Image forming apparatus
AssigneeCanon Kabushiki Kaisha
InventorsShuhei Kawasaki, Kodai Hayashi, Yoshihiro Mitsui, Shunsuke Matsushita
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Abstract
An image forming apparatus has a photosensitive drum configured to bear a developer image, a developing apparatus having a developing roller that bears developer and a developing blade that regulates the amount of the developer on the developing roller, and a detection portion that detects information on the amount of the developer stored in the developing apparatus. The image forming apparatus performs a discharging operation for discharging a coating agent, applied to a developing roller in an unused state, from the developing apparatus to the photosensitive drum, while varying an operational condition for the discharging operation varied based on the information.
Claims13
An image forming apparatus comprising:
- an image bearing member configured to bear a developer image;
- a developing apparatus having a developer bearing member that bears developer and a regulating member that regulates an amount of the developer on the developer bearing member;
- a detection portion that detects the amount of the developer stored in the developing apparatus;
- and
- a control portion that performs a discharging operation for discharging the developer from the developing apparatus, apart from an image forming operation,
- wherein the developer bearing member bears a coating agent during an unused state, and
- in the discharging operation, a first amount of the developer discharged, when a first amount of the developer stored is detected, is larger than a second amount of the developer discharged when a second amount of the developer stored, that is larger than the first amount of the developer stored, is detected.
An image forming apparatus comprising:
- an image bearing member configured to bear a developer image;
- a developing apparatus including a developer bearing member that bears developer and a regulating member that regulates an amount of the developer borne by the developer bearing member and that charges the developer;
- and
- a detection portion that detects the amount of the developer stored in the developing apparatus,
- the image forming apparatus executing a discharging operation that is different from an image forming operation of forming the developer image on a recording material and that moves the developer from the developer bearing member to the image bearing member,
- wherein a coating agent that is powder other than the developer is applied to the developer bearing member during an unused state, and
- the image forming apparatus comprises a control portion that varies an execution frequency of the discharging operation so as to increase the execution frequency of the discharging operation with respect to an execution frequency of the image forming operation as the amount of the developer detected by the detection portion decreases.
Dependencies are inferred from the claim text.