Toner transfer system
US4175265A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 28, 1976 |
| Grant date | Nov 20, 1979 |
| Priority date | — |
| Expiry date | Oct 28, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/163
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Apparatus for printing images on paper or other print medium by transferring toner on a magnetic tape onto the paper, using a voltage pulse applied between electrodes located respectively behind the tape and behind the paper. The electrode behind the tape is narrower than the tape, so that the opposite edge portions of the tape serve as insulators that prevent the formation of electric arcs between the electrodes. The voltage is applied in the form of a high voltage pulse on the order of 1500 volts lasting on the order of one millisecond, to transfer toner, and is followed by a sustained voltage on the order of 150 volts for preventing the toner particles from shifting position on the paper.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.