Development apparatus
US4194830A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 26, 1978 |
| Grant date | Mar 25, 1980 |
| Priority date | — |
| Expiry date | Sep 26, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/0641
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A development apparatus for developing a latent electrostatic image formed on a photoconductor with a one-component type developer has a charging device comprising at least two charging members for charging the developer held in a developer container. The first charging member serves both as a doctor blade and for regulating the amount of the developer on the development roller, and the second charging member charges the developer before it is charged by the first charging member. In the second charging member, there is formed a hole for allowing the developer to pass therethrough. The developer scraped by the first charging member is returned to the developer container through the hole and part of the scraped developer is carried back to the first charging member, so that a developer circulation path is formed in the charging device. While passing through the developer circulation path, the developer is charged further, whereby the developer is sufficiently charged before it is actually used for development.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.