Electrophotographic apparatus having reduced drum drive flutter
US5063399A · kind A · utility
10Cited by
10References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 6, 1990 |
| Grant date | Nov 5, 1991 |
| Priority date | — |
| Expiry date | Aug 6, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/0921
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An electrophotographic printing apparatus includes a laser or comparable image-forming apparatus which produces an image on a rotating drum having a metal core. Electrostatic images formed by the laser or the like are toned by a toning mechanism that includes a rapidly rotating magnetic core. To prevent the rapidly rotating core from producing pole transitions causing a flutter in the movement of the drum, the core has an arrangement of magnetic poles which alternate circumferentially and vary along the length of the core so that the drum is subjected to pole transistions which vary in phase along the length of the drum.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.