Neutral pressure magnet roll type developing unit
US5089852A · kind A · utility
6Cited by
5References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 13, 1990 |
| Grant date | Feb 18, 1992 |
| Priority date | — |
| Expiry date | Dec 13, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/0942
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A developer housing of an electrostatographic reproducing machine of the type using a magnet roll is provided with two openings in at least one of its side walls. The first of these holes is located at the high pressure portion of the housing, and the second of the holes is located at the low pressure end of the housing. The holes are interconnected by a pneumatic duct. A pressure differential is created as vane-like whiskers of developer are rotated about the magnet roll. The duct neutralizes these pressure differentials within the developer housing, thus preventing toner from being blown out of the developer housing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.