Multicolor image forming method preventing mixing of colors
US5541029A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 12, 1994 |
| Grant date | Jul 30, 1996 |
| Priority date | — |
| Expiry date | Sep 12, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G13/013
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A multicolor image forming method of the kind sequentially developing a plurality of latent images formed on an image carrier by toners of respective colors and transferring the resulting toner images to a recording medium at the same time. Development in the second color and successive colors is implemented as noncontact type development using a thin layer of nonmagnetic toner. This toner layer satisfies a condition of dt/.epsilon.t<590(.mu.m).sup.2 where dt and .epsilon.t are respectively the thickness and the average volume specific inductive capacity of the layer. The toner for the development in the second color and successive colors is produced by polymerization and has an average volume particle size of 10 .mu.m or less. Development in the first color is implemented by a toner having a relatively sharp particle size distribution, not including relatively large particles, having a sharp charge amount distribution, and not producing particles of low charges. The toner for the development in the first color has a smaller average particle size than the toner for the development in the second and successive colors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.