Image forming apparatus including an image bearing member and an erasing device for erasing a portion of an image from the image bearing member
US5506662A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 19, 1994 |
| Grant date | Apr 9, 1996 |
| Priority date | — |
| Expiry date | Jul 19, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/36
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The copying machine has a charge partially erasing device for limiting a region of the photosensitive drum, in which an electrostatic latent image can be formed. The charge partially erasing device includes a plurality of LED elements arranged in the direction of the axis of the photosensitive drum, and the LED elements are turned on in accordance with data stored in the ROM in a predetermined order. The data stored in the ROM can be read out at all times as the document size key of the operation panel is operated, and the charge supplied on the photosensitive drum is partially erased. Further, the number of times the document size key was operated is counted, and a partial erase pattern is selected based on the number of times the was operated. Thus, a specific partially erased image is achieved by a simple operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.