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US 2025/0053127 A1Published application
Developing device and image forming apparatus
AssigneeCanon Kabushiki Kaisha
InventorsNAOKI MUGITA, NAOTO KUBO
Life of this patent
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Abstract
Disclosed is a developing device detachably attachable to an image forming apparatus. The developing device includes a storing portion that stores information on output characteristics of a power supply of an image forming apparatus that has performed an initializing mode for determining a control voltage to be applied to a magnetic permeability sensor by the power supply of the image forming apparatus in order to detect a toner density of developer accommodated in the developing device.
Claims13
A developing device detachably attachable to an image forming apparatus, comprising:
- a developer bearing member that bears developer including toner and carrier for developing an electronic latent image formed on an image bearing member;
- a developing container that accommodates the developer;
- a magnetic permeability sensor capable of outputting an output voltage according to a toner density of the developer accommodated in the developing container by a voltage being applied to the magnetic permeability sensor;
- and
- a storing portion that stores information on output characteristics of a power supply of an image forming apparatus that has performed an initializing mode for determining a control voltage to be applied to the magnetic permeability sensor by the power supply of the image forming apparatus in order to detect a toner density of the developer accommodated in the developing device.
2 more elements
An image forming apparatus comprising:
- an image bearing member;
- a developing device detachably attachable to the image forming apparatus, the developing device comprising:
- a developer bearing member that bears developer including toner and carrier for developing an electronic latent image formed on the image bearing member;
- a developing container that accommodates the developer;
- a magnetic permeability sensor capable of outputting an output voltage according to a toner density of the developer accommodated in the developing container by a voltage being applied to the magnetic permeability sensor;
- and a storing portion;
- a power supply that applies a voltage to the magnetic permeability sensor;
- a main body storing portion that stores information on output characteristics of the power supply;
- and
- a control portion capable of performing an initializing mode for determining a control voltage to be applied to the magnetic permeability sensor by the power supply in order to detect a toner density of the developer accommodated in the developing device by detecting an output voltage output from the magnetic permeability sensor to which the power supply applies the voltage,
- wherein in a case where the initializing mode has not been performed for the developing device attached to the image forming apparatus, the control portion performs the initializing mode, and the control portion reads out the information on output characteristics of the power supply stored in the main body storing portion and stores in the storing portion the information as information on output characteristics of a power supply of an image forming apparatus that has performed the initializing mode.
8 more elements
Dependencies are inferred from the claim text.