Magnetic brush with bristle height equal to developing gap
US5430528A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jun 29, 1990 |
| Grant date | Jul 4, 1995 |
| Priority date | — |
| Expiry date | Jun 29, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/09
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In a developing apparatus in which a developer containing magnetic particles is carried on a developer carrier to form a magnetic brush and a latent image on a latent image carrier opposing the developer carrier is developed by the magnetic brush, the magnetic brush bristle height and the developing gap are controlled to keep density of a first color image and density of a second and the ensuing color images in color development at predetermined values or more, thereby maintaining quality of printed images stably. There are also provided method and apparatus of measuring the bristle height of the magnetic brush of the developing apparatus, which bristle height is a parameter indispensable for control of the above developing condition, under the dynamic condition that the developing roller rotates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.