Printing apparatus and platen

Patent metadata

Field	Value
Publication number	US-2018339530-A1
Application number	US-201816057011-A
Country	US
Kind code	A1
Filing date	Aug 7, 2018
Priority date	May 27, 2015
Publication date	Nov 29, 2018
Grant date	—

Abstract

A platen includes: a supporting portion that can support a sheet; a suction unit that sucks the sheet in such a manner as to attach the sheet to the supporting portion; a first ink receiver that receives ink ejected downstream of the leading end of the sheet passing the supporting portion; and a second ink receiver that receives ink ejected upstream of the trailing end of the sheet passing the supporting portion.

First claim

1 - 17 . (canceled)

18 . 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 configured to support the sheet at a position opposite to the printhead, wherein the platen comprises:
a supporting portion configured to support the sheet, the supporting portion having contact portions contacting the sheet and a recess which is surrounded by the contact portions and is provided with a first suction hole;
a first ink groove configured to receive ink ejected from the printhead, the first ink groove extending in a second direction crossing the first direction and being disposed downstream of the supporting portion with respect to the first direction;
a second ink groove configured to receive ink ejected from the printhead, the second ink groove extending in the second direction and being disposed upstream of the supporting portion with respect to the first direction; and
a second suction hole disposed between the first ink groove and the supporting portion.

19 . The printing apparatus according to claim 18 , wherein the second suction hole has a slit shape.

20 . The printing apparatus according to claim 18 , wherein an ink absorber having an ink receiving surface is embedded on the platen at a position lower than a position at which the supporting portion supports the sheet, and the second suction hole is formed at a position higher than the ink receiving surface.

21 . The printing apparatus according to claim 18 ,
wherein the contact portions include an upstream contact portion disposed upstream with respect to the first direction and extending in the second direction, a downstream contact portion disposed downstream of the upstream contact portion with respect to the first direction and extending in the second direction, and a side contact portion extending in the first direction and connecting the upstream contact portion and the downstream contact portion, and wherein the second suction hole is provided with the downstream contact portion.

22 . The printing apparatus according to claim 21 , wherein the platen further comprising a third suction hole which is provided with the side contact portion.

23 . The printing apparatus according to claim 22 , wherein the third suction hole has a slit shape.

24 . The printing apparatus according to claim 22 , wherein an ink absorber having an ink receiving surface is embedded on the platen at a position lower than a position at which the supporting portion supports the sheet, and the second suction hole and the third suction hole are formed at a position higher than the ink receiving surface.

Assignees

• Canon Kk

Inventors

• Kurata Tetsuji
• Ogasawara Seiji
• Tsukuda Masakazu
• Onuma Takahide
• Saito Yasunori
• Miyakoshi Arihito
• Kubota Masahiko
• Imahashi Yusuke
• Yamaguchi Nobuhito
• Arimizu Hiroshi
• Itoh Yoshinori

Classifications

• B41J13/10

  Sheet holders, retainers {, movable guides}, or stationary guides · CPC title

• B41J11/0085 Primary

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

• B41J2/175

  Ink supply systems {; Circuit parts therefor} · CPC title

• B41J2/235

  Print head assemblies · CPC title