferably acoated adhesive 6 located on theupper flap 10. Preferably, thecoated adhesive 6 applied on theupper flap 10 is a strip of hot melt glue. The hot melt glue has to be reactivated before closure of the bag to ensure a tight seal. Other adhesive coating material, or tape, can also be used for the same purpose. For example, a two-face adhesive tape can be applied on theupper flap 10. An advantage of the adhesive tape over the hot melted glue is that it does not require from a user to have a special closing equipment to close the bag. A soluble glue can also be used to facilitate recycling of the paper bag. - The ripping-
strip 8 is located within an area 7. The area 7 is located between theadhesive coating material 6 on theupper flap 10 and the open mouth of the bag. This area 7 is kept free of adhesive material and hence forms a non-coated area 7. The ripping-strip 8 can be made of any synthetic material. For easy gripping by a user, the ripping-strip 8 has aportion 11 exceeding an edge of the bag. Thisportion 11 of the ripping-strip 8 provides adequate length for the customer to get hold of it. The bag preferably has frangible dotted lines 9 (or alternately slits) on both sides along the ripping-strip 8 to further ease the opening process. The ripping-strip 8 is preferably cut at the width of the paper bag. The ripping strip is preferably made of tape which is pre-glued (self adhesive) and this tape could be applied by pressure or with a combination of heat and pressure. - The
inner bag 3 is inserted within the bag. Theinner bag 3 is preferably made of polyethylene. The open mouth of theinner bag 3 is located near the open mouth of the outer bag. - During the manufacturing process of the bag, the
inner bag 3 is mechanically inserted into the outer bag in the form of a continuous poly tubing. The bottom of this poly tubing is heat sealed during the manufacturing process. As shown inFIG. 4 , glue points between the bag and theinner bag 3 secure the bottom of theinner bag 3, including theseal 14, to the interior bottom of theouter bag 20. Theinner bag 3 can be completely removed from the bag after the pinched top closure is ripped open by the ripping-strip 8. - At a user's filling facility, for example, a product is filled in the
inner bag 3. Then, using a conventional sealer, theinner bag 3 is sealed through the paper bag to form thecustomer seal 4. Theadhesive coating material 6 is heated and theupper flap 10 is folded just above thecustomer seal 4 of the inner bag. - Consequently, another object of the present invention is to provide a method of closing a bag including an inner bag, comprising the following steps at the completion of filling a product into the bag through the open top ends of the inner and outer bags:
-
- (a) sealing the
inner bag 3 through theouter bag 10 to form a customer seal which closes theinner bag 3; and - (b) folding the
upper flap 10 against thesecond wall portion 26 of theouter bag 20.
- (a) sealing the
- The sealing of the open mouth of the
inner bag 3 is preferably done by heating elements heating theinner bag 3 through the paper bag. The heat is transferred to theinner bag 3 which seals itself. It is important to note that during the sealing process, theinner bag 3 does not react with the paper bag and does not adhere to it. To remove theinner bag 3 once theupper flap 10 is folded and sealed on the outer ply 1, the user has to grab the ripping-strip 8 by the exceedingportion 11 and tear it off. Then, the user can remove theinner bag 3 from the outer bag or leave it there. This is a bag in a bag concept. - It is recommended to use high performance paper in order to provide a strong flap at the closure. As shown in
FIGS. 5 and 6 , it is also possible to position a mid-step with themid ply 40 in a 3 paper ply bag design. The mid-step is designed in such a way that the inner bag would still be positioned above thefolding line 5. Thismid step 40 can stiffen and reinforce theflap 10. In another preferred embodiment, more steps may be provided. - More specifically, the
outer bag 20 preferably comprises an inner ply, amid ply 40 and anouter ply 42. Theupper flap 10 is formed by upper extensions of theouter ply 42 and themid ply 40. Theupper extension 44 of theouter ply 42 is longer than theupper extension 46 of themid ply 40. - The bag is also compatible with a sealing head where the inner bag is trimmed just above the seal. The stepping pattern could be traditional or the one step as described in this patent.
- In the case of a three paper ply bag, the mid ply could be stepped at mid position of the outer ply step. In this case it could be possible to add two slits at the start to help the opening.
