Abstract: A cleaning member includes a core and an elastic layer that is helically wound around an outer peripheral surface of the core. The elastic layer is divided into three or more elastic layer sections in a width direction, and a width of the elastic layer sections at both ends in the width direction is greater than a width of the one or more elastic layer sections in a central region between the elastic layer sections at both ends in the width direction. Alternatively, the elastic layer is divided into three or more elastic layer sections in the width direction, and a minimum thickness of the elastic layer sections at both ends in the width direction is smaller than a minimum thickness of the one or more elastic layer sections in the central region between the elastic layer sections at both ends in the width direction.

Abstract: A cleaning body includes a shaft and an elastic layer that is helically wound around the shaft from one end side to the other end side of the shaft and fixed on the shaft and that cleans a body to be cleaned while the elastic layer rotates. The elastic layer includes a division portion having plural divided segments and having a length of from 20% to 70% of the full length of the elastic layer. The division portion is located in a longitudinal central portion of the elastic layer. In the sectional view perpendicular to the axial direction of the shaft, a minimum thickness part in the longitudinal central portion of the elastic layer is from 5% to 12% thicker than a minimum thickness part in each longitudinal end portion of the elastic layer.

Abstract: A cleaning member includes a core and an elastic layer that is helically wound around an outer peripheral surface of the core. The elastic layer is divided into three or more elastic layer sections in a width direction, and a width of the elastic layer sections at both ends in the width direction is greater than a width of the one or more elastic layer sections in a central region between the elastic layer sections at both ends in the width direction. Alternatively, the elastic layer is divided into three or more elastic layer sections in the width direction, and a minimum thickness of the elastic layer sections at both ends in the width direction is smaller than a minimum thickness of the one or more elastic layer sections in the central region between the elastic layer sections at both ends in the width direction.

Abstract: A cleaning body includes a shaft and an elastic layer that is helically wound around the shaft from one end side to the other end side of the shaft and fixed on the shaft and that cleans a body to be cleaned while the elastic layer rotates. The elastic layer includes a division portion having plural divided segments and having a length of from 20% to 70% of the full length of the elastic layer. The division portion is located in a longitudinal central portion of the elastic layer. In the sectional view perpendicular to the axial direction of the shaft, a minimum thickness part in the longitudinal central portion of the elastic layer is from 5% to 12% thicker than a minimum thickness part in each longitudinal end portion of the elastic layer.

Abstract: A cleaning member includes a core and an elastic layer helically wound around an outer peripheral surface of the core so as to extend from one end to the other end of the core. When the cleaning member is rotated by a member to be cleaned, a non-contact region in which a first end portion and a second end portion of the elastic layer in an axial direction of the core are not in contact with the member to be cleaned is in a range from approximately 0° to approximately 60° in terms of a rotation angle of the cleaning member viewed from one side in the axial direction of the core.

Abstract: A cleaning member includes a core and an elastic layer disposed on an outer peripheral surface of the core. A circumferential cover length over which the elastic layer covers the core in a circumferential direction is greater at least at one of first and second end portions in an axial direction of the core than at a central portion in the axial direction. The central portion in the axial direction extends from one end to the other end of the core in the axial direction. When the cleaning member is rotated by a member to be cleaned, a non-contact region in which the first and second end portions in the axial direction are not in contact with the member to be cleaned is in a range from approximately 0° to approximately 15° in terms of a rotation angle of the cleaning member viewed from one side in the axial direction.

Abstract: A cleaning member includes a core and an elastic layer helically wound around an outer peripheral surface of the core so as to extend from one end to the other end of the core. When the cleaning member is rotated by a member to be cleaned, a non-contact region in which a first end portion and a second end portion of the elastic layer in an axial direction of the core are not in contact with the member to be cleaned is in a range from approximately 0° to approximately 60° in terms of a rotation angle of the cleaning member viewed from one side in the axial direction of the core.

Abstract: A cleaning member includes a core and an elastic layer disposed on an outer peripheral surface of the core. A circumferential cover length over which the elastic layer covers the core in a circumferential direction is greater at least at one of first and second end portions in an axial direction of the core than at a central portion in the axial direction. The central portion in the axial direction extends from one end to the other end of the core in the axial direction. When the cleaning member is rotated by a member to be cleaned, a non-contact region in which the first and second end portions in the axial direction are not in contact with the member to be cleaned is in a range from approximately 0° to approximately 15° in terms of a rotation angle of the cleaning member viewed from one side in the axial direction.

