Nozzle test apparatus and method for thermal ink jet systems
US4590482A · kind A · utility
43Cited by
4References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 14, 1983 |
| Grant date | May 20, 1986 |
| Priority date | — |
| Expiry date | Dec 14, 2003 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2002/14387
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Apparatus and method for testing and determining the operating status of a plurality of ink-ejecting nozzles in a thermal ink jet array. An electrically conductive plate is placed adjacent the ink-ejecting orifices in a test position. An ink droplet appearing from an orifice will, for some brief moment, be in contact with both the orifice plate and the electrically conductive plate. The droplet completes a circuit with a conduction detector and allows current to flow thereby indicating an operative nozzle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.