Print head check method and image forming apparatus

Details Print head check method and image forming apparatus Print head check method and image forming apparatus

2006-10-02

2010-06-29

Nguyen, Lam S (Department: 2853)

Incremental printing of symbolic information

Ink jet

Controller

C347S009000, C347S081000

Reexamination Certificate

active

07744188

ABSTRACT:
A printer has a print head check unit that performs an ink ejection check to confirm whether or not ink is being ejected normally from nozzles, based on induced voltage generated when charged ink droplets are ejected onto a check area. Upon receipt of a print instruction (S100), the printer sets a flag F to 1 so as to start an ink ejection check and starts a paper feed process (S110). When the processes has been terminated (S120, S130), the printer starts printing. Accordingly, as an ink ejection check takes place concurrently with the paper feed process, the overall time required for the processes can be reduced, in comparison with any method in which the processes are executed separately. In this way, because of efficient implementation, the overall time required for the processes of the ejection check of the print recording liquid and an image forming process can be reduced. In addition, the ink ejection check may be performed in parallel with or partly overlapping with a process of receiving print data, a process of conversion into print data, a process of ejecting paper after printing, or a flashing process, etc.

REFERENCES:
patent: 6086190 (2000-07-01), Schantz et al.
patent: 6357849 (2002-03-01), Takizawa et al.
patent: 6998230 (2006-02-01), Schantz et al.
patent: 7118187 (2006-10-01), Arakawa
patent: 2005-035309 (2005-02-01), None

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