System for detecting inoperative inkjets in three-dimensional object printing using a test pattern and electrical continuity probes
US9073374B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 31, 2014 |
| Grant date | Jul 7, 2015 |
| Priority date | — |
| Expiry date | Mar 31, 2034 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J29/38
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A printer detects inoperative inkjets during printing of three dimensional objects. The printer includes an electrically conductive substrate onto which a printhead ejects building material in a test pattern. A plurality of electrically conductive members arranged in a pattern corresponding to the test pattern are moved a predetermined distance towards the substrate so ends of the members either contact the surface of the substrate or the building material on the substrate. An electrical current source coupled to the substrate produces a current in those members contacting the substrate. Thus, the inkjets corresponding to the members in which an electrical current is produced are identified as inoperative and the printing of an object can be suspended to take remedial action with regard to the printhead.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.