Miniature ink jet nozzle
US3972474A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 1, 1974 |
| Grant date | Aug 3, 1976 |
| Priority date | — |
| Expiry date | Nov 1, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P70/10
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
In an ink drop writing system a vibrating nozzle is used to form drops which are thereafter deflected electrostatically whereby characters or wave forms are written on paper by the deflected drops. In order to minimize the variations in drive voltage requirements for the transducer that vibrates the nozzle, caused by changes in ink parameters which cause variations in the velocity of sound through the ink that is used, and in order to minimize variations in the drop separation time from the ink stream, with drive frequency variations, the length of the nozzle is selected so that its mechanical resonance frequency is very much higher than the frequency at which the nozzle is used. As a result, the length of the nozzle is considerably shorter than the nozzle lengths which have been used heretofore.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.