Thermal ink jet print head method of manufacture
US4680859A · kind A · utility
48Cited by
3References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 3, 1986 |
| Grant date | Jul 21, 1987 |
| Priority date | — |
| Expiry date | Oct 3, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49401
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
In a thin film resistor substrate for a thermal ink jet printhead, there is provided an elongated ink feed slot for supplying ink to a plurality of heater resistors on the substrate. Ink flows from this slot vertically through the substrate and then laterally along predetermined ink flow paths in an orifice plate and barrier layer members to ink reservoirs above the heater resistors. In this manner ink flow pressure drops to all of the reservoirs are equal and thereby enhance ink pressure control for all of the reservoirs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.