Selective pre-transfer corona transfer with light treatment for tri-level xerography
US5038177A · kind A · utility
10Cited by
12References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 15, 1988 |
| Grant date | Aug 6, 1991 |
| Priority date | — |
| Expiry date | Dec 15, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/0131
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Balanced, efficient corona transfer for both the charged area image and the discharged area image of a developed tri-level image is obtained by the provision of a selective pre-transfer charge corona device in combination with a pre-transfer discharge lamp. While improved transfer over prior art devices is obtained using a pre-transfer lamp prior to pre-transfer charging the preferred embodiment of the invention utilizes a pre-transfer lamp before and in coincidence with pre-transfer charging.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.