System for detecting inoperative inkjets in three-dimensional object printing using a test pattern and an ultrasonic sensor
US9067446B1 · kind B1 · utility
4Cited by
0References
16Claims
0Family size
Assignee
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Key dates
| Filing date | Mar 31, 2014 |
| Grant date | Jun 30, 2015 |
| Priority date | — |
| Expiry date | Mar 31, 2034 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2002/16558
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A printer detects inoperative inkjets during printing of three dimensional objects. The printer includes a substrate onto which a printhead ejects building and support material in a test pattern. An ultrasonic sensor scans the substrate on the unprinted side and measures thicknesses at a plurality of locations on the substrate. The thickness measurements are used to identify inoperative inkjets in the printhead and the printing of an object can be suspended to take remedial action with regard to the printhead before formation of the object is completed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.