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US 2017/0357184 A1Published application
Developing device, process cartridge and electrophotographic image forming apparatus
AssigneeCanon Kabushiki Kaisha
InventorSho Shirakata
Life of this patent
Estimating the term…
Abstract
A developing device includes: a developer carrying member; a developer container including a developer accommodating portion, a developing opening and a developing chamber; and a developer supplying member including a shaft member and a feeding member. The feeding member includes a first feeding portion having a length L1 and a radius R1, and includes a second feeding portion having a length L2 and a radius R2. When a length of the developing opening is L3, a shortest length from the developing opening to the rotation center of the shaft member is L4, and a length from the developer carrying member to the rotation center of the shaft member is L5, the following relationships are satisfied: L1<L3<L2, and L4<R1<L5.
Claims31
A developing device comprising:
- a developer carrying member for developing an electrostatic image with a developer;
- a developer container including a developer accommodating portion for accommodating the developer, a developing opening and a developing chamber;
- and
- a developer supplying member for supplying the developer to the developing chamber through the developing opening, wherein said developer supplying member includes a shaft member rotatably supported by the developer accommodating portion and a feeding member,
- wherein the feeding member includes a first feeding portion which has a length L1 measured in an axial direction of said developer carrying member and a radius R1 measured from a rotation center of the shaft member, and includes a second feeding portion which has a length L2 measured in the axial direction of said developer carrying member and a radius R2 measured from the rotation center of the shaft member, and
- wherein when a length of the developing opening with respect to the axial direction of said developer carrying member is L3, a shortest length from the developing opening to the rotation center of the shaft member is L4, and a length from said developer carrying member to the rotation center of the shaft member is L5, the following relationships are satisfied:
- L1<L3<L2, and
- L4<R1<L5.
5 more elements
A developing device comprising:
- a developer carrying member for developing an electrostatic image with a developer;
- a developer container including a developer accommodating portion for accommodating the developer, a developing opening and a developing chamber;
- and
- a developer supplying member for supplying the developer to the developing chamber through the developing opening, wherein said developer supplying member includes a shaft member rotatably supported by the developer accommodating portion and a feeding member,
- wherein the feeding member includes a first feeding portion and a second feeding portion, and
- wherein an end portion of the first feeding portion passes through the developing opening and feeds the developer in the developing chamber, and an end portion of the second feeding portion feeds the developer in the developer accommodating portion.
3 more elements
A process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, comprising:
- an image bearing member;
- a developer carrying member for developing an electrostatic image, formed on said image bearing member, with a developer;
- a developer container including a developer accommodating portion for accommodating the developer, a developing opening and a developing chamber;
- and
- a developer supplying member for supplying the developer to the developing chamber through the developing opening, wherein said developer supplying member includes a shaft member rotatably supported by the developer accommodating portion and a feeding member,
- wherein the feeding member includes a first feeding portion which has a length L1 measured in an axial direction of said developer carrying member and a radius R1 measured from a rotation center of the shaft member, and includes a second feeding portion which has a length L2 measured in the axial direction of said developer carrying member and a radius R2 measured from the rotation center of the shaft member, and
- wherein when a length of the developing opening with respect to the axial direction of said developer carrying member is L3, a shortest length from the developing opening to the rotation center of the shaft member is L4, and a length from said developer carrying member to the rotation center of the shaft member is L5, the following relationships are satisfied:
- L1<L3<L2, and
- L4<R1<L5.
6 more elements
A process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, comprising:
- an image bearing member;
- a developer carrying member for developing an electrostatic image, formed on said image bearing member, with a developer;
- a developer container including a developer accommodating portion for accommodating the developer, a developing opening and a developing chamber;
- and
- a developer supplying member for supplying the developer to the developing chamber through the developing opening, wherein said developer supplying member includes a shaft member rotatably supported by the developer accommodating portion and a feeding member,
- wherein the feeding member includes a first feeding portion and a second feeding portion, and
- wherein an end portion of the first feeding portion passes through the developing opening and feeds the developer in the developing chamber, and an end portion of the second feeding portion feeds the developer in the developer accommodating portion.
4 more elements
An electrophotographic image forming apparatus for forming an image on a recording material by using an electrophotographic image forming process, comprising:
- an image bearing member;
- a developer carrying member for developing an electrostatic image, formed on said image bearing member, with a developer;
- a developer container including a developer accommodating portion for accommodating the developer, a developing opening and a developing chamber;
- and
- a developer supplying member for supplying the developer to the developing chamber through the developing opening, wherein said developer supplying member includes a shaft member rotatably supported by the developer accommodating portion and a feeding member,
- wherein the feeding member includes a first feeding portion which has a length L1 measured in an axial direction of said developer carrying member and a radius R1 measured from a rotation center of the shaft member, and includes a second feeding portion which has a length L2 measured in the axial direction of said developer carrying member and a radius R2 measured from the rotation center of the shaft member, and
- wherein when a length of the developing opening with respect to the axial direction of said developer carrying member is L3, a shortest length from the developing opening to the rotation center of the shaft member is L4, and a length from said developer carrying member to the rotation center of the shaft member is L5, the following relationships are satisfied:
- L1<L3<L2, and
- L4<R1<L5.
6 more elements
An electrophotographic image forming apparatus detachably mountable to a main assembly of an electrophotographic image forming apparatus, comprising:
- an image bearing member;
- a developer carrying member for developing an electrostatic image, formed on said image bearing member, with a developer;
- a developer container including a developer accommodating portion for accommodating the developer, a developing opening and a developing chamber;
- and
- a developer supplying member for supplying the developer to the developing chamber through the developing opening, wherein said developer supplying member includes a shaft member rotatably supported by the developer accommodating portion and a feeding member,
- wherein the feeding member includes a first feeding portion and a second feeding portion, and
- wherein an end portion of the first feeding portion passes through the developing opening and feeds the developer in the developing chamber, and an end portion of the second feeding portion feeds the developer in the developer accommodating portion.
4 more elements
Dependencies are inferred from the claim text.