Back seal support for vertical form, fill and seal machine

Details Back seal support for vertical form, fill and seal machine Back seal support for vertical form, fill and seal machine

1998-05-04

1999-11-23

Sipos, John

Package making

Methods

Enclosing contents within progressively formed web means

53551, 533759, B65B 906

Patent

active

059878533

ABSTRACT:
A method and apparatus for use in a vertical form, fill and seal machine to protect the longitudinal back seal. A pair of clamps retains the plastic film against the forming tube on either side of the back seal and on either side of a sealing platen if the platen is used for forming the back seal. The clamps extend for at least the length of the platen, and the clamps are operated together in unison.

REFERENCES:
patent: 2385897 (1945-10-01), Waters
patent: 3538676 (1970-11-01), Runo
patent: 4442656 (1984-04-01), Wylie
patent: 4630429 (1986-12-01), Christine
patent: 4646507 (1987-03-01), Ohlsson et al.
patent: 5067311 (1991-11-01), Andersson
patent: 5505040 (1996-04-01), Janssen et al.

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