Power supply sequencing circuit for flash fuser
US4862225A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 21, 1988 |
| Grant date | Aug 29, 1989 |
| Priority date | — |
| Expiry date | Mar 21, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/201
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A fusing system for a xerographic printer in which the energy from a plurality of flash lamps is used to melt and fuse toner particles to paper sheets as said sheets travel through the fusing station. Each flash lamp has an associated storage capacitor and a charging circuit for that capacitor which is operative to develop a charge on its associated storage capacitor depending upon the length dimension of the paper sheets flowing through the system. Moreover, the capacitor charging circuits are rendered operative in a predetermined serial order so as not to unduly load down the alternating current source for the system. A lamp triggering circuit synchronized with the zero-crossings of the alternating current supply voltage provides the ignition potential for the flash lamps such that firing takes place at a time when the supply voltage is at a minimum.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.