Method and arrangement for developing a plurality of electrostatic images on a substrate
US6188860A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 18, 1999 |
| Grant date | Feb 13, 2001 |
| Priority date | — |
| Expiry date | Jun 18, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/017
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In the particular embodiment disclosed in the specification, an electrostatic image forming arrangement includes a photoreceptor in the form of a continuous belt which is moved past four development stations each containing a different colored toner which incorporates ferromagnetic material. At each development station a developer roll conveys toner in closely spaced relation to the surface of the photoreceptor and a DC-biased AC voltage is applied to the developer roll to cause the toner to be transferred to an electrostatic image on the photoreceptor. A magnet member mounted on the opposite side of the photoreceptor produces a magnetic field which holds toner on the image-receiving surface permitting a greater range of variation for the DC-biased AC toner transfer voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.