Printhead assembly having printhead modules in channel

Details Printhead assembly having printhead modules in channel Printhead assembly having printhead modules in channel

2005-11-22

2005-11-22

Nguyen, Thinh (Department: 2861)

Incremental printing of symbolic information

Ink jet

Ejector mechanism

Reexamination Certificate

active

06966628

ABSTRACT:
A printhead assembly (10) for an A4 pagewidth drop on demand printer includes a number of printhead modules (11) situated along a metal channel (16). The metal channel (16) is typically of a special alloy called “Invar 36”. Preferably the channel (16) is nickel plated to help match it to the coefficient of thermal expansion of silicon, being the major component of each individual printhead module (11). The channel (16) captures the printhead modules (11) in a precise alignment relative to each other and the similar coefficient of thermal expansion of the “Invar” channel (16) to the silicon chips allows similar relative movement during temperature changes.

REFERENCES:
patent: 6250738 (2001-06-01), Waller et al.
patent: 2000263768 (2000-09-01), None
patent: WO 01/66354 (2001-09-01), None
patent: WO 01/66355 (2001-09-01), None

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