Package making – Methods – Wrapping contents including cover forming
Patent
1983-01-03
1985-11-19
Larson, Lowell A.
Package making
Methods
Wrapping contents including cover forming
53556, 53588, 53210, B65B 1312
Patent
active
045533741
ABSTRACT:
A stretch wrapping apparatus and process for wrapping and sealing random-sized loads, in which the load is surrounded with a plurality of tube forming support members which extend along the length of the load. A conveyor directly beneath the load supports the load and preferably incorporates at least one upper and one lower endless belt, rotating so that the upper surface of the upper belt and the lower surface of the lower belt are both carried in the same downstream direction at the same speed. The tube forming support members converge to the load with skids which do not support the load, and preferably have endless conveyor belts with an outer surface circulating in the same downstream direction and at the same speed as the lower dual conveyor. A stretched film web is wrapped around the tube forming support members, conveyor, and load by a film dispenser, wrapping the load as well as space in front of and behind the load. The film web wrapped around the load, tube forming support members, and conveyor resumes its memory position against the load when the ends of the tube forming support members and conveyor are encountered. A sealing mechanism collapses and seals the film web enclosures before and behind the load, to provide a sealed wrapped package.
REFERENCES:
patent: 3788199 (1974-01-01), Sato et al.
patent: 4050220 (1977-09-01), Lancaster et al.
patent: 4317322 (1982-03-01), Lancaster et al.
Lancaster William G.
Lancaster, III Patrick R.
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