Method and apparatus for developing electrostatic latent images
US4504138A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 27, 1981 |
| Grant date | Mar 12, 1985 |
| Priority date | — |
| Expiry date | Oct 27, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/101
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method of developing a latent electrostatic charge image formed on a photoconductor surface comprising the steps of applying a thin viscous layer of electrically charged toner particles to an applicator roller preferably by electrically assisted separation thereof from a liquid toner suspension, defining a restricted passage between the applicator roller and the photoconductor surface which approximates the thickness of the viscous layer, transferring the toner particles from the applicator roller to the photoconductor surface due to the preferential adherence thereof to the photoconductor surface under the dominant influence of the electric field strength of the electrostatic latent image carried by said photoconductive surface, the quantity of toner particles transferred being proportional to the relative incremental field strength of the latent electrostatic image. Apparatus is provided for carrying out the method of the invention which includes an applicator roller mounted for rotation in a container for toner suspension, an electrode arranged adjacent the circumferential surface of said roller to define an electrodeposition chamber therebetween and electrical connections bet…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.