Method and apparatus for charged particle generation
US5027136A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 16, 1990 |
| Grant date | Jun 25, 1991 |
| Priority date | — |
| Expiry date | Jan 16, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/415
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Method and apparatus for charged particle generation, particularly for use in electrographic imaging, in which a drive electrode and an isolation electrode are substantially in contact with opposite sides of a solid dielectric member, and a discharge electrode is placed on the same side of the solid dielectric member as the isolation electrode to define a discharge region. A high voltage time varying potential is imposed between the drive electrode and the discharge electrode to produce charged particles in the discharge region, and the isolation electrode is capacitively coupled to the drive electrode but otherwise is electrically isolated. The discharge electrode and isolation electrode are not coplanar and the discharge region does not border on the solid dielectric member. In a first embodiment, a dielectric shelf is placed intermediate an apertured discharge electrode and the isolation electrode, to facilitate the inception of discharges. In an alternative embodiment the discharge electrode is an elongate structure placed over the isolation electrode and supported by an apertured dielectric layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.