Ink jet recording apparatus and ink jet recording method

Patent metadata

Field	Value
Publication number	US-10632765-B2
Application number	US-201816021478-A
Country	US
Kind code	B2
Filing date	Jun 28, 2018
Priority date	Jul 4, 2017
Publication date	Apr 28, 2020
Grant date	Apr 28, 2020

Abstract

An ink jet recording apparatus includes: an image forming unit for forming an ink image containing a liquid component and a coloring material on a moving ink receiving medium; and a liquid absorbing unit having a liquid absorbing member which absorbs at least a part of the liquid component from the ink image by coming into contact with the ink image on the ink receiving medium, in which, in a moving direction of the ink receiving medium, a curvature radius R1 of the ink receiving medium at a contact start position between the liquid absorbing member and the ink image and a curvature radius R2 of the liquid absorbing member at the contact start position satisfy a relationship in which R1>0, R2<0, and |R1|≤|R2|.

First claim

What is claimed is:

1. An ink jet recording apparatus comprising:
a transfer member which rotates cyclically;
an image forming unit for forming an ink image containing a liquid component and a coloring material on the transfer member;
a liquid absorbing unit having a liquid absorbing member which absorbs at least a part of the liquid component from the ink image; and
a pressing member which presses the liquid absorbing member from a surface of the liquid absorbing member opposite to a surface of the liquid absorbing member being in contact with the ink image toward the transfer member,
wherein before a transfer operation of transferring the ink image formed on the transfer member to a print medium, in a state of the liquid absorbing member being pressed by the pressing member, when, in a moving direction of the transfer member, a curvature radius of the transfer member at a contact start position between the liquid absorbing member and the transfer member is defined as R 1 , and a curvature radius of the liquid absorbing member at the contact start position is defined as R 2 , (a) a center of the curvature radius R 2 is located on the transfer member side with respect to the liquid absorbing member at the contact start position, and (b) a relationship in which R 1 >0, R 2 <0, and |R 1 |<|R 2 | is satisfied.

2. The ink jet recording apparatus according to claim 1 , wherein |R 1 |/|R 2 | is 0.8 or more.

3. The ink jet recording apparatus according to claim 1 , wherein the liquid absorbing member is an endless liquid absorbing sheet.

4. The ink jet recording apparatus according to claim 1 , wherein the ink jet recording apparatus further comprises a transfer pressing member for transferring an ink image, in which at least a part of the liquid component is removed by the liquid absorbing member, onto a recording medium.

5. The ink jet recording apparatus according to claim 1 , wherein the ink receiving medium is a recording medium.

6. The ink jet recording apparatus according to claim 1 , wherein the liquid absorbing unit comprises a plurality of extending members for extending the liquid absorbing member and the pressing member presses a region between the plurality of extending members of the liquid absorbing unit.

7. An ink jet recording method comprising:
an image forming step of forming an ink image containing a liquid component and a coloring material on a transfer member which rotates cyclically; and
a liquid absorbing step of absorbing at least a part of the liquid component from the ink image by pressing, with a pressing member, a liquid absorbing member from a surface of the liquid absorbing member opposite to a surface of the liquid absorbing member being in contact with the ink image toward the transfer member,
wherein before a transfer operation of transferring the ink image formed on the transfer member to a print medium, in a state of the liquid absorbing member being pressed by the Dressing member, when, in a moving direction of the transfer member, a curvature radius of the transfer member at a contact start position between the liquid absorbing member and the transfer member is defined as R 1 , and a curvature radius of the liquid absorbing member at the contact start position is defined as R 2 , (a) a center of the curvature radius R 2 is located on the transfer member side with respect to the liquid absorbing member at the contact start position, and (b) a relationship in which R 1 >0, R 2 <0, and |R 1 |<|R 2 | is satisfied.

8. The ink jet recording method according to claim 7 , wherein |R 1 |/|R 2 | is 0.8 or more.

9. The ink jet recording method according to claim 7 , wherein the liquid absorbing member is an endless liquid absorbing sheet.

10. The ink jet recording method according to claim 7 , wherein the ink jet recording apparatus further comprises a transfer pressing member for transferring an ink image, in which at least a part of the liquid component is removed by the liquid absorbing member, onto a recording medium.

11. The ink jet recording method according to claim 7 , wherein the ink receiving medium is a recording medium.

Assignees

• Canon Kk

Inventors

• Takeuchi Keiichirou
• Inoue Koji
• Mouri Akihiro
• Ohnishi Toru

Classifications

• B41J2/0057

  where an intermediate transfer member receives the ink before transferring it on the printing material · CPC title

• B41J2/01 Primary

  Ink jet · CPC title

• B41J2002/012

  with intermediate transfer member · CPC title

• B41J29/17

  Cleaning arrangements · CPC title

• B41J11/007 Primary

  Conveyor belts or like feeding devices · CPC title