Fixing device and image forming apparatus

Patent metadata

Field	Value
Publication number	US-2025102974-A1
Application number	US-202418641862-A
Country	US
Kind code	A1
Filing date	Apr 22, 2024
Priority date	Sep 27, 2023
Publication date	Mar 27, 2025
Grant date	—

Abstract

A fixing device includes: a first rotatable member; a second rotatable member disposed in contact with first rotatable member; a pressing member that is disposed along an inner circumferential surface of second rotatable member and presses the inner circumferential surface of the second rotatable member such that the second rotatable member is pressed against the first rotatable member; a sliding member interposed between an inner circumferential surface of second rotatable member and the pressing member; and a lubricant interposed between the inner circumferential surface of the second rotatable member and the sliding member. The inner circumferential surface of the second rotatable member contains a resin having a siloxane group and a conducting material treated with siloxane. A sliding surface of sliding member contains a resin having a siloxane group and a conducting material treated with siloxane. The lubricant contains an oil having a siloxane group in a main chain.

First claim

What is claimed is:

1 . A fixing device comprising:
a first rotatable member; a second rotatable member disposed in contact with the first rotatable member; a pressing member that is disposed along an inner circumferential surface of the second rotatable member and presses the inner circumferential surface of the second rotatable member such that the second rotatable member is pressed against the first rotatable member; a sliding member interposed between the inner circumferential surface of the second rotatable member and the pressing member; and a lubricant interposed between the inner circumferential surface of the second rotatable member and the sliding member, wherein the inner circumferential surface of the second rotatable member contains a resin having a siloxane group and a conducting material treated with siloxane, wherein a sliding surface of the sliding member contains a resin having a siloxane group and a conducting material treated with siloxane, and wherein the lubricant contains an oil having a siloxane group in a main chain.

2 . The fixing device according to claim 1 , wherein the conducting material contained in the inner circumferential surface of the second rotatable member and/or the conducting material contained in the sliding surface of the sliding member is carbon black.

3 . The fixing device according to claim 1 , wherein the content of the conducting material contained in a layer forming the inner circumferential surface of the second rotatable member with respect to 100 parts by mass of a resin contained in the layer forming the inner circumferential surface of the second rotatable member is 5 parts by mass or more.

4 . The fixing device according to claim 3 , wherein the content of the conducting material contained in the layer forming the inner circumferential surface of the second rotatable member with respect to 100 parts by mass of the resin contained in the layer forming the inner circumferential surface of the second rotatable member is 10 parts by mass or more and 50 parts by mass or less.

5 . The fixing device according to claim 1 , wherein the resin having a siloxane group and contained in the inner circumferential surface of the second rotatable member and/or the resin having a siloxane group and contained in the sliding surface of the sliding member is at least one of a siloxane-modified polyimide resin and a siloxane-modified polyamide-imide resin.

6 . The fixing device according to claim 1 , wherein the inner circumferential surface of the second rotatable member has a surface resistivity of 1.0×10 7 Ω/square or less.

7 . The fixing device according to claim 1 , wherein the sliding surface of the sliding member has a surface resistivity of 1.0×10 7 Ω/square or less.

8 . The fixing device according to claim 1 , wherein the resin having a siloxane group and contained in the inner circumferential surface of the second rotatable member and/or the resin having a siloxane group and contained in the sliding surface of the sliding member is resin particles.

9 . The fixing device according to claim 8 , wherein the sliding surface of the sliding member contains a heat-resistant thermoplastic resin, the resin particles of the resin having a siloxane group, and the conducting material treated with siloxane.

10 . The fixing device according to claim 9 , wherein the resin particles are thermosetting silicone resin particles.

11 . The fixing device according to claim 8 , wherein the inner circumferential surface of the second rotatable member contains the resin particles of the resin having a siloxane group, the conducting material treated with siloxane, and at least one resin selected from the group consisting of a polyimide resin, a polyamide-imide resin, a polyether ether ketone resin, and a polyphenylene sulfide resin.

12 . The fixing device according to claim 11 , wherein the resin particles are thermosetting silicone resin particles.

13 . An image forming apparatus comprising:
an image holding member; a latent image forming device that forms a latent image on a surface of the image holding member; a developing device that develops the latent image using a developer to form a toner image; a transfer device that transfers the developed toner image onto a recording medium; and the fixing device according to claim 1 , the fixing device fixing the toner image to the recording medium.

14 . An image forming apparatus comprising:
an image holding member; a latent image forming device that forms a latent image on a surface of the image holding member; a developing device that develops the latent image using a developer to form a toner image; a transfer device that transfers the developed toner image onto a recording medium; and the fixing device according to claim 2 , the fixing device fixing the toner image to the recording medium.

15 . An image forming apparatus comprising:
an image holding member; a latent image forming device that forms a latent image on a surface of the image holding member; a developing device that develops the latent image using a developer to form a toner image; a transfer device that transfers the developed toner image onto a recording medium; and the fixing device according to claim 3 , the fixing device fixing the toner image to the recording medium.

16 . An image forming apparatus comprising:
an image holding member; a latent image forming device that forms a latent image on a surface of the image holding member; a developing device that develops the latent image using a developer to form a toner image; a transfer device that transfers the developed toner image onto a recording medium; and the fixing device according to claim 4 , the fixing device fixing the toner image to the recording medium.

17 . An image forming apparatus comprising:
an image holding member; a latent image forming device that forms a latent image on a surface of the image holding member; a developing device that develops the latent image using a developer to form a toner image; a transfer device that transfers the developed toner image onto a recording medium; and the fixing device according to claim 5 , the fixing device fixing the toner image to the recording medium.

18 . An image forming apparatus comprising:
an image holding member; a latent image forming device that forms a latent image on a surface of the image holding member; a developing device that develops the latent image using a developer to form a toner image; a transfer device that transfers the developed toner image onto a recording medium; and the fixing device according to claim 6 , the fixing device fixing the toner image to the recording medium.

19 . An image forming apparatus comprising:
an image holding member; a latent image forming device that forms a latent image on a surface of the image holding member; a developing device that develops the latent image using a developer to form a toner image; a transfer device that transfers the developed toner image onto a recording medium; and the fixing device according to claim 7 , the fixing device fixing the toner image to the recording medium.

20 . An image forming apparatus comprising:
an image holding member; a latent image forming device that forms a latent image on a surface of the image holding member; a developing device that develops the latent image using a developer to form a toner image; a transfer device that transfers the developed toner image onto a reco

Assignees

• Fujifilm Business Innovation Corp

Inventors

• Omori Kenji
• Ohara Hideaki
• Yoshikawa Ryohei

Classifications

• G03G15/2064

  combined with pressure · CPC title

• G03G15/206

  Structural details or chemical composition of the pressure elements and layers thereof · CPC title

• G03G15/2025

  with special means for lubricating and/or cleaning the fixing unit, e.g. applying offset preventing fluid · CPC title

• C10M2229/025

  used as base material · CPC title

• C10M107/50

  containing silicon · CPC title