公开(公告)号：US11654691B2

公开(公告)日：2023-05-23

申请号：US17457087

申请日：2021-12-01

Applicant: GOSANTECH CO., LTD.

Inventor： Sohyeon Park

IPC: B41J2/18

CPC classification number: B41J2/18

Abstract: An ink storage unit capable of stirring ink by ink circulation is proposed. The ink storage unit, which is configured to store ink for supplying the ink to an inkjet head including a plurality of nozzles to discharge the ink, includes an ink storage container having an inside space configured to store the ink therein, a head supply tube configured to supply the ink stored in the ink storage container to the inkjet head, a head recovery tube configured to recover remaining ink remained in the inkjet head to the ink storage container, a circulation tube configured to drain the ink through a first end thereof connected to the ink storage container and to receive the ink through a second end thereof connected to the ink storage container, and a circulation pump provided in the circulation tube to transfer the ink.