Winding core for heat shrinkable film material

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

1976-12-13

1978-09-19

Kendell, Lorraine T.

Special receptacle or package

For roll or reel

156 86, 242 685, 428364, 428377, 428399, 428906, B65D 8567, B65H 7702

Patent

active

041147561

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.

REFERENCES:
patent: 2772774 (1956-12-01), Rabuse
patent: 3066794 (1962-12-01), Mulheren et al.
patent: 3297155 (1967-01-01), Gattenby et al.
patent: 3426892 (1969-02-01), Poncy
patent: 3433355 (1969-03-01), Smith
patent: 3731792 (1973-05-01), Rolston
patent: 3737030 (1973-06-01), Stewart
Rienau, J. H., Slitting and Winding Equipment, Modern Plastics Encyclopedia 1976-1977 edition.

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