A cartridge detachably mountable to a main assembly of an image forming apparatus includes a photosensitive member unit including a photosensitive drum; a sheet configured to remove a deposited matter from a surface of the drum, the sheet being in contact with the surface of the drum at an end portion of the drum with respect to a rotational axis direction of the member; and a developing unit detachably mounted to the member unit, the developing unit including a developing roller configured to supply toner to the drum, and a storage portion configured to store the deposited matter removed from the surface of the drum by the sheet.

A cartridge detachably mountable to a main assembly of an image forming apparatus includes a photosensitive member unit including a photosensitive drum; a sheet configured to remove a deposited matter from a surface of the drum, the sheet being in contact with the surface of the drum at an end portion of the drum with respect to a rotational axis direction of the member; and a developing unit detachably mounted to the member unit, the developing unit including a developing roller configured to supply toner to the drum, and a storage portion configured to store the deposited matter removed from the surface of the drum by the sheet.

An image forming apparatus includes a rotatable image bearing member to bear an electrostatic latent image, a developing container to accommodate developer including toner and to allow new developer to be replenished by a developer replenishing container, and a developer bearing member to develop the electrostatic latent image into a toner image by using the developer in the developing container. A transfer roller transfers the toner image born on the image bearing member onto the recording material, and a controller notifies replenishment information for prompting replenishing the developing container with the new developer by the developer replenishing container. The controller notifies the replenishment information in a state in which an index correlated with a ratio of an amount of paper dust mixed in the developer in the developing container to an amount of the developer in the developing container has not exceeded a preset threshold value of the index.

A cartridge detachably mountable to a main assembly of an image forming apparatus includes a photosensitive member unit including a photosensitive drum; a sheet configured to remove a deposited matter from a surface of the drum, the sheet being in contact with the surface of the drum at an end portion of the drum with respect to a rotational axis direction of the member; and a developing unit detachably mounted to the member unit, the developing unit including a developing roller configured to supply toner to the drum, and a storage portion configured to store the deposited matter removed from the surface of the drum by the sheet.

A cartridge detachably mountable to a main assembly of an image forming apparatus includes a photosensitive member unit including a photosensitive drum; a sheet configured to remove a deposited matter from a surface of the drum, the sheet being in contact with the surface of the drum at an end portion of the drum with respect to a rotational axis direction of the member; and a developing unit detachably mounted to the member unit, the developing unit including a developing roller configured to supply toner to the drum, and a storage portion configured to store the deposited matter removed from the surface of the drum by the sheet.

An image forming apparatus includes a rotatable image bearing member configured to bear an electrostatic latent image, a developing container configured to accommodate developer comprising toner, a developing member configured to develop the electrostatic latent image born on the image bearing member into a toner image by using the developer in the developing container, a transfer member configured to transfer the toner image born on the image bearing member onto the recording material, and a notification portion configured to notify replenishment information for prompting replenishing the developing container with the developer. The notification portion is configured to notify the replenishment information in a state in which an index correlated with a ratio of an amount of paper dust mixed in the developer in the developing container to an amount of the developer in the developing container has not exceeded a preset threshold value of the index.

A cartridge detachably mountable to a main assembly of an image forming apparatus includes a photosensitive member unit including a photosensitive drum; a sheet configured to remove a deposited matter from a surface of the drum, the sheet being in contact with the surface of the drum at an end portion of the drum with respect to a rotational axis direction of the member; and a developing unit detachably mounted to the member unit, the developing unit including a developing roller configured to supply toner to the drum, and a storage portion configured to store the deposited matter removed from the surface of the drum by the sheet.

A cartridge detachably mountable to a main assembly of an image forming apparatus includes a photosensitive member unit including a photosensitive drum; a sheet configured to remove a deposited matter from a surface of the drum, the sheet being in contact with the surface of the drum at an end portion of the drum with respect to a rotational axis direction of the member; and a developing unit detachably mounted to the member unit, the developing unit including a developing roller configured to supply toner to the drum, and a storage portion configured to store the deposited matter removed from the surface of the drum by the sheet.

A process cartridge for an image forming apparatus includes an image bearer; a developer bearer to supply a latent image on the image bearer with toner and develop the latent image, a cleaner to clean residual toner on the image bearer after a transfer process, and an elastically deformable remover to contact an end portion of the image bearer in an axial direction of the image bearer. The remover includes an inclined part extending in the axial direction of the image bearer from an upstream side to a downstream side in a direction of movement of the image bearer. The inclined part includes a contact portion to contact the image bearer. The contact portion of the inclined part forms a gradient in the axial direction.

A cartridge detachably mountable to a main assembly of an image forming apparatus includes a photosensitive member unit including a photosensitive drum; a sheet configured to remove a deposited matter from a surface of the drum, the sheet being in contact with the surface of the drum at an end portion of the drum with respect to a rotational axis direction of the member; and a developing unit detachably mounted to the member unit, the developing unit including a developing roller configured to supply toner to the drum, and a storage portion configured to store the deposited matter removed from the surface of the drum by the sheet.