Image forming method using three component developer
US4525447A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 27, 1983 |
| Grant date | Jun 25, 1985 |
| Priority date | — |
| Expiry date | Oct 27, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G13/09
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An image forming method which includes following steps: PA0 a. forming on a photosensitive member an electrostatic latent image having at least three different levels of potentials, i.e., having a first latent image and a second latent image; PA0 b. developing the first and second latent images with a magnetic developer in the form of a mixture of at least three components, i.e., a magnetic carrier, a first toner triboelectrically chargeable to a specific polarity by contact with the magnetic carrier, and a second toner triboelectrically chargeable by contact with the first toner to a polarity opposite to the triboelectric charge polarity of the first toner but substantially not triboelectrically chargeable by contact with the magnetic carrier, by selectively depositing the first and second toners on the latent images; and PA0 c. transferring the resulting toner image onto the surface of a copy material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.