Xerographic development apparatus having a large reservoir for controlled flow through a narrow development zone
US4007707A · kind A · utility
11Cited by
7References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 21, 1975 |
| Grant date | Feb 15, 1977 |
| Priority date | — |
| Expiry date | Jan 21, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/0822
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A novel development system for controlling the flow rate of developer through a narrow development zone, using a reservoir which has a feed chamber for maintaining a constant pressure head at the entrance to the narrow development zone. Developer flow is initiated upon demand by virtue of actuation of a valve positioned between the feed chamber and the entrance to the development zone; since considerable developer mixing occurs in the developer reservoir, mixing devices for mixing added toner with carrier beads may be simplified.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.