WO2005012107A2 - Resealable vacuum packaging bags and methods for using and manufacturing resealable vacuum packaging bags - Google Patents
Resealable vacuum packaging bags and methods for using and manufacturing resealable vacuum packaging bags Download PDFInfo
- Publication number
- WO2005012107A2 WO2005012107A2 PCT/US2004/023359 US2004023359W WO2005012107A2 WO 2005012107 A2 WO2005012107 A2 WO 2005012107A2 US 2004023359 W US2004023359 W US 2004023359W WO 2005012107 A2 WO2005012107 A2 WO 2005012107A2
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- WO
- WIPO (PCT)
- Prior art keywords
- panel
- vacuum packaging
- packaging bag
- bag
- edge
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B31/00—Packaging articles or materials under special atmospheric or gaseous conditions; Adding propellants to aerosol containers
- B65B31/04—Evacuating, pressurising or gasifying filled containers or wrappers by means of nozzles through which air or other gas, e.g. an inert gas, is withdrawn or supplied
- B65B31/046—Evacuating, pressurising or gasifying filled containers or wrappers by means of nozzles through which air or other gas, e.g. an inert gas, is withdrawn or supplied the nozzles co-operating, or being combined, with a device for opening or closing the container or wrapper
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- 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
- B65D31/16—Bags or like containers made of paper and having structural provision for thickness of contents of special shape
-
- 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
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- 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
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B31/00—Packaging articles or materials under special atmospheric or gaseous conditions; Adding propellants to aerosol containers
- B65B31/02—Filling, closing, or filling and closing, containers or wrappers in chambers maintained under vacuum or superatmospheric pressure or containing a special atmosphere, e.g. of inert gas
- B65B31/024—Filling, closing, or filling and closing, containers or wrappers in chambers maintained under vacuum or superatmospheric pressure or containing a special atmosphere, e.g. of inert gas specially adapted for wrappers or bags
Definitions
- the present invention generally relates to vacuum packaging. More particularly, the invention is directed to resealable vacuum packaging bags and methods for using and manufacturing resealable vacuum packaging bags.
- Vacuum packaging involves removing air or other gases from a storage container and then sealing the container to prevent the contents from being exposed to the air.
- Vacuum packaging is particularly useful in protecting food and other perishables against oxidation. Oxygen is a main cause of food spoilage and contributes to the growth of bacteria, mold, and yeast. Accordingly, vacuum packaged food often lasts three to five times longer than food stored in ordinary containers. Moreover, vacuum packaging is useful for storing clothes, photographs, silver, and other items to prevent discoloration, corrosion, rust, and tarnishing. Furthermore, vacuum packaging produces tight, strong, and compact packages, reducing the bulk of articles and allowing for more space to store other supplies.
- FIGS 1A and 1B are schematic isometric views of a conventional appliance 10 for vacuum packaging an object 2 (shown in broken lines) in accordance with the prior art.
- the vacuum packaging appliance 10 includes a base 20, a lid 40 pivotably coupled to the base 20, a lower trough 26, an upper trough (not shown) aligned with the lower trough 26, and a vacuum pump (not shown) operably coupled to the upper trough.
- the lid 40 pivots between an open position (shown in Figure 1 B), in which a bag 60 can be placed between the lid 40 and the base 20, and a closed position (shown in Figure 1A), in which the bag 60 can be evacuated and thermally sealed.
- the upper trough and the lower trough 26 form a vacuum chamber to remove gas from the interior of the bag 60.
- the base 20 also includes a seal 24 surrounding the vacuum chamber to seal the chamber from ambient air while gas is removed from the interior of the bag 60.
- the vacuum packaging appliance 10 further includes a heating element 28 to thermally seal the bag 60 after the gas has been evacuated.
- a vacuum packaging appliance of this type is disclosed in U.S. Patent No. 4,941 ,310, which is hereby incorporated by reference in its entirety.
- Conventional vacuum packaging bags include two panels attached together with an open end. Typically, the panels each include two or more layers.
- the inner layer can be a heat sealable material
- the outer layer can be a gas impermeable material to provide a barrier against the influx of air.
- the plasticity temperature of the inner layer is lower than the outer layer. Accordingly, the bag can be heated to thermally bond the inner layer of each panel together to seal the bag without melting or puncturing the outer layer.
- a vacuum packaging bag of this type is disclosed in U.S. Patent No. Re. 34,929, which is hereby incorporated by reference in its entirety.
