Film folding device, method, and product

Details Film folding device, method, and product Film folding device, method, and product

1988-03-31

1989-05-09

Sipos, John

Package making

Methods

Conforming by stretching or shrinking of cover over contents

53464, 53556, 53223, B65B 1118

Patent

active

048276944

ABSTRACT:
Disclosed herein is a machine for wrapping filled trays in thermoplastic film, said machine having a film folding device in which the side folding arms and back folding bar move along linear paths in synchronized motion so that the points of coincidence between the back folding bar and the side folding arms define a curve which approximates a diagonal to the tray being wrapped. This film folding device provides uniquely smooth folds on the bottom of a tray which can be readily heat sealed to produce a relatively leakproof package.

REFERENCES:
patent: 3220160 (1965-11-01), Roberts
patent: 4078363 (1978-03-01), Ranzi
patent: 4548024 (1985-10-01), Fine
patent: 4574564 (1986-03-01), Pester

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