Power control for instant-on-integral resistive heating belt fus

Details Power control for instant-on-integral resistive heating belt fus Power control for instant-on-integral resistive heating belt fus

1993-12-16

1995-07-25

Braun, Fred L.

Photocopying

Contact printing

Light boxes

219216, G03G 1520

Patent

active

054367123

ABSTRACT:
A power controller, which does not rely on the use of sensors such as thermistors to control the operating temperature of a belt fuser is provided. It features various preset inputs to control; steady state watts/in, cold start boost watts/in, warmup and cooldown time constants.
The controller sets the desired power based on the on-off cycling of the system. For a cold start, the steady state plus boost power is used, during warmup the boost level is exponentially decreased at a rate set by a warmup time constant. When at rest (with no applied power) the power setpoint is exponentially increased at a rate set by a cooldown time constant.

REFERENCES:
patent: 4563073 (1986-01-01), Reynolds
patent: 4565439 (1986-01-01), Reynolds
patent: 4994852 (1991-02-01), Matsuuchi et al.
patent: 5084738 (1992-01-01), Ishikawa
patent: 5115279 (1992-05-01), Nishikawa et al.
patent: 5182606 (1993-01-01), Yamamoto et al.
patent: 5315356 (1994-05-01), Nagato et al.

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