Fill tube spreader

Details Fill tube spreader Fill tube spreader

1989-07-17

1991-01-22

Spruill, Robert L.

Package making

Methods

Enclosing contents within progressively formed web means

53552, B65B 908, B65B 920

Patent

active

049860542

ABSTRACT:
A method and apparatus for forming bags, such as from a continuous sheet of thermoplastic film fed forwardly and wrapped over a forming tube with the contents being filled into the bag through the tube and the end of the film formed into a bag tube being cross-sealed. The lower end of the filling tube is constructed so as to elastically deform and spread as sealing members move in laterally and thereby spread and flatten the tube to insure the making of a seal which is devoid to wrinkles and leakage possibilities.

REFERENCES:
patent: 3470672 (1969-10-01), Tuma
patent: 3538676 (1970-11-01), Runo et al.
patent: 3681890 (1972-08-01), Pringle et al.
patent: 3681892 (1972-08-01), Safranski
patent: 3779836 (1973-12-01), Henry et al.
patent: 3815317 (1974-06-01), Toss
patent: 4127976 (1978-12-01), Jablonski et al.
patent: 4129976 (1978-12-01), Grundler et al.
patent: 4355494 (1982-10-01), Tilman
patent: 4633654 (1987-01-01), Sato et al.

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