Winding core for heat shrinkable film material

Details Winding core for heat shrinkable film material Winding core for heat shrinkable film material

1979-12-31

1980-12-30

Hoag, W. E.

Plastic and nonmetallic article shaping or treating: processes

Utilizing heat releasable stress to reshape solid workpiece

242 685, 2642896, 264342R, 264348, B29C 2500, B29D 720, B29D 722

Patent

active

042422973

ABSTRACT:
A generally cylindrical core for winding a web of sheetlike material has portions with a lesser diameter than other portions such that otherwise baggy areas of the web overlie the lesser diameter area of the core. The core particularly solves the problem of elongated edges on a wound film of heat shrinkable thermoplastic material caused by differential shrinkage about a core.

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