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

Claim 4:
5. The liquid ejecting apparatus according to claim 1, further comprising:
a liquid storage unit storing the liquid;
a first passage configured to make the upstream chamber and the liquid storage unit communicate with each other;
a second passage configured to make the liquid storage unit and the upstream chamber communicate with each other;
an atmospheric passage communicating with the second passage;
a switching valve that is the gas introduction unit configured to switch the atmospheric passage between a communication state where the atmospheric passage communicates with the second passage and a non-communication state where the atmospheric passage does not communicate with the second passage; and
an introduction pump provided in the second passage, wherein
the control unit executes the pre-operation of controlling the switching valve such that the atmospheric passage is brought into the communication state, introducing the gas from the atmospheric passage into the upstream chamber via the second passage by driving the introduction pump, and forming the gas-liquid interface in the hole of the filter by returning the liquid in the upstream chamber to the liquid storage unit via the first passage.