Developing apparatus
US4705383A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 10, 1985 |
| Grant date | Nov 10, 1987 |
| Priority date | — |
| Expiry date | Dec 10, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/09
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A developing apparatus for use in an electrophotographic copying machine or the like, which includes a magnet roller having in it, a main pole magnet, with one of its poles directed outwardly and interpole magnets, with their poles opposite in polarity to the one of the poles of the main pole magnet being directed outwardly so as to attract a developing material composed of toner and carrier onto the surface of the magnet roller through magnetic induction of the main pole magnet and interpole magnets, and a doctor blade for restricting the amount of attraction of the developing material onto the surface of the magnet roller. The doctor blade has a magnet member provided in it, with its pole having the same polarity as that of the outer side pole of the main pole magnet being adapted to confront the magnet roller.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.