Liquid ejecting apparatus and liquid ejecting head

Patent metadata

Field	Value
Publication number	US-2016271950-A1
Application number	US-201615073764-A
Country	US
Kind code	A1
Filing date	Mar 18, 2016
Priority date	Mar 19, 2015
Publication date	Sep 22, 2016
Grant date	—

Abstract

There is provided a liquid ejecting apparatus and a liquid ejecting head in which mist does not close an ejection port so as to prevent any degradation of the reliability of ejection. In view of this, a ceiling surface is formed between a mist recovering unit and a gas blowing unit in a mist recovering mechanism, thus forming a recess. Inside of the recess are formed a suction port of the mist recovering unit and a gas blowing port of the gas blowing unit.

First claim

What is claimed is:

1 . A liquid ejecting apparatus including an ejecting unit configured to eject liquid to a medium through an ejection port and a moving unit configured to make a relative movement between the ejecting unit and the medium, the liquid ejecting apparatus comprising:
a recovering unit that is disposed downstream of the ejecting unit with respect to the relative movement of the medium and at a position at which the recovering unit can face the medium, the recovering unit being capable of recovering mist generated together with a main droplet of liquid ejected by the ejecting unit, the recovering unit including: a recovering portion disposed upstream with respect to the relative movement of the medium so as to recover the mist; and a blowing port that is disposed downstream of the relative movement of the medium with respect to the recovering portion and can blow gas, wherein at the recovering unit, a recess having a ceiling surface capable of facing the medium is formed between the recovering portion and the blowing port at a distance longer than a distance between an ejection port surface and the medium in a case where the ejection port surface of the ejection port of the ejecting unit faces the medium, and the recovering portion and the blowing port are disposed inside of the recess.

2 . The liquid ejecting apparatus according to claim 1 , wherein the blowing port is disposed at a position where the blowing port can face the medium.

3 . The liquid ejecting apparatus according to claim 2 , wherein the blowing port can face the medium at a distance shorter than a distance between the medium and the ceiling surface.

4 . The liquid ejecting apparatus according to claim 1 , wherein the ceiling surface is formed into an arcuate curve.

5 . The liquid ejecting apparatus according to claim 1 , wherein the blowing port can blow gas slantwise toward the medium and upstream with respect to the relative movement of the medium.

6 . The liquid ejecting apparatus according to claim 5 , wherein an angle at which gas is blown through the blowing port is 45° or more with respect to the medium.

7 . The liquid ejecting apparatus according to claim 1 , wherein the recovering portion is a suction port configured to suck and recover the mist under a negative pressure.

8 . The liquid ejecting apparatus according to claim 1 , wherein the recovering portion is provided with an electrode configured to recover the mist by static electricity.

9 . The liquid ejecting apparatus according to claim 1 , wherein the recovering portion is provided with a suction port configured to suck and recover the mist, and furthermore, includes a receiving portion configured to receive liquid in the receiving portion under in a vertical direction of the suction port.

10 . The liquid ejecting apparatus according to claim 4 , wherein the recovering portion is disposed at the center of the ceiling surface in a movement direction along an arc of the arcuate curve.

11 . The liquid ejecting apparatus according to claim 4 , wherein the recovering portion is disposed nearer the blowing port than the center of the ceiling surface in a movement direction along an arc of the arcuate curve.

12 . A liquid ejecting head configured to eject liquid through an ejection port to a medium that makes a relative movement, the liquid ejecting head comprising:
a recovering unit capable of recovering mist generated together with a main droplet of liquid to be ejected downstream with respect to the relative movement of the medium and at a position that the recovering unit can face the medium, the recovering unit including: a recovering portion disposed upstream with respect to the relative movement of the medium so as to recover the mist; and a blowing port that is disposed downstream of the relative movement of the medium with respect to the recovering portion and can blow gas, wherein at the recovering unit, a recess having a ceiling surface capable of facing the medium is formed between the recovering portion and the blowing port at a distance longer than a distance between an ejection port surface and the medium in a case where the ejection port surface having the ejection port of the liquid ejecting head faces the medium, and the recovering portion and the blowing port are disposed inside of the recess.

13 . The liquid ejecting head according to claim 12 , wherein the blowing port is disposed at a position at which the blowing port can face the medium.

14 . The liquid ejecting head according to claim 13 , the blowing port can face the medium at a distance shorter than that between the medium and the ceiling surface.

15 . The liquid ejecting head according to claim 12 , wherein the ceiling surface is formed into an arcuate curve.

16 . The liquid ejecting head according to claim 12 , wherein the blowing port can slantwise blow gas toward the medium upstream with respect to the relative movement of the medium.

17 . The liquid ejecting head according to claim 16 , wherein an angle at which gas is blown through the blowing port is 45° or more with respect to the medium.

18 . The liquid ejecting head according to claim 12 , wherein the recovering portion is a suction port configured to suck and recover the mist under a negative pressure.

19 . The liquid ejecting head according to claim 15 , wherein the recovering portion is disposed at the center of the ceiling surface in a movement direction along an arc of the arcuate curve.

20 . The liquid ejecting head according to claim 15 , wherein the recovering portion is disposed nearer the blowing port than the center of the ceiling surface in a movement direction along an arc of the arcuate curve.

Assignees

• Canon Kk

Inventors

• Imahashi Yusuke
• Arimizu Hiroshi
• Yamaguchi Nobuhito
• Miyakoshi Arihito
• Itoh Yoshinori
• Kubota Masahiko

Classifications

• B41J2/165 Primary

  Prevention {or detection} of nozzle clogging, e.g. cleaning, capping or moistening for nozzles · CPC title

• B41J2/1714

  Conditioning of the outside of ink supply systems, e.g. inkjet collector cleaning, ink mist removal (B41J2/08, B41J2/16517, B41J2/18 take precedence) · CPC title

• B41J2/185

  Ink-collectors; Ink-catchers · CPC title

• B41J2/01

  Ink jet · CPC title

• B41J2/16585 Primary

  for paper-width or non-reciprocating print heads · CPC title