Method of controlling an operating temperature of a printhead in an ink jet cartridge assembly
US5790144A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 25, 1996 |
| Grant date | Aug 4, 1998 |
| Priority date | — |
| Expiry date | Sep 25, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/17503
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The invention is directed to a method of controlling an operating temperature of a printhead in an ink jet cartridge assembly, with the printhead having a plurality of ink emitting orifices and a plurality of corresponding heater elements. A cooling rate of the printhead which occurs during inoperation of the heater elements is established. A heating rate of the printhead which occurs as a result of firing at least one of the heater elements is determined. A period of time is set. A variable representing a control temperature of the printhead is calculated, dependent upon each of the cooling rate and the heating rate during the period of time. The operating temperature of the printhead is controlled, dependent upon the value of the variable representing the control temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.