Developing device, process cartridge, and image forming apparatus
US-9341985-B2 · May 17, 2016 · US
Electrostatic image developer and image forming apparatus
US8942587B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8942587-B2 |
| Application number | US-201313912656-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 7, 2013 |
| Priority date | Dec 21, 2012 |
| Publication date | Jan 27, 2015 |
| Grant date | Jan 27, 2015 |
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Abstract
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An electrostatic image developer includes a toner containing an external additive having a volume-average particle size of about 80 to 400 nm and an average circularity of about 0.7 to 0.85. The developer is used in an image forming apparatus including an image-carrying member having a top surface layer containing fluorocarbon resin particles, and a developer-carrying member that faces the image-carrying member and carries an electrostatic image developer, in which a value obtained by dividing the amount of developer on the developer-carrying member [g/m 2 ] by a shortest distance between the image-carrying member and the developer-carrying member [μm] is about 0.8 to 1.8, and a peripheral velocity ratio of the developer-carrying member to the image-carrying member is about 1.5 to 5.0 or the developer-carrying member moves in a direction opposite to the image-carrying member in a facing portion.
First claim
Opening claim text (preview).
What is claimed is: 1. An electrostatic image developer comprising: a toner that contains an external additive having a volume-average particle size of about 80 nm or more and about 400 nm or less and an average circularity of about 0.7 or more and about 0.85 or less, wherein the electrostatic image developer is used in an image forming apparatus including an image-carrying member that has a top surface layer containing fluorocarbon resin particles dispersed therein and that c…
Assignees
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Classifications
- G03G15/0813Primary
Physics · mapped topic
- G03G9/0833Primary
Physics · mapped topic
- G03G15/08Primary
Physics · mapped topic
Physics · mapped topic
Physics · mapped topic
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- What does patent US8942587B2 cover?
- An electrostatic image developer includes a toner containing an external additive having a volume-average particle size of about 80 to 400 nm and an average circularity of about 0.7 to 0.85. The developer is used in an image forming apparatus including an image-carrying member having a top surface layer containing fluorocarbon resin particles, and a developer-carrying member that faces the imag…
- Who is the assignee on this patent?
- Fuji Xerox Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification G03G15/0813. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Jan 27 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).