Image forming apparatus
US4685794A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 13, 1985 |
| Grant date | Aug 11, 1987 |
| Priority date | — |
| Expiry date | Sep 13, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/36
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An image forming apparatus is provided with a light emitting element for indicating a specific range of an original disposed on an original table, and the other light emitting elements for erasing the electric charge on the surface of a photosensitive body in response to the specific range of the original indicated by the light emitting element. A spot light is applied to the original on the original table by the light emitting element, and moved to specify the perimeter of an erasure range. In image forming, the specific range inside the perimeter is defined by an erasure range designating key and is developed through the black toner by a developing device. On the other side, the specific range outside the perimeter is defined by the other erasure range designating key and is developed through the red toner by the other developing device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.