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US 8,577,256 B2Granted
Electrostatic image developing carrier, electrostatic image developer, process cartridge, image forming method, and image forming apparatus
AssigneeFuji Xerox Co., Ltd.
InventorsYosuke Tsurumi, Rieko Kataoka
Life of this patent
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Abstract
An electrostatic image developing carrier includes a ferrite particle that contains magnesium element in an amount of about 3.0 wt % or more and about 10.0 wt % or less and manganese element in an amount of about 0.2 wt % or more and less than about. 1.0 wt %; and a resin layer that covers the ferrite particle.
Claims3
A process cartridge attachable to and detachable from an image-forming apparatus, comprising:
- an electrostatic image developer;
- and
- at least one selected from the group consisting of an image holding member, a charging unit that charges a surface of an image holding member, a developing unit that develops a latent image formed on a surface of an image holding member with the electrostatic image developer to form a toner image, and a cleaning unit that removes a toner remaining on the surface of the image holding member,
- wherein the electrostatic image developer comprises
- an electrostatic image developing carrier comprising a ferrite particle that contains metal elements, the metal elements consisting of iron, magnesium, and manganese, the ferrite particle containing the magnesium element in an amount of from 3.0 wt % to 10.0 wt % and the manganese element in an amount of from 0.2 wt % to 1.0 wt %,
- a resin layer that covers the ferrite particle, and
- a toner.
4 more elements
An image-forming method comprising:
- charging an image holding member;
- exposing the charged image holding member to form an electrostatic latent image on a surface of the image holding member;
- developing the electrostatic latent image formed on the surface of the image holding member with an electrostatic image developer to form a toner image;
- transferring the toner image formed on the surface of the image holding member to a surface of a transfer-receiving member;
- and
- fixing the toner image,
- wherein the electrostatic image developer comprises
- an electrostatic image developing carrier comprising a ferrite particle that contains metal elements, the metal elements consisting of iron, magnesium, and manganese, the ferrite particle containing the magnesium element in an amount of from 3.0 wt % to 10.0 wt % and the manganese element in an amount of from 0.2 wt % to 1.0 wt %,
- a resin layer that covers the ferrite particle, and
- a toner.
7 more elements
An image-forming apparatus comprising:
- an electrostatic image developer;
- an image holding member;
- a charging unit that charges the image holding member;
- an exposure unit that exposes the charged image holding member to form an electrostatic latent image on the image holding member;
- a developing unit that develops the electrostatic latent image with the electrostatic image developer to form a toner image;
- a transfer unit that transfers the toner image from the image holding member to a transfer-receiving member;
- and
- a fixing unit that fixes the toner image,
- wherein the electrostatic image developer comprises
- an electrostatic image developing carrier comprising a ferrite particle that contains metal elements, the metal elements consisting of iron, magnesium, and manganese, the ferrite particle containing the magnesium element in an amount of from 3.0 wt % to 10.0 wt % and the manganese element in an amount of from 0.2 wt % to 1.0 wt %,
- a resin layer that covers the ferrite particle, and
- a toner.
9 more elements
Dependencies are inferred from the claim text.