Developer for developing electrostatic image, image forming apparatus and image forming method
OwnerSatoshi Mochizuki, Hideki Sugiura +3inventors
InventorsSatoshi Mochizuki, Hideki Sugiura, Shinya Nakayama, Kazuhiko Umemura, Yasuo Asahina
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Abstract
A developer, which includes a base toner containing at least a binding resin and a coloring agent; and inorganic fine particles; wherein the base toner satisfies 105≦SF-1≦130 and 120≦SF-2≦180, wherein SF-1=((absolute maximum length of a particle of the base toner)2/area of the particle of the base toner)×(π/4)×100, wherein SF-2=(peripheral length of the particle of the base toner)2/(area of the base toner)×(¼π)×100, wherein the inorganic fine particles have an average particle diameter that ranges between 30 nm to 160 nm.
Claims21
A developer, comprising:
- a base toner containing at least a binding resin and a coloring agent;
- and
- inorganic fine particles;
- wherein the base toner satisfies 105≦SF-1≦130 and 120≦SF-2≦180,
- wherein SF-1=((absolute maximum length of a particle of the base toner)2/area of the particle of the base toner)×(π/4)×100,
- wherein SF-2=(peripheral length of the particle of the base toner)2/(area of the base toner)×(¼π)×100,
- wherein the inorganic fine particles have an average particle diameter that ranges between 30 nm to 160 nm.
An image forming apparatus, comprising:
- a developer for developing an electrostatic latent image formed on an electrostatic latent image carrier body to form a toner image;
- a transfer unit for transferring the toner image to a transfer medium;
- wherein the developer includes a further developer and a carrier,
- wherein the further developer has a base toner containing at least a binding resin and a coloring agent, and inorganic fine particles,
- wherein the carrier has a magnetic particle,
- wherein the base toner satisfies 105≦SF-1≦130 and 120≦SF-2≦180,
- wherein SF-1=((absolute maximum length of a particle of the base toner)2/area of the particle of the base toner)×(π/4)×100,
- wherein SF-2=(peripheral length of the particle of the base toner)2/(area of the base toner)×(¼π)×100,
- wherein the inorganic fine particles have an average particle diameter that ranges between 30 nm to 160 nm.
A process cartridge, comprising:
- a charge unit charging a photoconductor;
- an exposure unit exposing light to the photoconductor to form an image on the photoconductor;
- a development unit developing the image formed on the photoconductor with a developer;
- a transfer unit transferring the image formed on the photoconductor to a transfer medium;
- a cleaning unit cleaning the transfer unit;
- wherein the developer includes a further developer and a carrier,
- wherein the further developer has a base toner containing at least a binding resin and a coloring agent, and inorganic fine particles,
- wherein the carrier has a magnetic particle,
- wherein the base toner satisfies of 105≦SF-1≦130 and 120≦SF-2≦180,
- wherein SF-1=((absolute maximum length of a particle of the base toner)2/area of the particle of the base toner)×( π/4)×100,
- wherein SF-2=(peripheral length of the particle of the base toner)2/(area of the base toner)×(¼π)×100,
- wherein the inorganic fine particle has an average particle diameter that ranges between 30 nm to 160 nm.
A image forming method, comprising the steps of:
- charging a photoconductor;
- exposing light to the photoconductor to form an image on the photoconductor;
- developing the image formed on the photoconductor with a developer;
- transferring the image formed on the photoconductor to a transfer medium;
- wherein the developer includes a further developer and a carrier,
- wherein the further developer has a base toner containing at least a binding resin and a coloring agent, and inorganic fine particles,
- wherein the carrier has a magnetic particle,
- wherein the base toner satisfies 105≦SF-1≦130 and 120≦SF-2≦180,
- wherein SF-1=((absolute maximum length of a particle of the base toner)2/area of the particle of the base toner)2×(π/4)×100),
- wherein SF-2=(peripheral length of the particle of the base toner/area of the base toner)×(¼π)×100,
- wherein the inorganic fine particles have an average particle diameter that ranges between 30 nm to 160 nm.
Dependencies are inferred from the claim text.