Developing device
US4575220A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 14, 1983 |
| Grant date | Mar 11, 1986 |
| Priority date | — |
| Expiry date | Dec 14, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/0636
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A device for developing an electrostatic latent image formed on a photosensitive member includes a developing sleeve which is driven to rotate in a predetermined direction and a pressure blade which is kept pressed against the sleeve to form a thin film of uniformly charged toner so as to apply for the latent image for development. In accordance with the present invention, the forward end portion of the pressure blade is specifically shaped such that a projection having the width which substantially corresponds to the width of an image forming area of the photosensitive member is provided to extend beyond a contact line between the sleeve and the blade thereby allowing to form the thin film of toner whose width substantially corresponds to the image forming area of the photosensitive member, thereby preventing the waste of toner from occurring.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.