Method for using highly energetic droplet firing events to improve droplet ejection reliability
US6481823B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 29, 2000 |
| Grant date | Nov 19, 2002 |
| Priority date | — |
| Expiry date | Apr 29, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/16526
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The present invention includes as one embodiment a method of controlling an inkjet printhead assembly, including providing the printhead assembly having ink ejection elements that eject ink from a firing chamber through a nozzle and being energizable by an electrical pulse having a first predetermined energy, monitoring the printhead assembly to determine elapsed time since each ink ejection element on the printhead assembly has been fired, calculating a predetermined maximum amount of time that an ink ejection element is not operating using ink formulation and geometry of the nozzle and the firing chamber, comparing the elapsed time for each ink ejection element on the printhead assembly with the predetermined maximum amount of time and initiating high energy spitting at a second predetermined energy for the printhead assembly if the predetermined maximum amount of time has been exceeded for at least one of the ink ejection elements on the printhead assembly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.