US20170349348A1 - Film for gas discharge and bag made from the same - Google Patents
Film for gas discharge and bag made from the same Download PDFInfo
- Publication number
- US20170349348A1 US20170349348A1 US15/174,647 US201615174647A US2017349348A1 US 20170349348 A1 US20170349348 A1 US 20170349348A1 US 201615174647 A US201615174647 A US 201615174647A US 2017349348 A1 US2017349348 A1 US 2017349348A1
- Authority
- US
- United States
- Prior art keywords
- film
- bag
- gas discharge
- layer
- outer film
- 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
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B70/00—Making flexible containers, e.g. envelopes or bags
- B31B70/74—Auxiliary operations
- B31B70/81—Forming or attaching accessories, e.g. opening devices, closures or tear strings
- B31B70/84—Forming or attaching means for filling or dispensing contents, e.g. valves or spouts
- B31B70/855—Forming valves integral with the containers
-
- 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
- B65D79/00—Kinds or details of packages, not otherwise provided for
- B65D79/005—Packages having deformable parts for indicating or neutralizing internal pressure-variations by other means than venting
-
- 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
- B65D75/28—Articles or materials wholly enclosed in composite wrappers, i.e. wrappers formed by associating or interconnecting two or more sheets or blanks
- B65D75/30—Articles or materials enclosed between two opposed sheets or blanks having their margins united, e.g. by pressure-sensitive adhesive, crimping, heat-sealing, or welding
-
- 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
- B65D77/225—Pressure relief-valves incorporated in a container wall, e.g. valves comprising at least one elastic element
-
- 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
- B65D85/70—Containers, packaging elements or packages, specially adapted for particular articles or materials for materials not otherwise provided for
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B2155/00—Flexible containers made from webs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B2160/00—Shape of flexible containers
- B31B2160/20—Shape of flexible containers with structural provision for thickness of contents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B2170/00—Construction of flexible containers
- B31B2170/20—Construction of flexible containers having multi-layered walls, e.g. laminated or lined
Definitions
- the invention relates to bags and more particularly to a film for gas discharge and a bag made from the films for gas discharge.
- Coffee beans are typically packaged in a bag such as plastic bag. Coffee beans may exhale to accumulate gas in the bag. Thus, the bag may expand and even explode due to gas expansion. Further, the inflated bag may hinder storage or delivery due to increased space. Thus, many inventors have thought how to solve the problem.
- a conventional bag 90 is shown in FIG. 7 and includes a check valve 91 for allowing gas in the bag 90 to pass through to expel. External air and pollutants are prevented from entering the bag 90 via the check valve 91 .
- check valve 91 While the check valve 91 is good in its claimed function, its complicated components, time consuming assembly, and low production hinder its success in the market.
- It is therefore one object of the invention to provide a film for gas discharge comprising an inner film member; an outer film member; adhesive for securing the inner and outer film members together; an inlet disposed through the inner film member; an outlet disposed in the adhesive adjacent to ends of the inner and outer film members; a release member disposed between the inlet and the outlet; and a valve formed of non-adhesive plastic and disposed on the release member; wherein the valve is configured to close the release member to block a passage from the inlet to the outlet or open the release member to unblock the passage.
- the outlet is a hole.
- the inlet is a hole.
- the release member is formed of release agent and disposed between the outer film member and the adhesive.
- the release member is formed of release agent and disposed between the inner film member and the adhesive.
- the outer film member is formed of polyester
- the inner film member is a stack of aluminum (AL) layer, polyethylene (PE) layer, and hot adhesive layer made of linear low-density polyethylene (LLDPE) or polypropylene (PP).
- AL aluminum
- PE polyethylene
- PP polypropylene
- the outer film member is a stack of polyester layer, polyethylene (PE) layer, and aluminum (AL) layer
- the inner film member is a hot adhesive layer made of linear low-density polyethylene (LLDPE) or polypropylene (PP).
- LLDPE linear low-density polyethylene
- PP polypropylene
- the outlet is a hole.
