CA1183499A - Process for sealing a filled container - Google Patents
Process for sealing a filled containerInfo
- Publication number
- CA1183499A CA1183499A CA000395585A CA395585A CA1183499A CA 1183499 A CA1183499 A CA 1183499A CA 000395585 A CA000395585 A CA 000395585A CA 395585 A CA395585 A CA 395585A CA 1183499 A CA1183499 A CA 1183499A
- Authority
- CA
- Canada
- Prior art keywords
- container
- headspace
- membrane
- gas
- sealing
- 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
Links
Classifications
-
- 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
-
- 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
- B65B7/00—Closing containers or receptacles after filling
- B65B7/16—Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons
- B65B7/168—Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons by applying and securing double closures
-
- 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
- B65B31/006—Adding fluids for preventing deformation of filled and closed containers or wrappers
Abstract
Abstract Sealing Process A process for sealing a thermoplastic based food container characterised in that after filling, the container is sealed by an intermediate membrane made of a microporous plastic gas-breathable material, gas is extracted from the headspace through the membrane and afterwards the container is sealed by a final barrier membrane.
Description
3~
Sealin~ Process The present invention relates to a process for sealing ther-moplastic food containers in which the headspace oxygen is removed or reduced.
At the present time there are a number of factors which limit the use of thermoplastic containers in the processed food industry. For example, the shelf life of ambient tempe-rature stored food products in thermoplastic co~tainers is currently limited by the oxidative degradation attributed to oxygen either permeating through the body of the container or emanating from the headspace gas. In the majority of cases the headspace oxygen is the most ss.gnificant cause of the oxidative degradation because the volume of the headspace exceeds the volume of gas permeating through the container during normal periods of storage. This is parti.cularly so in the case of small containers where the headspace represents a large percentage of the total volume of the container.
There are several commonly used methods for eliminating head ~o space oxygen such as vacuum closing and gas flushing but these are generally slow and inefficient. Initially the headspace is evacuated, usually inside a chamber larger than the food contalner ~50 that the container can be sealed with a diaphragm whilst still within the vacuum chamber. In the case of gas flushed containers, the whole chamber has to be flushed to atmospheric pressure before sealing can take place and con-sequently more gas is used than is necessary to fill the headspace: thls process is theref:ore rather 510w and expen-sive because of the high gas consumption.
In the case of applications where hot filling is required it is impossible to use the vacuum closing method because of the boiling which occurs at the reduced pressure and which causes subsequent contamination of the seal area. Therefore in hot filling applications, it is necessary to use the con-~3~
tinuous ~as flusning process which uses even more gas and is ~enerally lessefficient.
We hcve found, surprisingly, that by using a microporous plastic gas-breathable membrane as an intermediate lidding material before the finRl sealing of the container, gases can be extracted from the headspace without contamination of the seal area by the food product ~nd without the necessity of carrying out wasteful ~as flushin~ procedures.
Accordingly, the present invention provides a process for sealing a thermoplastic based food container which comprises sealing the container after fillin~, by an intermediate membrane made of micrsporous plastic ~as-breathable material, extracting gas from the headspace through the inte~nediate membrane by mechanically deforming the intermediate membrane into the headspace and afterwards sealing the container by a final barrier membrane.
P~eferably the container is sealed by the intermediate membrane immediately after filling.
If desired, after gas has been extracted from the headspace, inert gas may be flushed bac~ to atmospheric pressure to the original headspace volume before the final barrier membrane is sealed to the container. The inert gas is a gas which has no detrimental effect on the food product and contains ~0 substantially no oxygen, and is preferably nitrogen or carbon dioxide. Both the intermediate membrane and the final barrier membrane may be sealed to the container by conventional means, for example by usin~ a sealing head fitted with a sealing tool.
~3~
~he container and th~ intermediate microporous membrane may be made of a variety of plastics materials, for example polyolefins, vinyl polymers, polyamides or poly-esters. The polyolefins may be homopolymers, copolymers or filled, for example, filled polyethylene or filled polypropylene. The container and the intermediate micro-porous membrane may be made of dissimilar materials and, in such cases, the lntermediate membrane may be provided with patterned heat seal coatings; for example, the con-tainer may be made of polyester and the intermediatemicroporous membrane may be made of polypropylene coated in the seal areas with a heat seal lacquer.
