Pressurizing a heatable printhead while it cools

Details Pressurizing a heatable printhead while it cools Pressurizing a heatable printhead while it cools

2005-03-15

2008-08-19

Stephens, Juanita D (Department: 2853)

Incremental printing of symbolic information

Ink jet

Fluid or fluid source handling means

C347S022000, C347S025000, C347S017000

Reexamination Certificate

active

07413299

ABSTRACT:
A method of operating a drop generating printhead including heating the printhead, providing melted phase change ink to the printhead, allowing the printhead to cool, and while the printhead is cooling, pressurizing the phase change ink in the printhead with a pressure that is sufficient to substantially maintain meniscuses at the outlets of the nozzles of the printhead as the phase change ink in the printhead solidifies. Also disclosed is a method of operating a drop generating printhead including heating the printhead, and pressurizing solidified phase change ink in the printhead with a pressure that is sufficient to substantially maintain meniscuses at the outlets of the nozzles of the printhead as the phase change ink in the printhead melts.

REFERENCES:
patent: 5910810 (1999-06-01), Brooks et al.
patent: 6350012 (2002-02-01), Sarkissian et al.
Edward F. Burress, et al., Pressure Pump Systems , U.S. Appl. No. 10/753,045, filed Jan. 7, 2004.
Rodney B. Hill, et al., Purgeable Print Head Reservoir, U.S. Appl. No. 10/752,950, filed Jan. 7, 2004.

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