Electrographic copying device with magnetic cylinder
US4331101A · kind A · utility
11Cited by
1References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 16, 1980 |
| Grant date | May 25, 1982 |
| Priority date | — |
| Expiry date | May 16, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/0636
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The magnetic field which is required to hold image-forming toner particles on the tubular carrier of electrographic copiers is provided by single piece integrally formed permanent magnet bodies extending from end to end of the tubular carrier, the latter comprising a thin layer of ferromagnetic material to reduce the effect on inhomogeneities which may exist in the magnet bodies.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.