Fail safe fuser lamp control

Details Fail safe fuser lamp control Fail safe fuser lamp control

1988-04-08

1990-01-30

Braun, Fred L.

Photocopying

Contact printing

Light boxes

219216, G03G 1520

Patent

active

048976920

ABSTRACT:
A heated fuser roll and control for fixing toner images to copy substrates. A light chopper adapted for rotation with the heated fuser roll generates signals which actuate a switch operably coupling a power source and a lamp for heating the fuser roll. The lamp is energized at maximum power at a duty cycle of 10% which provides for a fail-safe arrangement in the event the switch coupling the power source and the lamp short circuits which would result in overloading the lamp.

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patent: 4541708 (1985-09-01), Shigenobu
patent: 4556779 (1985-12-01), Hashimoto et al.

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