Inkjet printhead assembly
US6471340B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 12, 2001 |
| Grant date | Oct 29, 2002 |
| Priority date | — |
| Expiry date | Feb 12, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2202/03
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The present invention provides an improved inkjet printhead assembly adapted to reduce and/or withstand the collapse of ink back into the firing chambers. In one embodiment, the printhead assembly includes one or more firing chambers disposed on a porous substrate. An ink supply is connected to the substrate so that ink is allowed to flow through the pores of the substrate from the ink supply to the firing chamber. Thus, a substantial amount of the energy created by the impact of ink collapsing back into the firing chamber is expended within the pores of the substrate. In another embodiment, one or more firing resistors are formed in each firing chamber, and disposed adjacent the periphery of the firing chamber out of the direct impact path of collapsing ink.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.