US2870954A - Vacuum package - Google Patents
Vacuum package Download PDFInfo
- Publication number
- US2870954A US2870954A US584905A US58490556A US2870954A US 2870954 A US2870954 A US 2870954A US 584905 A US584905 A US 584905A US 58490556 A US58490556 A US 58490556A US 2870954 A US2870954 A US 2870954A
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- US
- United States
- Prior art keywords
- package
- vacuum
- valve piece
- envelope
- sheet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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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
- B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
- B65D81/18—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents providing specific environment for contents, e.g. temperature above or below ambient
- B65D81/20—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents providing specific environment for contents, e.g. temperature above or below ambient under vacuum or superatmospheric pressure, or in a special atmosphere, e.g. of inert gas
- B65D81/2007—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents providing specific environment for contents, e.g. temperature above or below ambient under vacuum or superatmospheric pressure, or in a special atmosphere, e.g. of inert gas under vacuum
- B65D81/2023—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents providing specific environment for contents, e.g. temperature above or below ambient under vacuum or superatmospheric pressure, or in a special atmosphere, e.g. of inert gas under vacuum in a flexible container
-
- 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
- B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
- B65D81/18—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents providing specific environment for contents, e.g. temperature above or below ambient
- B65D81/20—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents providing specific environment for contents, e.g. temperature above or below ambient under vacuum or superatmospheric pressure, or in a special atmosphere, e.g. of inert gas
- B65D81/2007—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents providing specific environment for contents, e.g. temperature above or below ambient under vacuum or superatmospheric pressure, or in a special atmosphere, e.g. of inert gas under vacuum
- B65D81/2038—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents providing specific environment for contents, e.g. temperature above or below ambient under vacuum or superatmospheric pressure, or in a special atmosphere, e.g. of inert gas under vacuum with means for establishing or improving vacuum
Definitions
- the object of the invention is to provide a package, pouch, envelope, or the like made from a flexible packaging material into which is built a very simple and inexpensive valve device which permits a vacuum to be drawn within the package after it has been filled and which will retain the vacuum for an extended period of time.
- This package is especially suitable for vacuum packaging of products subject to deterioration by air, oxygen, molds, bacteria moisture, or light. Some of these products are bacon, luncheon meats, cheeses, coffee, tea, dried milk powders, dried yeast, dehydrated meats, dehydrated soups, dehydrated vegetables, confections, frozen meats, frozen fish and fish products, frozen fruits and vegetables, and many other food items.
- a characteristic of the package is that it may be made from a variety of materials, particularly aluminum foil bearing a heat sealing layer, the valve being made from a single additional layer of the foil or other material and which will lie so fiat with respect to the wall of the package as not to affect its capacity or form in the least.
- Fig. 1 is a perspective view of an envelope package constructed in accordance with the invention, the valve piece lying against the upper wall of the envelope and being shown in dotted line;
- Fig. 2 is a longitudinal section through the structure of Fig. 1, showing somewhat enlarged the manner in which vacuum-action withdraws air from the material within the package;
- Fig. 3 is a view similar to Fig. 1, being taken on line 3-3 (Fig. 1) and showing the package sealed by the valve;
- Fig. 4 is a fragmentary section generally on the line 3-3 (Fig. 1), and enlarged, showing the position of the valve during withdrawal of air from the interior of the envelope;
- Fig. 5 is a perspective view showing the two wrapper sheets of the package, fragmentarily, the upper sheet having applied exteriorly thereto the vacuum sealing valve;
- Fig. 6 is a view similar to Fig. l but showing a boxlike package, the valve piece lying against the upper wall of the overlying wrap;
- Fig. 7 is a longitudinal section through the structure of Fig. 6 showing, somewhat enlarged, the manner in which vacuum action withdraws air from the package and its contents;
- Fig. 8 is a view of the structure shown in Figs. 6 and 7, and in section, showing the package sealed by the valve;
- Fig. 9 is a perspective view of the valve piece.
- a desirable material for the envelope of Fig. l or the wrap for the box-like package shown in Fig. 6 is aluminum foil carrying one of various heat-sealing layers. Inasmuch as such layers fill and seal the pinholes of exceedingly thin aluminum foil, the latter can be used in a very 2,870,954 Patented Jan. 27, 1959 Wide range as to thickness, as, for example, .00035" to .006". However, heat sealing films per so can be used but aluminum foil is preferred. For one reason it is impervious to harmful light rays which accelerate oxida tion.
