Incremental printing of symbolic information – Ink jet – Controller
Reexamination Certificate
2006-10-31
2006-10-31
Patel, Vip (Department: 2861)
Incremental printing of symbolic information
Ink jet
Controller
C347S005000
Reexamination Certificate
active
07128385
ABSTRACT:
The invention provides a system and method for detecting the presence of an ink jet printhead when a printhead controller fails to properly identify an installed printhead using a printhead identification device. The system includes a printhead including heater resistors and control elements, and a controller connected to the printhead via address and data lines. When the controller fails to properly identify an installed printhead, the controller operates to bias the control elements in a predetermined manner via at least one address line, detect a signal via the data lines, and generate a signal indicative of the presence of the installed printhead.
REFERENCES:
patent: 6081280 (2000-06-01), Bolash et al.
patent: 6102515 (2000-08-01), Edwards et al.
Bush, III James L.
Ganadillo Marenz S.
Lowe Tommy O.
McKinley Bryan D.
Robertson Douglas L.
Aust Ronald K.
Lebron Jannelle M.
Lexmark International Inc.
Patel Vip
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