Drop-on-demand printhead
US4940996A · kind A · utility
Inventors
Key dates
| Filing date | Apr 28, 1989 |
| Grant date | Jul 10, 1990 |
| Priority date | — |
| Expiry date | Apr 28, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2202/20
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A drop-on-demand ink drop printhead is mounted fixed in a printer for selectively printing drops of ink in a print line. The printhead comprises a plurality of stacks of like print modules arranged in side-by-side relationship to form a number of laterally offset module layers. Each of the modules includes at least one group of uniformly laterally spaced ink ejectors, the groups in each layer being laterally spaced by the same amount such that drops from overlapping portions of two or more of the groups interleave to form a segment of the print line. Make-up ink and air supply ducting arrangements are provided for the modules in each stack.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.