Desirably the intermediate microporous membrane is elastic which helps to prevent panelling o~ the container.
The porosity to air at atmospheric pressure of the intermediate membrane may be from 6 to 2'500 cc/min, preferably from 200 to 2'000 cc/min and especially from 1'000 to 2'000 cc/min. ~he pore diameter may be up to 6 rn~ and preferably from 2 to 5 m~.
The process of the present invention may be used in the followlncJ applications:
1) Coll-filled non-processed contalners;
Sealin~ Process The present invention relates to a process for sealing ther-moplastic food containers in which the headspace oxygen is removed or reduced.
At the present time there are a number of factors which limit the use of thermoplastic containers in the processed food industry. For example, the shelf life of ambient tempe-rature stored food products in thermoplastic co~tainers is currently limited by the oxidative degradation attributed to oxygen either permeating through the body of the container or emanating from the headspace gas. In the majority of cases the headspace oxygen is the most ss.gnificant cause of the oxidative degradation because the volume of the headspace exceeds the volume of gas permeating through the container during normal periods of storage. This is parti.cularly so in the case of small containers where the headspace represents a large percentage of the total volume of the container.
There are several commonly used methods for eliminating head ~o space oxygen such as vacuum closing and gas flushing but these are generally slow and inefficient. Initially the headspace is evacuated, usually inside a chamber larger than the food contalner ~50 that the container can be sealed with a diaphragm whilst still within the vacuum chamber. In the case of gas flushed containers, the whole chamber has to be flushed to atmospheric pressure before sealing can take place and con-sequently more gas is used than is necessary to fill the headspace: thls process is theref:ore rather 510w and expen-sive because of the high gas consumption.
In the case of applications where hot filling is required it is impossible to use the vacuum closing method because of the boiling which occurs at the reduced pressure and which causes subsequent contamination of the seal area. Therefore in hot filling applications, it is necessary to use the con-~3~
tinuous ~as flusning process which uses even more gas and is ~enerally lessefficient.
We hcve found, surprisingly, that by using a microporous plastic gas-breathable membrane as an intermediate lidding material before the finRl sealing of the container, gases can be extracted from the headspace without contamination of the seal area by the food product ~nd without the necessity of carrying out wasteful ~as flushin~ procedures.
Accordingly, the present invention provides a process for sealing a thermoplastic based food container which comprises sealing the container after fillin~, by an intermediate membrane made of micrsporous plastic ~as-breathable material, extracting gas from the headspace through the inte~nediate membrane by mechanically deforming the intermediate membrane into the headspace and afterwards sealing the container by a final barrier membrane.
P~eferably the container is sealed by the intermediate membrane immediately after filling.
If desired, after gas has been extracted from the headspace, inert gas may be flushed bac~ to atmospheric pressure to the original headspace volume before the final barrier membrane is sealed to the container. The inert gas is a gas which has no detrimental effect on the food product and contains ~0 substantially no oxygen, and is preferably nitrogen or carbon dioxide. Both the intermediate membrane and the final barrier membrane may be sealed to the container by conventional means, for example by usin~ a sealing head fitted with a sealing tool.
~3~
~he container and th~ intermediate microporous membrane may be made of a variety of plastics materials, for example polyolefins, vinyl polymers, polyamides or poly-esters. The polyolefins may be homopolymers, copolymers or filled, for example, filled polyethylene or filled polypropylene. The container and the intermediate micro-porous membrane may be made of dissimilar materials and, in such cases, the lntermediate membrane may be provided with patterned heat seal coatings; for example, the con-tainer may be made of polyester and the intermediatemicroporous membrane may be made of polypropylene coated in the seal areas with a heat seal lacquer.
Desirably the intermediate microporous membrane is elastic which helps to prevent panelling o~ the container.
The porosity to air at atmospheric pressure of the intermediate membrane may be from 6 to 2'500 cc/min, preferably from 200 to 2'000 cc/min and especially from 1'000 to 2'000 cc/min. ~he pore diameter may be up to 6 rn~ and preferably from 2 to 5 m~.
