Patent ID: 9327505
Filing Date: 2016-05-03
CPC Classification: B41J

Claim Text:
1. A suction device for an ejection head provided with a plurality of nozzles, comprising: a cap that is configured to seal a nozzle surface provided with the nozzles, a decompression device, a suction passage provided between the cap and the decompression device, a first valve provided in the suction passage between the cap and the decompression device, a second valve provided in the suction passage between the first valve and the decompression device, a first section in the suction passage between the first valve and the second valve, the ejection head including the first section configured to be decompressed by the decompression device such that a volume of liquid is sucked out from the ejection head to the first section via the nozzles and the cap, and the volume of liquid sucked out being set to be equal to or less than a volume in the ejection head from the liquid supply port to the nozzles including the cavity.