Process and apparatus for wrapping articles with stretchable fil

Details Process and apparatus for wrapping articles with stretchable fil Process and apparatus for wrapping articles with stretchable fil

1994-10-18

1997-02-18

Johnson, Linda

Package making

Methods

Conforming by stretching or shrinking of cover over contents

53466, 53556, 53228, 53 66, B65B 5300

Patent

active

056031980

ABSTRACT:
A stretchable film is used whose width is substantially equal to that of the bottom of an article of the largest format which can be processed by the packaging machine. The film is characterized by considerable stretchability and a low elastic memory when stretched. The portion of film cyclically introduced into the wrapping station is normally subjected to longitudinal pre-stretching which has the function of decreasing the width of the film, and the extent of this pre-stretching is variable according to the dimensions of the article to be wrapped, so that the portion of film has a width proportionate to the corresponding dimension of the article to be wrapped.

REFERENCES:
patent: 3967433 (1976-07-01), Bonfiglioli
patent: 4429514 (1984-02-01), Lancaster et al.
patent: 4505092 (1985-03-01), Bowers et al.
patent: 4674269 (1987-06-01), Denda
patent: 4709531 (1987-12-01), Denda

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