Rotatable charging apparatus, and printing machine including the same
US6308032A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 19, 2000 |
| Grant date | Oct 23, 2001 |
| Priority date | — |
| Expiry date | Sep 19, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/0258
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A rotatable charging apparatus includes a length extending between a first end and a second end, with the rotatable charging apparatus centered about an axis parallel to the length. The rotatable charging apparatus outer periphery forms N apparatus positions. One charging device is fixed to each of N-1 apparatus positions. The remaining (Nth) apparatus position is devoid of a charging device, thus forming an "empty" charging device position. A host printing machine selectively causes the rotatable charging apparatus to rotate about its axis thereby selectively position any of its N-1 charging devices to face a proximately-located photosensitive element. When a problem exists with the current charging device, or when the total number of operating hours of the current charging device exceeds a fixed threshold, the printing machine causes the rotatable charging apparatus to rotate from its current charging device to position a new charging device facing the photosensitive element. Also, the printing machine causes the rotatable charging apparatus to rotate from its current charging device to the empty charging device position facing the photosensitive element when a power-down or hard…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.