Printing apparatus, control method therefor, printhead...

Details Printing apparatus, control method therefor, printhead... Printing apparatus, control method therefor, printhead...

2007-08-07

2007-08-07

Meier, Stephen (Department: 2853)

Incremental printing of symbolic information

Ink jet

Ejector mechanism

C347S023000

Reexamination Certificate

active

11002949

ABSTRACT:
A printing apparatus having a printhead for printing by discharging liquid on a printing medium performs a toggle preliminary discharge operation of alternately performing discharge from main nozzles and dummy nozzles in order to establish a good discharge state of the liquid from the main nozzles. The main nozzles and the dummy nozzles communicate with liquid chambers, which in turn communicate with a common liquid chamber. A control circuit for the printhead and a control method are also provided.

REFERENCES:
patent: 5343228 (1994-08-01), Takada
patent: 5774145 (1998-06-01), Morita et al.
patent: 5805182 (1998-09-01), Lee
patent: 6637865 (2003-10-01), Murakami et al.
patent: 6854820 (2005-02-01), Murakami et al.
patent: 8-295033 (1996-11-01), None
patent: 2000-71433 (2000-07-01), None
patent: 2001-129997 (2001-05-01), None
Counterpart U.S. Patent also cited.

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