Ink jet printing apparatus, print head recovery device and print head recovery method

摘要

In an ink jet printing apparatus prints an image by employing a print head capable of ejecting ink from ejection ports, a suction unit draws ink from the ejection ports into an interior of the cap by applying a suction force to the interior of a cap that is covering the ejection ports. An atmosphere communication unit exposes to the atmosphere the interior of the cap that is covering the ejection ports, and a pressure increase unit increases a pressure in an internal of the print head. A control unit permits the suction unit to apply the suction force to the interior of the cap, and permits the pressure increase unit to increase the pressure in the internal of the print head before the atmosphere communication unit exposes the interior of the cap to the atmosphere in a state where the ejection ports is covered with the cap.

主权项

1. An ink jet printing apparatus for printing an image, the apparatus comprising:
a print head having:
ejection ports capable of ejecting ink;an ink supply port, ink being supplied to the print head through the ink supply port; anda pressure introduction port, the pressure introduction port being different from the ink supply port; a cap configured to cover the ejection ports; a suction unit configured to draw ink from the ejection ports into an interior of the cap by applying a suction force to the interior of the cap; an atmosphere communication unit configured to expose to the atmosphere the interior of the cap; a pressure increase unit configured to increase a pressure in an internal of the print head through the pressure introduction port of the print head; a disconnecting unit capable of disconnecting an ink supply path connected to the ink supply port; and a control unit configured (i) to control the suction unit to apply the suction force to the interior of the cap, (ii) to control the pressure increase unit to increase the pressure in the internal of the print head in a state where the disconnecting unit disconnects the ink supply path, and (iii) to control the atmosphere communication unit to expose the interior of the cap to the atmosphere in a state where the ejection ports are covered with the cap.