Ink jet printhead with ink flow directing valves
US5278585A · kind A · utility
178Cited by
6References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 28, 1992 |
| Grant date | Jan 11, 1994 |
| Priority date | — |
| Expiry date | May 28, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/1642
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A thermal ink jet printhead has a flow directing one-way valve for reducing back-flow directed forces generated by the droplet ejecting ink vapor bubbles, so that most of the bubble generated forces are used to eject ink droplets from the printhead nozzles. The one-way valve is provided by patterning the etch resistant mask to form a flap located at a predetermined position along the ink channels between the heating elements and reservoirs, which is activated by bubble generated forces directed in the opposite direction from the printhead nozzles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.