Damping means for an ink jet printing device
US4167742A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 1, 1978 |
| Grant date | Sep 11, 1979 |
| Priority date | — |
| Expiry date | May 1, 1998 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/025
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An ink jet printing device is provided of the type having a manifold (10) forming a liquid reservoir (11) with means (12) for supplying the reservoir (11) with liquid under pressure, a flexible orifice plate (13) forming one side of the reservoir (11) and containing a plurality of orifices (14) disposed in at least one row through which the printing liquid is expelled, means (18) for stimulating the orifice plate (13) to cause traveling wave vibrations there along so as to induce formation of uniform filaments and droplets from the orifice plate (13), means (15) for electrically charging selective ones of the droplets coming from the orifices (14) and further means (16) for catching the selectively charged droplets. A vibration damping means (21, 26, 32) is provided which engages an end portion or end portions of the orifice plate (13) beyond the end of the rows of orifices (14) for substantially completely damping out the traveling wave vibrations in the orifice plate (13) as they reach the end portions, with the damping means(21, 26, 32) having a V-shaped cross sectioned portions (22, 28, 36) in a plane parallel to the orifice plate (13) with the apex (23) of the V-shaped portion…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.