The process of the present invention may be used in the followlncJ applications:
1) Coll-filled non-processed contalners;
2) Hot-fllled containers with OX without subsequent pas-teu-risation;
3) Cold~ or hot-filled heat-processed containers.
~0 When the product is subjec~ed to a heat-processin~ ~reatment, this is carried out after the container has been sealed by the intermediate membrane, the porosity of which prevents excesslve inflation of the container without the need for over-pressure.
~3~
The gas may be extracted from the headspace either by mecha-nically deforming the in~ermediate membrane in-to the head-space, -thereby forcing the gas out through the membrane or by vacuum suction. If desired, both mechanical aeXor-mation of the membrane and vacuum suction may be usedsimultaneously to extract the gas.
The interrnediate membrane permits the extraction of gases from the headspace without the risk of the product being sucked out of the container. If desired, removal of the headspace gas may take place up to the point where the in-termediate membrane is in contact with the product.
soth the vacuum suction and the gas flush may be carried out lS by means of a suction head positioned over the container preferably with the outer rim of the head located on the container rim. This ensures a quicker and more effi-cient extraction and gas flush than wlth a conventional chamber machine.
After the extraction of gas from the headspace and, if desired, reflushing to atmospheric pressure with inert gas, the final barrier membrane is sealed to the container. This may be a conventional membrane, for example, one made of a foil lamina-te. In the cases where the contalner is gas flushe~, the final appearance is si-milar to conventlonal containers, that is, with a flat foil diaphragm seal, but in the cases where sealing takes place irnmediately after ex-traction oE the gas, the container has a dl~hed or recessed appearance.
3~
The cycle ~ime of the process depends on such factors as the film porosity, the headspace volume, the extrac-tion technique and the size of the container bu~ is usually from 1 to 10 seconds.
The process of the present invention may be used on many types of container for example~ polypropylene based thermoplastic pots, tubs or trays, polypropylene coated containers, foil alutray or plastic can type containers. The cross-section of the container may be one of several shapes~for example round, rectangular or oval. Food produc~s contained in the thermoplastic containers sealed in accordance with the present inven-tion have an im~roved shelf life compared with conventional containers.
The present invention will now be further described by way of example with reference to the accompanying drawings in which:
Figure 1 is a sectional view of a filled container and the lower part of the first sealing head, Flgure 2 ls a sectional view of a filled container and a second head before descent, FlcJure 3 ls a sectional view of a filled container and the second head after descent, Figure 4 i5 a sectional view of a filled container and a second head located on the container rim, Figure 5 is a sectional view of a filled container and the lower part of a third head after descent, . Figure 6 is a sectional view of a filled container and a second head with its outer rim located on the container rim and Figure 7 is a sectional view of a filled container with the lower part of a third head after descent.
One embodiment of this invention will now be described with reference to Figures 1 to 3.
A thermopla~tic based container 1 with a rim 2 comprises a food product 3, an intermediate microporous polypropylene membrane 4 and a headspace 5. A first head 6 is fitted with a sealing tool 7. A second head 8 comprises an inner piston 9, a sealing tool 10, channels 11 and at it~ lower end a pre-cut ~ormed foil membrane 12.
In operation, the container 1 is initially positioned beneath the first head 6 where the intermediate microporous polypro-pylene membrane 4 is sealed to the rim 2 in the conventional manner by the sealing tool 7 to confer the normal volume of 2S headspace 5. A~terwards the fir~t head 6 is removed and the container is brought into position beneath the second head 8 which hold~ the pre-cut formed foil cliaphragm 12 at its lower end by means o~ vacuum suction through channels 11, wh~eupon the inner piston 9 descend~ to deform the interm~-dlate membrane 4 and in so dolng, forces out the headspacega~ untll the men~rane touches the food product 3. The foil membrane 12 is then sealed to the rim 2 of the container 1 by means of sealing tool 10 while sti.ll in conkact with the intermediate membrane 4.
~3~
A second Qmbodiment of this inven-tion will now be described with referenc~ to Figures 1, 4 and 5.
A thermoplastic based container 1 with a rim 2 comprises a food product 3, an intermediate micrcporous polypropylene membrane 4 and a headspace 5. A first head 6 is fitted with a sealing tool 7. A second head 13 is fitted with a riyid porous mesh 14, a relief valve 15 and a channel 16 to which is fitted a gas inlet pipe 17 with a tap 18.
