Electrographic printer comprising a magnetic brush and a hall effect magnetic sensor
US5701552A · kind A · utility
6Cited by
3References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 7, 1996 |
| Grant date | Dec 23, 1997 |
| Priority date | — |
| Expiry date | Jun 7, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2217/0016
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An electrographic printer includes: a magnetic brush having a stationary outer shell and a rotating multi-pole magnet within the outer shell; an electrographic print head mounted on the outer shell of the magnetic brush; a Hall effect sensor located adjacent to the magnetic brush for detecting a field produced by the multi-pole magnet parallel to the surface of the shell and producing an output signal; and a pulse control circuit connected to the Hall effect sensor for detecting zero crossings of the output signal and supplying printing pulses to the electrographic print head in response thereto.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.