Ink jet printer having print head with partial nozzle redundancy
US7338144B2 · kind B2 · utility
19Cited by
10References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 29, 2005 |
| Grant date | Mar 4, 2008 |
| Priority date | — |
| Expiry date | Aug 12, 2026 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/2146
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An ink jet printer has a print head with partial nozzle redundancy. All of the nozzles are used for printing, but at a less than maximum available ejection output. When a failed or impaired nozzle is identified, the normal ejection output is increased for neighboring nozzles, so that pixels to be printed by the impaired nozzle are printed by neighboring nozzles at previously blank pixels. Printing pixels by neighboring non-failed nozzles mitigates the visible effect of the nozzle failure and prevents loss of productivity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.