Method of determining abnormality of nozzles in imaging...

Details Method of determining abnormality of nozzles in imaging... Method of determining abnormality of nozzles in imaging...

2006-09-05

2006-09-05

Nguyen, Lamson (Department: 2861)

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C347S030000

Reexamination Certificate

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07101013

ABSTRACT:
In an imaging apparatus having a head unit mounting thereon liquid droplet ejection heads with a plurality of ejection nozzles, a confirmation is made before starting an imaging operation as to whether or not liquid droplets are normally ejected from the respective ejection nozzles. This confirmation is made by using optical liquid droplet detectors having a light emitting element and a light receiving element. When ejection of liquid droplets from any of the ejection nozzles of liquid droplet ejection heads is determined to be abnormal in an ejection confirming operation, the ejection confirming operation is performed again. When the ejection of the liquid droplets from the same ejection nozzle is determined to be abnormal also in this ejection confirming operation, this ejection nozzle is judged to be abnormal.

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Communication from Korean Patent Office regarding related application.
Aug. 2, 2005 Communication from Japanese Patent Office regarding corresponding Japanese Patent Application No. 2003-204393.

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