Method of and apparatus for shrinking a shrink film cover

Details Method of and apparatus for shrinking a shrink film cover Method of and apparatus for shrinking a shrink film cover

1994-10-26

1996-04-02

Sipos, John

Package making

Methods

Conforming by stretching or shrinking of cover over contents

53459, B65B 5306

Patent

active

055029477

ABSTRACT:
A method of and apparatus for shrinking a shrink film cover covering a stack of goods and having a free edge thereof located beneath the stack bottom, which method and apparatus includes providing a shrink frame, movable vertically along the stack, for applying hot air to the shrink film cover to provide from below upwards thermal energy necessary for shrinkage of the shrink film cover, providing an arrangement for inflating the shrink film cover with hot air to form a space closed by the shrink film cover, with overpressure being maintained in the closed space until application of the thermal energy ends, and delivering hot air from the shrink frame to a lower region of the shrink film cover into a collecting compartment located beneath a stack bottom and, thereafter, from the collecting compartment into the space closed by the shrink film cover.

REFERENCES:
patent: 3777446 (1973-12-01), Graver
patent: 4562689 (1986-01-01), Hannen
patent: 4575989 (1986-03-01), Hannen
patent: 4616471 (1986-10-01), Hannen

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