- the inlet is a hole.
- the release member is formed of release agent and disposed between the outer film member and the adhesive.
- the release member is formed of release agent and disposed between the inner film member and the adhesive.
- the outer film member is formed of polyester
- the inner film member is a stack of aluminum (AL) layer, polyethylene (PE) layer, and hot adhesive layer made of linear low-density polyethylene (LLDPE) or polypropylene (PP).
- AL aluminum
- PE polyethylene
- PP polypropylene
- the outer film member is a stack of polyester layer, polyethylene (PE) layer, and aluminum (AL) layer
- the inner film member is a hot adhesive layer made of linear low-density polyethylene (LLDPE) or polypropylene (PP).
- LLDPE linear low-density polyethylene
- PP polypropylene
- the invention has the advantages of being mass produced, no additional assembly, and a bag or part thereof being made from the film for gas discharge.
- FIG. 1A is an exploded view of a film for gas discharge according to a first preferred embodiment of the invention
- FIG. 1B is a plan view of the formed film for gas discharge
- FIG. 1C is a sectional view taken along line 1 C- 1 C of FIG. 1B where the valve is closed;
- FIG. 1D is a view similar to FIG. 1C showing a channel formed by the open valve
- FIG. 1E is a perspective view of the film for gas discharge wound into a roll
- FIG. 2 is a perspective view of a bag formed by the films for gas discharge
- FIG. 3 is an exploded view of a film for gas discharge according to a second preferred embodiment of the invention.
- FIG. 4A is an exploded view of a film for gas discharge according to a third preferred embodiment of the invention.
- FIG. 4B is a plan view of the formed film for gas discharge
- FIG. 4C is a sectional view taken along line 4 C- 4 C of FIG. 4B where the valve is closed;
- FIG. 4D is a view similar to FIG. 4C showing a channel formed by the open valve
- FIG. 4E is a perspective view of the film for gas discharge wound into a roll
- FIG. 5 is a perspective view of a bag formed by the films for gas discharge
- FIG. 6A is an exploded view of a film for gas discharge according to a fourth preferred embodiment of the invention.
- FIG. 6B is a plan view of the formed film for gas discharge
- FIG. 6C is a sectional view taken along line 6 C- 6 C of FIG. 6B where the valve is closed;
- FIG. 6D is a view similar to FIG. 6C showing a channel formed by the open valve
- FIG. 7 is a perspective view of a conventional bag.
- a film for gas discharge 100 in accordance with a first preferred embodiment of the invention comprises the following components as discussed in detail below.
- the film for gas discharge 100 includes an inlet 111 shaped a circular hole (or a plurality holes in other embodiments), an outlet 121 at an end of the inner film member 11 (see FIG. 1C ), a release member 13 disposed in the adhesive 10 and between the inlet 111 and the outlet 121 , and a valve 14 on the release member 13 adjacent to the inlet 111 .
- the release member 13 is made of release agent or any of similar materials.
- the release member 13 is disposed between the inner film member 11 and the adhesive 10 .
- the outer film member 12 is made of polyester such as polyethylene terephthalate (PET), the inner film member 11 is a stack of aluminum (AL) layer, polyethylene (PE) layer, and hot adhesive layer made of Linear low-density polyethylene (LLDPE) or polypropylene (PP).
- PET polyethylene terephthalate
- AL aluminum
- PE polyethylene
- PP polypropylene
- the outer film member 12 is a stack of polyester (e.g., PET) layer, PE layer, and AL layer, and the inner film member 11 is a hot adhesive layer made of LLDPE or PP.
- the film for gas discharge 100 is produced by a machine and wound into a roll (see FIG. 1E ).
- the roll facilitates storage, delivery and mass production.
- a bag 200 produced either completely by a plurality of films for gas discharge 100 or by some films for gas discharge 100 and other components is shown.
- the manufacture of the bag 200 is not the subject of the invention and thus a detailed description thereof is omitted herein for the sake of brevity. Only the manufacture of the film for gas discharge 100 is discussed in detail below.
