Actuator deprime for bubble control for ink jet printhead
US8801164B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 8, 2011 |
| Grant date | Aug 12, 2014 |
| Priority date | — |
| Expiry date | Jan 18, 2032 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/1707
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method and structure for depriming an ink jet printhead. To deprime ink from a printhead at a location between a nozzle (aperture) and a particulate filter (rock screen), a force (pressure) is applied to the ink. The pressure can either be a positive pressure applied to the nozzle from the outside of the aperture plate or a negative pressure (vacuum) applied at a location upstream from the particulate filter. Because openings within the particulate filter are each smaller than the nozzle, there exists a force which is sufficient to move a meniscus of the ink from the nozzle back to the particulate filter, but which is insufficient to move the meniscus beyond the particulate filter, for example due to a surface tension of the meniscus of the ink.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.