Back to results
US 10,207,506 B2Granted
Inkjet printing apparatus and recovery method of print head
AssigneeCanon Kabushiki Kaisha
InventorsOsamu Iwasaki, Tomoyuki Tenkawa, Atsushi Takahashi, Kei Kosaka
Life of this patent
Estimating the term…
Abstract
There is provided an inkjet printing apparatus that can execute a recovery process appropriate for a print head according to a use condition of the inkjet printing apparatus. Therefore a recovery operation is performed based upon both an elapsed time in a non-use state where the printing is not performed and an elapsed time from the previous recovery process.
Claims6
An inkjet printing apparatus comprising:
- a print head that ejects ink from an ejection port to perform a print operation, the print head having an ejection port surface on which the ejection port is formed;
- a sucking unit having a cap which contacts the ejection port surface to perform a sucking operation of sucking the ink from the ejection port;
- a first obtaining unit that obtains a first elapsed time from the end of a previous print operation;
- a second obtaining unit that obtains a second elapsed time from a previous sucking operation by the sucking unit;
- and
- a control unit that causes the sucking unit to perform the sucking operation in at least one of (i) a case where the first elapsed time is longer than a first threshold time and (ii) a case where the second elapsed time is longer than a second threshold time, the second threshold time being longer than the first threshold time,
- wherein if the second elapsed time is longer than a third elapsed time which is shorter than the second threshold time after performing the print operation, the control unit causes the sucking unit to perform the sucking operation.
4 more elements
A recovery method of a print head comprising:
- a printing step for ejecting ink from an ejection port of a print head to perform a print operation, the print head having an ejection port surface on which the ejection port is formed;
- a sucking step for contacting a cap with the ejection port surface to perform a sucking operation of sucking the ink from the ejection port of the print head;
- a first time obtaining step for obtaining a first elapsed time from the end of a previous print operation;
- and
- a second obtaining step for obtaining a second elapsed time from a previous sucking operation in the sucking step,
- wherein, the sucking operation in the sucking step is performed in at least one of (i) a case where the first elapsed time is longer than a first threshold time and (ii) a case where the second elapsed time is longer than a second threshold time, the second threshold time being longer than the first threshold time, and
- wherein if the second elapsed time is longer than a third elapsed time which is shorter than the second threshold time after performing the print operation, the sucking operation in the sucking step is performed.
4 more elements
Dependencies are inferred from the claim text.