Apparatus for unwinding a roll of blocking-prone web material

Details Apparatus for unwinding a roll of blocking-prone web material Apparatus for unwinding a roll of blocking-prone web material

1985-05-16

1986-04-01

Levy, Stuart S.

Winding, tensioning, or guiding

Coil holder or support

Spool or core

242 751, B65H 1610, B65H 23185

Patent

active

045792925

ABSTRACT:
An apparatus for unwinding a roll of web material which is prone to blocking: for example, an elastomeric film which, while rolled, is prone to having the convolutions of the roll stick together. The apparatus induces a sufficiently high rate of strain in a short span adjacent the roll to effect continuously peeling the outermost convolution from the roll. Additionally, the apparatus is of such a geometry that, in the event blocking precipitates circumferential shifting of the point of web separation from the roll, the stripping angle is increased. This, in turn, increases the effectiveness of the rate of strain induced peeling force on the web whereby more positive peeling occurs.

REFERENCES:
patent: 2223445 (1940-12-01), Doble
patent: 3092343 (1963-06-01), Beerli
patent: 3202376 (1965-08-01), Dutro et al.
patent: 3423040 (1969-01-01), Humphrey et al.
patent: 4222811 (1980-09-01), Enders

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