Method and apparatus to maintain the characteristics of a thermo

Details Method and apparatus to maintain the characteristics of a thermo Method and apparatus to maintain the characteristics of a thermo

1995-10-12

1997-08-05

Johnson, Linda

Package making

Methods

Conforming by stretching or shrinking of cover over contents

53556, 53141, B65B 5300

Patent

active

056530935

ABSTRACT:
The film, which is cyclically extended in the station for wrapping the product, is acted on by a jet of hot air supplied from a therm-electric generator controlled by a control logic unit which through suitable sensors measures the ambient temperature and the temperature of the film and controls any other inputs, so that the film is kept in optimal and substantially constant conditions to react without tearing to the pre-stretching and/or stretching to which it is normally subjected in the product packaging cycle.

REFERENCES:
patent: 3848393 (1974-11-01), Monoghan
patent: 4051643 (1977-10-01), Saito
patent: 4465450 (1984-08-01), Dermansky
patent: 4541225 (1985-09-01), Byland
patent: 4616474 (1986-10-01), Morley et al.
patent: 4757451 (1988-07-01), Denda
patent: 5029430 (1991-07-01), Davis
patent: 5115620 (1992-05-01), Takamura

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