Patent ID: 9505252
Filing Date: 2016-11-29
CPC Classification: B41J

Claim Text:
1. A recording apparatus recording an image on a recording medium, the recording apparatus comprising: a recording head including a plurality of nozzles ejecting ink onto the recording medium; a conveying unit that conveys the recording medium; a carriage on which the recording head is mounted, the carriage reciprocating the recording head for scanning in a direction crossing a conveying direction of the recording medium; a platen provided at a position facing the recording head along a scanning direction of the recording head, the platen supporting the recording medium; a sensor mounted on the carriage and detecting a density of an image recorded on the recording medium; and a detection controller that performs control to record test patterns on the recording medium and read densities of the test patterns using the sensor to thereby detect a non-ejection nozzle of the recording head, wherein the test patterns are formed by recording a line including a predetermined number of dots in predetermined areas for respective nozzles every plurality of times of conveyance of the recording medium; and wherein the detection controller reads the test patterns recorded on the recording medium using the sensor, calculates a position of a non-recorded portion in the test patterns, and specifies a position of the non-ejection nozzle based on the calculated position of the non-recorded portion and positions of the nozzles that record the test patterns.