Package making – Methods – Closing package or filled receptacle
Patent
1997-05-01
1998-07-07
Johnson, Linda
Package making
Methods
Closing package or filled receptacle
53442, 53554, 533735, 533746, 533753, 533723, B65B 5302, B65B 5126, B65B 5132
Patent
active
057750653
ABSTRACT:
Method of and apparatus for cutting and heat sealing a film with a smooth seam which extends substantially the transverse width of a wrapped package utilizes a mechanism having a cool clamping portion and a hot sealing portion which are sequentially actuated. The clamping portion, with segments upstream and downstream of a sealing position, is activated to firmly hold the film against a base plate. The sealing portion is located between the upstream and downstream segments of the clamping portion. The heated sealing portion is brought into contact with the film as a cutting member cuts the film. The sealing head is retracted as the clamping portion holds the film to allow longitudinal film shrinkage and prevent transverse film shrinkage of the film. The clamping portion separates and the next package in a succession of film-enclosed packages is moved downstream of the sealing position.
REFERENCES:
patent: 4574566 (1986-03-01), Eaves et al.
patent: 4630429 (1986-12-01), Christine
patent: 4965985 (1990-10-01), Masubuchi et al.
patent: 5058361 (1991-10-01), Schmacher
patent: 5271210 (1993-12-01), Tolson
patent: 5666788 (1997-09-01), Tolson
patent: 5673534 (1997-10-01), Fowler
Johnson Linda
Ossid Corporation
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