Composite image recording apparatus
US4937629A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 10, 1988 |
| Grant date | Jun 26, 1990 |
| Priority date | — |
| Expiry date | Aug 10, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G13/09
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An image forming method of the present invention comprises: a first toner image formation process for forming a first toner image by forming, on a latent image carrier, a first latent image which corresponds to a first image and developing the first latent image by a first toner charged to one polarity through a development process selected from normal and reverse development process selected from normal and reverse development processes so as to correspond to the polarity of the first toner; a second toner image formation process for forming a second toner image by forming, on the latent image carrier, a second latent image which correspond to a second image and developing the second latent image by a second toner charged to the other polarity by the other development process while applying a developing bias; and a transfer treatment process for simultaneously transferring said first and second toner images to a transfer medium; wherein said developing bias VB2 satisfies the following equations: EQU .vertline.VT1-VB2.vertline.>.vertline.VH2-VB2.vertline. . . . (1) EQU .vertline.VT1-VB2.vertline.>.vertline.VT1-VH2.vertline. . . . (2) where a surface potential of said first toner im…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.