Corona deterioration and moisture compensation for transfer unit in an electrophotographic apparatus
US5291253A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Dec 18, 1990 |
| Grant date | Mar 1, 1994 |
| Priority date | — |
| Expiry date | Dec 18, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/1645
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A transfer apparatus for electrophotography is disclosed in which the resistance values of a transfer belt and the recording paper are measured, and the current value applied to a device for charging a member is set on the basis of the electrical resistance values. The charging device of the transfer belt is adapted to be taken up and reeled out and to circulate along a track. This configuration assures a stable transfer characteristic against the secular environmental variations of the component elements, lengthens the intervals of replacement of the charged member, and hence increases the mechanical life of the transfer apparatus and the electrophotographic apparatus using the same.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.