Patent ID: 7762659
Filing Date: 2010-07-27
Classification: B41J

Abstract:
1. A recording apparatus comprising: a carriage having a recording head including a nozzle array with a plurality of nozzles thereon and being capable of reciprocably moving over a recording medium to a main-scanning direction; a recording medium conveying unit that conveys the recording medium to a sub-scanning direction intersecting the main-scanning direction; a first detecting unit disposed upstream than the recording head in the sub-scanning direction that detects at least a rear edge of the recording medium of the sub-scanning direction; a second detecting unit placed on the carriage that detects at least the rear edge of the recording medium downstream than the first detecting unit in the sub-scanning direction; and a recording control unit that causes the plurality of nozzles of the recording head to eject ink onto a recording surface on the recording medium based on recording data as the carriage is reciprocated to the main-scanning direction and that causes the recording medium conveying unit to convey the recording medium to the sub-scanning direction by a predetermined amount of conveyance, wherein the recording control unit stores as a first correction value a distance between a detecting point of the second detecting unit and the uppermost nozzle among the plurality of nozzles of the nozzle array of the recording head in the sub-scanning direction before performing the recording, the recording control unit, before performing the recording, causes the recording medium conveying unit to convey the recording medium, calculates a distance between the detecting point of the first detecting unit and the detecting point of the second detecting unit based on the amount of conveyance of the recording medium for a period between a time point at which the first detecting unit detects the rear edge and a time point at which the second detecting unit detects the rear edge and, stores the same as a second correction value, and the recording control unit starts a control to mask dot formation by the recording head at a time when the recording medium is conveyed by the amount of conveyance corresponding to a distance obtained by adding the second correction value to the first correction value after the rear edge of the recording medium being recorded is detected by the first detecting unit.