IP Library Granted Patent US 11,061,344
Granted Patent B2
US 11,061,344 · App. 16/604,058 · Granted Jul 13, 2021

Toner, toner stored unit, image forming apparatus, and image forming method

Inventors: Toyoshi Sawada (Shizuoka, JP); Kazumi Suzuki (Shizuoka, JP); Natsuko Matsushita (Shizuoka, JP); Yu Naito (Shizuoka, JP)
Assignee: Ricoh Company, Ltd.
G03G9/0926G03G9/08795G03G9/09G03G9/0906G03G15/163
View Patent ↗
Loading inventors, assignments & file history…
Monitor This Case
Get email alerts when status or documents change.
Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 11,061,344
App. No.
16/604,058
Granted
Jul 13, 2021
Kind
B2
Abstract

Provided is a toner including a binder resin and a colorant, wherein the colorant includes Solvent Red 49, and an acid value of the toner is 9.0 mgKOH/g or greater but 30.0 mgKOH/g or less.

Claims (32)

1. A toner comprising:

a binder resin; and

a colorant,

wherein the colorant includes Solvent Red 49, and

an acid value of the toner is 9.0 mgKOH/g or greater but 30.0 mgKOH/g or less.

2. The toner according to claim 1 ,

wherein the colorant includes Pigment Yellow 101 in addition to Solvent Red 49.

3. The toner according to claim 2 ,

wherein the toner includes a release agent, and

an amount of Pigment Yellow 101 is from 0.1 percent by mass through 0.5 percent by mass relative to a total amount of the binder resin and the release agent in the toner.

4. The toner according to claim 1 ,

wherein the binder resin includes a resin having a chloroform-insoluble component and an acid value of the resin having a chloroform-insoluble component is 20 mgKOH/g or greater but 40 mgKOH/g or less.

5. The toner according to claim 1 ,

wherein the toner includes inorganic particles for internal addition.

6. The toner according to claim 1 ,

wherein the toner includes a release agent, and

an amount of Solvent Red 49 is from 0.5 percent by mass through 2.0 percent by mass relative to a total amount of the binder resin and the release agent in the toner.

7. A toner stored unit comprising:

the toner according to claim 1 stored in the toner stored unit.

8. An image forming apparatus comprising:

an electrostatic latent image bearer;

an electrostatic latent image forming unit configured to form an electrostatic latent image on the electrostatic latent image bearer;

a developing unit storing a toner and configured to develop the electrostatic latent image formed on the electrostatic latent image bearer with the toner to form a toner image;

a transferring unit configured to transfer the toner image formed on the electrostatic latent image bearer to a surface of a recording medium; and

a fixing unit configured to fix the toner image transferred to the surface of the recording medium,

wherein the toner is the toner according to claim 1 .

9. An image forming method comprising:

forming an electrostatic latent image on an electrostatic latent image bearer;

developing the electrostatic latent image formed on the electrostatic latent image bearer with a toner to form a toner image;

transferring the toner image formed on the electrostatic latent image bearer to a surface of a recording medium; and

fixing the toner image transferred to the surface of the recording medium,

wherein the toner is the toner according to claim 1 .

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Oct 9, 2019
From: SAWADA, TOYOSHI; SUZUKI, KAZUMI; MATSUSHITA, NATSUKO; NAITO, YU
To: RICOH COMPANY, LTD.
Reel/Frame 050668/0826 →
Priority Claims (1)
JP JP2017-078710 · Apr 12, 2017 · national
Continuity (1)
Related Publication 20210018855A1 · Jan 21, 2021
Cited By (1)
US 12,332,599