Back to results
US 2026/0194840 A1Published application
Image forming apparatus
AssigneeCanon Kabushiki Kaisha
InventorTadashi Fukuda
Life of this patent
Estimating the term…
Abstract
An image forming apparatus includes a developing device provided with a developing container, a rotatable developing member and a supplying screw, a sucking portion for sucking the developer scattered inside the developing container, a vibration applying portion for applying vibration to the developing container. The rotatable developing member is rotationally driven by a first driving portion. The supplying screw is rotationally driven by a second driving portion. At start of a vibration applying operation by the vibration applying portion, a controller controls the first driving portion so as to become a state in which the rotatable developing member is rotationally driven, and controls the second driving portion so as to become a state in which rotational drive of the supplying screw is stopped.
Claims20
An image forming apparatus comprising:
- an image bearing member;
- a developing device provided with a developing container for accommodating a developer including toner and a carrier, a rotatable developing member for carrying and feeding the developer to develop an electrostatic latent image formed on the image bearing member and a supplying screw for supplying the developer to the rotatable developing member while feeding the developer;
- a sucking portion configured to suck the developer scattered inside the developing container;
- a vibration applying portion configured to apply vibration to the developing container;
- a first driving portion configured to rotationally drive the rotatable developing member;
- a second driving portion configured to rotationally drive the supplying screw;
- and
- a controller,
- wherein at start of a vibration applying operation by the vibration applying portion, the controller controls the first driving portion so as to become a state in which the rotatable developing member is rotationally driven, and controls the second driving portion so as to become a state in which rotational drive of the supplying screw is stopped.
6 more elements
An image forming apparatus comprising:
- an image bearing member;
- a developing device provided with a developing container for accommodating a developer including toner and a carrier, a rotatable developing member for carrying and feeding the developer to develop an electrostatic latent image formed on the image bearing member and a supplying screw for supplying the developer to the rotatable developing member while feeding the developer;
- a sucking portion configured to suck the developer scattered inside the developing container;
- a vibration applying portion configured to apply vibration to the developing container;
- a first driving portion configured to rotationally drive the rotatable developing member;
- a second driving portion configured to rotationally drive the supplying screw;
- and
- a controller,
- wherein during an image forming operation, the controller controls the first driving portion so as to become a state in which the rotatable developing member is rotationally driven at a first speed, and controls the second driving portion so as to become a state in which the supplying screw is rotationally driven at a second speed, and
- wherein at start of the vibration applying operation by the vibration applying portion, the controller controls the first driving portion so as to become the state in which the rotatable developing member is rotationally driven at the first speed, and controls the second driving portion so as to become a state in which the supplying screw is rotationally driven at a third speed slower than the second speed.
7 more elements
An image forming apparatus comprising:
- an image bearing member;
- a developing device provided with a developing container for accommodating a developer including toner and a carrier, a first rotatable developing member for carrying and feeding the developer to develop an electrostatic latent image formed on the image bearing member, a second rotatable developing member disposed opposite to the first rotatable developing member and to which the developer remaining after the electrostatic latent image being developed by the first rotatable developing member is delivered, the second rotatable developing member carrying and deeding the developer to develop the electrostatic latent image by the second rotatable developing member after the electrostatic latent image being developed by the first rotatable developing member, and a supplying screw for supplying the developer to the first rotatable developing member while feeding the developer;
- a sucking portion configured to suck the developer scattered inside the developing container;
- a vibration applying portion configured to apply vibration to the developing container;
- a first driving portion configured to rotationally drive the first rotatable developing member and the second rotatable developing member;
- a second driving portion configured to rotationally drive the supplying screw;
- and
- a controller,
- wherein at start of the vibration applying operation by the vibration applying portion, the controller controls the first driving portion so as to become a state in which the first rotatable developing member and the second rotatable developing member are rotationally driven, and controls the second driving portion so as to become a state in which rotational drive of the supplying screw is stopped.
6 more elements
Dependencies are inferred from the claim text.