Electrographic apparatus having improved developer metering construction
US4227796A · kind A · utility
12Cited by
6References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 29, 1979 |
| Grant date | Oct 14, 1980 |
| Priority date | — |
| Expiry date | May 29, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S222/01
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Electrographic apparatus having an improved developer metering construction provides an elongated coil spring that extends across an applicator member's transport path (from the developer supply to the development zone) to meter and mix applied developer. Spring tension can be adjusted to control developer flow. In certain embodiments the spring provides a source of reference potential for and/or triboelectrically charges the developer and can enhance magnetic mixing of the developer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.