Rolled paper feeding apparatus which provides a constant torque

Details Rolled paper feeding apparatus which provides a constant torque Rolled paper feeding apparatus which provides a constant torque

1996-11-29

1999-03-23

Jillions, John M.

Winding, tensioning, or guiding

Tension control or brake

Supply controlled

2424224, B65H 2306

Patent

active

058848606

ABSTRACT:
An image forming apparatus which uses rolled paper pulls the paper around a decurling roller in order to straighten the paper to allow the paper to remain flat. One or more torque limiting devices which provides a constant angular force against the unrolling of the paper is utilized to provide a force which straightens out or decurls the rolled paper which increases as the radius of the roll of paper decreases. The torque limiting device can be implemented using a spring which grips a rotating cylindrical surface as the surface rotates, a viscous-elastic fluid which provides a resistance against rotation, frictional surfaces, or magnets. The torque limiting device may also be implemented using two springs which provide different resistance against rotation in order to provide different rotational resistance, depending on the direction the roll of paper is rotating.

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