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| Directly driven microwave oven turntable top |
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| Combination package and sleeve support means |
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| Food material for puffing |
| What is claimed is: 1. A process for preparing a food material for puffing containing 33.02 to 94.55... |
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| Center-supported microwave tray |
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| Anti-rebound latch |
| The present invention is an improvement in anti-rebound mechanisms for circuit breakers having blow-... |
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| Photographic radiation-sensitive materials having improved antistatic property |
| OF THE INVENTION It has been described in, for example, British Patent 861,134 and Japanese Patent ... |
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| Composition of matter that is hard and tough |
| What is claimed is: 1. A composition structure comprising a plurality of thin alterna ting layers ... |
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| Metalized paper or board product and method of preparation |
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| Microwave oven excitation system |
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Pouch
| Details |
Inventors: Ossian, William F.; Wildenberg, Thomas S.; Warmbier, Henry;
Assignee: American Can Company (Greenwich, CT)
Primary Examiner: Lesmes; George F.
Assistant Examiner: Buffalow; E. Rollins
Attorney, Agent or Firm: Auber; Robert P., Dorman; Ira S., Wyatt; Douglas W.
A hermetically sealed pouch, being safe for the storage of foods, avoiding giving a taste to enclosed food, the filled pouch being able to withstand cooking temperatures typically used to cook food. |
|
DETAILED DESCRIPTION OF THE INVENTION FIG.
1 shows a retort pouch having substantially similar front and back walls 22 and 24 sealed together on three edges 26, 28, and 30, and open on the fourth edge to receive food.
Food is placed in the pouch, the fourth edge sealed, and the entire pouch with the food therein is heated or retorted.
The novel laminate structure used for each of the side walls 22 and 24 is shown in FIG.
2.
The inside or sealant lamina is the layer that contacts the food.
The sealant layer 10 is attached by the layer 12 to the primer layer 14 on the aluminum or other metal foil stock 16.
On the outside a biaxially oriented polyester layer 20 is attached by an adhesive 18 to the foil 16.
The layer 20 physically protects the foil from being penetrated or otherwise physically damaged.
The sealing layer 10 contains polypropylene, and it may contain either polyethylene or ethylene vinyl acetate copolymer, or both.
The polyethylene and/or ethylene vinyl acetate copolymer may be used either as a blend or as a copolymer/terpolymer with the polypropylene.
Typically a terpolymer of propylene, ethylene, and vinyl acetate, film grade resin, with a melt flow index of about 10 and having a thickness between 11/2 and 6 mils is used.
The lamina 12 is an extrusion grade polypropylene or polypropylene copolymer or polypropylene polyethylene blend.
One acceptable material is sold under the trade name of Eastman 4G7DP.
The layer 12 is inserted into the laminate as shown in FIG.
3.
A storage tank or hopper 38 contains the pelletized material which is extruded through the extrusion die into a sheet 12.
The sheet 12 is drawn into the nip between the lamina 10 and the cured lamina 14 at a temperature on the order of between 540.
degree.
and 640.
degree.
Fahrenheit.
Either roller 32 or 34 is a temperature controlled roller whose best temperatures are between 155.
degree.
and 160.
degree.
Fahrenheit, although as low as 50.
degree.
Fahrenheit and as high as 250.
degree.
Fahrenheit are acceptable.
The other roller 32 or 34 may be used with or without direct temperature control
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