Apparatus for controlling sheet velocity
US5493374A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 7, 1994 |
| Grant date | Feb 20, 1996 |
| Priority date | — |
| Expiry date | Mar 7, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/00603
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An apparatus in which an advancing copy sheet is disclosed. The apparatus includes a moving imaging member having a toner image thereon. The copy sheet contacts an imaging member to transfer a toner image from the imaging member to the copy sheet. A fusing member fuses the toner image to the copy sheet and advances the copy sheet at an adjustable velocity while the copy sheet receives the toner image from the imaging member. A controller communicates with the imaging member and the fusing member to maintain the velocity of the copy sheet with that of the imaging member. The velocity is maintained at a selected relationship. An imaging member drive moves the imaging member at a first velocity. The imaging member drive includes: a crystal clock that generates a fixed reference signal, a programmable divider which receives the signal and generates a control signal, and a servo motor responsive to the control signal. A fuser drive rotates the fuser roll to advance the sheet at a second velocity. The fuser drive includes: a voltage controlled oscillator that generates a signal responsive to the velocity differential between the imaging member drive and the fuser drive, a programmable di…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.