Continuous fluid recirculation and recirculation on-demand prior to firing for thermal ejection of fluid having concentration of solids
US11938727B2 · kind B2 · utility
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7References
15Claims
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Key dates
| Filing date | Feb 14, 2020 |
| Grant date | Mar 26, 2024 |
| Priority date | — |
| Expiry date | Apr 17, 2040 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2202/12
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Fluid is continuously recirculated through a thermal fluid-ejection printhead. Prior to firing a thermal resistor of the printhead to thermally eject a drop of the fluid through a nozzle of the printhead, the fluid is recirculated on-demand through a chamber of the printhead between the nozzle and the thermal resistor. The thermal resistor is fired to thermally eject the drop of the fluid through the nozzle. The fluid has a concentration of solids greater than 12% by volume.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.