Patent ID: 7118187
Filing Date: 2006-10-10
Classification: B41J

Abstract:
1. An inkjet recording apparatus, comprising: a recording medium feeding section to feed a recording medium on a platen; a recording head including a plurality of nozzles to eject ink droplets onto the recording medium; a recording head moving section to move the recording head in a direction perpendicular to a feeding direction of the recording medium; a mark recording section to record a plurality of marks, which are perpendicular to the feeding direction of the recording medium, on the recording medium using a plurality of the nozzles, while the recording head is moved by the recording head moving section; and a mark detecting unit which is moved together with the recording head and detects the plurality of marks; wherein the recording medium feeding section calculates and assumes a position which gives a smallest detection error from a distance interval calculated by a nozzle pitch of the recording head, referring to a position of each mark detected by the mark detecting unit; and wherein a feeding amount of the recording medium is determined based on the calculated and assumed position; and wherein the mark detecting unit comprises a light reflection type sensor, which includes: