Ink flow design to provide increased heat removal from an inkjet printhead and to provide for air accumulation
US6120139A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 30, 1998 |
| Grant date | Sep 19, 2000 |
| Priority date | — |
| Expiry date | Apr 30, 2018 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2202/07
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Disclosed is a printing device that overcomes the thermal problems of previous printheads caused by heat generation by providing better cooling of the printhead,avoids bubble accumulation near the printhead which can starve the printhead of ink and provides sufficient volume for air accumulation away from the printhead. The printing device including an outer housing, a substrate having a front surface on which is formed ink ejection chambers and having a back surface, an ink conduit having a distal end proximate to the back surface of the substrate, the ink conduit, the outer housing and the substrate defining an ink flow path to the ink ejection chambers and a bubble accumulation chamber in communication with the ink flow path such that bouyancy will tend to move bubbles that accumulate in the ink flow path into the bubble accumulation chamber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.