Image forming apparatus
US5374949A · kind A · utility
42Cited by
9References
19Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Jul 26, 1993 |
| Grant date | Dec 20, 1994 |
| Priority date | — |
| Expiry date | Jul 26, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/346
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An apparatus and method for printing directly on plain paper, utilizing an arrayed control grid having a plurality of toner slots. An alternating electrostatic field in a space between a toner carrier and a backing electrode gives toner a vibrational motion to prevent a toner clog at the slot. The field is also formed to repel the clogged toner back to the toner carrier, or to fall it down on a paper on the backing electrode during no print is performed to clean the control grid. A constitution of conductive and dielectric materials for the members assures to form the field.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.