- Aluminum foil when used, may be strengthened by one or more layers of paper, cellophane, or other suitable reinforcing materials. 1
- Fig. l a sealed envelope which, it will be understood, contains a material for which protection against deterioration is desired.
- the envelope consists of two sheets, 1 and 1x, heat sealed together at their margins.
- Sheet. 1 is formed with a very small perforation at 2 and a valve piece 3 lies over the said perforation at the under side of sheet 1.
- the valve piece is heat sealed at its margins to sheet 1 and is formed with an opening at 4 which is preferably larger than opening 2.
- sheet 1 may have an inner heat sealing layer as at 5 and to which the valve piece 3 may be secured at its margin.
- Figs. 2-4 the contents of the envelope are indicated at 6.
- the valve piece must be as flat and smooth as possible and preferably is of the same material as sheets 1 and 1x. With some stocks, particularly those that have a hard or somewhat uneven surface a mastic compound such as microcrystalline wax can be applied within the margins of the valve piece to enable greater and longer vacuum retention. Of course, this mastic will not be required if the vent in the package is sealed off, as later to be de scribed.
- the envelope When the envelope is filled and heat sealed, being in the condition that its interior is under the same pressure as its exterior it may, along with a suitable number of like envelopes, duly filled, be placed in a vacuum chamber and all of the packages simultaneously evacuated upon an exhaustion of air from the chambers. It will be seen by reference to Figs. 1 and 4 that the air within the envelope and its contents will be drawn out first through aperture 4 of the valve piece and then through aperture 2 of sheet 1. Equilibrium of air pressure in the envelope and the vacuum chambers is very quickly reached, leaving a vacuum in the envelope. At this point air is quickly introduced into the vacuum chamber.
- valve piece is applied to .a unitary wrapping sheet 9 applied over a cardboard box or form retaining member 10, sheet 9 having on its interior. a heat sealing layer 11. Wrapping sheet 9 is applied to form retaining member 10 and its folds and laps of the folds are heat sealed and hermetically so.
- Sheet 9 is provided with a very small opening at 12.
- valve piece 13 Under the opening and heat sealed to sheet 9 is the valve piece 13, the latter being provided with an opening 14.
- the hole in the appropgiate package sheet can be sealed off from the hole in the valve piece by heat sealing a small area around one of the holes,
- valve piece- may be on the .exter r or -i to a vacuum, permitting egress o-f,air,, ,it is preferredthat,
- valve piece bestifiier and also,that, it lie withinthe outerwall and be concealed thereby.
- An' impervious flexible wrapping sheet adapted for the formation of hermetically sealed packages in general, consisting of at least ⁇ one sheet ofaluminum foil and a ye 0 h ea ma e i l carr d, her by; and p suh-I ywu fqfm hickn s rs dis e t h vin g spa rin re n e e d n I m h, t at-s al n yer, .,a d, a 5
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Packages (AREA)
Description
KULESZA VACUUM PACKAGE 2 Sheets s 1 FiledMay 1956 INVENTOR.
Jan. 27, 1959 c. P. KULESZA 2,870,954
VACUUM PACKAGE Filed May 15, 1956 IN V EN TORI United States Patent VACUUM PACKAGE Chester P. Knlesza, Midlothian, Va., assignor to Reynolds Metals Company, Richmond, Va., a corporation of Delaware Application May 15, 1956, Serial No. 584,905
1 Claim. (Cl. 229-625) The object of the invention is to provide a package, pouch, envelope, or the like made from a flexible packaging material into which is built a very simple and inexpensive valve device which permits a vacuum to be drawn within the package after it has been filled and which will retain the vacuum for an extended period of time. This package is especially suitable for vacuum packaging of products subject to deterioration by air, oxygen, molds, bacteria moisture, or light. Some of these products are bacon, luncheon meats, cheeses, coffee, tea, dried milk powders, dried yeast, dehydrated meats, dehydrated soups, dehydrated vegetables, confections, frozen meats, frozen fish and fish products, frozen fruits and vegetables, and many other food items.
A characteristic of the package is that it may be made from a variety of materials, particularly aluminum foil bearing a heat sealing layer, the valve being made from a single additional layer of the foil or other material and which will lie so fiat with respect to the wall of the package as not to affect its capacity or form in the least.
