Space securing member, developing device, charging device and process cartridge
AssigneeCanon Kabushiki Kaisha
InventorsTadashi Horikawa, Atsushi Numagami, Kazunari Murayama, Takahito Ueno
Life of this patent
Estimating the term…
Abstract
A space securing member defines a predetermined space between the first rotary member and the second rotary member which is arranged apart from the first rotary member with the predetermined space. The space securing member is provided with a circular hole that is rotatably supported by one of the first and second rotary members, and an arc-shaped portion that is in area contact with an outer peripheral surface of the other rotary member. The space securing member is used to provide a predetermined space between a charging roller and a photosensitive drum and/or a developing roller and the photosensitive drum.
Claims13
A space securing member that defines a predetermined space between a first rotary member and a second rotary member which is arranged apart from said first rotary member with said predetermined space, wherein said space securing member is provided with a circular hole which is rotatably supported by one of said first and second rotary members, and an arc-shaped portion which is in area contact with a peripheral surface of the other of said first and second rotary members.
A developing device for developing an electrostatic latent image formed on an electrophotographic photosensitive drum with toner, said developing device comprising:
- a developing roller;
- and
- a space securing member that defines a space between said developing roller and said electrophotographic photosensitive drum, said space securing member being rotatably supported by said developing roller and provided with an arc-shaped portion which is in area contact with an outer peripheral surface of said electrophotographic photosensitive drum.
A charging device for charging an electrophotographic photosensitive drum, said charging device comprising:
- a charging roller;
- and
- a space securing member that defines a space between said charging roller and said electrophotographic photosensitive drum, said space securing member being rotatably supported by said charging roller and provided with an arc-shaped portion which is in area contact with an outer peripheral surface of said electrophotographic photosensitive drum.
A process cartridge detachably mountable on a main body of an image forming apparatus, said process cartridge comprising:
- an electrophotographic photosensitive drum;
- a developing roller for developing an electrostatic latent image formed on said electrophotographic photosensitive drum with toner;
- and
- a space securing member that defines a space between said developing roller and said electrophotographic photosensitive drum, said space securing member being rotatably supported by said developing roller and provided with an arc-shaped portion which is in area contact with an outer peripheral surface of said electrophotographic photosensitive drum.
A process cartridge detachably mountable on a main body of an image forming apparatus, said process cartridge comprising:
- an electrophotographic photosensitive drum;
- a charging roller for charging said electrophotographic photosensitive drum;
- and
- a space securing member that defines a space between said charging roller and said electrophotographic photosensitive drum, said space securing member being rotatably supported by said charging roller and provided with an arc-shaped portion which is in area contact with an outer peripheral surface of said electrophotographic photosensitive drum.
A process cartridge detachably mountable on a main body of an image forming apparatus, said process cartridge comprising:
- an electrophotographic photosensitive drum;
- a developing roller for developing an electrostatic latent image formed on said electrophotographic photosensitive drum with toner;
- a space securing member that defines a space between said developing roller and said electrophotographic photosensitive drum, said space securing member being rotatably supported by said developing roller and provided with an arc-shaped portion which is in area contact with an outer peripheral surface of said electrophotographic photosensitive drum;
- a charging roller for charging said electrophotographic photosensitive drum;
- and
- a space securing member that defines a space between said charging roller and said electrophotographic photosensitive drum, said space securing member being rotatably supported by said charging roller and provided with an arc-shaped portion which is in area contact with an outer peripheral surface of said electrophotographic photosensitive drum.
Dependencies are inferred from the claim text.