Electrophotographic copying machine with means for mixing and removing toner and an integral exposure plate
US4449810A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 12, 1982 |
| Grant date | May 22, 1984 |
| Priority date | — |
| Expiry date | Jul 12, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/0636
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A dry type development apparatus comprising (1) a developer container disposed near a latent-electrostatic-image-bearing photoconductor, a development roller, disposed within the developer container, comprising a rotatable non-magnetic sleeve and inner magnets, for supplying the toner to the photoconductor for development of the latent images, a rotatable bucket wheel for supplying the toner to the development roller, a doctor blade for forming on the development roller a toner layer with a predetermined thickness by scraping the excess toner off the toner layer; and (6) a separator which extends over the bucket wheel and guides the toner scraped off by the doctor blade onto the bucket wheel or to the developer container, includes the improvement wherein the development roller and the bucket wheel are rotated in the same direction, and the toner flows from the lower portion of the developer roller to the bucket wheel, then towards the upper portion of the development roller, and, of the toner transferred from the bucket wheel to the development roller, the toner scraped off the toner layer by the doctor blade is carried onto the separator, and is returned onto the bucket wheel or t…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.