Fluid drop projecting head using taper-shaped chamber for generating a converging surface wave
US6328421A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 20, 1996 |
| Grant date | Dec 11, 2001 |
| Priority date | — |
| Expiry date | Aug 20, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2002/14387
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A fluid drop projecting apparatus which can fly, one by one, fluid drops far smaller than the opening bore from which the drops are projected, and moreover cay readily vary the size of the fluid drops, is provided. To this end, surface waves travelling toward a fluid drop projecting point are applied on the free surface of fluid in a fluid drop projecting chamber having an opening. The surface waves are generated by a surface wave generator including the fluid drop projecting chamber, a diaphragm and a piezo actuator. As the surface waves are generated by the surface wave generator at substantially equal distances from a fluid drop projecting point, the height of the surface waves gradually increases, amplified by their interference, and fluid drops are separated at and projected from the fluid drop projecting point.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.