Compact high-performance, high-density ink jet printhead
US6585352B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 16, 2000 |
| Grant date | Jul 1, 2003 |
| Priority date | — |
| Expiry date | Aug 16, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/14129
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A compact monochrome ink jet printhead having a staggered high-density arrangement of ink drop generators for high-performance printing. The present invention provides a high-performance design that enable high-resolution and high-speed printing while reducing cost due to an efficient use of printhead space. In particular, the compact, high-performance printhead of the present invention includes several thermally-efficient aspects that allow a large number of ink drop generators to be placed on a compact printhead while minimizing problems such as thermal excursions. In a preferred embodiment, the ink drop generator density on the compact printhead exceeds 10 ink drop generators per square millimeter and the compact printhead contains at least 350 nozzles. The ink drop generators are arranged in at least four parallel rows. Each row is staggered (or offset) relative to an adjacent row to provide a greater effective pitch that a non-staggered arrangement. The ink drop generators of the present invention include high resistance resistors and a thin passivation to increase thermally efficiency. Further thermal control is achieved by ejecting low-weight ink drops from the thermally-eff…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.