- The POM PT style bag of the present invention has the following advantages:
-
- Easy access to the inner bag 3 (poly tubing), easy, secure and fast opening;
- The paper bag and the poly bag are recyclable;
- Compatible with a conventional sealer where the inner bag is heat sealed through the paper bag at the top. The conventional sealer cannot cut the inner bag above the seal;
- This bag style offers a good pallet display;
- Stands very well on conveyors or on the floor;
- Minimum labour required for the filling process;
- Very hygienic bag as there is a minimal handling. The bag and the process were designed in order to minimize the potential product contamination. This bag is compatible with the actual requirements of the food industry;
- The closing is strong and secure from a food safety perspective; and
- The bag is compatible with existing automatic bag feeders.
- The POM PT bag can be made of the following materials:
-
- Inner bag 3: Poly tubing (should be strong enough to carry the material by itself);
- Inner ply of the paper bag: Multi-wall kraft paper (high performance paper is recommended);
- Mid ply of the paper bag (optional): Multi-wall kraft paper (high performance paper is recommended);
- Outer ply of the paper bag: Multi-wall kraft paper (printed or plain; high performance paper is recommended); and
- Closure components: Hot melt glue (regular or soluble) or two sided auto-adhesive tape, ripping-strip made of synthetic material.
- While embodiments of this invention have been illustrated in the accompanying drawings and described above, it will be evident to those skilled in the art that changes and modifications may be made therein without departing from the essence of this invention.
Claims (17)
1. A bag comprising:
an open top end;
a closed bottom end;
a first wall portion;
a second wall portion opposite the first wall portion;
an upper flap on the first wall portion extending above a top edge of the second wall portion, and being foldable against the second wall portion, the upper flap having two opposite side edges;
an adhesive along the upper flap for closure of the upper flap against the second wall portion after being folded; and
a ripping strip extending along the upper flap in an area between a location above the top edge of the second wall portion and the adhesive.
2. A bag according to claim 1 , comprising:
an inner bag of heat sealable plastic material removably attached to said bag, hereinafter referred to as an outer bag, comprising:
a closed bottom end removably bonded on an inside surface of the outer bag adjacent the closed bottom end of the outer bag; and
an open top end removably bonded on the inside surface of the outer bag adjacent the open top end of the outer bag, the inner bag being sized such that a top edge thereof extends at a same level with or below the top edge of the second wall portion of the outer bag.
3. A bag according to claim 1 , wherein the ripping strip has at least one end exceeding one of said side edges of the flap.
4. A bag according to claim 1 , wherein the adhesive is a strip of hot melt glue.
5. A bag according to claim 1 , wherein the adhesive is a two-face adhesive tape.
6. A bag according to claim 1 , wherein the upper flap has frangible dotted lines on either side of the ripping strip and in proximity thereof to facilitate the ripping of the upper flap.
7. A bag according to claim 1 , wherein at least one of the side edges of the upper flap is provided with a slit on either side of the ripping strip in proximity thereof to facilitate the ripping of the upper flap.
8. A bag according to claim 2 , wherein the outer bag is made of paper.
9. A bag according to claim 2 , wherein the outer bag is made of multiple plies.
10. A bag according to claim 9 , wherein the outer bag comprises an inner ply, a mid ply and an outer ply, and wherein the upper flap is formed by upper extensions of the outer ply and the mid ply.
11. A bag according to claim 10 , wherein the upper extension of the outer ply is longer than the upper extension of the mid ply.
12. A bag according to claim 2 , wherein the inner bag is made of polyethylene.
13. A bag according to claim 1 , wherein the closed bottom end of the outer bag is a flat bottom.
14. A method of closing a bag according to claim 2 , comprising the following steps at the completion of filling a product into the bag through the open top ends of the inner and outer bags:
(a) sealing the inner bag through the outer bag to form a customer seal which closes the inner bag; and
(b) folding the upper flap against the second wall portion of the outer bag.
15. The method according to claim 14 , wherein the adhesive is a hot melt glue and the method further comprises, between step (a) and step (b), a step of heating the adhesive.
16. The method according to claim 14 , wherein step (a) of sealing comprises the step of heating the inner bag through the outer bag with heating elements.