The invention will be described with reference to the accompanying drawings, in which,
Fig. 1 is a perspective view of an envelope package constructed in accordance with the invention, the valve piece lying against the upper wall of the envelope and being shown in dotted line; i
Fig. 2 is a longitudinal section through the structure of Fig. 1, showing somewhat enlarged the manner in which vacuum-action withdraws air from the material within the package;
Fig. 3 is a view similar to Fig. 1, being taken on line 3-3 (Fig. 1) and showing the package sealed by the valve;
Fig. 4 is a fragmentary section generally on the line 3-3 (Fig. 1), and enlarged, showing the position of the valve during withdrawal of air from the interior of the envelope;
Fig. 5 is a perspective view showing the two wrapper sheets of the package, fragmentarily, the upper sheet having applied exteriorly thereto the vacuum sealing valve;
Fig. 6 is a view similar to Fig. l but showing a boxlike package, the valve piece lying against the upper wall of the overlying wrap;
Fig. 7 is a longitudinal section through the structure of Fig. 6 showing, somewhat enlarged, the manner in which vacuum action withdraws air from the package and its contents;
Fig. 8 is a view of the structure shown in Figs. 6 and 7, and in section, showing the package sealed by the valve; and
Fig. 9 is a perspective view of the valve piece.
A desirable material for the envelope of Fig. l or the wrap for the box-like package shown in Fig. 6 is aluminum foil carrying one of various heat-sealing layers. Inasmuch as such layers fill and seal the pinholes of exceedingly thin aluminum foil, the latter can be used in a very 2,870,954 Patented Jan. 27, 1959 Wide range as to thickness, as, for example, .00035" to .006". However, heat sealing films per so can be used but aluminum foil is preferred. For one reason it is impervious to harmful light rays which accelerate oxida tion. Aluminum foil, when used, may be strengthened by one or more layers of paper, cellophane, or other suitable reinforcing materials. 1
Referring to the drawings, I have shown in Fig. l a sealed envelope which, it will be understood, contains a material for which protection against deterioration is desired. The envelope consists of two sheets, 1 and 1x, heat sealed together at their margins. Sheet. 1 is formed with a very small perforation at 2 and a valve piece 3 lies over the said perforation at the under side of sheet 1. The valve piece is heat sealed at its margins to sheet 1 and is formed with an opening at 4 which is preferably larger than opening 2. As shown in Fig. 2 sheet 1 may have an inner heat sealing layer as at 5 and to which the valve piece 3 may be secured at its margin. In Figs. 2-4 the contents of the envelope are indicated at 6.
The valve piece must be as flat and smooth as possible and preferably is of the same material as sheets 1 and 1x. With some stocks, particularly those that have a hard or somewhat uneven surface a mastic compound such as microcrystalline wax can be applied within the margins of the valve piece to enable greater and longer vacuum retention. Of course, this mastic will not be required if the vent in the package is sealed off, as later to be de scribed.
When the envelope is filled and heat sealed, being in the condition that its interior is under the same pressure as its exterior it may, along with a suitable number of like envelopes, duly filled, be placed in a vacuum chamber and all of the packages simultaneously evacuated upon an exhaustion of air from the chambers. It will be seen by reference to Figs. 1 and 4 that the air within the envelope and its contents will be drawn out first through aperture 4 of the valve piece and then through aperture 2 of sheet 1. Equilibrium of air pressure in the envelope and the vacuum chambers is very quickly reached, leaving a vacuum in the envelope. At this point air is quickly introduced into the vacuum chamber. The atmospheric pressure forces the walls of the envelope against the package product, and at the same time the atmospheric pressure forces the valve piece of the pouch closed and seated, sealing the package for maintaining vacuum therein for a long period of time. Thus in the use of an envelope wall-material of aluminum foil hav- .ing a heat sealing layer which also serves as a plastic abutment, my package has been found to retain the vacuum for as long as one year, without heat sealing the area between the valve openings, andthis has been found true whether the package material is flat or is irregular.
In the structure of Figs. 6-8 the valve piece is applied to .a unitary wrapping sheet 9 applied over a cardboard box or form retaining member 10, sheet 9 having on its interior. a heat sealing layer 11. Wrapping sheet 9 is applied to form retaining member 10 and its folds and laps of the folds are heat sealed and hermetically so.
Under the opening and heat sealed to sheet 9 is the valve piece 13, the latter being provided with an opening 14.
When the package of Fig. 6 is filled and the wrap 9 applied and hermetically sealed at its folds and laps of its folds, the treatment thereof in a vacuum chamber will be the same as above described with reference to the package envelope, the application of vacuum in the chamber acting upon the valve piece in the manner shown in Fig. 7 and the sudden introduction of air into the chamber sealing the valve piece as indicated in Fig. 8.
