Printing apparatus and platen
AssigneeCanon Kabushiki Kaisha
InventorsTakahide Onuma, Tetsuji Kurata, Seiji Ogasawara, Masakazu Tsukuda, Yasunori Saito
Life of this patent
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Abstract
A platen includes: a plurality of supporting portions capable of supporting a sheet; negative pressure chambers, to which a negative pressure is supplied, so as to suck a sheet facing the supporting portions to the supporting portions; and ink receiver and that receive ink ejected from a printhead to the outside of the sheet supported by the supporting portions. The plurality of supporting portions are arranged in a sheet width direction (i.e., an X direction) transverse a sheet conveyance direction. The plurality of negative pressure chambers are disposed in a manner corresponding to the plurality of supporting portions, respectively.
Claims11
A printing apparatus comprising:
- a printhead configured to eject ink;
- a sheet conveying unit configured to convey a sheet in a first direction, and
- a platen unit configured to support the sheet to be printed by negative pressure suction,
- the platen unit comprising:
- a plurality of supporting portions each having a suction hole, arranged in a second direction perpendicular to the first direction;
- a plurality of negative pressure chambers, arranged in the second direction and disposed under the supporting portions in a gravitational direction, each configured to supply a negative pressure to one or more of the supporting portions through the suction hole;
- and
- an ink groove configured to receive ink ejected from the printhead to an outside of the sheet supported by the supporting portions,
- wherein the ink groove has a shape extending in the second direction and is disposed outside the supporting portions in the first direction, and a bottom of the ink groove locates lower than a top inner surface of each one of the negative pressure chambers in the gravitational direction.
A platen unit for supporting a sheet to be printed comprising:
- a plurality of supporting portions each having a suction hole to support the sheet by negative pressure suction, arranged in a sheet widthwise direction;
- a plurality of negative pressure chambers, arranged in the sheet widthwise direction and disposed under the supporting portions in a gravitational direction, each configured to supply a negative pressure to one or more of the supporting portions through the suction hole;
- and
- an ink groove configured to receive ink ejected from the printhead to an outside of the sheet supported by the supporting portions,
- wherein the ink groove has a shape extending in the sheet widthwise direction and is disposed beside the supporting portions, and a bottom of the ink groove locates lower than a top inner surface of each one of the negative pressure chambers in the gravitational direction.
Dependencies are inferred from the claim text.