Droplet volume modulation techniques for ink jet printheads
US5461403A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 10, 1993 |
| Grant date | Oct 24, 1995 |
| Priority date | — |
| Expiry date | May 10, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2002/14491
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An ink jet printhead and an associated method for operatively driving the ink jet printhead to cause the ejection of a volume modulatable droplet from an ink-carrying channel thereof partially defined by a piezoelectric sidewall actuator. The voltage applied across the sidewall actuator is raised from a rest voltage to a first voltage to deflect the sidewall actuator from a rest position to a first position and maintained at the first voltage for a first period of time. The voltage applied across the sidewall actuator is then dropped to a second voltage, lower than the rest voltage, to deflect the sidewall actuator from the first position, past the rest position, to a second position and maintained at the second voltage for a second period of time. The voltage applied across the sidewall actuator is then returned to the rest voltage to deflect the sidewall actuator back to the rest position. The first and second time periods are selected, relative to each other, to select a droplet volume for ink ejected from the ink-carrying channel. The voltage applied across the sidewall actuator is then returned to the rest voltage, thereby causing the ejection of a droplet of ink having the se…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.