A second foil membrane 19 lies on top of the container 1 beneath a third head 20 fitted with a sealing tool 21.
In operation, the container 1 is initially positioned beneath the first head 6 wherè the intermediate microporous polypro-pylene membrane 4 is sealed to the rim 2 in the conventional manner by the sealing tool.7 to confer the normal volume of headspace 5. Afterwards the first head is removed and the container 1 is moved to the second head 13 which is brought i~to a position where it is located on the rim 2 and the ri-gid porous mesh 14 lies immediately above the intermediate membrane 4. The gas is then extracted from the headspace by vacuum suction through the relief valve 15 and during this opexation the location o the head 13 on the container rim 2 restricts the suction to the area i~nediately above the contai.ner 1~ In addition the rigid porous mesh 14 permits the flow o~ the headspace gas but re~tricts the expansion of the intermediate membrane 4 during the vacuum suction.
A~ter tha gas has been extrac~ed rom the headspace, the 3~ t~p 1~ is opened and nltrogen flushes into the pipe 17 -through the channel 16 and enters the headspace 5, initially under vacuum but afterwards under pressure to improve the 1ushing e~ficiency, until the normal headspace volume is attained. Finally the tap 18 is closed and the container 1 is moved to the third head 20 which descends to seal the second ~3~
,~
foil membrane 1~ to the rim 2 by means of the sealing tool 21.
A third embodiment of this invention will now be described with reference to Figures 1, 6 and 7.
A thermoplastic based container 1 with a rim 2 comprises a food product 3, an intermediate microporous polypropylene membrane 4 and a headspace 5. A first head 6 is fitted with a sealing tool 7. A second head 22 comprises an inner piston 23, a sealing tool 24 and channels 25. A second pre-formed foil membrane 26 lies on top of the container 1 beneath a third head 27 fitted with a sealing tool 28.
In operation, the container 1 is initially positioned beneath the irst head 6 where the intermediate microporous polypro-pylene membrane 4 is sealed to the rim 2 in the conventional manner by the sealing tool 7 to confer the normal volume of headspace 5. Afterwards the first head is removed and the container is moved to the second head 22 which is brought in-to a position so that it is located on the rim 2. The gas is extracted rom the headspace ~y vacuum suction through the channels 25 and ~imultaneously the inner piStQn 23 descends to de~orm the intermediate membrane 4 until it touches the ~5 ~ood product 3. Durlng kh:Ls op~ration the locatlon of the head 22 on the container rim 2 restricts the suction to the area immediately above the Gontainer. A~ter the gas has been ex-~racted from the headspace, nitrogen i~ injected through the chann~ls 25 -to return the ~ystem to atmospheric pre~sure.
Finally ~he container is moved to the third head 27 which descends to seal the second pre-formed foil membrane 26 to the rim 2 by means of the sealing tool 28.
~0 When the product is subjec~ed to a heat-processin~ ~reatment, this is carried out after the container has been sealed by the intermediate membrane, the porosity of which prevents excesslve inflation of the container without the need for over-pressure.
~3~
The gas may be extracted from the headspace either by mecha-nically deforming the in~ermediate membrane in-to the head-space, -thereby forcing the gas out through the membrane or by vacuum suction. If desired, both mechanical aeXor-mation of the membrane and vacuum suction may be usedsimultaneously to extract the gas.
The interrnediate membrane permits the extraction of gases from the headspace without the risk of the product being sucked out of the container. If desired, removal of the headspace gas may take place up to the point where the in-termediate membrane is in contact with the product.
soth the vacuum suction and the gas flush may be carried out lS by means of a suction head positioned over the container preferably with the outer rim of the head located on the container rim. This ensures a quicker and more effi-cient extraction and gas flush than wlth a conventional chamber machine.
After the extraction of gas from the headspace and, if desired, reflushing to atmospheric pressure with inert gas, the final barrier membrane is sealed to the container. This may be a conventional membrane, for example, one made of a foil lamina-te. In the cases where the contalner is gas flushe~, the final appearance is si-milar to conventlonal containers, that is, with a flat foil diaphragm seal, but in the cases where sealing takes place irnmediately after ex-traction oE the gas, the container has a dl~hed or recessed appearance.
