Package making – Methods – With contents treating
Patent
1979-08-10
1981-02-24
McGehee, Travis S.
Package making
Methods
With contents treating
53434, 53512, B65B 3108
Patent
active
042519764
ABSTRACT:
Disclosed herein is a simple and economical process for packing foodstuffs under vacuum in the home in a way compatible with that achieved on a large industrial scale with the use of complex, costly equipment. The process in question comprises, among other things, the following operations: the preparation of a bag, made of flexible heat sealable plastic material having, at one extremity, an open mouth; the insertion into the bag of the product to be preserved under vacuum; the preparation of a spacer member provided with at least one tubular projecting part, the free extremity of which has a cutting edge, while the other extremity communicates with at least one opening directed orthogonally with respect to the said tubular projecting part; the insertion of the spacer member into the inside of the bag, a short distance away from the mouth of this, the tubular projecting part thereof being directed perpendicularly with respect to the plane of the bag; the pressing of one of the walls of the bag against the said tubular projecting part so that the latter may perforate and pass through the said wall of the bag; the carrying out of a linear heat sealing operation on the walls of the bag, in the area in between the spacer member and the mouth of the bag; the extraction of the air contained in the bag via the tubular projecting part of the spacer member; the carrying out of a second linear sheet sealing operation on the walls of the bag, in the area in between the product to be preserved and the spacer member, in a position adjacent to the latter. Furthermore, this invention also relates to a portable apparatus for carrying out linear heat sealing operations on sheets of thermoplastic material and for cutting contiguously to the sealing lines.
REFERENCES:
patent: 3382642 (1968-05-01), Shaw
FIAP s.r.l.
McGehee Travis S.
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