Ink jet apparatus
US4742365A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 23, 1986 |
| Grant date | May 3, 1988 |
| Priority date | — |
| Expiry date | Apr 23, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/14209
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
In an ink jet print head wherein a plurality of pumping chambers are provided for receiving ink and individually discharging the ink on demand in droplet form. The pumping chambers are formed on a substrate and defined in part by a continuous film of piezoelectric material extending over the substrate. Electrodes are electrically coupled on opposite sides of the piezoelectric film and positioned to define a plurality of distinct, electrically pulsed ink droplet drive elements operatively associated individually with the plurality of pumping chambers. An orifice for each chamber causes ink to be ejected from the chamber in response to demand electrical pulsation of the drive element for the respective chamber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.