Patent ID: 11919318
Assignee: CANON KABUSHIKI KAISHA
Field: Textile and paper machines (Mechanical engineering)
Classification: CPC B | IPC B

Claim 19:
20. An inkjet printing apparatus comprising:
a print head comprising at least one ejection opening for ejecting ink;
a tank configured to store ink to be supplied to the print head;
a first flow path configured to flow ink from the tank to the print head;
a second flow path configured to flow ink so that ink which has flowed through the first flow path and through the second flow path flows through the first flow path again;
a decision unit configured to perform a decision operation for deciding an ink ejection state of the ejection opening;
a circulation unit configured to circulate ink in a circulation path including the first flow path and the second flow path so that ink which has flowed through the second flow path flows through the first flow path again; and
a control unit configured to cause the circulation unit to circulate ink and to cause the decision unit to perform the decision operation in a period of circulating ink by the circulation unit.