- the inner film member 11 is an inner layer of the bag 200 and the outer film member 12 is an outer layer (i.e., outer surface) of the bag 200 .
- the film for gas discharge 100 is shaped as that shown in FIG. 1C when internal pressure of the bag 200 is less than a predetermine pressure.
- the valve 14 is closed to block (i.e., close) the release member 13 .
- Food e.g., coffee beans
- Internal pressure of the bag 200 thus increases.
- a channel 131 is formed and the valve 14 disengages from the release member 13 when the internal pressure of the bag 200 is greater than the predetermine pressure.
- gas in the bag 200 may enter the channel 131 via the inlet 11 and finally leave the bag 200 via the outlet 121 as indicated by arrows of FIG. 1D .
- the bag 200 returns to the state of FIG. 1C when the internal pressure of the bag 200 is less than the predetermine pressure.
- the release member 13 is blocked by the valve 14 , thereby preventing external gas and pollutants from entering the bag 200 .
- the valve 14 is formed of rubber or acrylic.
- the inlet 111 of the film for gas discharge 100 corresponds to the release member 13 (or a plurality of release members 13 in other embodiments).
- a film for gas discharge 300 in accordance with a second preferred embodiment of the invention is shown.
- the characteristics of the second preferred embodiment are substantially the same as that of the first preferred embodiment except the following:
- the inlet 111 of the film for gas discharge 300 corresponds to two release members 13 each having a valve 14 and an outlet 121 .
- the valve 14 is shaped as a ring around the inlet 111 and further disposed on the release members 13 .
- the valve 14 is an integral member.
- the outlets 121 of the film for gas discharge 300 are at edges of the inner film member 11 and pressed by the outer film member 12 .
- the outlets 121 may be provided on the outer film member 12 in other embodiments.
- a film for gas discharge 400 in accordance with a third preferred embodiment of the invention is shown.
- the characteristics of the third preferred embodiment are substantially the same as that of the first preferred embodiment such as the inner film member 11 , the outer film member 12 , the inlet 111 , the outlet 121 , the release member 13 , the valve 14 , and the adhesive 10 except the following:
- the outlet 121 is provided through the adhesive 10 and the outer film member 12 .
- the outlet 121 is a through hole and adjacent to the release member 13 .
- a bag 700 produced either completely by a plurality of films for gas discharge 400 or by some films for gas discharge 400 and other components is shown.
- the inner film member 11 is an inner layer of the bag 700 and the outer film member 12 is an outer layer (i.e., outer surface) of the bag 700 .
- the outlet 121 is provided through the adhesive 10 and the outer film member 12 .
- the film for gas discharge 400 is shaped as that shown in FIG. 4C when internal pressure of the bag 700 is less than a predetermine pressure.
- the valve 14 is closed to block (i.e., close) the release member 13 .
- Food e.g., coffee beans stored in the bag 700 may generate gas to expand the bag 700 by breathing.
- Internal pressure of the bag 700 thus increases.
- a channel 131 is formed and the valve 14 disengages from the release member 13 when the internal pressure of the bag 700 is greater than the predetermine pressure.
- gas in the bag 700 may enter the channel 131 via the inlet 11 and finally leave the bag 700 via the outlet 121 as indicated by arrows of FIG. 4D .
- the bag 700 returns to the state of FIG. 4C when the internal pressure of the bag 700 is less than the predetermine pressure.
- the release member 13 In the closed state of the bag 700 , the release member 13 is blocked by the valve 14 , thereby preventing external gas and pollutants from entering the bag 700 .
- FIGS. 6A to 6D a film for gas discharge 600 in accordance with a fourth preferred embodiment of the invention is shown.
- the characteristics of the fourth preferred embodiment are substantially the same as that of the first preferred embodiment except the following:
- the release member 13 is sandwiched by the outer film member 12 and the adhesive 10 which is also partially sandwiched by the outer film member 12 and the inner film member 11 .
