Developer and image formation apparatus having developer
AssigneeRicoh Company, Ltd.
InventorsTakeo Tsukamoto, Osamu Satoh
Life of this patent
Estimating the term…
Abstract
A developer includes a development roller which supplies a developing solution to a photosensitive body, transport screws which stir and transport the developing solution, and the like. A high heat conductivity member which serves as a partition is provided between the transport screws, and a radiator which is led to an outside of the developer and which includes a plurality of radiation fins is constituted in an upper portion of the developer. To increase a heat receiving area for receiving heat from the developing solution, a second high heat conductivity member which is formed out of a graphite sheet is bonded to an inner wall surface of a lower casing, and the second high heat conductivity member contacts with the high heat conductivity member.
Claims33
A developer comprising:
- a carrier which supplies a developing material to an image carrier, wherein the developing material is contained in a casing;
- a heat conductivity member having a first portion and a second portion, the first portion being located inside of the developer and making a physical contact with the developing material, and the second portion being located outside of the developer, wherein heat generated around the first portion of the heat conductivity member is conducted to the second portion of the heat conductivity member;
- and
- a radiator disposed on the second portion of the heat conductivity member, wherein the radiator radiates the heat conducted to the second portion of the heat conductivity member to the outside of the developer.
A developer comprising:
- a carrier which supplies a developing material which is contained in a casing, to an image carrier;
- a heat conductivity member which contacts with the developing material;
- and
- a radiator which is formed by leading the heat conductivity member to an outside of the developer, wherein
- the casing includes a lower casing which contains the developing material and an upper casing which covers an upper portion of the lower casing,
- a developing material restriction member which restricts a thickness of the developing material on the carrier is provided on the upper casing side, and
- the heat conductivity member is provided in the upper casing to be contactable to the developing material which is intercepted by the developing material restriction member.
A developer comprising:
- a carrier which supplies a developing material which is contained in a casing, to an image carrier;
- a heat conductivity member which contacts with the developing material;
- and
- a radiator which is formed by leading the heat conductivity member to an outside of the developer, wherein
- a portion of an inner wall surface of the casing includes a second heat conductivity member, the portion contacting with the developing material, and the second heat conductivity member contacts with the first heat conductivity member.
An image formation apparatus comprising a developer, the developer comprising:
- a carrier which supplies a developing material to an image carrier, wherein the developing material is contained in a casing;
- a heat conductivity member having a first portion and a second portion, the first portion being located inside of the developer and making a physical contact with the developing material, and the second portion being located outside of the developer, wherein heat generated around the first portion of the heat conductivity member is conducted to the second portion of the heat conductivity member;
- and
- a radiator disposed on the second portion of the heat conductivity member, wherein the radiator radiates the heat conducted to the second portion of the heat conductivity member to the outside of the developer, wherein
- an electrostatic latent image is formed on the image carrier by an optical writing unit and visualized as a toner image by the developer, and the toner image is transferred to a recording material.
An image formation apparatus comprising:
- a developer which includes a carrier which carries and transports a developing material, a developing material container which contains the developing material which is supplied by the carrier, and a developing material stirring and transporting member which stirs the developing material in the developing material container;
- a heat conductive member having a first portion and a second portion, the first portion being located inside of the developer and making a physical contact with the developing material, and the second portion being located outside of the developer, wherein heat generated around the first portion of the heat conductive member is conducted to the second portion of the heat conductive member;
- and
- a cooling unit which cools the heat conducted by the heat conductive member at the second portion.
Dependencies are inferred from the claim text.