IP Library Granted Patent US 8,475,986
Granted Patent B2
US 8,475,986 · App. 13/042,845 · Granted Jul 2, 2013

Toner

Inventor: Masahiro Oki (Iruma, JP)
Assignee: Seiko Epson Corporation
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 8,475,986
App. No.
13/042,845
Granted
Jul 2, 2013
Kind
B2
Abstract

The invention is to provide a toner with a small difference of charging properties and an excellent cleaning property. The toner includes toner particles of cylindrical bodies.

Claims (10)

1. A toner comprising a plurality of toner particles, wherein the toner particles are formed of a resin material, a coloring agent, and cylindrical bodies comprising silicate.

2. The toner according to claim 1 , wherein the toner particles further includes wax.

3. The toner according to claim 2 , wherein the wax is kept in an empty portion of the cylindrical bodies.

4. The toner according to claim 1 , wherein the content of the cylindrical bodies is 0.2 wt % or more and 5.0 wt % or less.

5. The toner according to claim 1 , wherein the cylindrical bodies are subjected to a surface treatment by quaternary amine.

6. The toner according to claim 1 , wherein the silicate has a smectite structure or a sericite structure.

7. The toner according to claim 1 , wherein polyester resin is included as the resin material.

8. The toner according to claim 1 , wherein an average degree of circularity of the toner particles is 0.910 or more and 0.965 or less.

9. An image forming apparatus using the toner according to claim 1 .

10. An image forming apparatus comprising a plurality of development devices that form a single color image corresponding to a plurality of toner using different colors of toner, wherein at least one development device has the toner according to claim 1 .

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Mar 8, 2011
From: OKI, MASAHIRO
To: SEIKO EPSON CORPORATION
Reel/Frame 025919/0216 →
Priority Claims (1)
JP 2010-052400 · Mar 9, 2010 · national
Continuity (1)
Related Publication 20110223526A1 · Sep 15, 2011