Pulsed constant current source for continuous tone resistive ribbon printers
US4800399A · kind A · utility
6Cited by
3References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 1, 1987 |
| Grant date | Jan 24, 1989 |
| Priority date | — |
| Expiry date | May 1, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/325
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A pulsed constant current circuit is disclosed for each electrode of a resistive ribbon thermal printer. The circuit is energized for a predetermined time and provides a constant current pulse through the electrode to the resistive ribbon to cause a predetermined amount of dye to transfer from the ribbon to thereby provide a continuous tone print.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.