3~
The cycle ~ime of the process depends on such factors as the film porosity, the headspace volume, the extrac-tion technique and the size of the container bu~ is usually from 1 to 10 seconds.
The process of the present invention may be used on many types of container for example~ polypropylene based thermoplastic pots, tubs or trays, polypropylene coated containers, foil alutray or plastic can type containers. The cross-section of the container may be one of several shapes~for example round, rectangular or oval. Food produc~s contained in the thermoplastic containers sealed in accordance with the present inven-tion have an im~roved shelf life compared with conventional containers.
The present invention will now be further described by way of example with reference to the accompanying drawings in which:
Figure 1 is a sectional view of a filled container and the lower part of the first sealing head, Flgure 2 ls a sectional view of a filled container and a second head before descent, FlcJure 3 ls a sectional view of a filled container and the second head after descent, Figure 4 i5 a sectional view of a filled container and a second head located on the container rim, Figure 5 is a sectional view of a filled container and the lower part of a third head after descent, . Figure 6 is a sectional view of a filled container and a second head with its outer rim located on the container rim and Figure 7 is a sectional view of a filled container with the lower part of a third head after descent.
One embodiment of this invention will now be described with reference to Figures 1 to 3.
A thermopla~tic based container 1 with a rim 2 comprises a food product 3, an intermediate microporous polypropylene membrane 4 and a headspace 5. A first head 6 is fitted with a sealing tool 7. A second head 8 comprises an inner piston 9, a sealing tool 10, channels 11 and at it~ lower end a pre-cut ~ormed foil membrane 12.
In operation, the container 1 is initially positioned beneath the first head 6 where the intermediate microporous polypro-pylene membrane 4 is sealed to the rim 2 in the conventional manner by the sealing tool 7 to confer the normal volume of 2S headspace 5. A~terwards the fir~t head 6 is removed and the container is brought into position beneath the second head 8 which hold~ the pre-cut formed foil cliaphragm 12 at its lower end by means o~ vacuum suction through channels 11, wh~eupon the inner piston 9 descend~ to deform the interm~-dlate membrane 4 and in so dolng, forces out the headspacega~ untll the men~rane touches the food product 3. The foil membrane 12 is then sealed to the rim 2 of the container 1 by means of sealing tool 10 while sti.ll in conkact with the intermediate membrane 4.
~3~
A second Qmbodiment of this inven-tion will now be described with referenc~ to Figures 1, 4 and 5.
A thermoplastic based container 1 with a rim 2 comprises a food product 3, an intermediate micrcporous polypropylene membrane 4 and a headspace 5. A first head 6 is fitted with a sealing tool 7. A second head 13 is fitted with a riyid porous mesh 14, a relief valve 15 and a channel 16 to which is fitted a gas inlet pipe 17 with a tap 18.
A second foil membrane 19 lies on top of the container 1 beneath a third head 20 fitted with a sealing tool 21.
In operation, the container 1 is initially positioned beneath the first head 6 wherè the intermediate microporous polypro-pylene membrane 4 is sealed to the rim 2 in the conventional manner by the sealing tool.7 to confer the normal volume of headspace 5. Afterwards the first head is removed and the container 1 is moved to the second head 13 which is brought i~to a position where it is located on the rim 2 and the ri-gid porous mesh 14 lies immediately above the intermediate membrane 4. The gas is then extracted from the headspace by vacuum suction through the relief valve 15 and during this opexation the location o the head 13 on the container rim 2 restricts the suction to the area i~nediately above the contai.ner 1~ In addition the rigid porous mesh 14 permits the flow o~ the headspace gas but re~tricts the expansion of the intermediate membrane 4 during the vacuum suction.
A~ter tha gas has been extrac~ed rom the headspace, the 3~ t~p 1~ is opened and nltrogen flushes into the pipe 17 -through the channel 16 and enters the headspace 5, initially under vacuum but afterwards under pressure to improve the 1ushing e~ficiency, until the normal headspace volume is attained. Finally the tap 18 is closed and the container 1 is moved to the third head 20 which descends to seal the second ~3~
,~
foil membrane 1~ to the rim 2 by means of the sealing tool 21.
