Wideband ink jet modulator
US4032928A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 12, 1976 |
| Grant date | Jun 28, 1977 |
| Priority date | — |
| Expiry date | Aug 12, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49401
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A modulator for ink jet printers is provided for operation over a wide bandwidth of high frequency drop rates. The longitudinal dimensions of each part of the modulator are made small compared to the wavelength of the shortest standing longitudinal acoustic wave that may be produced in a structure of the same material as the part in question. A piezoelectric crystal is seated within a mount acoustically decoupled at the edges therof. An electrode is axially aligned with the crystal and placed in contact with the crystal. A short hollow cylinder forms an ink chamber axially aligned with the crystal. The end of the ink chamber opposite the crystal is closed by a front plate having a nozzle axially located therein. Plural nozzles may be utilized to produce parallel ink streams which break into droplets at substantially the same time and at a near uniform distance from the nozzles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.