System for detecting inoperative inkjets in printheads ejecting clear ink using three dimensional imaging
US9168772B2 · kind B2 · utility
0Cited by
0References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 31, 2014 |
| Grant date | Oct 27, 2015 |
| Priority date | — |
| Expiry date | Mar 31, 2034 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2029/3935
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An apparatus detects inoperative inkjets during printing of three-dimensional objects. The apparatus includes a supply of substrate that is pulled to a position opposite a printhead to enable a test pattern of material to be formed on a portion of the substrate. That portion is then pulled past a laser sensor, which generates measurement data of the material on the portion of the substrate bearing the test pattern. These measurement data are analyzed to detect inoperative inkjets.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.