Method and apparatus to control electrodes in a print unit
US5818480A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 14, 1995 |
| Grant date | Oct 6, 1998 |
| Priority date | — |
| Expiry date | Feb 14, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/4155
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The present invention relates to a method and means to control one or several electrodes in a print unit, comprising: at least one toner carrier, electrode means, having apertures at least partly surrounded by said electrodes, at least one back electrode. The electrodes are connected to driving means to apply different levels of energy, an on-potential, to at least partly open passages through the apertures to allow passage of toner particles or, an off-potential to prevent the passage of toner particles provided on the toner carrier through the apertures towards the back electrode. The driving means of each electrode intended to permit passage of said toner particles is brought in a high resistive state, and the electrode means of the electrodes intended to block the passage of said toner particles are brought in a low resistive state. Then all electrodes are applied a dynamic potential.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.