Automatic character height control for ink jet printers
US5396273A · kind A · utility
6Cited by
8References
22Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 30, 1992 |
| Grant date | Mar 7, 1995 |
| Priority date | — |
| Expiry date | Jan 30, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/075
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A microprocessor-based control system for use in ink jet printers periodically measures flow rate of marking fluid, flow time or flight time of marking fluid drops and adjusts the voltage supplied to deflection electrodes-to maintain constant character height notwithstanding changes in the printer operating environment that would otherwise result in undesirable variation in character height. An alternate embodiment uses the flow time, flow rate or flight time information to adjust the charge amplifier gain, rather than the deflection voltage, to achieve the same result.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.