Image forming apparatus
US4890139A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 4, 1988 |
| Grant date | Dec 26, 1989 |
| Priority date | — |
| Expiry date | Nov 4, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/043
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An image forming apparatus capable of producing both a normal image and a reversal image, is provided with a photosensitive member, a charger for charging the photosensitive member, an optical system for forming an electrostatic latent image on the photosensitive member, a first developing device for developing the electrostatic latent image using black toner, a second developing device for developing the electrostatic latent image using white toner, a white paper supply cassette for supplying a white paper into a transfer region confronting the photosensitive member, a black paper supply cassette for supplying a black paper into the transfer region, and a control system including a microcomputer for controlling the developing devices and the paper supply cassettes to form a black toner image on the white paper or a white toner image on the black paper.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.