Toner projection system
US6561628B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 8, 1997 |
| Grant date | May 13, 2003 |
| Priority date | — |
| Expiry date | Jul 28, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2217/0025
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A system for projecting electrically conductive or semi-conductive toner directly on to print media using a direct electrostatic projection printing device that includes a projection control electrode positioned between a reference electrode and an orifice plate. A mechanism is provided for generating a first electric field between the reference electrode and the orifice plate to form a cloud of toner particles between the reference electrode and the orifice plate. A mechanism is also provided for intermittently generating a second electric field between the projection control electrode and the orifice plate to project toner particles through the orifice plate on to a sheet of paper.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.