Film driving mechanism for high inertia storage rolls

Details Film driving mechanism for high inertia storage rolls Film driving mechanism for high inertia storage rolls

1974-11-22

1976-11-02

Gilreath, Stanley N.

Winding, tensioning, or guiding

Coil holder or support

Spool or core

242 65, 242 751, 242 7547, 242 755, B65H 2308, B65H 2318

Patent

active

039892018

ABSTRACT:
A mechanical means for unwinding paper sheet, plastic film or other thin films from heavy storage rolls. The device includes a normal unwind pair of squeeze rolls which grip the film on opposite surfaces and propel the film toward a use area. A friction roll is positioned on the periphery of the storage roll but normally runs free and is not coupled to a power means. When the mechanism is accelerating, as in a starting operation, power is applied to the friction roll to aid in its speed-up. When the mechanism is decelerating, as in a stopping operation, power is applied to the friction roll to aid as a brake. Auxiliary pressure means may be provided to increase the contact pressure between the friction roll and the storage roll to prevent slipping.

REFERENCES:
patent: 1672320 (1928-06-01), James
patent: 1853292 (1932-04-01), Wood
patent: 1973363 (1934-11-01), Wood
patent: 3348787 (1967-10-01), Giles

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