Device for separating a heat roller from a pressure roller in a

Details Device for separating a heat roller from a pressure roller in a Device for separating a heat roller from a pressure roller in a

1998-12-14

2000-03-07

Smith, Matthew S.

Electrophotography

Having particular structure

Modular or displaceable

399328, 399331, 219216, G03G 1520

Patent

active

060351608

ABSTRACT:
A roller separating device automatically separates a pressure roller from a heat roller when the rollers are unable to rotate or when a fixing operation is not in progress. The roller separating device includes an idle gear engaged with a pressure roller gear, a cam driving gear engaged with the idle gear, an electronic clutch fixed to a cam shaft to which a cam is also fixed. The electronic clutch is detachably coupled to the cam driving gear. The cam is driven by a driving force of a power gear and the electronic clutch couples/uncouples the driving force to the cam. When the electronic clutch is actuated, a driving force of the cam driving gear is transferred to the cam to move a pressure roller support frame so that the pressure roller is separated from the heat roller. When the electronic clutch is inactuated, the pressure roller support frame returns to its normal position by an elastic force of a spring so that the pressure roller contacts the heat roller.

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