公开(公告)号：US20240092082A1

公开(公告)日：2024-03-21

申请号：US18462581

申请日：2023-09-07

Applicant: SEMES CO., LTD.

Inventor： Chulwoo KIM ,  Beomjeong OH

IPC: B41J2/165 ,  B41J2/17 ,  B41J29/17

CPC classification number: B41J2/16517 ,  B41J2/1714 ,  B41J29/17

Abstract: A chemical liquid removing unit may remove a remaining chemical liquid from an ink jet head. The chemical liquid removing unit may include a surface tension providing part configured to remove the remaining chemical liquid from a nozzle face of the ink jet head using a surface tension, a driving part configured to move the surface tension providing part relative to the nozzle face the ink jet head, and a control part configured to control the driving part such that the surface tension providing part contacts the remaining chemical liquid whereas the surface tension providing part does not contact the nozzle face of the ink jet head.

公开(公告)号：US20210023836A1

公开(公告)日：2021-01-28

申请号：US16933029

申请日：2020-07-20

Applicant: Semes Co., Ltd.

Inventor： Chulwoo KIM ,  Sanghwa LEE ,  Beomjeong OH

IPC: B41J2/045

Abstract: In a printing method using an ink jet head, a chemical liquid may be discharged onto a substrate from a plurality of nozzles of the ink jet head. Discharging numbers of the chemical liquid from the plurality of nozzles may be identified and a cumulative discharging number of the chemical liquid from the plurality of nozzles may be calculated. The cumulative discharging number of the chemical liquid may be compared with a previously set limit discharging number of the ink jet head. A replacement time of the ink jet head may be determined if the cumulative discharging number of the chemical liquid exceeds the previously set limit discharging number.