Droplet discharging method and apparatus
US7137680B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 24, 2004 |
| Grant date | Nov 21, 2006 |
| Priority date | — |
| Expiry date | Jun 8, 2025 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2202/11
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A droplet discharging method for discharging a liquid inside a pressure chamber as a droplet from a nozzle, by applying a drive waveform to an actuator for causing change in volume of the pressure chamber filled with the liquid, is characterized by that: by taking volume of the pressure chamber as V, taking cross-sectional surface area of the nozzle as A, taking a length of the nozzle as l0, taking a density of the liquid to be discharged as ρ, taking viscosity coefficient of the liquid to be discharged as μ, and taking rate of transmission of a pressure wave transmitted through the liquid inside the pressure chamber as c, these respective factors are established in such a manner that a condition expressed by the following inequality expression is satisfied:
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.