- a conventional vacuum packaging process includes depositing the object 2 in the bag 60 and positioning an open end 62 of the bag 60 in the lower trough 26 of the vacuum packaging appliance 10. Next, the lid 40 pivots downward to form the vacuum chamber with the open end 62 of the bag 60 disposed within the vacuum chamber.
- the vacuum pump then removes gas from the vacuum chamber and the interior of the bag 60, which is in fluid communication with the vacuum chamber.
- the heating element 28 heats a strip of the bag 60 proximate to the open end 62 to melt the inner layer of each panel and thermally seal the bag 60.
- thermally sealed bags cannot be resealed and reopened numerous times. More specifically, a thermally sealed bag is opened by cutting the bag below the seal. The bag can be subsequently resealed; however, each time the bag is reopened, another portion of the bag is cut off. Accordingly, there is a need to improve the process of sealing vacuum packaging bags.
- Figures 1A and 1B are schematic isometric views of a conventional appliance for vacuum packaging objects in accordance with the prior art.
- Figure 2 is a schematic isometric view of a vacuum packaging system including a resealable vacuum packaging bag and a vacuum packaging appliance in accordance with one embodiment of the invention.
- Figure 3 is a schematic isometric view of the vacuum packaging bag of Figure 2.
- Figure 4 is an enlarged schematic cross-sectional side view of a portion of the vacuum packaging bag of Figure 2 with a first panel and a second panel pressed together.
- Figure 5 is a schematic cross-sectional side view of a portion of the vacuum packaging bag of Figure 2 including a first mating member and a second mating member.
- Figure 6 is a schematic top plan view of the vacuum packaging bag of Figure 2.
- Figure 7 is a flow diagram illustrating one method of sealing, opening, and resealing the vacuum packaging bag of Figure 2.
- Figure 8 is a top plan view of a resealable vacuum packaging bag in accordance with another embodiment of the invention.
- Figure 9 is a schematic cross-sectional side view of a portion of the bag of Figure 8 taken generally along the line 9-9.
- a bag includes a first panel and a second panel coupled to the first panel.
- the first and second panels each have a gas impermeable layer and a heat sealable layer.
- the bag further includes a first mating member projecting from the first panel and a second mating member projecting from the first or second panel.
- the second mating member is configured to selectively engage the first mating member to substantially seal the bag.
- the first mating member includes a rib and the second mating member includes a channel sized to removably receive the rib.
- the first and second mating members can extend across the entire width of the bag.
- a vacuum packaging bag includes a first panel, a second panel coupled to the first panel, a first complementary member coupled to the first panel, and a second complementary member coupled to the second panel.
- the first and second panels define an interior region with an open end.
- the first and second panels each include a gas impermeable layer and a heat sealable layer coupled to the gas impermeable layer.
- the heat sealable layer of the first panel is configured to be thermally bonded to the heat sealable layer of the second panel across a heat seal zone to substantially hermetically seal the interior region.
- the heat seal zone is disposed between the open end and the first and second complementary members.
- the first complementary member is configured to selectively engage the second complementary member to substantially seal the interior region.
- Another aspect of the invention is directed to methods of using resealable vacuum packaging bags.
- a method includes opening a thermally sealed vacuum packaging bag and engaging a first complementary member on a first panel of the bag with a second complementary member on a second panel of the bag to substantially seal the vacuum packaging bag. In one aspect of this embodiment, the method further includes opening the vacuum packaging bag by disengaging the first and second complementary members after engaging the first and second complementary members. Another aspect of the invention is directed to methods for manufacturing resealable vacuum packaging bags.
- a method includes forming first and second panels, each including a gas impermeable layer and a heat sealable layer coupled to the gas impermeable layer. The method further includes forming a first mating member on the first panel and forming a second mating member on the first or second panel. The second mating member is configured to selectively engage the first mating member to substantially seal the bag.
- FIG. 2 is a schematic isometric view of a vacuum packaging system 100 including a vacuum packaging appliance 110 and a resealable vacuum packaging bag
- the vacuum packaging appliance 110 includes a base 120 and a lid 140 pivotably coupled to the base 120.
- the lid 140 is movable between an open position (shown in Figure 2) and a closed position.
- the base 120 includes a first chamber portion 126 and a first seal 124 surrounding the first chamber portion 126.
- the lid 140 can include a second chamber portion 146 and a second seal 144 surrounding the second chamber portion 146.
- the first and second chamber portions 126 and 146 form a vacuum chamber.
- the vacuum packaging appliance 110 can have other configurations.
