Developing apparatus
AssigneeMinolta Camera Kabushiki Kaisha
InventorsHiroshi Mizuno, Toshiya Natsuhara, Satoshi Deishi, Toshimitsu Fujiwara
Life of this patent
Estimating the term…
Abstract
A developing apparatus is arranged to supply toner onto the surface of a developing sleeve to form on it, a thin layer of toner triboelectrically charged by a restricting member, and to feed the toner layer onto an electrostatic latent image holding member having an electrostatic latent image formed on it for developing the latent image. At least part or all of the surface layer of the developing sleeve is formed by a mixed material mainly composed of crystalline polyamide resin and non-crystalline polyamide resin.
Claims8
A developing apparatus for use in electrophotography, which comprises a toner holding member having a surface and holding toner on the surface and adapted to be driven for rotation, the surface of said toner holding member containing a mixture mainly composed of crystalline polyamide and non-crystalline polyamide, means for supplying toner onto the surface of said toner holding member, and a restricting member for restricting a layer of toner on said surface by depressing the toner thus supplied onto the surface of said toner holding member.
A developing apparatus for developing an electrostatic latent image on an image holding member, comprising:
- a toner holding member having a surface and being mounted in contact with a surface of said image holding member,
- said toner holding member having toner on its surface and being driven for rotation,
- the surface of said toner holding member containing a mixture mainly composed of crystalline polyamide and non-crystalline polyamide, said non-crystalline polyamide being contained in an amount at 40 to 65% by weight with respect to said toner holding member,
- means for supplying toner onto the surface of said toner holding member, and
- a restricting member for restricting a layer of toner by depressing the supplied toner onto the surface of said toner holding member.
A developing apparatus for developing an electrostatic latent image on an image holding member, which comprises:
- a toner holding member having a surface and being provided in contact with a surface of said image holding member at a predetermined region,
- said toner holding member having toner on its surface and is driven for rotation, the surface of said toner holding member containing a mixture mainly composed of crystalline polyamide and non-crystalline polyamide, said non-crystalline polyamide being contained in amount at 50 to 75% by weight with respect to said toner holding member,
- means for supplying toner onto the surface of said toner holding member, and
- a restricting member for restricting a layer of toner by depressing the supplied toner onto the surface of said toner holding member.
Dependencies are inferred from the claim text.