High thermal efficiency ink jet printhead
US6478410B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 23, 2001 |
| Grant date | Nov 12, 2002 |
| Priority date | — |
| Expiry date | Aug 23, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2002/14467
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
This present invention is embodied in a low-cost printing system including a printhead and an ink composition that provides photographic-quality resolution. The printhead of the present invention includes a high-density array of drop generators that eject ink drops having a low drop weight and that operate at a high frequency. Further, high-resistance firing resistors are used to provide minimum energy dissipation and the firing resistors are preferably thin-film resistors to ensure that a minimal amount of energy is needed to eject ink drops. The stability of the ink drop volume is maintained by including an overdamped structure within the ink drop generators that allow the ink chambers to fill up with ink slowly. The ink composition of the present invention includes an ink additive that prevents decel from occurring during sustained high-frequency printing bursts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.