Ink jet recording apparatus
AssigneeCanon Kabushiki Kaisha
InventorsNorifumi Koitabashi, Haruo Uchida, Hiroshi Tajika, Hiromitsu Hirabayashi
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Abstract
An ink jet recording apparatus, including a plurality of recording heads each having an ink outlet, a liquid passage communicating with the outlet and an ejection energy generating element for generating energy for ejecting ink through the outlet; a refresher for refreshing the ink in the passage by driving the ejection energy generating element to eject the ink when a recording operation of the apparatus is not performed; and a controller for changing a driving condition for the ejection energy generating element by the refresher for the recording heads.
Claims13
An ink jet recording apparatus for effecting recording on a recording material with a recording head having an ejection outlet for ejecting ink, the ink jet recording apparatus comprising:
- a covering member, having a discharge passage for discharging the ink, for covering the ejection outlet of the recording head;
- an elastic tube in fluid communication with the discharge passage of said covering member and having a passage for guiding the ink in a direction of discharging;
- a pressing member for deforming said elastic tube to partly close the passage of said elastic tube;
- a pressing member driver for rotatably driving said pressing member to move a portion of said elastic tube deformed by said pressing member while said covering member covers the ejection outlet of said recording head, thus producing a suction force for discharging the ink through the ejection outlet;
- and
- control means for controlling said pressing member driver to selectively provide a relatively larger suction force and smaller suction force, wherein said control means controls a rotation amount of said pressing member driver whereby a moving distance of said pressing member along said tube is changed to change the suction force.
An ink jet recording apparatus for effecting recording on a recording material with a plurality of recording heads each having an ejection outlet for ejecting ink, the ink jet recording apparatus comprising:
- covering members, each having a discharge passage for discharging the ink, for covering the ejection outlets of the respective recording heads;
- a plurality of elastic tubes in fluid communication with the discharge passages of said covering members and having passages for guiding the ink in a direction of discharging, respectively;
- a pressing member for deforming said elastic tubes to partly close the passages of said elastic tubes;
- a pressing member driver for rotatably driving said pressing member to move a portion of said elastic tubes deformed by said pressing member while said covering member covers the ejection outlet of said recording head, thus producing a suction force for discharging the ink through the ejection outlet;
- and
- control means for controlling said pressing member driver to simultaneously produce the suction force for each of said plurality of tubes, wherein said control means controls a rotation amount of said pressing member driver whereby a moving distance of said pressing member along said tubes is changed to change the suction force.
An ink jet recording apparatus for effecting recording on a recording material with a plurality of recording heads each having an ejection outlet for ejecting ink, the ink jet recording apparatus comprising:
- covering members, each having a discharge passage for discharging the ink, for covering the ejection outlets of the respective recording heads;
- a plurality of elastic tubes in fluid communication with the discharge passages of said covering members and having passages for guiding the ink in a direction of discharging, respectively;
- a pressing member for deforming said elastic tubes to partly close the passages of said elastic tubes;
- a pressing member driver for driving said pressing member to move a portion of said elastic tubes deformed by said pressing member while said covering member covers the ejection outlet of said recording head, thus producing a suction force for discharging the ink through the ejection outlet;
- and
- control means for controlling said pressing member driver to simultaneously produce the suction force for each of said plurality of tubes, wherein said control means controls a distance of movement of said pressing member along said tubes to change the suction force, and only one said pressing member and only one said driver are provided to press said plurality of tubes.
An ink jet recording apparatus for effecting recording on a recording material with a plurality of recording heads each having an ejection outlet for ejecting ink, the ink jet recording apparatus comprising:
- a covering member, having a discharge passage for discharging the ink, for covering the ejection outlets of the recording heads;
- an elastic tube in fluid communication with the discharge passage of said covering member and having a passage for guiding the ink in a direction of discharging;
- one pressing member for deforming said elastic tube to partly close the passage of said elastic tube;
- one pressing member driver for rotatably driving said pressing member to move a portion of said elastic tube deformed by said pressing member while said covering member covers the ejection outlet of said recording head, thus producing a suction force for discharging the ink through the ejection outlet;
- and
- control means for controlling said pressing member driver to simultaneously produce the suction force for each of said plurality of recording heads, wherein said control means controls a rotation amount of said pressing member driver whereby a moving distance of said pressing member driver along said tube is changed to change the suction force.
Dependencies are inferred from the claim text.