A process cartridge is provided. The process cartridge includes a housing, a rotator rotatably mounted in the housing, and a support mounted on the housing. The rotator includes a rotation unit and a drive unit coupled to the rotation unit. The drive unit further comprises a drive transmission device and an actuating rod coupled to the drive transmission device. The support includes a notch allowing the actuating rod to pass through. When the actuating rod receives an applied force, the actuating rod swings in a plane defined by a longitudinal direction and a horizontal direction of the process cartridge.

A process cartridge is provided. The process cartridge includes a housing, a rotator rotatably mounted in the housing, and a support mounted on the housing. The rotator includes a rotation unit and a drive unit coupled to the rotation unit. The drive unit further comprises a drive transmission device and an actuating rod coupled to the drive transmission device. The support includes a notch allowing the actuating rod to pass through. When the actuating rod receives an applied force, the actuating rod swings in a plane defined by a longitudinal direction and a horizontal direction of the process cartridge.

An electrophotographic photoreceptor includes a conductive base body and a multilayered photosensitive layer disposed on the conductive base body and including a charge generation layer and a charge transport layer, wherein the charge transport layer is an uppermost surface layer and contains a charge transport material, a polyester resin, and a compound (T) represented by Formula (T) below, the polyester resin includes a polyester resin (1) including at least one selected from the group consisting of a diol unit (P1) represented by Formula (P1), a diol unit (P2) represented by Formula (P2), a diol unit (P3) represented by Formula (P3), a diol unit (P5) represented by Formula (P5), and a diol unit (P6) represented by Formula (P6), the polyester resin (1) further includes a unit including a biphenyl skeleton, and end groups of the polyester resin (1) do not include fluorine atoms. ##STR00001##

Provided is an electrophotographic photosensitive member including in this order: a support; an undercoat layer; and a photosensitive layer, wherein the undercoat layer contains a polymer having a structural unit represented by the following formula (1).

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A novel compound having electron-transporting property which dissolves sufficiently in an organic solvent is provided.

Provided is an electrophotographic photosensitive member including in this order: a support; an undercoat layer, and a photosensitive layer, wherein the undercoat layer comprises at least one kind of polymer selected from the group consisting of: a polymer having a structural unit represented by the following formula (1); and a polymer having a structural unit represented by the following formula (2).

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Provided is an electrophotographic photosensitive member including a support and a photosensitive layer, wherein the photosensitive layer contains two kinds of benzimidazoperylene compounds as electron transporting substances.

An image forming apparatus includes an image bearing member unit; a developing unit; an accommodating portion configured to accommodate the image bearing member unit and the developing unit and provided with an inserting opening; a door for the opening; a pressing mechanism for pressing and releasing the image bearing member unit and the developing unit relative to each other in interrelation with the openable member; and a contact surface provided on the openable member, the contact surface is contactable with an upstream end portion of one of the units, when the openable member is closed in a state that the upstream end portion is projected out of the opening, wherein an angle formed between a normal line of the contact surface and the inserting direction in a downstream side is not less than 90 degrees.

An image forming method includes forming an image with a toner using a photoconductor in which an intermediate layer and a photosensitive layer including a charge generating layer and a charge transport layer are formed overlying an electroconductive substrate, wherein the ionization potential of the surface of the photoconductor and the ionization potential of the surface of the toner satisfy the following relations 1 and 2,

|Ip(the surface of the photoconductor)Ip(the surface of the toner)|0.18 (eV) Relation 1

5.45 (eV)Ip(the surface of the photoconductor)5.53 (eV) Relation 2 where Ip (the surface of the photoconductor) represents the ionization potential of the surface of the photoconductor and Ip (the surface of the toner) represents the ionization potential of the surface of the toner.

The electrophotographic photosensitive member includes a support and a photosensitive layer on the support, in which a surface layer of the electrophotographic photosensitive member contains a particle, the surface layer has a particle partially exposed from the surface layer among the particle contained in the surface layer, the particle has a volume average particle diameter of 50.0 nm or more and 350.0 nm or less; in a cross-section of the surface layer, the number of the particle partially exposed from the surface layer is 80% by number or more based on a total number of the particle contained in the surface layer; and a total volume of an exposed portion of the particle partially exposed from the surface layer is 30% by volume or more and 80% by volume or less based on an entire volume of the particle contained in the surface layer.