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

Claim 0:
1. An inkjet printing apparatus comprising:
a print head comprising at least one ejection opening for ejecting ink, a printing element for generating energy used for ejecting ink corresponding to the ejection opening, and a pressure chamber which is an area facing to the printing element, the ejection opening ejecting ink supplied in the pressure chamber;
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 from the outside of the pressure chamber to the inside of the pressure chamber and from the inside of the pressure chamber to the outside of the pressure chamber by supplying ink such that the ink flows from a first flow path for supplying ink to the pressure chamber of the print head to a second flow path, and circulate ink so that ink which has flowed through the second flow path flows through the first flow path again, the second flow path being communicated with the pressure chamber and different from the ejection opening and the first flow path; and
a control unit configured to cause the decision unit to perform the decision operation in a period of circulating ink by the circulation unit.