Droplet volume calculation method for a thermal ink jet printer
US6517182B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 18, 2002 |
| Grant date | Feb 11, 2003 |
| Priority date | — |
| Expiry date | Jan 18, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/0458
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method for detecting the volume (Vol) of the droplets of ink (22) ejected by a thermal ink jet printhead (11), comprising a continuous driving cycle during which one or more thermal ejection actuators (17) of the printhead (11) are driven in pulsing fashion with a driving energy (Ep) progressively increasing from a condition where no droplets are ejected, while the printhead (11) is maintained at a substantially constant stabilization temperature (Ts), notwithstanding the progressive increase in driving energy (Ep), by means of a heat control member (28) which absorbs and dissipates an appropriate feedback energy. (Er) in the printhead (11); wherein the quantities, correlated to each other in the course of the continuous driving cycle, of respectively the driving energy (Ep) fed to the ejection actuator (17) and the feedback energy (Er) absorbed and dissipated by the heat control member (28), to maintain the printhead (11) at the stabilization temperature (Ts), are acquired for the purpose of defining an experimental characteristic (50) representative of the continuous driving cycle, and in which the two linear end portions (51, 53) of this characteristic (50) are compared with e…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.