A third embodiment of this invention will now be described with reference to Figures 1, 6 and 7.
A thermoplastic based container 1 with a rim 2 comprises a food product 3, an intermediate microporous polypropylene membrane 4 and a headspace 5. A first head 6 is fitted with a sealing tool 7. A second head 22 comprises an inner piston 23, a sealing tool 24 and channels 25. A second pre-formed foil membrane 26 lies on top of the container 1 beneath a third head 27 fitted with a sealing tool 28.
In operation, the container 1 is initially positioned beneath the irst head 6 where the intermediate microporous polypro-pylene membrane 4 is sealed to the rim 2 in the conventional manner by the sealing tool 7 to confer the normal volume of headspace 5. Afterwards the first head is removed and the container is moved to the second head 22 which is brought in-to a position so that it is located on the rim 2. The gas is extracted rom the headspace ~y vacuum suction through the channels 25 and ~imultaneously the inner piStQn 23 descends to de~orm the intermediate membrane 4 until it touches the ~5 ~ood product 3. Durlng kh:Ls op~ration the locatlon of the head 22 on the container rim 2 restricts the suction to the area immediately above the Gontainer. A~ter the gas has been ex-~racted from the headspace, nitrogen i~ injected through the chann~ls 25 -to return the ~ystem to atmospheric pre~sure.
Finally ~he container is moved to the third head 27 which descends to seal the second pre-formed foil membrane 26 to the rim 2 by means of the sealing tool 28.
Claims (6)
IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A process for sealing a thermoplastic based food container which comprises sealing the container after filling, by an intermediate membrane made of microporous plastic gas-breathable material, extracting gas from the headspace through the intermediate membrane by mechanically deforming the intermediate membrane into the headspace and afterwards sealing the container by a final barrier membrane.
2. A process according to claim 1 characterised in that after the gas has been extracted from the headspace and before the container is sealed by the final barrier membrane, inert gas is flushed back to atmospheric pressure to confer the original headspace volume.
3. A process according to claim 2 characterised in that the intermediate membrane is made of polypropylene.
4. A process according to claim 3 characterised in that the porosity to air of the intermediate membrane is from 1'000 cc/min to 2'000 cc/min.
5. A process according to claim 4 characterised in that the gas is extracted from the headspace by both mechanically deforming the intermediate membrane into the headspace and simultaneously using vacuum suction.
6. A process according to claim 4 or 5 characterised in that the vacuum suction and the gas flush are carried out by means of a suction head positioned over the container with the outer rim of the head located on the container rim.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8106326 | 1981-02-27 | ||
| GB8106326 | 1981-02-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1183499A true CA1183499A (en) | 1985-03-05 |
Family
ID=10520041
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000395585A Expired CA1183499A (en) | 1981-02-27 | 1982-02-04 | Process for sealing a filled container |
Country Status (17)
| Country | Link |
|---|---|
| US (1) | US4513015A (en) |
| EP (1) | EP0059299B1 (en) |
| JP (1) | JPS57163613A (en) |
| KR (1) | KR880000087B1 (en) |
| AR (1) | AR225872A1 (en) |
| AT (1) | ATE8482T1 (en) |
| AU (1) | AU546135B2 (en) |
| CA (1) | CA1183499A (en) |
| DE (1) | DE3260375D1 (en) |
| ES (1) | ES8307640A1 (en) |
| GB (1) | GB2104049B (en) |
| IE (1) | IE52762B1 (en) |
| MX (1) | MX158431A (en) |
| MY (1) | MY8600344A (en) |
| PH (1) | PH23513A (en) |
| SG (1) | SG83185G (en) |
