Air-bubble detection apparatus of ink jet recording head, and method and apparatus for restoring ink jet recording head
US5500657A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 3, 1992 |
| Grant date | Mar 19, 1996 |
| Priority date | — |
| Expiry date | Nov 3, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2202/07
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An air-bubble detection apparatus which detects the presence or absence of the occurrence of air bubbles in an ink passage by detecting if the voltage which develops across an electrostrictive vibrator by mechanical strain as a result of the ink in the ink passage of an ink jet recording head being moved, exceeds an excess voltage above a drive voltage. In addition, a method and apparatus for restoring the recording head to its operating condition, which prevents ink and energy from being wasted and makes efficient printing possible by restoring the recording head in which the occurrence of air bubbles is detected by using the above air-bubble detection apparatus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.