US 12,319,069 B2
Liquid supply device, control method of liquid supply device, and printing apparatus
Tadashi Kyoso, Kanagawa (JP)
Assigned to FUJIFILM Corporation, Tokyo (JP)
Filed by FUJIFILM Corporation, Tokyo (JP)
Filed on May 3, 2023, as Appl. No. 18/311,885.
Application 18/311,885 is a continuation of application No. PCT/JP2021/040721, filed on Nov. 5, 2021.
Claims priority of application No. 2020-189984 (JP), filed on Nov. 16, 2020.
Prior Publication US 2023/0271426 A1, Aug. 31, 2023
Int. Cl. B41J 2/18 (2006.01); B41J 2/175 (2006.01)
CPC B41J 2/18 (2013.01) [B41J 2/17596 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A liquid supply device comprising:
a circulation flow passage through which a liquid is supplied from a liquid tank storing the liquid to a liquid jetting head and the liquid is collected from the liquid jetting head to the liquid tank;
a pump that is provided at the circulation flow passage and that generates a flow in the liquid in the circulation flow passage;
a memory that stores a command which is executed by a processor; and
the processor that executes the command stored in the memory,
wherein the processor is configured to execute, by controlling the pump, a sequence that includes first processing of generating a positive flow in a first direction in the liquid in a first flow passage including at least a part of the circulation flow passage and second processing of generating a negative flow in an opposite direction to the first direction in the liquid in the first flow passage,
in the first flow passage, a filter that removes a foreign substance in the liquid is disposed between the liquid tank and the liquid jetting head in the positive flow,
a flow rate of the liquid of the positive flow is higher than a flow rate of the liquid of the negative flow, and
the negative flow has a steady flow state.