- the valve 14 is sandwiched by the release member 13 and the adhesive 10 .
- the inlet 111 is through the inner film member 11 and the adhesive 10 to terminate at the outer film member 12 .
- the outlet 121 is at an end of the release member 13 .
- the inlet 111 of the film for gas discharge 600 corresponds to the release member 13 (or a plurality of release members 13 in other embodiments).
- the release member 13 corresponds to a valve 14 .
- the valve 14 may be shaped as a ring around the inlet 111 in other embodiments.
- the outlet 121 is provided at end of the inner film member 11 or the outer film member 12 . Alternatively, the outlet 121 may be provided on the outer film member 12 .
Abstract
A film for gas discharge includes an inner film member, an outer film member, adhesive for securing the inner and outer film members together, an inlet through the inner film member, an outlet in the adhesive adjacent to ends of the inner and outer film members, a release member between the inlet and the outlet, and a valve on the release member. The valve may close the release member to block a passage from the inlet to the outlet or open the release member to unblock the passage. A bag made from the film for gas discharge is also provided.
Description
- The invention relates to bags and more particularly to a film for gas discharge and a bag made from the films for gas discharge.
- Coffee beans are typically packaged in a bag such as plastic bag. Coffee beans may exhale to accumulate gas in the bag. Thus, the bag may expand and even explode due to gas expansion. Further, the inflated bag may hinder storage or delivery due to increased space. Thus, many inventors have thought how to solve the problem.
- A
conventional bag 90 is shown inFIG. 7 and includes acheck valve 91 for allowing gas in thebag 90 to pass through to expel. External air and pollutants are prevented from entering thebag 90 via thecheck valve 91. - While the
check valve 91 is good in its claimed function, its complicated components, time consuming assembly, and low production hinder its success in the market. - Thus, the need for improvement still exists.
- It is therefore one object of the invention to provide a film for gas discharge comprising an inner film member; an outer film member; adhesive for securing the inner and outer film members together; an inlet disposed through the inner film member; an outlet disposed in the adhesive adjacent to ends of the inner and outer film members; a release member disposed between the inlet and the outlet; and a valve formed of non-adhesive plastic and disposed on the release member; wherein the valve is configured to close the release member to block a passage from the inlet to the outlet or open the release member to unblock the passage.
- Preferably, the outlet is a hole.
- Preferably, the inlet is a hole.
- Preferably, the release member is formed of release agent and disposed between the outer film member and the adhesive.
- Preferably, the release member is formed of release agent and disposed between the inner film member and the adhesive.
- Preferably, the outer film member is formed of polyester, and the inner film member is a stack of aluminum (AL) layer, polyethylene (PE) layer, and hot adhesive layer made of linear low-density polyethylene (LLDPE) or polypropylene (PP).
- Preferably, the outer film member is a stack of polyester layer, polyethylene (PE) layer, and aluminum (AL) layer, and the inner film member is a hot adhesive layer made of linear low-density polyethylene (LLDPE) or polypropylene (PP).
- It is another object of the invention to provide a bag including two films secured together, at least one of the films being a film for gas discharge, the film for gas discharge comprising an inner film member; an outer film member; adhesive for securing the inner and outer film members together; an inlet disposed through the inner film member; an outlet disposed in the adhesive adjacent to ends of the inner and outer film members; a release member disposed between the inlet and the outlet; and a valve formed of non-adhesive plastic and disposed on the release member; wherein the valve is configured to close the release member to block a passage from the inlet to the outlet when an internal pressure of the bag is less than a predetermine pressure or open the release member to unblock the passage when the internal pressure of the bag is greater than the predetermine pressure.
- Preferably, the outlet is a hole.
- Preferably, the inlet is a hole.
- Preferably, the release member is formed of release agent and disposed between the outer film member and the adhesive.
- Preferably, the release member is formed of release agent and disposed between the inner film member and the adhesive.
- Preferably, the outer film member is formed of polyester, and the inner film member is a stack of aluminum (AL) layer, polyethylene (PE) layer, and hot adhesive layer made of linear low-density polyethylene (LLDPE) or polypropylene (PP).
