Developing apparatus
US5172166A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 2, 1991 |
| Grant date | Dec 15, 1992 |
| Priority date | — |
| Expiry date | Jul 2, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/0898
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A developing apparatus capable of preventing a leakage of developing powder from being placed on photoconductor of a copying machine, the developing apparatus having a doctor for restricting an amount of developing powder to be placed on said photoconductor of the copying machine includes a unit for storing a developing powder, a roller having a sleeve and a magnet and rotationally supported on the storing unit for laminating the developing powder output from the storing unit on the sleeve in accordance with a magnetic force of the magnet, and a unit for preventing the developing powder from being leaked to a non-imaging area located at end portions of the roller, the preventing unit being located in a upstream side of the storing unit and being so arranged that an interval between the preventing unit and the roller is larger than an interval between the doctor and the roller.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.