Inkjet printing apparatus and inkjet printing method

摘要

An inkjet printing head prints an image on a printing medium located at a printing position facing the printing head, by a printing operation in which the printing head ejects ink onto the printing medium, and the printing head is capable of resuming the printing operation after suspension of the printing operation. A supporting unit supports the printing medium on which the image is printed by the printing head, and an adjusting unit is capable of adjusting a facing distance between the printing head and the supporting unit. A control unit controls the adjusting unit so that the facing distance is greater than that during the printing of a printed image, in case the printing operation is resumed and the printed image moves relative to the printing position. The control unit controls the adjusting unit based on the time elapsed between the suspension of the printing operation and the resumption of the printing operation, so that the facing distance is greater as the elapsed time is longer.

主权项

1. An inkjet printing apparatus for printing an image on a printing medium by a printing operation in which a printing head module ejects ink onto the printing medium during relative movement between the printing head module and the printing medium in a first direction, the printing head module having a plurality of nozzle arrays in each of which a plurality of nozzles capable of ejecting ink are arranged in a second direction crossing the first direction, the plurality of nozzle arrays being deviated from each other in the first direction, the apparatus being capable of resuming the printing operation after suspension of the printing operation, the apparatus comprising:
a supporting unit configured to support the printing medium on which the image is printed by the printing head module; an adjusting unit capable of adjusting a facing distance between the printing head module and the supporting unit; and a control unit configured to control the adjusting unit so that a facing distance between the printing head module and the supporting unit is greater than that during the printing operation in a case that the printing operation is suspended and the image printed on the printing medium moves to a plurality of printing positions corresponding to each of the plurality of nozzle arrays, and so that the facing distance decreases in accordance with a timing in which the image printed on the printing medium has passed through all of the plurality of printing positions in the first direction.