Method and apparatus for thermal control of an ink jet printhead
US6299273A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 14, 2000 |
| Grant date | Oct 9, 2001 |
| Priority date | — |
| Expiry date | Jul 14, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2202/17
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method of controlling a temperature of a print chip of a printhead in an ink jet printer includes providing the printer with a memory device. The print chip is provided with and at least one ink-jetting resistor. The printhead is provided with at least one substrate heater and a heatsink attached to the print chip. Power is applied to the substrate heater and/or the ink-jetting resistor. Temperature data associated with the print chip is recorded during the applying step. A thermal resistance value of the print chip to the heatsink and/or a thermal capacitance value associated with the printhead is calculated dependent upon the recorded temperature data. The thermal resistance value of the print chip to the heatsink and/or the thermal capacitance value associated with the printhead are stored in the memory device. A temperature of the heatsink is measured based upon the thermal resistance value of the print chip to the heatsink, the thermal capacitance value associated with the printhead, a temperature of the print chip, an ambient temperature, and/or a thermal resistance value associated with the heatsink. A level of power to be applied to the substrate heater is set dependent u…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.