Method of inspecting the nozzle discharge state, a discharge...

Details Method of inspecting the nozzle discharge state, a discharge... Method of inspecting the nozzle discharge state, a discharge...

2011-08-09

2011-08-09

Huffman, Julian D (Department: 2853)

Incremental printing of symbolic information

Ink jet

Controller

Reexamination Certificate

active

07992957

ABSTRACT:
A method of inspecting a discharge state of a nozzle prevents wrongly determining that discharge is normal even though fluid droplets are not discharged normally. In a fluid droplet discharge device such as an inkjet printer, a momentary induced current is produced when a charged ink droplet17clands on a head cap31with a potential difference. A voltage change detection unit39detects the induced current as a voltage change. A decision unit40determines that the ink discharge state is normal if the maximum amplitude L of the voltage change detected by the voltage change detection unit39in a first period S is greater than or equal to a first threshold value Q. If the amplitude of voltage change detected in a third period U after the specific period has passed goes to a second threshold value R, a decision cancellation unit41determines that noise is contained in the voltage change. If the ink discharge state is determined to be normal and noise is determined to be contained in the voltage change, inspection is repeated and the normal discharge decision is cancelled.

REFERENCES:
patent: 2007/0076030 (2007-04-01), Izuo
patent: 2007/0103500 (2007-05-01), Ootsuka
patent: 2007/0188538 (2007-08-01), Izuo
patent: 2003-118133 (2003-04-01), None
patent: 2007-083486 (2007-04-01), None
patent: 2007-112086 (2007-05-01), None
patent: 2007-118568 (2007-05-01), None
patent: 2007-130853 (2007-05-01), None

Affiliated with

Also associated with

Rating

Method of inspecting the nozzle discharge state, a discharge... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of inspecting the nozzle discharge state, a discharge..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of inspecting the nozzle discharge state, a discharge... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2780335