Ink jet recording head having improved filter system and recording apparatus using same
AssigneeCanon Kabushiki Kaisha
InventorMasashi Suda
Life of this patent
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Abstract
An ink jet recording apparatus that records on a recording medium by discharging ink from a discharge outlet contained in an ink jet recording head including an ink housing section in which ink is stored, a first filter disposed in a first ink path for supplying ink used for recording to the ink jet recording head from the ink housing section and a second filter disposed in a second ink path for supplying ink to the ink jet recording head from the ink housing section for recovering operation of the head. The size D.sub.I of the opening of the first filter, the size D.sub.O of the opening of the second filter and the minimum diameter D.sub.H of the head nozzle have the relationship of D.sub.I <D.sub.O <D.sub.H.
Claims13
An ink jet recording head comprising:
- an outlet for discharging ink onto a recording medium;
- a liquid chamber for storing ink to be discharged from said outlet;
- a first filter disposed in a first flow path in communication with said liquid chamber at a first location, said first filter having filter openings for ink flowing in said first flow path to said liquid chamber for a recovering operation of the recording head;
- and
- a second filter disposed in a second flow path in communication with said liquid chamber at a second location different from said first location, said second filter in the second flow path having filter openings for ink flowing to said liquid chamber for discharge from said outlet onto the recording medium and for ink flowing from said liquid chamber during the recovering operation,
- wherein a size D.sub.I of said openings of said first filter, a size D.sub.O of said openings of said second filter and a minimum diameter D.sub.H of said outlet, have a relationship D.sub.I <D.sub.O <D.sub.H.
An ink jet recording apparatus for recording on a recording medium by discharging ink from an outlet of an ink jet recording head, the apparatus comprising:
- an ink housing for storing ink;
- a first ink path communicating with said ink housing and said ink jet recording head to supply ink to said recording head at a first location for a recovering operation thereof;
- a first filter disposed in said first ink path and having filter openings for ink flowing in said first ink path;
- a second ink path at a second location different from said first location communicating with said ink housing and said ink jet recording head to supply ink to said ink jet recording head for discharge from said outlet for recording and to allow ink to flow from said ink jet recording head to said ink housing during the recovering operation,
- a second filter disposed in said second ink path and having filter openings for ink flowing in said second ink path,
- wherein a size D.sub.I of said openings of said first filter, a size D.sub.O of said openings of said second filter and a minimum diameter D.sub.H of said outlet, have a relationship D.sub.I <D.sub.O <D.sub.H.
Dependencies are inferred from the claim text.