Unit and image forming apparatus

Patent metadata

Field	Value
Publication number	US-2022244653-A1
Application number	US-202117409345-A
Country	US
Kind code	A1
Filing date	Aug 23, 2021
Priority date	Feb 2, 2021
Publication date	Aug 4, 2022
Grant date	—

Abstract

A unit includes: a developing device configured to develop an electrostatic charge image that is formed on a surface of an image carrier, as a toner image with a developer including a brilliant toner containing a flat brilliant pigment, the developer being accommodated in the developing device; and a fixing device configured to fix the toner image onto a surface of a recording medium at a fixing temperature of 130° C. or higher and 230° C. or lower that includes a fixing belt, a first roller and a second roller that are disposed inside the fixing belt and support the fixing belt while applying tension to the fixing belt, and a pressure roller, the first roller and the pressure roller sandwiching the fixing belt to form a nip portion.

First claim

What is claimed is:

1 . A unit comprising:
a developing device configured to develop an electrostatic charge image that is formed on a surface of an image carrier, as a toner image with a developer including a brilliant toner containing a flat brilliant pigment, the developer being accommodated in the developing device; and a fixing device configured to fix the toner image onto a surface of a recording medium at a fixing temperature of 130° C. or higher and 230° C. or lower that comprises a fixing belt, a first roller and a second roller that are disposed inside the fixing belt and support the fixing belt while applying tension to the fixing belt, and a pressure roller, the first roller and the pressure roller sandwiching the fixing belt to form a nip portion.

2 . The unit according to claim 1 , wherein the nip portion is flat.

3 . The unit according to claim 1 , wherein the fixing belt is rotationally driven at a linear velocity of 180 mm/sec or more and 450 mm/sec or less.

4 . The unit according to claim 2 , wherein the fixing belt is rotationally driven at a linear velocity of 180 mm/sec or more and 450 mm/sec or less.

5 . The unit according to claim 1 , wherein an absolute value of a difference between a surface hardness of the first roller and a surface hardness of the pressure roller is within 15°.

6 . The unit according to claim 2 , wherein an absolute value of a difference between a surface hardness of the first roller and a surface hardness of the pressure roller is within 15°.

7 . The unit according to claim 3 , wherein an absolute value of a difference between a surface hardness of the first roller and a surface hardness of the pressure roller is within 15°.

8 . The unit according to claim 4 , wherein an absolute value of a difference between a surface hardness of the first roller and a surface hardness of the pressure roller is within 15°.

9 . The unit according to claim 5 , wherein the surface hardness of the first roller is 35° or more and 45° or less.

10 . The unit according to claim 6 , wherein the surface hardness of the first roller is 35° or more and 45° or less.

11 . The unit according to claim 7 , wherein the surface hardness of the first roller is 35° or more and 45° or less.

12 . The unit according to claim 8 , wherein the surface hardness of the first roller is 35° or more and 45° or less.

13 . The unit according to claim 5 , wherein the surface hardness of the pressure roller is 40° or more and 50° or less.

14 . The unit according to claim 5 , wherein a pressure on the nip portion is 2.0 kgf/cm 2 or more and 7.0 kgf/cm 2 or less.

15 . The unit according to claim 5 , wherein a pressure on the nip portion is 4.0 kgf/cm 2 or more and 7.0 kgf/cm 2 or less.

16 . The unit according to claim 5 , wherein an outer diameter ratio of the first roller to the pressure roller is 0.9 or more and 1.3 or less.

17 . The unit according to claim 1 , wherein the brilliant toner has a viscosity at 130° C. of 100 Pa·s or more and 1000 Pa·s or less.

18 . The unit according to claim 1 ,
wherein the brilliant toner comprises brilliant toner particles, and a ratio C/D of an average maximum thickness C of the brilliant toner particles to an average circle-equivalent diameter D of the brilliant toner particles is within a range of 0.001 or more and 0.700 or less.

19 . An image forming apparatus comprising:
a toner image forming device that comprises an image carrier and a developing device configured to develop an electrostatic charge image that is formed on a surface of the image carrier, as a toner image with a developer including a brilliant toner containing a flat brilliant pigment, the developer being accommodated in the developing device; a transfer device configured to transfer the toner image formed on the surface of the image carrier to a surface of a recording medium; and a fixing device configured to fix the toner image onto the surface of the recording medium at a fixing temperature of 130° C. or higher and 230° C. or lower that comprises a fixing belt, a first roller and a second roller that are disposed inside the fixing belt and support the fixing belt while applying tension to the fixing belt, and a pressure roller, the first roller and the pressure roller sandwiching the fixing belt to form a nip portion.

Assignees

• Fujifilm Business Innovation Corp

Inventors

• Kamijo Yukiko
• Ohara Hideaki
• Omori Kenji
• Yamasaki Junko
• Nakashima Daisuke
• Ishihara Yuka
• Komuro Hitoshi

Classifications

• G03G9/08755 Primary

  Polyesters · CPC title

• G03G9/08797

  characterised by their physical properties, e.g. viscosity, solubility, melting temperature, softening temperature, glass transition temperature · CPC title

• G03G9/0926

  characterised by physical or chemical properties · CPC title

• G03G9/09

  Colouring agents for toner particles · CPC title

• G03G9/0821

  characterised by physical parameters (magnetic parameters G03G9/083) · CPC title