- Preferably, the outer film member is a stack of polyester layer, polyethylene (PE) layer, and aluminum (AL) layer, and the inner film member is a hot adhesive layer made of linear low-density polyethylene (LLDPE) or polypropylene (PP).
- Drawbacks of the conventional art including complicated components, time consuming assembly, and low production are eliminated by the invention.
- The invention has the advantages of being mass produced, no additional assembly, and a bag or part thereof being made from the film for gas discharge.
- The above and other objects, features and advantages of the invention will become apparent from the following detailed description taken with the accompanying drawings.
-
FIG. 1A is an exploded view of a film for gas discharge according to a first preferred embodiment of the invention; -
FIG. 1B is a plan view of the formed film for gas discharge; -
FIG. 1C is a sectional view taken alongline 1C-1C ofFIG. 1B where the valve is closed; -
FIG. 1D is a view similar toFIG. 1C showing a channel formed by the open valve; -
FIG. 1E is a perspective view of the film for gas discharge wound into a roll; -
FIG. 2 is a perspective view of a bag formed by the films for gas discharge; -
FIG. 3 is an exploded view of a film for gas discharge according to a second preferred embodiment of the invention; -
FIG. 4A is an exploded view of a film for gas discharge according to a third preferred embodiment of the invention; -
FIG. 4B is a plan view of the formed film for gas discharge; -
FIG. 4C is a sectional view taken alongline 4C-4C ofFIG. 4B where the valve is closed; -
FIG. 4D is a view similar toFIG. 4C showing a channel formed by the open valve; -
FIG. 4E is a perspective view of the film for gas discharge wound into a roll; -
FIG. 5 is a perspective view of a bag formed by the films for gas discharge; -
FIG. 6A is an exploded view of a film for gas discharge according to a fourth preferred embodiment of the invention; -
FIG. 6B is a plan view of the formed film for gas discharge; -
FIG. 6C is a sectional view taken alongline 6C-6C ofFIG. 6B where the valve is closed; -
FIG. 6D is a view similar toFIG. 6C showing a channel formed by the open valve; -
FIG. 7 is a perspective view of a conventional bag. - Referring to
FIGS. 1A to 1E , a film forgas discharge 100 in accordance with a first preferred embodiment of the invention comprises the following components as discussed in detail below. - An
inner film member 11 and anouter film member 12 are secured together by adhesive 10. The film forgas discharge 100 includes aninlet 111 shaped a circular hole (or a plurality holes in other embodiments), anoutlet 121 at an end of the inner film member 11 (seeFIG. 1C ), arelease member 13 disposed in the adhesive 10 and between theinlet 111 and theoutlet 121, and avalve 14 on therelease member 13 adjacent to theinlet 111. - In the first preferred embodiment, the
release member 13 is made of release agent or any of similar materials. Therelease member 13 is disposed between theinner film member 11 and the adhesive 10. - In the first preferred embodiment, the
outer film member 12 is made of polyester such as polyethylene terephthalate (PET), theinner film member 11 is a stack of aluminum (AL) layer, polyethylene (PE) layer, and hot adhesive layer made of Linear low-density polyethylene (LLDPE) or polypropylene (PP). - In another first preferred embodiment, the
outer film member 12 is a stack of polyester (e.g., PET) layer, PE layer, and AL layer, and theinner film member 11 is a hot adhesive layer made of LLDPE or PP. - In the first preferred embodiment, the film for
gas discharge 100 is produced by a machine and wound into a roll (seeFIG. 1E ). The roll facilitates storage, delivery and mass production. - Referring to
FIG. 2 , abag 200 produced either completely by a plurality of films forgas discharge 100 or by some films forgas discharge 100 and other components is shown. However, the manufacture of thebag 200 is not the subject of the invention and thus a detailed description thereof is omitted herein for the sake of brevity. Only the manufacture of the film forgas discharge 100 is discussed in detail below. - Referring to
