Core for winding a web of plastic film prior to heat treatment o

Details Core for winding a web of plastic film prior to heat treatment o Core for winding a web of plastic film prior to heat treatment o

1996-08-20

1998-06-09

Jillions, John M.

Winding, tensioning, or guiding

Coil holder or support

Spool or core

2426131, 242909, 2426104, B65H 7510

Patent

active

057622892

ABSTRACT:
A core for winding a web of plastic film prior to heat treatment of the film is provided with annular collars having a height of 1 to 10 times the thickness of the film.
The core includes a rigid cylindrical member of GFRP, CFRP, or a composite structure of metal or heat-resistant resin material and fiber reinforced plastics, and the annular collars provided at the ends of the cylindrical member. The annular collars protect the film from a cut end mark which may be caused by the end edge of the web, degradation of flatness, and slipping with the core while the web wound around the core accepts the heat treatment.

REFERENCES:
patent: 1121905 (1914-12-01), Dorricott
patent: 3297155 (1967-01-01), Gattenby, Jr. et al.
patent: 3602449 (1971-08-01), Sroka
patent: 3645820 (1972-02-01), Clary et al.
patent: 4021001 (1977-05-01), Sproat
patent: 4242297 (1980-12-01), Dacey et al.
patent: 4934622 (1990-06-01), Hakiel

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