Ink jet recording by superimposing inks of different densities
AssigneeCanon Kabushiki Kaisha
InventorsHiroshi Tajika, Noribumi Koitabashi, Atsushi Arai, Hiromitsu Hirabayashi
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Abstract
This invention is a recording head cartridge which includes a plurality of inks having a density difference for an ink of one color, includes recording heads on a single substrate or in an adjacent aligned state, and integrates ink tanks for the plurality of inks, so as to reliably perform gradation recording while achieving a simple control circuit, and improvement in operability upon replacement. This invention also provides a structure in which ink tanks in the cartridge are integrated to determine a light/depth printing order, and have different volumes so as to improve advantages of replacement.
Claims15
An ink jet cartridge comprising:
- a plurality of recording heads each including a plurality of nozzles arranged in an array along a first direction, said plurality of recording heads being arranged along a second direction;
- and
- a plurality of ink tanks each connected to respective ones of said plurality of recording heads, said plurality of ink tanks supplying ink to said plurality of recording heads;
- wherein said plurality of recording heads have at least a first recording head which discharges a first ink, said first ink having a first density, and a second recording head which discharges a second ink, said second ink having a second density which is relatively lower than the first density, the first recording head and the second recording head being integrally formed adjacent to each other, and
- wherein when said first recording head and said second recording head discharge said first ink and said second ink, respectively, discharge of said first ink always precedes discharge of said second ink, with respect to the second direction.
An ink jet cartridge comprising:
- a plurality of recording heads;
- and
- a plurality of ink tanks in combination with the plurality of recording heads, the ink tanks for supplying ink to said plurality of recording heads, each of said plurality of recording heads including a nozzle array having a plurality of nozzles arranged in an array along a first direction, and each said recording head being arranged along a second direction,
- wherein said plurality of recording heads discharge at least black, yellow, magenta and cyan inks,
- wherein a first tank of said plurality of tanks contains a first ink having a high density, and a second tank of said plurality of tanks contains a second ink having a substantially same color as that of the first ink and a low density,
- wherein said plurality of recording heads are adjacently positioned and formed integrally with each other for use, and
- wherein said first ink and said second ink are discharged and overlapped to record on a recording medium in a sequence of said first ink having the high density and said second ink having the low density with respect to the second direction.
An ink jet recording apparatus, comprising:
- plural recording heads corresponding to each of at least black, cyan, magenta and yellow inks, and
- a carriage on which said plural recording heads are movably mounted to execute recording,
- wherein each of said plural recording heads comprises a plurality of nozzle arrays, each nozzle array having a plurality of nozzles arranged in an array along a first direction, said plurality of nozzle arrays being arranged along a second direction substantially perpendicular to the first direction,
- wherein each of said recording heads discharges at least two kinds of ink including a first density ink and a second density ink, the second density ink having a density which is relatively lower than the first density ink, and
- wherein the first density ink and the second density ink are always discharged and overlapped to record in a sequence of said first density ink and then said second density ink with respect to the second direction.
Dependencies are inferred from the claim text.