Image forming apparatus
US5420668A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 10, 1994 |
| Grant date | May 30, 1995 |
| Priority date | — |
| Expiry date | Mar 10, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/00552
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An image forming apparatus including a rotatable photosensitive member, charging means for charging the photosensitive member at a predetermined potential, developing means for supplying toner to the photosensitive member to provide a developed image, transfer means including a transfer roller for transferring the developed image to a paper sheet, paper removal detecting means for detecting that a jammed paper is removed from the image forming apparatus, stopping means responsive to the jammed paper removal detecting means for stopping supply of the toner to the photosensitive member, rotating means responsive to the paper removal detecting means for rotating the photosensitive member and the transfer roller, and setting means responsive to the paper removal detecting means for setting the circumference of the transfer roller alternately in a first state, in which the circumference of the transfer roller is supplied with a first voltage more negative than the predetermined potential of the photosensitive member, and in a second state in which the circumference of the transfer roller is supplied with a second voltage more positive than the predetermined potential of the photosensiti…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.