Method and apparatus for ejecting particulate material including secondary electrode disposed transverse to a row of ejection electrodes
US6247797A · kind A · utility
1Cited by
3References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 17, 1998 |
| Grant date | Jun 19, 2001 |
| Priority date | — |
| Expiry date | Jul 17, 2018 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2002/061
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An apparatus for ejecting material from a liquid has an ejection location 91) with an electrode (3). An electrical potential is applied to the ejection location electrode to form an electric field at the location together; liquid is supplied to the ejection location which contains the particulate material to be ejected from the ejection location. A secondary electrode (5, 8) is disposed adjacent to the ejection location and the voltage on the ejection location electrode is controllable so as to reduce the sensitivity of the head to influence by external electric fields.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.