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US 6,783,224 B2Granted
Ink-jet printing apparatus
AssigneeToshiba Tec Kabushiki Kaisha
InventorsKoichi Adachi, Minoru Koyata, Hidehiro Watanabe, Atsushi Kubota
Life of this patent
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Abstract
At least two or more than two ink-jet recording heads provided with respective discharge ports for discharging ink are arranged in the direction of conveyance of recording medium. The inks filled in the respective ink-jet recording heads are made to show different surface tensions. With this arrangement, as inks are discharged onto the recording medium that is conveyed by a conveyor under the control of a drive section, the image formed by the inks discharged onto the recording medium shows an improved quality.
Claims10
An ink-jet printing apparatus comprising:
- at least two ore more than two ink-jet recording heads provided with respective discharge ports for discharging ink and arranged in the direction of conveyance of a recording medium;
- conveying means for conveying a recording medium;
- and
- a drive section which drives the ink-jet recording heads so as to discharge inks toward the recording medium being conveyed by the conveying means, wherein
- the inks discharged from the respective ink-jet recording heads are of a same type, and surface tensions of the inks discharged respectively from the two or more than two ink-jet recording heads decrease in an order of arrangement of the ink-jet recording heads in a direction of conveyance of the recording medium.
2 more elements
Dependencies are inferred from the claim text.