FIGS. 1A-1E andFIG. 2 again, theinner film member 11 is an inner layer of thebag 200 and theouter film member 12 is an outer layer (i.e., outer surface) of thebag 200. The film forgas discharge 100 is shaped as that shown inFIG. 1C when internal pressure of thebag 200 is less than a predetermine pressure. Thevalve 14 is closed to block (i.e., close) therelease member 13. Food (e.g., coffee beans) stored in thebag 200 may generate gas to expand thebag 200 by breathing. Internal pressure of thebag 200 thus increases. Achannel 131 is formed and thevalve 14 disengages from therelease member 13 when the internal pressure of thebag 200 is greater than the predetermine pressure. Thus, gas in thebag 200 may enter thechannel 131 via theinlet 11 and finally leave thebag 200 via theoutlet 121 as indicated by arrows ofFIG. 1D . Thebag 200 returns to the state ofFIG. 1C when the internal pressure of thebag 200 is less than the predetermine pressure. In the closed state of thebag 200, therelease member 13 is blocked by thevalve 14, thereby preventing external gas and pollutants from entering thebag 200. In the first preferred embodiment, thevalve 14 is formed of rubber or acrylic. - Referring to
FIGS. 1A to 1E again, theinlet 111 of the film forgas discharge 100 corresponds to the release member 13 (or a plurality ofrelease members 13 in other embodiments). - Referring to
FIG. 3 , a film for gas discharge 300 in accordance with a second preferred embodiment of the invention is shown. The characteristics of the second preferred embodiment are substantially the same as that of the first preferred embodiment except the following: Theinlet 111 of the film for gas discharge 300 corresponds to tworelease members 13 each having avalve 14 and anoutlet 121. Thevalve 14 is shaped as a ring around theinlet 111 and further disposed on therelease members 13. Thevalve 14 is an integral member. - The
outlets 121 of the film for gas discharge 300 are at edges of theinner film member 11 and pressed by theouter film member 12. Alternatively, theoutlets 121 may be provided on theouter film member 12 in other embodiments. - Referring to
FIGS. 4A to 4E , a film forgas discharge 400 in accordance with a third preferred embodiment of the invention is shown. The characteristics of the third preferred embodiment are substantially the same as that of the first preferred embodiment such as theinner film member 11, theouter film member 12, theinlet 111, theoutlet 121, therelease member 13, thevalve 14, and the adhesive 10 except the following: - The
outlet 121 is provided through the adhesive 10 and theouter film member 12. Theoutlet 121 is a through hole and adjacent to therelease member 13. - Referring to
FIG. 5 , abag 700 produced either completely by a plurality of films forgas discharge 400 or by some films forgas discharge 400 and other components is shown. - Referring to
FIGS. 4A-4E andFIG. 5 again, theinner film member 11 is an inner layer of thebag 700 and theouter film member 12 is an outer layer (i.e., outer surface) of thebag 700. In comparison with theoutlet 121 at an edge of theinner film member 11 and pressed by theouter film member 12 ofFIG. 2 , theoutlet 121 is provided through the adhesive 10 and theouter film member 12. The film forgas discharge 400 is shaped as that shown inFIG. 4C when internal pressure of thebag 700 is less than a predetermine pressure. Thevalve 14 is closed to block (i.e., close) therelease member 13. Food (e.g., coffee beans) stored in thebag 700 may generate gas to expand thebag 700 by breathing. Internal pressure of thebag 700 thus increases. Achannel 131 is formed and thevalve 14 disengages from therelease member 13 when the internal pressure of thebag 700 is greater than the predetermine pressure. Thus, gas in thebag 700 may enter thechannel 131 via theinlet 11 and finally leave thebag 700 via theoutlet 121 as indicated by arrows ofFIG. 4D . Thebag 700 returns to the state ofFIG. 4C when the internal pressure of thebag 700 is less than the predetermine pressure. In the closed state of thebag 700, therelease member 13 is blocked by thevalve 14, thereby preventing external gas and pollutants from entering thebag 700. - Referring to
FIGS. 6A to 6D , a film forgas discharge 600 in accordance with a fourth preferred embodiment of the invention is shown. The characteristics of the fourth preferred embodiment are substantially the same as that of the first preferred embodiment except the following: - The
