Image printer
US5634183A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 28, 1996 |
| Grant date | May 27, 1997 |
| Priority date | — |
| Expiry date | Feb 28, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/0921
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In an image printer performing multi-color printing, two magnetic poles having the same polarity are provided adjacent to each other in a position facing the printing body of the second developing agent holding body provided in the second developing unit, and development is performed under a condition satisfying the following formulas; EQU B1.ltoreq.1100, EQU 1000.ltoreq.B2.ltoreq.1200, EQU -300.ltoreq.B1-B2.ltoreq.0, EQU F.apprxeq.0 where B1 (gauss) is a magnetic flux density on the surface of the developing agent holding body of one magnetic pole of the magnetic poles arranged in the downstream side of the transmitting direction of the developing agent, and B2 (gauss) is a magnetic flux density on the surface of the developing agent holding body of the other magnetic pole of the magnetic poles arranged in the upstream side of the transmitting direction of the developing agent, and F (gf) is a rubbing force to the printing body of the magnetic brush in the second developing unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.