Thermal inkjet print head with integrated power supply fault protection circuitry for protection of firing circuitry
US6851786B2 · kind B2 · utility
0Cited by
5References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 10, 2002 |
| Grant date | Feb 8, 2005 |
| Priority date | — |
| Expiry date | Dec 10, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J29/393
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A printer has a print head with multiple nozzles and firing elements for corresponding nozzles. The print head receives one or more power supply inputs to operate the firing elements. The print head has power supply fault protection circuitry to guard against harmful and destructive effects on firing resistors resulting from power supply fluctuations. The power supply fault protection circuitry is integrated into a pen-based chip that also forms the firing elements and optionally the firing logic.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.