release member 13 is sandwiched by theouter film member 12 and the adhesive 10 which is also partially sandwiched by theouter film member 12 and theinner film member 11. Thevalve 14 is sandwiched by therelease member 13 and the adhesive 10. Theinlet 111 is through theinner film member 11 and the adhesive 10 to terminate at theouter film member 12. Theoutlet 121 is at an end of therelease member 13. Theinlet 111 of the film forgas discharge 600 corresponds to the release member 13 (or a plurality ofrelease members 13 in other embodiments). Therelease member 13 corresponds to avalve 14. Thevalve 14 may be shaped as a ring around theinlet 111 in other embodiments. Theoutlet 121 is provided at end of theinner film member 11 or theouter film member 12. Alternatively, theoutlet 121 may be provided on theouter film member 12. - While the invention has been described in terms of preferred embodiments, those skilled in the art will recognize that the invention can be practiced with modifications within the spirit and scope of the appended claims.
Claims (15)
1. A film for gas discharge of a bag, comprising:
an inner film member;
an outer film member;
adhesive for securing the inner and outer film members together;
an inlet formed on the inner film member;
an outlet formed on the outer film member or between the inner and outer film members and adjacent to edges of the inner and outer film members;
a release member having two distal ends directly connecting with the inlet and the outlet, respectively; and
a valve connected on the release member when an internal pressure of the bag is less than a predetermine pressure, while the valve is not connected on the release member to form a passage between the inlet and the outlet along the release member when the internal pressure of the bag is greater than the predetermine pressure.
2. The film for gas discharge of claim 1 , wherein the outlet is a through hole.
3. The film for gas discharge of claim 1 , wherein the inlet is a through hole formed on the outer film.
4. The film for gas discharge of claim 1 , wherein the release member is formed of release agent and disposed between the outer film member and the adhesive.
5. The film for gas discharge of claim 1 , wherein the release member is formed of release agent and disposed between the inner film member and the adhesive.
6. The film for gas discharge of claim 1 , wherein the outer film member is formed of polyester, and the inner film member is a stack of aluminum (AL) layer, polyethylene (PE) layer, and hot adhesive layer.
7. The film for gas discharge of claim 1 , wherein the outer film member is a stack of polyester layer, polyethylene (PE) layer, and aluminum (AL) layer, and the inner film member is a hot adhesive layer.
8. A bag including two films secured together, at least one of the films being a film for gas discharge, the film for gas discharge comprising:
an inner film member;
an outer film member;
adhesive for securing the inner and outer film members together;
an inlet formed on the inner film member;
an outlet formed on the outer film member or between the inner and outer film members and adjacent to edges of the inner and outer film members;
a release member having two distal ends directly connecting with the inlet and the outlet, respectively; and
a valve connected on the release member when an internal pressure of the bag is less than a predetermine pressure, while the valve is not connected on the release member to form a passage formed between the inlet and the outlet along the release member when the internal pressure of the bag is greater than the predetermine pressure.
9. The bag of claim 8 , wherein the outlet is a through hole.
10. The bag of claim 8 , wherein the inlet is a through hole formed on the outer film.
11. The bag of claim 8 , wherein the release member is formed of release agent and disposed between the outer film member and the adhesive.
12. The bag of claim 8 , wherein the release member is formed of release agent and disposed between the inner film member and the adhesive.
13. The bag of claim 8 , wherein the outer film member is formed of polyester, and the inner film member is a stack of aluminum (AL) layer, polyethylene (PE) layer, and hot adhesive layer.
14. The bag of claim 8 , wherein the outer film member is a stack of polyester layer, polyethylene (PE) layer, and aluminum (AL) layer, and the inner film member is a hot adhesive layer.
