Process for the packaging of products, using a heat treatment, a

Details Process for the packaging of products, using a heat treatment, a Process for the packaging of products, using a heat treatment, a

1986-08-06

1987-09-01

Spruill, Robert L.

Package making

Methods

With contents treating

53425, 53478, 53488, 53432, B65B 6308, B65B 5514

Patent

active

046899367

ABSTRACT:
A container or package filled with perishable food materials is closed by a cover presenting a vent hole and the assembly is subjected to sterilization or pasteurization. Thereafter the vent hole is closed by means of a hot melt having a melting point lower than the highest temperature during sterilization or pasteurization. Preferably the hot melt is applied before sterilization or pasteurization and provided with a perforation joining the vent hole. The hot melt may contain a rounded rigid body not melting at the highest sterilization or pasteurization temperature and being able to seal the vent hole, such as a glass bead.
After cooling the closed container is under a subatmospheric pressure.
The container may be of plastics or glass and the cover may be of plastics or plastic coated metal foil, in such a case the plastic coating has a melting point being higher than the melting point of the hot melt.

REFERENCES:
patent: 2092445 (1937-09-01), Doulgheridis
patent: 2179676 (1939-11-01), Vogt
patent: 2380811 (1945-07-01), Walker
patent: 2997397 (1961-08-01), Doulgheridis
patent: 3435948 (1969-04-01), Kaganov et al.
patent: 3989853 (1976-11-01), Forkner
patent: 4022324 (1977-05-01), Schuster
patent: 4203019 (1980-05-01), Richter et al.

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