Printhead heaters with short pulse time
US7328978B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 25, 2005 |
| Grant date | Feb 12, 2008 |
| Priority date | — |
| Expiry date | Jul 27, 2026 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2002/14491
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A thermal inkjet printhead with heater elements disposed in respective bubble forming chambers whereby each heater element is configured for receiving an energizing pulse to form a gas bubble in an ejectable liquid that causes the ejection of a drop of the ejectable liquid from the nozzle. The energizing pulse has duration less than 1.5 micro-seconds (μs) and the nozzles are “self cooling”, in the sense that in the sense that the only heat removal required by the chip is the heat removed by ejected droplets. The printhead is designed for operation with reduced pulse duration, so the amount of heat that diffuses into the liquid and the substrate prior to nucleation of the vapor bubble is reduced. This facilitates self cooling operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.