15. The bag of claim 8 , wherein the valve formed of a pressure sensitive adhesive.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US15/174,647 US20170349348A1 (en) | 2016-06-06 | 2016-06-06 | Film for gas discharge and bag made from the same |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US15/174,647 US20170349348A1 (en) | 2016-06-06 | 2016-06-06 | Film for gas discharge and bag made from the same |
Publications (1)
Publication Number | Publication Date |
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US20170349348A1 true US20170349348A1 (en) | 2017-12-07 |
Family
ID=60483415
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US15/174,647 Abandoned US20170349348A1 (en) | 2016-06-06 | 2016-06-06 | Film for gas discharge and bag made from the same |
Country Status (1)
Country | Link |
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US (1) | US20170349348A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10783805B2 (en) | 2018-01-15 | 2020-09-22 | LaserSharp FlexPak Services, LLC | Microchannel device for controlling gas, vapor, pressure within a package |
US10781023B2 (en) | 2018-01-15 | 2020-09-22 | LaserSharp FlexPak Services, LLC | Device for controlling gas, vapor, pressure within a package |
CN113790292A (en) * | 2021-09-07 | 2021-12-14 | 苏润燮 | Gas exhaust valve for packaging material |
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US2927722A (en) * | 1954-11-10 | 1960-03-08 | Melvin R Metzger | Vacuum type valve-equipped containers |
US2946502A (en) * | 1954-11-10 | 1960-07-26 | Melvin R Metzger | Valve-equipped containers |
US5209264A (en) * | 1991-07-05 | 1993-05-11 | Yoshihiro Koyanagi | Check valve |
US20040114837A1 (en) * | 2001-04-20 | 2004-06-17 | Yoshihiro Koyanagi | Evacuable bag |
US20040188310A1 (en) * | 2003-03-31 | 2004-09-30 | Peter Hamilton | Ventable storage bag |
US20050175261A1 (en) * | 2004-02-05 | 2005-08-11 | Kashiwara Seitai Co., Ltd. | Check valve and bag having the same |
US20070116385A1 (en) * | 2004-06-29 | 2007-05-24 | The Glad Products Company | Flexible storage bag |
US20140197162A1 (en) * | 2011-07-06 | 2014-07-17 | Joel Haamer | Food package |
US20160340085A1 (en) * | 2015-05-20 | 2016-11-24 | Sonoco Development, Inc. | Flexible laminate structure with integrated one-way valve |
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- 2016-06-06 US US15/174,647 patent/US20170349348A1/en not_active Abandoned
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US2927722A (en) * | 1954-11-10 | 1960-03-08 | Melvin R Metzger | Vacuum type valve-equipped containers |
US2946502A (en) * | 1954-11-10 | 1960-07-26 | Melvin R Metzger | Valve-equipped containers |
US5209264A (en) * | 1991-07-05 | 1993-05-11 | Yoshihiro Koyanagi | Check valve |
US20040114837A1 (en) * | 2001-04-20 | 2004-06-17 | Yoshihiro Koyanagi | Evacuable bag |
US20040188310A1 (en) * | 2003-03-31 | 2004-09-30 | Peter Hamilton | Ventable storage bag |
US20050175261A1 (en) * | 2004-02-05 | 2005-08-11 | Kashiwara Seitai Co., Ltd. | Check valve and bag having the same |
US20070116385A1 (en) * | 2004-06-29 | 2007-05-24 | The Glad Products Company | Flexible storage bag |
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Publication number | Priority date | Publication date | Assignee | Title |
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US10783805B2 (en) | 2018-01-15 | 2020-09-22 | LaserSharp FlexPak Services, LLC | Microchannel device for controlling gas, vapor, pressure within a package |
US10781023B2 (en) | 2018-01-15 | 2020-09-22 | LaserSharp FlexPak Services, LLC | Device for controlling gas, vapor, pressure within a package |
CN113790292A (en) * | 2021-09-07 | 2021-12-14 | 苏润燮 | Gas exhaust valve for packaging material |
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