Method of operating a multi-channel printhead using negative and positive pressure wave reflection coefficient and a driving circuit therefor
US6123405A · kind A · utility
23Cited by
12References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 19, 1996 |
| Grant date | Sep 26, 2000 |
| Priority date | — |
| Expiry date | Aug 19, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2202/10
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The selected ink channels of a drop-on-demand ink jet printer are caused to expand and then contract, ejecting ink droplets by the application of unipolar voltages first to selected channels and then to non-selected channels. Further unipolar voltages, delayed in time by 2L/c and scaled by a pressure wave reflection coefficient r of the nozzle, effect prompt cancellation of residual pressure waves so that adjacent channels are ready for actuation with minimum delay.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.