Droplet generator for a continuous stream ink jet print head
US6637871B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 16, 2002 |
| Grant date | Oct 28, 2003 |
| Priority date | — |
| Expiry date | May 16, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/162
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A droplet generator for a continuous stream ink jet print head includes an elongate cavity for containing the ink, nozzle orifices in a wall of the cavity for passing ink from the cavity to form jets. The nozzle orifices extend along the length of the cavity. An actuator is disposed on the opposite side of the cavity to the wall for vibrating the ink in the cavity by itself vibrating relative to the wall. The vibration is such that each jet breaks up into ink droplets at the same predetermined distance from the wall of the cavity. The thickness of the wall through which the nozzle orifices extend is less than 90 &mgr;m. The wall includes a planar member secured to the remainder of the droplet generator so as to form a boundary which extends around the nozzle orifices and within which the planar member is unsupported. The boundary includes first and second boundary lengths which extend along the length of the cavity on either side of the nozzle orifices. The distance between the first and second boundary lengths being less than 1700 &mgr;m.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.