Liquid ejection apparatus, head unit and ink-jet cartridge
AssigneeCanon Kabushiki Kaisha
InventorsShuichi Murakami, Noribumi Koitabashi, Masaya Uetsuki, Yoshinori Nakajima
Life of this patent
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Abstract
A region to be covered by a cover plate (208) on an ejection opening forming surface (205) of an ink-jet head or an ink-jet head to which the cover plate (208) is installed are determined, on a basis of content of a rebounding mist generated upon ejection of an ink and a processing liquid in overlaying fashion. By this, in the ink-jet printing apparatus performing printing by ejecting the ink and the processing liquid for making the ink insoluble, deposition of the insoluble substance contained in the rebounding mist generated upon ejection of an ink and a processing liquid in overlaying fashion can be successfully prevented.
Claims83
An ink-jet printing apparatus for performing printing by using an ink-jet head ejecting an ink and by ejecting the ink toward a printing medium, comprising:
- covering means for covering a range around an ink ejecting opening in the ink-jet head at least when said ink-jet head performs ink ejection for printing.
An ink-jet printing apparatus for performing printing by using an ink ejecting portion for ejecting an ink and a processing liquid ejecting portion for ejecting a processing liquid for processing the ink, and by ejecting the ink and the processing liquid on a printing medium in overlaying manner, comprising:
- covering means for covering a range around at least one of an ink ejection opening of the ink ejecting portion and a processing liquid ejection opening of the processing liquid ejecting portion at least when said ink ejecting portion and said processing liquid ejecting portion perform ejection of the ink and the processing liquid, respectively, for printing.
A head unit for, ejecting an ink, comprising:
- a plate member covering around an ink ejection opening in the head unit.
A head unit having an ink ejecting portion for ejecting an ink and a processing liquid ejecting portion for ejecting a processing liquid for processing the ink, comprising:
- a plate member for covering a range around at least one of an ink ejection opening of the ink ejecting portion and a processing liquid ejection opening of the processing liquid ejecting portion.
An ink-jet cartridge having an ink-jet head for ejecting an ink and an ink tank integral with the ink-jet head and storing an ink to be supplied to the ink-jet head, comprising:
- plate member for covering a range around an ink ejection opening in said ink-jet head.
An ink-jet cartridge integrally having an ink ejecting portion for ejecting an ink, a processing liquid ejecting portion for ejecting a processing liquid for processing the ink, an ink tank storing the ink to be supplied to said ink ejecting portion and a processing liquid tank storing the processing liquid to be supplied to said processing liquid ejecting portion, comprising:
- a plate member covering a range around at least one of ink ejection opening of the ink ejecting portion and a processing liquid ejection opening of the processing liquid ejecting portion.
A liquid ejection apparatus for ejecting a liquid to a medium by using ejecting means, comprising:
- moving means for moving the ejecting means provided with ejection opening for ejecting the liquid relative to the medium;
- and
- air flow generating means for generating an air flow which is generated by utilizing relative movement of the ejecting means and the medium by means of said moving means, said air flow flowing along a direction away from the ejection opening in a vicinity space of an ejection opening forming surface of said ejecting means, for which said ejection opening is provided.
A liquid ejecting method for ejecting a liquid to a medium from an ejection opening while ejection means provided with said ejection opening for ejecting the liquid more relative to said medium, comprising the step of:
- ejecting the liquid with generating air flow which is the air flow generated by utilizing relative movement of said ejection means and the medium, said air flow flowing away from the ejection opening in a vicinity space of an ejection opening forming surface of said ejection means where said ejection opening is provided.
A liquid ejecting method for ejecting a liquid to a medium from an ejection opening while ejection means provided with said ejection opening for ejecting the liquid more relative to said medium, comprising the step of:
- ejecting the liquid with generating air flow which is the air flow floating the liquid between said ejection means and the medium and being generated by utilizing relative movement of said ejection means and the medium, said air flow flowing away from the ejection opening in a vicinity space of an ejection opening forming surface of said ejection means where said ejection opening is provided.
A liquid ejection apparatus for ejecting a liquid to a medium by using ejection means provided with an ejection opening for ejecting the liquid,
- wherein said ejecting means is provided with a projecting portion, and
- by means of said projecting portion and an air flow generated by air flow generating-means, there is generated the air flow flowing away from the ejection opening in a vicinity space of an ejection opening forming surface of said ejection means where said ejection opening is provided.
A liquid ejecting method comprising the steps of:
- ejecting a droplet having a volume less than or equal to 25 pl from ejecting means at a kinetic momentum less than or equal to 400 pl·m/s;
- and
- floating a mist generated by collision of the ejected droplet with the medium or a liquid on the medium in a space between said ejecting means and said medium.
A liquid ejection apparatus for ejecting a liquid to a medium by using ejecting means, comprising:
- moving means for moving said ejecting means provided with an ejection opening for ejecting the liquid relative to the medium;
- deposition range control means for generating an air flow by utilizing relative movement of said ejection means and the medium, said air flow flowing away from said ejection opening in a vicinity space of an ejection opening forming surface of said ejection means where said ejection opening is provided, so as to deposit mist at a position away from said ejection opening;
- and
- wiping means having a wiping member for wiping the ejection opening forming surface including said position way from the ejection opening.
An ejection recovery method in a liquid ejection apparatus for ejecting a liquid to a medium from an ejection opening while ejection means provided with said ejection opening for ejecting the liquid moves relative to the medium, comprising the step of:
- generating an air flow floating said liquid between said ejection means and the medium and being generated by utilizing relative movement of said ejection means and said medium, said air flow flowing away from the ejection opening in a vicinity sapce of an ejection opening forming surface of said ejection means where said ejection opening is provided, so as to deposit the floated liquid at a position away from said ejection opening;
- and
- wiping the ejection opening forming surface including said position.
A liquid ejection apparatus using ejection means for ejecting an ink and performing printing by ejecting the ink to a printing medium, comprising:
- wiping means having a wiping member for removing a foreign matter deposited on a ejection opening forming surface of said ejection means, said wiping means removing the foreign matter deposited on the ejection opening forming surface in a direction away from said ejection opening.
A liquid ejection apparatus using an ejecting portion for ejecting an ink and performing printing by ejecting the ink toward a printing medium, comprising:
- two stepped portions located at both sides of the ejection opening of said ejecting means;
- and
- wiping means having wiping member for wiping a region including said ejection opening between two stepped portions on an ejection opening forming surface of said ejection means.
Dependencies are inferred from the claim text.