Method and apparatus for securing the facially confronting oppos

Details Method and apparatus for securing the facially confronting oppos Method and apparatus for securing the facially confronting oppos

1996-03-08

1997-10-28

Sipos, John

Package making

Methods

Closing package or filled receptacle

533744, 53DIG2, 53450, 53451, 53551, B65B 5110

Patent

active

056807473

ABSTRACT:
In a packaging machine through which products are advanced singly and in succession along a wrapping line together with a heat-sealable wrapping film, the film is folded around each product to form a wrapper of tubular appearance with two facially confronting longitudinal edge margins, whereupon the temperature of the edge margins is raised by electromagnetic induction to soften the material in readiness for heat-sealing. The pressure required to fuse the heated confronting edge margins together is applied evenly from two opposite sides.

REFERENCES:
patent: 4288967 (1981-09-01), Seko et al.
patent: 4637199 (1987-01-01), Steck et al.
patent: 4731980 (1988-03-01), Worden et al.
patent: 4819414 (1989-04-01), Worden et al.
patent: 4825625 (1989-05-01), Hufford
patent: 5117613 (1992-06-01), Pfaffmann
patent: 5282349 (1994-02-01), Siegel

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