If desired and after the packaging is completed by the vacuum chamber action, the hole in the appropgiate package sheet can be sealed off from the hole in the valve piece by heat sealing a small area around one of the holes,
or. by heat sealing, across the valve piece intermediate, they holes. The valve piece-may be on the .exter r or -i to a vacuum, permitting egress o-f,air,, ,it is preferredthat,
the valve piece bestifiier and also,that, it lie withinthe outerwall and be concealed thereby.
What is claimed is An' impervious flexible wrapping sheetadapted for the formation of hermetically sealed packages in general, consisting of at least {one sheet ofaluminum foil and a ye 0 h ea ma e i l carr d, her by; and p suh-I ywu fqfm hickn s rs dis e t h vin g spa rin re n e e d n I m h, t at-s al n yer, .,a d, a 5
relatively stifi valve piece -'{facing,said heat'sealinglayeg d valve p e n p fi i perv u m@t fl1.. ,811.u. to the aluminum foil sheet by said heat sealing material at least along the periphery of the valve piece, leaving an intermediate area unsealed, said intermediate area being opposite the opening in the foil, and said valve piece having an opening spaced from the opening in the foil and within the unsealed intermediate area of the valve piece, the valve piece having a stifinessgreatenthan the flexible wrapping sheet per se.
References-Cited in theme of this patent UNITED STATES PATENTS
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US584905A US2870954A (en) | 1956-05-15 | 1956-05-15 | Vacuum package |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US584905A US2870954A (en) | 1956-05-15 | 1956-05-15 | Vacuum package |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2870954A true US2870954A (en) | 1959-01-27 |
Family
ID=24339259
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US584905A Expired - Lifetime US2870954A (en) | 1956-05-15 | 1956-05-15 | Vacuum package |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US2870954A (en) |
Cited By (113)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3003682A (en) * | 1959-05-01 | 1961-10-10 | Roger P Mattson | Material mixing bags |
| US3012895A (en) * | 1958-11-07 | 1961-12-12 | Mitchel R Stelnicki | Food package |
| US3061165A (en) * | 1960-09-01 | 1962-10-30 | Racine Ind Plant Inc | Lined container package |
| US3074798A (en) * | 1959-03-25 | 1963-01-22 | Charles E Palmer | Method of packaging meat |
| US3086693A (en) * | 1958-06-11 | 1963-04-23 | Continental Can Co | Vacuum pack bag and sealing package therefor |
| US3102676A (en) * | 1960-02-16 | 1963-09-03 | Montedison Spa | Self-closing containers |
| DE1185466B (en) * | 1961-08-11 | 1965-01-14 | Windmoeller & Hoelscher | Plastic valve sack and method and device for its manufacture |
| US3193180A (en) * | 1961-08-03 | 1965-07-06 | Lissner Hans | Container of flexible material and in the shape of a sack, pouch, bladder or bag, particularly valved sack, and method of closing the same |
| US3197119A (en) * | 1963-07-02 | 1965-07-27 | Bemis Bro Bag Co | Bags |
| US3207420A (en) * | 1964-05-19 | 1965-09-21 | Octaviano D Navarrete-Kindelan | Container |
| DE1201749B (en) * | 1959-10-08 | 1965-09-23 | Ucb Union Chemique Chemische B | Packing bag made of thermoplastic material with a filling valve |
| US3209804A (en) * | 1961-04-28 | 1965-10-05 | British Visqueen Ltd | Valved bags |
| US3214082A (en) * | 1961-10-13 | 1965-10-26 | Polymer Ind Chimiche S P A | Self-closing containers and method of their manufacture |
| DE1205000B (en) * | 1961-11-24 | 1965-11-11 | Bischof & Klein | Flat valve bag made of thermoplastic material |
| DE1207858B (en) * | 1961-09-07 | 1965-12-23 | Erich Schmidt | Closure on a packaging for solid, especially for piece goods |
| US3233815A (en) * | 1963-02-28 | 1966-02-08 | Nat Dairy Prod Corp | Packaging |
| DE1211065B (en) * | 1960-02-16 | 1966-02-17 | Montedison Spa | Sack, pouch or the like with a valve for automatic filling and closing and a method for its production |
