Patent ID: 8851618
Filing Date: 2014-10-07
Classification: B41J

Abstract:
1. An inkjet printing apparatus, which employs a print head wherein a plurality of nozzles for ejecting ink are arranged in a predetermined direction, and sequentially prints a plurality of images on a printing medium that is conveyed in a direction that intersects the predetermined direction, comprising: a maintenance unit configured to perform maintenance for the print head; a determination unit configured to perform a first determination, in which whether a nozzle is an ejection failed nozzle or not is determined based on a result obtained by scanning a first detection pattern during a period other than a sequential printing operation, and a second determination, in which whether a nozzle is an ejection failed nozzle or not is determined based on a result obtained by scanning a second detection pattern during the sequential printing operation; a storage unit configured to store first information, which corresponds to results obtained by the first determination, and second information that corresponds to results obtained by the second determination; a printing unit configured to employ a nozzle wherein an ejection failure has not occurred, and not employ an ejection failed nozzle, based on the first information and the second information, and perform the sequential printing, of the plurality of images on the printing medium; and a changing unit configured to maintain, in a case wherein the first determination is not performed after the maintenance by the maintenance unit has been performed, the first information unchanged, and change the second information from information indicating an ejection failed nozzle to information indicating a nozzle whereat an ejection failure has not occurred.