- the base 120 and/or the lid 140 might not include a chamber portion and/or a seal.
- the vacuum packaging appliance 110 may be lidless.
- the vacuum packaging appliance 110 further includes a vacuum pump (not shown) operably coupled to the first and/or second chamber portion 126 or 146 to remove gas from the vacuum chamber when the lid 140 is in the closed position.
- the vacuum pump can also remove gas from the interior of the bag 160 when an open end 162 of the bag 160 is positioned in the vacuum chamber.
- the bag 160 is configured so that the interior of the bag 160 is in fluid communication with the vacuum chamber when the lid 140 is in the closed position, as described in greater detail below with reference to Figure 4. Accordingly, the vacuum pump can remove gas from the vacuum chamber and the interior of the bag 160.
- the vacuum packaging appliance 110 further includes a heating element 128 and a member 150 for pressing the bag 160 against the heating element 128.
- the heating element 128 can be carried by the base 120, and the member 150 can be carried by and project from the lid 140.
- the heating element 128 is configured to thermally seal the bag 160 after the gas has been substantially evacuated from the interior of the bag 160.
- the heating element 128 heats the bag 160 and the member 150 presses the bag 160 against the heating element 128 to ensure a seal is formed across the bag 160, as described in greater detail below with reference to Figure 7.
- Figure 3 is a schematic isometric view of the resealable vacuum packaging bag 160 of Figure 2.
- the bag 160 includes a first panel 164 and a second panel 174 coupled to the first panel 164.
- the first panel 164 can include a first edge 168a, a second edge 168b, a third edge 168c opposite the first edge 168a, and a fourth edge 168d opposite the second edge 168b.
- the second panel 174 can include a first edge 178a, a second edge 178b, a third edge 178c opposite the first edge 178a, and a fourth edge 178d opposite the second edge 178b.
- the first edge 168a, the second edge 168b, and the third edge 168c of the first panel 164 are attached to the first edge 178a, the second edge 178b, and the third edge 178c, respectively, of the second panel 174.
- the first and second panels 164 and 174 define an interior region 184 into which an object(s) can be placed.
- the illustrated resealable vacuum packaging bag 160 further includes a first mating member 190 (shown in Figure 5) projecting from the first panel 164 and a second mating member 195 projecting from the second panel 174.
- the first and second mating members 190 and 195 are aligned and configured to selectively engage each other to at least substantially hermetically seal the interior region 184 of the bag 160, as described in greater detail below with reference to Figures 5 and 6.
- the first and second mating members 190 and 195 can be attached to the first and second panels 164 and 174, respectively, or the first and second mating members 190 and 195 can be integral portions of the corresponding first and second panels 164 and 174. In other embodiments, such as those described below with reference to Figures 8 and 9, both of the first and second mating members 190 and 195 can be attached to one of the first or second panels 164 or 174.
- Figure 4 is an enlarged schematic cross-sectional side view of a portion of the resealable vacuum packaging bag 160 with the first and second panels 164 and 174 pressed together.
- the first and second panels 164 and 174 each include a gas impermeable layer 180 (identified individually as 180a-b) and a heat sealable layer 182 (identified individually as 182a-b) coupled to the corresponding gas impermeable layer 180.
- the gas impermeable layers 180a-b provide a barrier against the influx of air.
- the heat sealable layers 182a-b have a different temperature of plasticity than the gas impermeable layers 180a-b so that the bag 160 can be heated to bond the heat sealable layers 182a-b together without melting or puncturing the gas impermeable layers 180a-b.
- the first and second panels 164 and 174 can further include an additional layer(s), such as a structural layer to increase the strength and rigidity of the bag 160.
- the second panel 174 includes a plurality of intercommunicating channels 175 configured to exhaust gas from the interior of the bag 160 when the first and second panels 164 and 174 are pressed together as shown in Figure 4.
- FIG. 5 is a schematic cross-sectional side view of a portion of the resealable vacuum packaging bag 160 including the first mating member 190 and the second mating member 195.
- the first mating member 190 includes a base portion 191 and a rib 192 projecting from the base portion 191.
- the base portion 191 can be attached to the heat sealable layer 182a of the first panel 164 or be an integral part of the heat sealable layer 182a.
- the second mating member 195 includes a base portion 196 and two spaced-apart ribs 198a-b projecting from the base portion 196.
- the ribs 198a-b form a channel 197 sized to receive the rib 192 of the first mating member 190.