| US3245195A (en) * | 1959-02-16 | 1966-04-12 | Evacuated Insulation Res Ltd | Method of producing heat insulating panels |
| DE1238385B (en) * | 1962-09-05 | 1967-04-06 | Lissner & Co Geb | Preferably made of plastic sack-shaped or bag-shaped containers with ventilation holes |
| US3360382A (en) * | 1965-12-27 | 1967-12-26 | Scientific Atlanta | Method of packaging meat |
| US3370405A (en) * | 1964-12-18 | 1968-02-27 | Studley Paper Company Inc | Vacuum cleaner filter bags and method of manufacturing same |
| US3421302A (en) * | 1966-08-29 | 1969-01-14 | Outboard Marine Corp | Lawn mower grass catching bag |
| DE1287426B (en) * | 1964-12-21 | 1969-01-16 | Bemis Co Inc | Bags with vents and method of making the same |
| DE1293075B (en) * | 1961-02-21 | 1969-04-17 | Natro Cellulosa S P A | Plastic valve sack or pouch |
| DE1297531B (en) * | 1963-11-30 | 1969-06-12 | Psg Plastik Sack Gmbh | Plastic valve bag |
| US3541752A (en) * | 1968-06-07 | 1970-11-24 | Irving Ness | Packaging of compressible goods |
| DE1586778B1 (en) * | 1967-10-27 | 1971-10-07 | Fritz Dr Linder | Bacteria-proof, sealable plastic bag to hold items to be sterilized |
| US4000846A (en) * | 1975-06-30 | 1977-01-04 | Dunkin' Donuts Incorporated | Pressure relief valve and bag incorporating same |
| US4042170A (en) * | 1975-05-06 | 1977-08-16 | Ab Svenska Dental Instrument | Sterile package |
| US4134535A (en) * | 1976-06-04 | 1979-01-16 | Hag Aktiengesellschaft | Pressure relief valve for packing containers |
| US4296862A (en) * | 1979-08-27 | 1981-10-27 | Armentrout James L | Devious path bacterial barrier |
| US4449243A (en) * | 1981-09-10 | 1984-05-15 | Cafes Collet | Vacuum package bag |
| USRE31890E (en) * | 1977-01-25 | 1985-05-21 | Freezing mould bag | |
| US4550546A (en) * | 1982-09-27 | 1985-11-05 | Ethyl Corporation | Sterilizable perforated packaging material |
| US4576283A (en) * | 1983-01-25 | 1986-03-18 | Bernard Fafournoux | Bag for vacuum packaging of articles |
| US4591055A (en) * | 1985-07-24 | 1986-05-27 | Corn Ronald J | Vacuum package for transit |
| FR2578816A1 (en) * | 1985-03-13 | 1986-09-19 | Dunlop Ltd | WATERPROOF PACKAGING |
| US4744199A (en) * | 1985-02-12 | 1988-05-17 | Fgl Projects Limited | Vacuum packaging |
| WO1988007479A1 (en) * | 1987-03-21 | 1988-10-06 | Robert Bosch Gmbh | Packaging receptacle with gas outlet vent |
| US5228271A (en) * | 1992-05-28 | 1993-07-20 | Medivators, Inc. | Method and apparatus for compacting soft goods |
| USRE34929E (en) * | 1985-09-23 | 1995-05-09 | Tilia, Inc. | Plastic bag for vacuum sealing |
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| US5540646A (en) * | 1993-04-21 | 1996-07-30 | W. R. Grace & Co.-Conn. | Method of making a shrinkable bag with protective patch |
| WO1996030199A1 (en) * | 1995-03-29 | 1996-10-03 | Compac International, Inc. | Method and apparatus for making a muschroom spawn bag |
| US5598684A (en) * | 1993-05-04 | 1997-02-04 | Sara Lee/De N.V. | Vacuum package, method and apparatus for making such vacuum package filled with granular material |
| US5747082A (en) * | 1990-09-05 | 1998-05-05 | Weyerhaeuser Co | Package for perishable food and horticultural products |
| US5868244A (en) * | 1997-12-01 | 1999-02-09 | Ethicon, Inc. | Microbial barrier vented package for sterile medical devices and method of packaging |
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| US20060131328A1 (en) * | 2004-12-22 | 2006-06-22 | Brent Anderson | One way valve and container |
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| US7131250B2 (en) | 2002-10-04 | 2006-11-07 | Jcs/Thg, Llp | Appliance for vacuum sealing food containers |
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| WO2007006060A1 (en) * | 2005-07-08 | 2007-01-18 | Starlinger & Co Gesellschaft M.B.H. | Ventilatable bag |
| US20070025648A1 (en) * | 2005-07-27 | 2007-02-01 | Kenneth Micnerski | Collapsible bag for dispensing liquids and method |
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