Constant tension stretch wrapping machine

Details Constant tension stretch wrapping machine Constant tension stretch wrapping machine

1982-05-04

1986-05-27

Sipos, John

Package making

Apparatus for contraction of cover by stretching or shrinking

53587, 53389, 242 7553, B65B 1104

Patent

active

045907463

ABSTRACT:
A wrapping machine and operation for wrapping a load arranged on a pallet with a stretchable wrapping material under a substantially constant tension during the wrapping operation. The load that is to be wrapped is arranged on a support member which can be rotated for drawing off stretchable wrapping material from a roll of such material. A dispensing mechanism holds the roll of stretchable wrapping material and dispenses the material so that it can be wrapped around the load arranged on the support member. As an alternative to the support member with the load being rotated, the dispensing member can revolve around the support member and the load so as to dispense and wrap the load with the stretchable material. During the wrapping operation, the tension on the portion of the stretchable wrapping material being wrapped around the load is maintained at a substantially constant tension. Prior to actually wrapping the load with the stretchable wrapping material, such material can be prestretched. The prestretching operation occurs at a location between the dispensing mechanism and the location at which the stretchable material is actually supplied to the load for wrapping.

REFERENCES:
patent: 852337 (1907-04-01), Marks
patent: 2285654 (1942-06-01), Hanna
patent: 2544467 (1951-03-01), Michel
patent: 4095318 (1978-06-01), Abbott
patent: 4387548 (1983-06-01), Lancaster
patent: 4413463 (1983-11-01), Lancaster
patent: 4418510 (1983-12-01), Lancaster
patent: 4458467 (1984-07-01), Shulman
patent: 4514955 (1985-05-01), Mouser

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