Developing device capable of preventing cracking of developer due to pressing of a developer layer controlling member
US5875379A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 20, 1997 |
| Grant date | Feb 23, 1999 |
| Priority date | — |
| Expiry date | Aug 20, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/0866
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A developing device according to the present invention has a developer carrying member for conveying a developer to a developing area opposite to an image carrying member with the developer held on its surface and a controlling member for controlling the amount of the developer conveyed to the developing area upon being pressed against the surface of the developer carrying member, the surface of the developer carrying member and/or the surface of the controlling member pressed against the surface of the developer carrying member being composed of an elastic material having a rubber hardness of 20.degree. to 70.degree. and having elongation of 400 to 1200%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.