Thermal ink-jet printhead with an optimized fluid flow channel in each ejector
US5751317A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 15, 1996 |
| Grant date | May 12, 1998 |
| Priority date | — |
| Expiry date | Apr 15, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/1404
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A thermal ink-jet ejector having a fluid flow channel extending between an ink inlet and a nozzle for the ejection of liquid ink therefrom, includes a rear channel diffuser disposed between the heating element and the inlet, and/or a front channel diffuser disposed between the heating element and the nozzle. Each diffuser includes an arrangement of tapers which decrease the flow impedance of liquid ink flowing toward the nozzle, and increase the flow impedance of liquid ink flowing toward the inlet. The arrangement increases the kinetic energy of droplets being ejected, and also increases the speed of re-fill of the channel with liquid ink following ejection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.