| ZA (1) | ZA82800B (en) |
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| US4627336A (en) * | 1985-09-25 | 1986-12-09 | Nam Kang H | Apparauts for storage of perishables |
| US4684025A (en) * | 1986-01-30 | 1987-08-04 | The Procter & Gamble Company | Shaped thermoformed flexible film container for granular products and method and apparatus for making the same |
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| WO1988005402A1 (en) * | 1987-01-16 | 1988-07-28 | Toyo Seikan Kaisha, Ltd. | Production of hermetically sealed container |
| US4919955A (en) * | 1987-09-08 | 1990-04-24 | Mitchell Jerry L | Method for packaging perishable products |
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| US4910032A (en) * | 1988-11-16 | 1990-03-20 | Hercules Incorporated | Water-permeable controlled atmosphere packaging device from cellophane and microporous film |
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| DE69424871T2 (en) | 1993-08-27 | 2000-10-05 | Pillsbury Co | MECHANICAL GAS PURIFIER |
| AUPM738494A0 (en) * | 1994-08-10 | 1994-09-01 | Quality Capital Management Limited | Alcoholic beverage container |
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| US6013293A (en) * | 1997-09-10 | 2000-01-11 | Landec Corporation | Packing respiring biological materials with atmosphere control member |
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| US6548132B1 (en) | 1998-07-23 | 2003-04-15 | Landec Corporation | Packaging biological materials |
| ES2194509T3 (en) * | 1999-09-10 | 2003-11-16 | Nestle Sa | METHOD FOR THE PRODUCTION OF A CLOSED CONTAINER CONTAINER FOR PRODUCTS COOKED IN OVEN OR SIMILAR. |
| CA2401646A1 (en) | 2000-03-02 | 2001-09-07 | Tempra Technology Inc. | Vacuum packaging aid |
| US7601374B2 (en) | 2000-09-26 | 2009-10-13 | Landec Corporation | Packaging of respiring biological materials |
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-
1981
- 1981-08-20 GB GB08106326A patent/GB2104049B/en not_active Expired
-
1982
- 1982-01-07 EP EP82100064A patent/EP0059299B1/en not_active Expired
- 1982-01-07 AT AT82100064T patent/ATE8482T1/en active
- 1982-01-07 DE DE8282100064T patent/DE3260375D1/en not_active Expired
- 1982-01-19 KR KR8200204A patent/KR880000087B1/en active
- 1982-02-02 MX MX191230A patent/MX158431A/en unknown
- 1982-02-03 IE IE236/82A patent/IE52762B1/en not_active IP Right Cessation
- 1982-02-04 CA CA000395585A patent/CA1183499A/en not_active Expired
- 1982-02-08 ZA ZA82800A patent/ZA82800B/en unknown
- 1982-02-09 US US06/347,110 patent/US4513015A/en not_active Expired - Fee Related
- 1982-02-09 PH PH26836A patent/PH23513A/en unknown
- 1982-02-09 AU AU80291/82A patent/AU546135B2/en not_active Ceased
- 1982-02-23 AR AR288520A patent/AR225872A1/en active
- 1982-02-26 ES ES509923A patent/ES8307640A1/en not_active Expired
- 1982-02-26 JP JP57030483A patent/JPS57163613A/en active Granted
-
1985
- 1985-11-02 SG SG831/85A patent/SG83185G/en unknown
-
1986
- 1986-12-30 MY MY344/86A patent/MY8600344A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| MX158431A (en) | 1989-01-11 |
| MY8600344A (en) | 1986-12-31 |
| ZA82800B (en) | 1982-12-29 |
| JPS624296B2 (en) | 1987-01-29 |
| ES509923A0 (en) | 1983-08-16 |
| AU546135B2 (en) | 1985-08-15 |
| ATE8482T1 (en) | 1984-08-15 |
| AU8029182A (en) | 1983-09-01 |
| PH23513A (en) | 1989-08-16 |
| IE820236L (en) | 1982-08-27 |
| GB2104049B (en) | 1985-06-19 |
| KR830008893A (en) | 1983-12-16 |
| ES8307640A1 (en) | 1983-08-16 |
| US4513015A (en) | 1985-04-23 |
| IE52762B1 (en) | 1988-02-17 |
| JPS57163613A (en) | 1982-10-07 |
| EP0059299A1 (en) | 1982-09-08 |
| KR880000087B1 (en) | 1988-02-23 |
| DE3260375D1 (en) | 1984-08-23 |
| GB2104049A (en) | 1983-03-02 |
| SG83185G (en) | 1986-07-18 |
| AR225872A1 (en) | 1982-04-30 |
| EP0059299B1 (en) | 1984-07-18 |
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