17. A bag comprising:
an outer bag comprising:
an open top end
a closed bottom end;
a first wall portion,
a second wall portion opposite the first wall portion;
an upper flap on the first wall portion extending above a top edge of the second wall portion, and being foldable against the second wall portion, the upper flap having two opposite side edges;
an adhesive along the upper flap for closure of the upper flap against the second wall portion after being folded; and
a ripping strip extending along the upper flap in an area between a location above the top edge of the second wall portion and the adhesive; the ripping strip having at least one end exceeding one of said side edges of the flap; and
an inner bag of heat sealable plastic material removably attached to the outer bag, comprising:
a closed bottom end removably bonded on an inside surface of the outer bag adjacent the closed bottom end of the outer bag; and
an open top end removably bonded on the inside surface of the outer bag adjacent the open top end of the outer bag, the inner bag being sized such that a top edge thereof extends at a same level with or below the top edge of the second wall portion of the outer bag.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA2,437,290 | 2003-08-13 | ||
CA002437290A CA2437290A1 (en) | 2003-08-13 | 2003-08-13 | Pom pt one step with a cross directional ripping-strip |
Publications (1)
Publication Number | Publication Date |
---|---|
US20050111765A1 true US20050111765A1 (en) | 2005-05-26 |
Family
ID=34140449
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/917,509 Abandoned US20050111765A1 (en) | 2003-08-13 | 2004-08-13 | POM PT one step with a cross directional ripping-strip |
Country Status (2)
Country | Link |
---|---|
US (1) | US20050111765A1 (en) |
CA (1) | CA2437290A1 (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20070104397A1 (en) * | 2005-11-04 | 2007-05-10 | Smurfit-Stone Container Enterprises, Inc. | Bag structures and methods of assembling the same |
US20090263049A1 (en) * | 2008-04-16 | 2009-10-22 | Iannelli Ii Michael Louis | Bag Structures And Methods Of Assembling The Same |
US20090263048A1 (en) * | 2008-04-16 | 2009-10-22 | Iannelli Ii Michael Louis | Bag Structures And Methods Of Assembling The Same |
US20110002558A1 (en) * | 2009-07-02 | 2011-01-06 | Sargin Gary F | Hooded bag with reclosable top |
US20120012631A1 (en) * | 2008-02-06 | 2012-01-19 | Intravena, Llc | Methods for exposing and using a swab |
US20140270598A1 (en) * | 2013-03-15 | 2014-09-18 | Standard Multiwall Bag Manufacturing Co. | Easy Open Apparatus and Method for Multi-Ply Bags |
CN112469635A (en) * | 2020-10-29 | 2021-03-09 | 任德坚 | Storage device and external hardware |
CN112550944A (en) * | 2020-11-26 | 2021-03-26 | 保定市正汇包装彩印有限公司 | Shock-absorbing environment-friendly paper bag with honeycomb paper lining and manufacturing method thereof |
WO2023220409A1 (en) * | 2022-05-12 | 2023-11-16 | Pan Pacific Plastics Mfg., Inc. | Tamper evident sealable bag assembly with note tab and method |
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US5365720A (en) * | 1991-05-30 | 1994-11-22 | Bagcraft Corporation Of America | Method of making window bag assembly with high resolution graphic content replicating indicia |
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US20030035598A1 (en) * | 2001-08-16 | 2003-02-20 | Showa Paxxs Corporation | Paper bag with film inner bag |
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US20030147566A1 (en) * | 2002-02-02 | 2003-08-07 | Brocking Brent Edward | Disposable ash container |
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-
2003
- 2003-08-13 CA CA002437290A patent/CA2437290A1/en not_active Abandoned
-
2004
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US2488212A (en) * | 1945-10-18 | 1949-11-15 | Visking Corp | Method of sealing thermoplastic material |
US3807626A (en) * | 1972-03-20 | 1974-04-30 | St Regis Paper Co | Gusseted pinch bottom breakaway pouch bag |
US3910488A (en) * | 1972-03-20 | 1975-10-07 | St Regis Paper Co | Gusseted pinch bottom breakaway pouch bag |
US3929275A (en) * | 1972-07-07 | 1975-12-30 | Union Camp Corp | Bags with film liners and method of making |
US3958749A (en) * | 1974-04-12 | 1976-05-25 | St. Regis Paper Company | Gusseted pinch bottom breakaway pouch bag |
