Power control for instant-on-integral resistive heating belt fuser
US5436712A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 16, 1993 |
| Grant date | Jul 25, 1995 |
| Priority date | — |
| Expiry date | Dec 16, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/2041
- WIPO fieldOptics
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.