Process and apparatus for pass-through wrapping

Details Process and apparatus for pass-through wrapping Process and apparatus for pass-through wrapping

1987-11-10

1989-05-23

Sipos, John

Package making

Methods

Applying a partial cover

53441, 53466, 53556, 53586, 53449, 53176, B65B 1108

Patent

active

048318124

ABSTRACT:
A process for wrapping a load with prestretched film comprising unwinding and prestretching the film before applying the film to the load, passing the load through a curtain of film and cutting the film behind the load while forming the curtain and wherein said prestretching step includes positioning the prestretching means in a standby position in front of the load wherein said means are positioned close together while initially prestretching the curtain, moving the prestretching means apart transversely in association with the required delivery of the prestretched film until such means are in a spaced apart position near the side surfaces of the load, prestretching the film to cover the side surfaces of the load, prestretching the film to cover the rear surface of the load, and then moving the prestretching means toward one another transversely behind the load until they are close together in association with the necessary delivery of prestretched film.

REFERENCES:
patent: 3884016 (1975-05-01), Bustrom
patent: 4044529 (1977-08-01), Zelnick
patent: 4413463 (1983-11-01), Lancaster

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