- the bag 160 is sealed by exerting a force F against the first panel 164 to cause the first mating member 190 to engage the second mating member 195. More specifically, the rib 192 moves into the channel 197 and thereby prevents ambient gas from entering the interior region 184 of the bag 160.
- the first and second mating members 190 and 195 can be sized and configured to remain removably engaged until an external force is applied to the bag 160 to disengage the first and second mating members 190 and 195.
- the first and second mating members 190 and 195 can have other shapes and/or configurations.
- the first mating member 190 can include three spaced-apart ribs with two channels sized and configured to receive the ribs 198a-b of the second mating member 195.
- the first and second mating members 190 and 195 can include a configuration similar to the sealing mechanism on zipper bags or Ziploc ® bags.
- Figure 6 is a schematic top plan view of the resealable vacuum packaging bag 160 with the object 2 disposed in the bag 160.
- the illustrated bag 160 has a generally rectangular configuration with a width W and a length L.
- the width W can be greater than or less than the length L of the bag 160.
- the first mating member 190 extends across the width W of the bag 160 from the first edge 168a to the third edge 168c of the first panel 164
- the second mating member 195 extends across the width W of the bag 160 from the first edge 178a to the third edge 178c of the second panel 174. Accordingly, when the first and second mating members 190 and 195 engage each other, they form a seal across the open end 162 of the bag 160.
- Figure 7 is a flow diagram illustrating one method of sealing, opening, and resealing the vacuum packaging bag 160.
- the object 2 to be vacuum packaged is deposited in the interior region 184 of the bag 160.
- the open end 162 of the bag 160 is positioned in the first chamber portion 126 of the base 120 and the lid 140 is closed to form the vacuum chamber around the open end 162 of the bag 160.
- the vacuum packaging appliance 110 evacuates gas from the interior region 184 of the bag 160 through the channels 175 ( Figure 4).
- the heating element 128 heats a heat seal zone 186 of the bag 160 to bond the heat sealable layers 182a-b together to at least substantially hermetically seal the interior region 184 of the bag 160.
- the heat seal zone 186 extends from the first edges 168a and 178a to the third edges 168c and 178c and is located between the first and second mating members 190 and 195 and the fourth edges 168d and 178d.
- the bag 160 and the object 2 can be stored.
- the bag 160 is cut along a line A ⁇ between the first and second mating members 190 and 195 and the heat seal zone 186 to open the bag 160 and access the object 2.
- the bag 160 can be subsequently resealed and reopened by engaging and disengaging the first and second mating members 190 and 195, as described above with reference to Figure 5.
- the bag can have a first open end and a second open end opposite the first open end. The first open end of the bag can be thermally sealed with the vacuum packaging appliance 110.
- the first and second mating members can be positioned proximate to the second open end to selectively seal the second open end of the bag.
- One feature of the resealable vacuum packaging bag 160 of the illustrated embodiment is that the bag 160 can be resealed and reopened repeatedly without consuming and/or damaging the bag 160.
- An advantage of this feature is that the life of the bag 160 is significantly extended, and accordingly, the cost associated with replacing the bag 160 is reduced.
- Prior art vacuum packaging bags do not include integral mating members, and accordingly, the bags must be resealed thermally. Each time a prior art bag is thermally sealed, the bag must be cut to be opened. Cutting damages and consumes a portion of the bag, and therefore, thermally sealed prior art bags have a limited life and must be replaced frequently.
- FIG. 8 is a top plan view of a resealable vacuum packaging bag 360 in accordance with another embodiment of the invention.
- the illustrated bag 360 includes a first panel 364, a second panel 374 coupled to the first panel 364, an interior region 384 between the first and second panels 364 and 374, and an open end 362.
- the first panel 364 includes a first edge 368a and a second edge 368b opposite the first edge 368a
- the second panel 374 includes a first edge 378a and a second edge 378b opposite the first edge 378a.
- the first and second panels 364 and 374 can be thermally sealed across a heat seal zone 386 to hermetically seal the interior region 384 of the bag 360.
- the heat seal zone 386 can be proximate to the open end 362 and extend from the first edges 368a and 378a to the second edges 368b and 378b. In other embodiments, the heat seal zone 386 can have other shapes and/or orientations.
- the first panel 364 further includes an opening 361 through which the interior region 384 of the bag 360 can be accessed. The opening 361 can be selectively closed to at least substantially seal the bag 360, as described in greater detail below with reference to Figure 9.
