Drive method for an on-demand multi-nozzle ink jet head
US6378972B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 27, 1999 |
| Grant date | Apr 30, 2002 |
| Priority date | — |
| Expiry date | Aug 27, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2202/18
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
To increase the size of dot printed on a print medium with an on-demand multi-nozzle ink jet head, at least two unit pulses are applied in succession to a piezoelectric element which varies the volume of an ink chamber. The unit pulse has a pulse width substantially equal to a period of Helmholtz natural oscillation determined based on dimensions, materials, and physical properties of an ink channel and the piezoelectric element and other components relating to oscillation. An off duration between adjacent unit pulses applied in succession to the piezoelectric element is preferably set one fifth to one fourth of the unit pulse width.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.