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US 11,999,167 B2Granted
Inkjet printing apparatus and recovery method
AssigneeCanon Kabushiki Kaisha
InventorsYoshinori Nakagawa, Takatoshi Nakano, Atsushi Takahashi, Takuya Fukasawa
Life of this patent
Estimating the term…
Abstract
Provided are an inkjet printing apparatus and a recovery method capable of suppressing ink thickening in the ejection openings in the suction process for the ejection openings. A vacuum wiper is moved being in contact with the ejection opening surface of the print head to perform a vacuum wiping process for the arrayed ejection openings sequentially. Ink is circulated in flow paths including the flow paths communicating with the ejection openings for which the vacuum wiping process has been finished.
Claims57
An inkjet printing apparatus comprising:
- a printing unit that includes arrayed multiple ejection openings configured to eject liquid and multiple flow paths each of which is communicating with the ejection opening, and that is configured to perform a printing process for printing an image on a print medium according to print data;
- a discharge unit configured to perform a discharge process for discharging liquid from the ejection openings, wherein the discharge process is different from the printing process;
- and
- a circulation unit configured to circulate liquid supplied to the printing unit, through the flow paths;
- wherein while the discharge process is performed by the discharge unit, the circulation unit circulates liquid in at least one of the flow paths.
2 more elements
An inkjet printing apparatus comprising:
- a printing unit that includes arrayed multiple ejection openings configured to eject liquid and that is configured to perform a printing process for printing an image according to print data,
- a discharge unit configured to perform a discharge process for discharging liquid from the ejection openings, wherein the discharge process is different from the printing process;
- and
- wherein while the discharge process is performed by the discharge unit, the printing unit performs preliminary ejection, which is liquid ejection different from ejection of the printing process.
1 more element
A recovery method comprising:
- moving at least one of a discharge unit and a printing unit relatively with respect to the other, the printing unit including arrayed multiple ejection openings configured to perform a printing process for ejecting liquid according to print data, the discharge unit being at a position facing an ejection opening surface of the printing unit, on which surface the ejection openings are formed;
- and
- discharging liquid from the ejection openings in order with the discharge unit, wherein the discharging liquid is different from the printing process,
- wherein while the discharge is performed for the ejection openings with the discharge unit, liquid is circulated in at least one flow path of the printing unit.
1 more element
A recovery method comprising:
- moving at least one of a discharge unit and a printing unit relatively with respect to the other, the printing unit including arrayed multiple ejection openings and being configured to perform a printing process for ejecting liquid according to print data, the discharge unit being at a position facing an ejection opening surface of the printing unit, on which the ejection openings are formed;
- and
- discharging liquid from the ejection openings in order with the discharge unit, wherein the discharging liquid is different from the printing process,
- wherein while the discharge is performed for the ejection openings with the discharge unit, preliminary ejection, which is liquid ejection different from ejection of the printing process is performed from the printing unit.
1 more element
An inkjet printing apparatus comprising:
- a printing unit that includes arrayed multiple ejection openings configured to eject liquid, and that is configured to perform a printing process for printing an image on a print medium according to print data;
- multiple flow paths, each of which has a first path for flowing the liquid from the outside of the printing unit to the inside of the printing unit and a second path for flowing the liquid from the inside of the printing unit to the outside of the printing unit;
- a discharge unit configured to perform a discharge process for discharging liquid from the ejection openings, wherein the discharge process is different from the printing process;
- and
- a circulation unit configured to circulate liquid supplied to the printing unit, through the flow paths;
- wherein while the discharge process is performed by the discharge unit, the control unit circulates liquid in at least one of the flow paths.
3 more elements
An inkjet printing apparatus comprising:
- a printing unit that includes arrayed multiple ejection openings configured to eject liquid, and that is configured to perform a printing process for printing an image on a print medium according to print data;
- multiple flow paths, each of which has a first path for flowing the liquid from the outside of the printing unit to the inside of the printing unit and a second path for flowing the liquid from the inside of the printing unit to the outside of the printing unit;
- a discharge unit configured to perform a discharge process for discharging liquid from the ejection openings, wherein the discharge process is different from the printing process;
- and
- wherein while the discharge process is performed by the discharge unit, the printing unit performs preliminary ejection, which is liquid ejection different from ejection of the printing process.
2 more elements
A recovery method comprising:
- moving at least one of a discharge unit and a printing unit relatively with respect to the other, the printing unit including arrayed multiple ejection openings configured to perform a printing process for ejecting liquid according to print data, the discharge unit being at a position facing an ejection opening surface of the printing unit, on which surface the ejection openings are formed, multiple flow paths having a first path for flowing the liquid from the outside of the printing unit to the inside of the printing unit and a second path for flowing the liquid from the inside of the printing unit to the outside of the printing unit;
- and
- discharging liquid from the ejection openings in order with the discharge unit, wherein the discharging liquid is different from the printing process,
- wherein while the discharge is performed for the ejection openings with the discharge unit, liquid is circulated in at least one of the flow paths.
1 more element
A recovery method comprising:
- moving at least one of a discharge unit and a printing unit relatively with respect to the other, the printing unit including arrayed multiple ejection openings and being configured to perform a printing process for ejecting liquid according to print data, the discharge unit being at a position facing an ejection opening surface of the printing unit, on which the ejection openings are formed, multiple flow paths having a first path for flowing the liquid from the outside of the printing unit to the inside of the printing unit and a second path for flowing the liquid from the inside of the printing unit to the outside of the printing unit;
- and
- discharging liquid from the ejection openings in order with the discharge unit, wherein the discharging liquid is different from the printing process,
- wherein while the discharge is performed for the ejection openings with the discharge unit, preliminary ejection, which is liquid ejection different from ejection of the printing process is performed from the printing unit.
1 more element
Dependencies are inferred from the claim text.