Printer and method adapted to reduce variability in ejected ink droplet volume
US6428134B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 12, 1998 |
| Grant date | Aug 6, 2002 |
| Priority date | — |
| Expiry date | Jun 12, 2018 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2202/17
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Printer and method adapted to reduce variability in ejected ink drop volume. A print head includes a plurality of nozzles integrally attached to the print head, each nozzle being capable of ejecting an ink droplet therefrom. At least one of the nozzles has an undesirable characteristic producing ink droplets of non-nominal volume. A waveform generator is connected to the nozzles for generating a plurality of waveforms to be supplied to the nozzles, so that the nozzles eject the ink droplets in response to the waveforms supplied thereto. Each waveforms has a plurality of pulses controlling ink droplet volume. A controller is provided for controlling the waveforms supplied to the nozzles and for transmitting the waveforms to the nozzles in order to eject the ink droplets so as to compensate for the non-nominal volume by controlling the number of pulses in the waveform. In this manner, all nozzles produce ink droplets of nominal volume regardless of physical or electrical variations between nozzles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.