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US 9,316,947 B2Granted
Developing device, process cartridge, and image forming apparatus
AssigneeCanon Kabushiki Kaisha
InventorsHiroyuki Munetsugu, Tatsuya Suzuki, Kouki Yano, Takuya Kitamura
Life of this patent
Estimating the term…
Abstract
An elastically deformable region of an elastic layer in a developer supplying roller is near an agitator. In a state where the agitator agitates a predetermined region or where the agitator is in contact with the developer supplying roller, the agitator is rotated in the same direction as the developer supplying roller.
Claims22
A developing device comprising:
- a developer carrying member configured to carry developer;
- a developer supplying roller rotatably supported, being in contact with the developer carrying member, and including a continuous foam elastic layer configured to supply the developer to the developer carrying member;
- and
- an agitator rotatable in the same direction as the developer supplying roller and configured to agitate and pass through at least part of a predetermined region above the developer supplying roller in a gravity direction,
- wherein a length of the predetermined region in the gravity direction is a length from an upper portion of the developer supplying roller to a location corresponding to a radius of the developer supplying roller, and
- wherein a region W where the elastic layer is elastically deformed from its natural state by coming into contact with the developer carrying member is near a side of the agitator with respect to a line connecting a center of the developer supplying roller and a center of the developer carrying member, and
- wherein the agitator conveys the developer to a region U where the elastic layer is elastically deformed into its natural state and the developer supplying roller sucks the developer.
4 more elements
A developing device comprising:
- a developer carrying member configured to carry developer;
- a developer supplying roller rotatably supported, being in contact with the developer carrying member, and including a continuous foam elastic layer configured to supply the developer to the developer carrying member;
- and
- an agitator including a flexible member for agitating the developer, rotatable in the same direction as the developer supplying roller, and disposed above the developer supplying roller in a gravity direction,
- wherein a region where the elastic layer is elastically deformed from its natural state by coming into contact with the developer carrying member is near a side of the agitator with respect to a line connecting a center of the developer supplying roller and a center of the developer carrying member,
- wherein the flexible member is arranged so as to be caused to come into contact with the developer supplying roller by rotation of the agitator, and
- wherein the agitator conveys the developer to a region U where the elastic layer is elastically deformed into its natural state and the developer supplying roller sucks the developer.
4 more elements
A developing device comprising:
- a developer carrying member configured to carry developer;
- a developer supplying roller rotatably supported, being in contact with the developer carrying member, and including a continuous foam elastic layer configured to supply the developer to the developer carrying member;
- and
- an agitator rotatable in the same direction as the developer supplying roller and configured to agitate at least part of a predetermined region above the developer supplying roller in a gravity direction,
- wherein a length of the predetermined region in the gravity direction is a length from an upper portion of the developer supplying roller to a location corresponding to a radius of the developer supplying roller,
- wherein a region W where the elastic layer is elastically deformed from its natural state by coming into contact with the developer carrying member is near a side of the agitator with respect to a line connecting a center of the developer supplying roller and a center of the developer carrying member, and
- wherein a rotational center of the agitator is located below an opening of a developer containing chamber.
4 more elements
A developing device comprising:
- a developer carrying member configured to carry developer;
- a developer supplying roller rotatably supported, being in contact with the developer carrying member, and including a continuous foam elastic layer configured to supply the developer to the developer carrying member;
- and
- an agitator including a flexible member for agitating the developer, rotatable in the same direction as the developer supplying roller, and disposed above the developer supplying roller in a gravity direction,
- wherein a region where the elastic layer is elastically deformed from its natural state by coming into contact with the developer carrying member is near a side of the agitator with respect to a line connecting a center of the developer supplying roller and a center of the developer carrying member, and
- wherein the flexible member is arranged so as to be caused to come into contact with the developer supplying roller by rotation of the agitator, wherein a rotational center of the agitator is located below an opening of a developer containing chamber.
3 more elements
Dependencies are inferred from the claim text.