Friction drive stretch wrapping apparatus

Details Friction drive stretch wrapping apparatus Friction drive stretch wrapping apparatus

1982-02-01

1985-02-05

Spruill, Robert L.

Package making

Apparatus for contraction of cover by stretching or shrinking

53211, 53399, 53587, B65B 1104, B65B 5300

Patent

active

044971591

ABSTRACT:
An apparatus for applying stretchable plastic film to loads for containment of the loads using two frictionally connected rollers which are held together and driven by the film web at different speeds to elongate the plastic film beyond its yield point. After the elongated film has been stretched, it is wrapped around a rotating load. The rollers are cammed apart during the beginning of the wrap so that relatively untensioned film is wrapped around the load at the beginning of the wrap. The cam force is then released and the rollers are pulled together in frictional engagement by the film web being pulled off of the film roll to stretch the film web.

REFERENCES:
patent: 3779441 (1973-12-01), Policella
patent: 4248031 (1981-02-01), Del Pozo, Jr.
patent: 4302920 (1981-12-01), Lancaster et al.
patent: 4317322 (1982-03-01), Lancaster et al.
patent: 4371417 (1983-02-01), Frick et al.
patent: 4387552 (1983-06-01), Lancaster et al.
patent: 4413463 (1983-11-01), Lancaster

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