Development apparatus
AssigneeCanon Kabushiki Kaisha
InventorsKazuo Isaka, Kimio Nakahata, Masaaki Sakurai, Tsuyoshi Watanabe, Fumitaka Kan, Kenji Takeda
Life of this patent
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Abstract
A development apparatus has a developer supporting member having a magnet therein and a thickness controlling member for the developer, the developer being a magnetic one-component developer which is applied to the surface of the developer supporting member by means of the thickness controlling member, the applied surface of the developer supporting member being brought into a position opposed to a latent-image carrying member to develop the latent image thereon, the surface of the developer supporting member being roughened by sand blast treatment with irregularly shaped and/or sized particles.
Claims38
An apparatus for developing latent images on latent-image carrying means by the application of developer, comprising:
- developer supporting means for carrying developer on its surface;
- magnetic-field producing means enclosed by said developer supporting means;
- means for supplying one-component magnetic developer to said developer supporting means;
- and
- means, disposed adjacent to said developer supporting means, for controlling the amount of said developer on the surface of said developer supporting means;
- the surface of said developer supporting means being roughened by sand blast treatment, wherein the pitch of said roughened surface is in the range of 2 to 50.mu. and the surface roughness of said roughened surface is in the range of 0.1 to 8.mu..
An apparatus for developing latent images on latent-image carrying means by the application of developer, comprising:
- developer supporting means for carrying developer on its surface;
- magnetic-field producing means enclosed by said developer supporting means;
- means for supplying one-component magnetic developer to said developer supporting means;
- and
- means, disposed adjacent to said developer supporting means, for controlling the amount of said developer on the surface of said developer supporting means;
- the surface of said developer supporting means being roughened by sand blast treatment and then plated.
An apparatus for developing latent images on latent-image carrying means by the application of developer, comprising:
- developer supporting means for carrying developer on its surface;
- magnetic-field producing means enclosed by said developer supporting means;
- means for supplying one-component magnetic developer to said developer supporting means;
- and
- means, disposed adjacent to said developer supporting means, for controlling the amount of said developer on the surface of said developer supporting means;
- the surface of said developer supporting means being roughened by sand blast treatment and thereafter subjected to anodized aluminum treatment.
An apparatus for developing latent images on latent-image carrying means by the application of developer, comprising:
- developer supporting means for carrying developer on its surface;
- magnetic-field producing means enclosed by said developer supporting means;
- means for supplying one-component magnetic developer to said developer supporting means;
- and
- means, disposed adjacent to said developer supporting means, for controlling the amount of said developer on the surface of said developer supporting means;
- the surface of said developer supporting means being subjected to anodized aluminum treatment and thereafter roughened by sand blast treatment with irregularly shaped particles.
An apparatus for developing latent images on latent-image carrying means by the application of developer, comprising:
- developer supporting means for carrying developer on its surface;
- magnetic-field producing means enclosed by said developer supporting means;
- means for supplying one-component magnetic developer to said developer supporting means;
- and
- means, disposed adjacent to said developer supporting means, for controlling the amount of said developer on the surface of said developer supporting means;
- the surface of said developer supporting means being subjected to anodized aluminum treatment and thereafter roughened by sand blast treatment with regularly shaped particles.
An apparatus for developing latent images on latent-image carrying means by the application of developer, comprising:
- a movable sleeve of non-magnetic material for carrying one-component magnetic toner on its surface;
- a magnet roller fixedly disposed within said sleeve;
- means for supplying said one-component magnetic toner to said surface of said sleeve;
- a magnetic doctor blade for controlling the thickness of the magnetic toner layer formed on said sleeve, said doctor blade being disposed opposed to the magnetic pole of said magnet roller to form a magnetic field between said magnetic blade and said magnet roller by which said magnetic toner layer will be controlled into a uniform thickness less than the gap between said sleeve and said latent-image carrying means;
- and
- means for applying an electric alternating field to the gap between said sleeve and said latent-image carrying means;
- the surface of said sleeve being subjected to anodized aluminum treatment and thereafter roughened by sand blast treatment with irregularly shaped particles.
Dependencies are inferred from the claim text.