Acoustic microstreaming in an ink jet apparatus
US4973980A · kind A · utility
39Cited by
4References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 30, 1989 |
| Grant date | Nov 27, 1990 |
| Priority date | — |
| Expiry date | Mar 30, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/16526
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An ink jet apparatus having a scanning head employing at least one ink jet with a variable volume chamber which includes an ink droplet ejecting orifice, and a transducer, having a length mode resonant frequency, adapted to expand and contract along an axis of elongation in response to an electric field substantially transverse to the axis of elongation for ejection of droplets on demand from the ink droplet ejecting orifice is acoustically microstreamed by exciting the transducers during non-printing periods to eliminate start-up problems and to maintain pigments or other particles in dispersion within the ink.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.