US4110953A (en) * | 1975-03-11 | 1978-09-05 | Professional Packaging Limited | Reclosable bag closure system |
US4210249A (en) * | 1975-03-11 | 1980-07-01 | Professional Packaging Limited | Reclosable bag closure system |
US4353770A (en) * | 1979-12-21 | 1982-10-12 | Icoma Packtechnik Gmbh | Method for welding the inner layers of multi-layer paper sacks |
US4557385A (en) * | 1984-02-23 | 1985-12-10 | Union Camp Corporation | Bag with easy open line of perforations |
US4637063A (en) * | 1985-03-04 | 1987-01-13 | Kcl Corporation | Reclosable bag with sealed laminated liner and method |
US4580683A (en) * | 1985-05-01 | 1986-04-08 | Jiffy Packaging Corp. | High security self-sealing mailing receptacle |
US4840611A (en) * | 1985-11-20 | 1989-06-20 | Minigrip, Inc. | Gusseted bags with reclosure features |
US4877139A (en) * | 1986-12-30 | 1989-10-31 | Kim Myun H | Container with an opening device comprising a guide strip and tear band |
US4946289A (en) * | 1987-02-06 | 1990-08-07 | Union Camp Corporation | Reclosable open mouth bag |
US5007233A (en) * | 1989-08-31 | 1991-04-16 | Union Camp Corporation | Multiwall bag and method of packaging utilizing multiwall bags |
US5365720A (en) * | 1991-05-30 | 1994-11-22 | Bagcraft Corporation Of America | Method of making window bag assembly with high resolution graphic content replicating indicia |
US5338117A (en) * | 1993-01-27 | 1994-08-16 | American Packaging Corporation | Bag and method of making the same |
US5836444A (en) * | 1995-07-11 | 1998-11-17 | Minnesota Mining & Manufacturing Co. | Pouch for orthodontic appliance |
US6228458B1 (en) * | 1995-09-28 | 2001-05-08 | P. P. Payne Limited | Package with tear tape and method of forming same |
US6536190B1 (en) * | 1996-10-31 | 2003-03-25 | Amcor Packaging (Australia) Pty Ltd. | Multi-wall sack |
US6168312B1 (en) * | 1999-06-09 | 2001-01-02 | Arthur D. Little Enterprises, Inc. | Closure system for pliable container |
US20030035598A1 (en) * | 2001-08-16 | 2003-02-20 | Showa Paxxs Corporation | Paper bag with film inner bag |
US20050063624A1 (en) * | 2001-12-18 | 2005-03-24 | Idemitsu Unitech Co., Ltd. | Sealed bag with unsealing tape |
US20030147566A1 (en) * | 2002-02-02 | 2003-08-07 | Brocking Brent Edward | Disposable ash container |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20070104397A1 (en) * | 2005-11-04 | 2007-05-10 | Smurfit-Stone Container Enterprises, Inc. | Bag structures and methods of assembling the same |
US7819583B2 (en) * | 2005-11-04 | 2010-10-26 | Graphic Packaging International, Inc. | Bag structures and methods of assembling the same |
US20120012631A1 (en) * | 2008-02-06 | 2012-01-19 | Intravena, Llc | Methods for exposing and using a swab |
US8485356B2 (en) * | 2008-02-06 | 2013-07-16 | Intra Vena, LLC | Methods for exposing and using a swab |
US8142077B2 (en) | 2008-04-16 | 2012-03-27 | Graphic Packaging International, Inc. | Bag structures and methods of assembling the same |
US20090263048A1 (en) * | 2008-04-16 | 2009-10-22 | Iannelli Ii Michael Louis | Bag Structures And Methods Of Assembling The Same |
US20090263049A1 (en) * | 2008-04-16 | 2009-10-22 | Iannelli Ii Michael Louis | Bag Structures And Methods Of Assembling The Same |
US20110002558A1 (en) * | 2009-07-02 | 2011-01-06 | Sargin Gary F | Hooded bag with reclosable top |
US20140270598A1 (en) * | 2013-03-15 | 2014-09-18 | Standard Multiwall Bag Manufacturing Co. | Easy Open Apparatus and Method for Multi-Ply Bags |
US9139339B2 (en) * | 2013-03-15 | 2015-09-22 | Standard Multiwall Bag Manufacturing Co. | Easy open apparatus and method for multi-ply bags |
US20150367983A1 (en) * | 2013-03-15 | 2015-12-24 | Standard Multiwall Bag Manufacturing Co. | Easy Open Apparatus and Method for Multi-Ply Bags |
CN112469635A (en) * | 2020-10-29 | 2021-03-09 | 任德坚 | Storage device and external hardware |
CN112550944A (en) * | 2020-11-26 | 2021-03-26 | 保定市正汇包装彩印有限公司 | Shock-absorbing environment-friendly paper bag with honeycomb paper lining and manufacturing method thereof |
WO2023220409A1 (en) * | 2022-05-12 | 2023-11-16 | Pan Pacific Plastics Mfg., Inc. | Tamper evident sealable bag assembly with note tab and method |
Also Published As
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: HOOD PACKAGING CORPORATION, CANADA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:BEAULIEU, SYLVAIN;REEL/FRAME:016202/0671 Effective date: 20050125 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |