Image forming apparatus
AssigneeCanon Kabushiki Kaisha
InventorsYuichiro Hirata, Shunsuke Matsushita, Takuya Oka
Life of this patent
Estimating the term…
Abstract
An image forming apparatus includes a photosensitive drum, a developing unit including an accommodating portion and a developing roller, a notifying portion, and a controller. In a case where a cumulative movement distance obtained by integrating a movement distance of the developing roller in a predetermined section of a surface of the developing roller from initial use of the developing unit is a predetermined first supply discrimination threshold or more, the controller controls the notifying portion so as to provide notification prompting a user to supply a developer.
Claims20
An image forming apparatus comprising:
- a photosensitive drum on which an electrostatic latent image is formed on a surface thereof;
- a developing unit which includes an accommodating portion for accommodating a developer and a developing roller for supplying the developer from the accommodating portion to the photosensitive drum and to which a supply container for supplying the developer to the accommodating portion is detachably mountable;
- a notifying portion configured to provide notification to a user;
- and
- a controller configured to control the notifying portion,
- wherein in a case where a cumulative movement distance obtained by integrating a movement distance of the developing roller in a predetermined section of a surface of the developing roller from initial use of the developing unit is a predetermined first supply discrimination threshold or more, the controller controls the notifying portion so as to provide notification prompting the user to supply the developer.
An image forming apparatus comprising:
- a photosensitive drum on which an electrostatic latent image is formed on a surface thereof;
- a developing unit which includes an accommodating portion for accommodating a developer and a developing roller for supplying the developer from the accommodating portion to the photosensitive drum and to which a supply container for supplying the developer to the accommodating portion is detachably mountable;
- a notifying portion configured to provide notification to a user;
- and
- a controller configured to control the notifying portion,
- wherein in a case where a cumulative movement distance obtained by integrating a movement distance of the developing roller in a predetermined section of a surface of the developing roller from initial use of the developing unit is a predetermined lifetime discrimination threshold or more, the controller controls the notifying portion so as to provide notification to the effect that the developing unit reaches an end of a lifetime thereof.
Dependencies are inferred from the claim text.