Patent ID: 8979243
Filing Date: 2015-03-17
Classification: B41J

Abstract:
1. An inkjet printing apparatus comprising: a head which is provided with a nozzle face and a plurality of nozzles, wherein the plurality of nozzles are provided on the nozzle face for discharging ink; a tank which stores ink and is connected with the head through a tube; a first pump which is connected with the tank and maintains the tank at a constant negative pressure; a cap for suction which covers a part of the plurality of nozzles on the nozzle face of the head; a second pump which is connected with the cap for sucking an inside of the cap; and a control means which controls to lower the negative pressure of the tank that is maintained by the first pump when the inside of the cap is sucked by the second pump, wherein the control means further controls suction of the first pump based on number of the plurality of nozzles without being clogged in a region where the cap is not covered.