Incremental printing of symbolic information – Ink jet – Fluid or fluid source handling means
Reexamination Certificate
2008-05-27
2008-05-27
Stephens, Juanita D. (Department: 2853)
Incremental printing of symbolic information
Ink jet
Fluid or fluid source handling means
C347S056000, C347S063000, C347S067000
Reexamination Certificate
active
07377629
ABSTRACT:
The present invention can suppress penetration of dust and foreign particles into a nozzle of an ink jet recording head, and can manufacture and make functional a structure therefor in an economic manner and with high reliability. An ink discharge energy generating element which generates energy for discharging ink is formed on the surface of an Si substrate. The Si substrate comprises an ink supply port which communicates ink from the rear face side of the substrate to the front face side of the substrate. The ink supply port comprises a filter structure having a plurality of minute through-holes formed on the Si substrate.
REFERENCES:
patent: 7147315 (2006-12-01), Keenan et al.
patent: 10-114070 (1998-05-01), None
patent: 2000-94700 (2000-04-01), None
Canon Kabushiki Kaisha
Fitzpatrick ,Cella, Harper & Scinto
Stephens Juanita D.
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