- the opening 361 extends between the first edge 368a and the second edge 368b and is proximate to the heat seal zone 386. In other embodiments, the opening 361 can have other sizes and/or orientations.
- Figure 9 is a schematic cross-sectional side view of a portion of the bag 360 of Figure 8 taken generally along the line 9-9.
- the first panel 364 includes a first portion 364a and a second portion 364b spaced apart from the first portion 364a.
- the bag 360 further includes a first mating member 390 coupled to the first portion 364a and a second mating member 395 coupled to the second portion 364b.
- the first and second mating members 390 and 395 are sized and configured to selectively engage each other to close the opening 361 and seal the interior region 384 of the bag 360.
- the first mating member 390 includes a base portion 391 and a rib 392 projecting from the base portion 391.
- the second mating member 395 includes a base portion 396 and two spaced- apart ribs 398 (identified individually as 398a-b) projecting from the base portion 396.
- the ribs 398a-b define a channel 397 sized and configured to removably receive the rib 392 of the first mating member 390.
- the rib 392 of the first mating member 390 includes a neck 393 and a head 394 projecting from the neck 393.
- the neck 393 can have a width W.
- the head 394 can have a width W 2 greater than the width W., of the neck 393.
- the ribs 398 of the second mating member 395 can also include corresponding heads 399 (identified individually as 399a-b) spaced apart by a distance approximately equal to the width ⁇ N ⁇ of the neck 393.
- the ribs 398a-b of the second mating member 395 can be made of a flexible material to allow the head 394 of the first mating member 390 to move between the heads 399a-b and into or out of the channel 397.
- the first and second mating members 390 and 395 remain engaged until an external force is applied to disengage them.
- the first and second mating members 390 and 395 can have other configurations to selectively seal the interior region 384 of the bag 360.
- the resealable vacuum packaging bag 360 of the illustrated embodiment can be evacuated, thermally sealed, and subsequently opened and resealed repeatedly by engaging and disengaging the first and second mating members 390 and 395.
- the bag 360 is opened by exerting a force in a direction S on the first portion 364a to disengage the first and second mating members 390 and 395 and separate the first portion 364a from the second portion 364b. Once the first and second mating members 390 and 395 are disengaged and the first portion 364a is separated from the second portion 364b (as shown in broken lines), the interior region 384 of the bag 360 can be accessed through the opening 361 to place objects into or remove objects from the bag 360. The bag 360 can be subsequently closed and sealed by engaging the first and second mating members 390 and 395.
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04778732A EP1723037A2 (en) | 2003-07-31 | 2004-07-21 | Resealable vacuum packaging bags and methods for using and manufacturing resealable vacuum packaging bags |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
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US49172203P | 2003-07-31 | 2003-07-31 | |
US60/491,722 | 2003-07-31 | ||
US10/884,020 US20050022472A1 (en) | 2003-07-31 | 2004-07-02 | Resealable vacuum packaging bags and methods for using and manufacturing resealable vacuum packaging bags |
US10/884,020 | 2004-07-02 |
Publications (2)
Publication Number | Publication Date |
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WO2005012107A2 true WO2005012107A2 (en) | 2005-02-10 |
WO2005012107A3 WO2005012107A3 (en) | 2005-03-24 |
Family
ID=34108039
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2004/023359 WO2005012107A2 (en) | 2003-07-31 | 2004-07-21 | Resealable vacuum packaging bags and methods for using and manufacturing resealable vacuum packaging bags |
Country Status (4)
Country | Link |
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US (1) | US20050022472A1 (en) |
EP (1) | EP1723037A2 (en) |
KR (1) | KR20060024365A (en) |
WO (1) | WO2005012107A2 (en) |
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-
2004
- 2004-07-02 US US10/884,020 patent/US20050022472A1/en not_active Abandoned
- 2004-07-21 KR KR1020057020244A patent/KR20060024365A/en not_active Application Discontinuation
- 2004-07-21 WO PCT/US2004/023359 patent/WO2005012107A2/en not_active Application Discontinuation
- 2004-07-21 EP EP04778732A patent/EP1723037A2/en not_active Withdrawn
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US4545177A (en) * | 1979-09-14 | 1985-10-08 | W. R. Grace & Co., Cryovac Div. | Packing process and apparatus |
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Also Published As
Publication number | Publication date |
---|---|
WO2005012107A3 (en) | 2005-03-24 |
EP1723037A2 (en) | 2006-11-22 |
KR20060024365A (en) | 2006-03-16 |
US20050022472A1 (en) | 2005-02-03 |
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