Printing apparatus and platen

Patent metadata

Field	Value
Publication number	US-2018015741-A1
Application number	US-201715716889-A
Country	US
Kind code	A1
Filing date	Sep 27, 2017
Priority date	May 27, 2015
Publication date	Jan 18, 2018
Grant date	—

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.

First claim

1 .- 10 . (canceled)

11 . A printing apparatus comprising:
a printhead configured to eject ink; and a platen unit configured to support a sheet to be printed by the printhead, the platen unit including: a supporting portion having a suction hole; a negative pressure chamber disposed under the supporting portion in a gravitational direction configured to suck air through the suction hole; and an ink groove configured to receive ink ejected from the printhead to an outside of an end portion of the sheet supported on the supporting portions, wherein the ink groove is disposed adjacent the supporting portions and a bottom of the ink groove locates lower than a top inner surface of the negative pressure chamber in the gravitational direction.

12 . The printing apparatus according to claim 11 , wherein the platen unit further includes an ink absorber disposed on the ink groove, and a bottom of the ink absorber locates lower than the top inner surface in the gravitational direction.

Assignees

• Canon Kk

Inventors

• Onuma Takahide
• Kurata Tetsuji
• Ogasawara Seiji
• Tsukuda Masakazu
• Saito Yasunori

Classifications

• B41J11/0085 Primary

  Using suction for maintaining printing material flat (on rotatable drums B41J13/226) · CPC title

• B41J11/0065

  Means for printing without leaving a margin on at least one edge of the copy material, e.g. edge-to-edge printing · CPC title

• B41J2/185

  Ink-collectors; Ink-catchers · CPC title

• B41J11/06

  Flat page-size platens {or smaller flat platens having a greater size than line-size platens (B41J11/0085 takes precedence)} · CPC title

• B41J11/0005 Primary

  Curl smoothing, i.e. smoothing down corrugated printing material, e.g. by pressing means acting on wrinkled printing material · CPC title