Patent ID: 11872810
Assignee: BROTHER KOGYO KABUSHIKI KAISHA
Field: Textile and paper machines (Mechanical engineering)
Classification: CPC B  G | IPC B

Claim 6:
7. An ink discharge apparatus comprising:
a discharge head having a plurality of nozzle rows arranged in a first direction, each of the nozzle rows including a plurality of nozzles aligned in a second direction intersecting with the first direction; and
a controller,
wherein the controller is configured to execute:
a mode determining process to receive a print job and to determine whether a print mode is a low gap print mode or a high gap print mode based on the print job, the low gap print mode being a print mode where a distance between the nozzles and a discharge target medium is low gap, the high gap print mode being a print mode where the distance between the nozzles and the discharge target medium is high gap larger than the low gap; and

a number of discharge reducing process to reduce a total number of discharging ink per unit time from the nozzles as compared with the case of the low gap print mode, if the print mode is determined as the high gap print mode,
wherein the ink includes a black ink, a yellow ink, a cyan ink, and a magenta ink,
among the nozzles, the number of nozzles discharging the black ink is more than the number of nozzles discharging the yellow ink, more than the number of nozzles discharging the cyan ink, and more than the number of nozzles discharging the magenta ink, and
if the print mode is determined as the high gap print mode, the controller is configured to cause the total number of discharging ink per the unit time from the nozzles which discharge the yellow ink, the total number of discharging ink per the unit time from the nozzles which discharge the cyan ink and the total number of discharging ink per the unit time from the nozzles which discharge the magenta ink to be equivalent to the case of the low gap print mode, and to reduce the total number of discharging ink per unit the time from the nozzles which should discharge the black ink than the case of the low gap print mode.