Method and apparatus for controlling a multi-nozzle ink jet printhead
US6309058A · kind A · utility
Inventors
Key dates
| Filing date | Aug 20, 1999 |
| Grant date | Oct 30, 2001 |
| Priority date | — |
| Expiry date | Aug 20, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/115
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method of printing uses a multi-nozzle ink jet print head having a pressure modulator for causing streams of ink emitted from the nozzles to be broken up into individual droplets. The nozzles are divided into a plurality of groups of nozzles, and groups of charge electrodes correspond, each group of charge electrodes having a respective charge controller. In the method a modulation waveform is generated to operate the pressure modulator to cause droplets to be generated in each stream. The charge controllers are operated to supply a charge signal waveform to charge electrodes and charge droplets in the streams. The phase relationship of the charge signal waveform is adjusted relative to the modulation waveform.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.