Patent ID: 11964493
Assignee: SEIKO EPSON CORPORATION
Field: Textile and paper machines (Mechanical engineering)
Classification: CPC B | IPC B

Claim 7:
8. The liquid ejecting apparatus according to claim 7, wherein
the head unit has the filter, a third filter chamber including a third upstream chamber and a third downstream chamber, which are partitioned by the filter, and a third nozzle group having the plurality of nozzles ejecting the liquid supplied via the common flow path communicating with the third upstream chamber,
the nozzles forming the third nozzle group communicate with the nozzles forming the first nozzle group via the filter of the third filter chamber, the common flow path, and the filter of the first filter chamber, and communicate with the nozzles forming the second nozzle group via the filter of the third filter chamber, the common flow path, and the filter of the second filter chamber, and
when a maximum pressure, among pressures of the liquid in the head unit which are caused by a height difference between the plurality of nozzles included in the head unit and act on the gas-liquid interface formed in the nozzle of the third nozzle group, is defined as a pressure Ph2, the control unit does not form the gas-liquid interface in the hole provided in the filter of the third filter chamber in the pre-operation in a case where the withstand pressure Pn is greater than the pressure Ph2.