Heater stack having resistive layer with underlying...

Details Heater stack having resistive layer with underlying... Heater stack having resistive layer with underlying...

2008-12-29

2011-10-25

Lepisto, Ryan (Department: 2883)

Incremental printing of symbolic information

Ink jet

Ejector mechanism

C347S054000, C347S055000, C347S056000, C347S060000, C347S061000, C347S063000, C347S064000, C347S065000

Reexamination Certificate

active

08042912

ABSTRACT:
A heater stack includes first strata configured to support and form a fluid heater element responsive to energy from repetitive electrical activation and deactivation to fire repetitive cycles of heating and ejecting fluid from an ejection chamber above the fluid heater element and second strata overlying the first strata and contiguous with the ejection chamber to provide protection of the fluid heater element. The first strata includes a substrate and a heater substrata overlying the substrate and including a resistive layer having lateral portions spaced apart, a central portion extending between the lateral portions and defining the fluid heater element, and transitional portions interconnecting the central portion and lateral portions and elevating the central portion relative to the lateral portions and above the substrate to form a gap between the lateral portions and between the central portion and substrate insulating the substrate from the fluid heater element.

REFERENCES:
patent: 6457815 (2002-10-01), Miller et al.
patent: 6464343 (2002-10-01), Coventry et al.
patent: 6485132 (2002-11-01), Hiroki et al.
patent: 7195343 (2007-03-01), Anderson et al.
patent: 7841702 (2010-11-01), Guan et al.
patent: 2010/0165055 (2010-07-01), Reitmeier

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