Developing device with a scraping unit arranged to form a stirring area
US5144382A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 18, 1990 |
| Grant date | Sep 1, 1992 |
| Priority date | — |
| Expiry date | Oct 18, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/0609
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The developing device, which is capable of mixing developers with magnetic toners and capable of providing the developers having a uniform magnetic toner density to a photoconductor for a copying machine, the device having a developing tank which contains a roller composed of a sleeve and a magnetic body with the magnetic body being disposed inside of the sleeve concentrically and rotatably with respect to each other, the device also having a magnetic toner supply tank disposed adjacent to the developing tank for supplying the magnetic toners to the developing tank through a toner supply port, the developing device includes a unit coupled to the developing tank for controlling an amount of the developers to be supplied to the sleeve, and a unit disposed between the toner supply port and the control unit for scraping the developers from the sleeve. The scraping unit is so arranged that a stirring portion is formed in association with the sleeve for stirring the developers scraped from the sleeve and the magnetic toners supplied from the toner supply tank through the toner supply port. The scaping unit has a throughhole for making the scraped developers to be mixed with the magnetic …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.