Electrical contact device for developing roller
AssigneeCanon Kabushiki Kaisha
InventorsShinjiro Toba, Tadayuki Tsuda, Shinichi Sasaki
Life of this patent
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Abstract
A developing apparatus includes a cylindrical rotatable developer carrying member for carrying a developer to a developing position. A non-rotary insulating magnet roller, provided in the cylindrical developer carrying member. A electroconductive member provided on the magnet roller, the electroconductive member partly constituting a voltage supplying path for supplying a voltage to the developer carrying member. A sliding contact, provided on inside of the developing sleeve, for establishing electric connection between the electroconductive member, and an inside surface of the developer carrying member in the voltage supplying path.
Claims15
A developing apparatus comprising:
- a cylindrical rotatable developer carrying member for carrying a developer to a developing position;
- a non-rotary insulating magnet roller, provided in said cylindrical developer carrying member;
- an electroconductive member provided on said magnet roller, said electroconductive member partly constituting a voltage supplying path for supplying a voltage to said developer carrying member;
- a sliding contact, provided inside said developer carrying member so as to be covered by said developer carrying member, for establishing electric connection between said electroconductive member and an inside surface of said developer carrying member in the voltage supplying path.
A developing apparatus comprising:
- a cylindrical rotatable developer carrying member for carrying a developer to a developing position;
- a non-rotary insulating magnet roller, provided in said cylindrical developer carrying member;
- an electroconductive member provided on said magnet roller, said electroconductive member partly constituting a voltage supplying path for supplying a voltage to said developer carrying member;
- a sliding contact, provided on inside of said developer carrying member, for establishing electric connection between said electroconductive member and an inside surface of said developer carrying member in the voltage supplying path,
- wherein said developer carrying member includes a first cylindrical portion and a second cylindrical portion having a smaller diameter than said first cylindrical portion and provided at a longitudinal end of said developer carrying member, and wherein said sliding contact is provided in said first cylindrical portion, and
- wherein said electroconductive member is extended from an inside of said first cylindrical portion to an inside of said second cylindrical portion.
Dependencies are inferred from the claim text.