Ink jet printing head, ink jet head cartridge and printing apparatus
US6412920B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 30, 1996 |
| Grant date | Jul 2, 2002 |
| Priority date | — |
| Expiry date | Oct 30, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2002/14379
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An ink jet printing head for effecting printing by ejection of ink includes a first electrothermal transducer having a heat generating resistor with a first area and wiring electrically connected with the heat generating resistor; a second electrothermal transducer having a second heat generating resistor with an area which is different from the area of the first heat generating resistor; wherein bubbles are produced in ink materials upon application of electric signals to the electrothermal transducers, by which different volumes of ink materials are ejected; wherein the first and second electrothermal transducers have substantially the same bubble production threshold voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.