Patent ID: 9731510
Date: 2017-08-15
CPC Classifications: B41J

Claim:
1. An inkjet printing apparatus with a plurality of inkjet heads having a plurality of inkjet nozzles being arranged in a row; a plurality of caps for the plurality of inkjet heads respectively; a plurality of lines in communication with the plurality of caps respectively; and a suction device sucking ink from the plurality of inkjet nozzles via the plurality of caps and the plurality of lines, the inkjet printing apparatus comprising: a housing having a plurality of external suction ports, an internal suction port and an ink-draw-off port, the plurality of external suction ports being connected to the plurality of caps via the plurality of lines; a switching section disposed in the housing and having an internal communication path in communication with the suction device; a connection switching device for selectively connecting the switching section to any port of the plurality of external suction ports or the internal suction port by moving the switching section to a position where the communication path is brought into communication with any port of the plurality of external suction ports or the internal suction port; and a suction path disposed out of the housing for connecting the internal suction port to the ink-draw-off port for sucking an interior of the housing, wherein the ink in the housing is discharged from the ink draw off port to a suction line through the suction path and the internal suction port.