Developer module with electromagnetic shutter
US5563689A · kind A · utility
17Cited by
6References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 26, 1995 |
| Grant date | Oct 8, 1996 |
| Priority date | — |
| Expiry date | May 26, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/09
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An electromagnetic shutter (40) is comprised of two poles, a south pole (42) and a north pole (44) that are disposed above the surface of a delivery roller element (32). The delivery roller element (32) rotates about a fixed magnet (30) that has various poles. The south pole (42) of the electromagnetic shutter (40) is aligned proximate to the one of the north poles of the magnet (30). When the electromagnetic shutter (40) is activated with the windings (48) and (50) or winding (48) only, the shutter will form a magnetic dam (79) of toner particles which will effectively prevent passage of the toner particles thereby.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.