Fail safe fuser lamp control
US4897692A · kind A · utility
1Cited by
10References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 8, 1988 |
| Grant date | Jan 30, 1990 |
| Priority date | — |
| Expiry date | Apr 8, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/2039
- WIPO fieldOptics
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.