Ink jet printhead thermal working conditions stabilization method
US5767872A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 20, 1996 |
| Grant date | Jun 16, 1998 |
| Priority date | — |
| Expiry date | Jun 20, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/0458
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An ink jet printhead comprising a plurality of ejection resistors and at least one additional resistor, integrated on the same semiconductor substrate; the additional resistor is constituted by a material with a positive coefficient of variation of resistance with temperature of between 0.3 and 1.0%/.degree.C. and is used both for heating of the substrate and for measuring its temperature. Various circuits based on using the additional resistor are defined for implementing a method for stabilizing temperature of the substrate; also defined are a method for obtaining a stabilization temperature that remains constant with variation of the characteristics of the head and a method for setting the energetic operating point of the ejection resistors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.