Abstract: A cleaning device includes a cleaning member, which includes a shaft portion and an elastic layer. The shaft portion is disposed so as to extend in an rotation axis direction of a rotating object that is to be cleaned. The elastic layer is helically disposed on an outer circumferential surface of the shaft portion from one end portion to the other end portion in an axial direction. The elastic layer touches an outer circumferential surface of the object and at least one end surface of the object in the rotation axis direction. A relationship between a cross-sectional area Sa of the object taken perpendicular to an axis of the object and a cumulative total contact area Sb of a portion of the end surface of the object in the rotation axis direction touched by the elastic foam layer during one rotation of the object satisfies 0.11?Sb/Sa<0.30.

Abstract: A cleaning device includes a cleaning member, which includes a shaft portion and an elastic layer. The shaft portion is disposed so as to extend in a rotation axis direction of a rotating object that is to be cleaned. The elastic layer is helically disposed on an outer circumferential surface of the shaft portion from one end portion to the other end portion in an axial direction. The elastic layer touches an outer circumferential surface of the object and at least one end surface of the object in the rotation axis direction. A relationship between a cross-sectional area Sa of the object taken perpendicular to an axis of the object and a cumulative total contact area Sb of a portion of the end surface of the object in the rotation axis direction touched by the elastic layer during one rotation of the object satisfies 0.11?Sb/Sa<0.30.

Abstract: Provided is a cleaning member including a helical convex section formed on an outer peripheral surface, wherein the cleaning member comes into complete contact with a target cleaning member in an axial direction of the target cleaning member, and rotates in contact with the target cleaning member rotating around an axis.

Abstract: Provided is a cleaning member including a helical convex section formed on an outer peripheral surface, wherein the cleaning member comes into complete contact with a target cleaning member in an axial direction of the target cleaning member, and rotates in contact with the target cleaning member rotating around an axis.

Abstract: A cleaning member includes a core, and an elastic layer including a strip-shaped elastic member that is spirally wound around a region of an outer peripheral surface of the core ranging from one end to another end of the core, wherein a width W1 of the elastic layer is less than or equal to a radius R of the core and is 1 mm or more.

Abstract: Provided is a cleaning member, including a shaft portion, a foam elastic layer that is disposed helically from one end side in an axial direction to the other end side in the axial direction on an outer circumferential surface of the shaft portion, and an adhesive layer that adheres the shaft portion to the foam elastic layer, wherein the foam elastic layer is subjected to a compression process in a radial direction of the shaft portion at a portion of a circumferential direction at an end portion in the axial direction of the shaft portion, and a circumferential direction coverage width of a non-compressed region at the end portion in the axial direction which is subjected to the compression process is wider than a circumferential direction coverage width at a center portion in the axial direction of the shaft portion.

Abstract: A cleaning member includes a core, and an elastic layer including a strip-shaped elastic member that is spirally wound around a region of an outer peripheral surface of the core ranging from one end to another end of the core, wherein a width W1 of the elastic layer is less than or equal to a radius R of the core and is 1 mm or more.

Abstract: A cleaning member for an image forming apparatus, includes a core, a foamed elastic layer disposed by winding a strip-shaped foamed elastic member on an outer peripheral surface of the core in a helical form so as to extend from one end of the core to the other end, and a bonding layer for bonding the core and the foamed elastic layer together, wherein the area of a region within a surface at one or both ends at least in a longitudinal direction of the foamed elastic layer on a side facing the outer peripheral surface of the core, contacting the outer peripheral surface of the core via the bonding layer is substantially 35% or more by area ratio per unit area.

Abstract: A cleaning member for an image forming apparatus includes a core member, a foamed elastic layer in which two or more strip-shaped foamed elastic members connected together at one or both of longitudinal end portions are spirally wound around the outer peripheral surface of the core member from one end of the core member to the other end thereof, and an adhesive layer for bonding the core member and the foamed elastic layer together.

Abstract: An electrophotographic photoconductor includes a base, an undercoat layer that contains a metal oxide and an electron-accepting material and has a thickness of about 3 ?m or more and about 15 ?m or less, and a photosensitive layer containing a polymer having a repeating unit represented by general formula (1) where R1 and R2 each independently represent a halogen atom, an alkyl group having 1 to 6 carbon atoms, a cycloalkyl group having 5 to 7 carbon atoms, or an aryl group having 6 to 12 carbon atoms; and m and n each independently represent an integer of 0 to 4.

Abstract: An electrophotographic photoreceptor, includes: a conductive support; and a photosensitive layer provided on or above the conductive support, the photosensitive layer including an outermost surface layer at the farthest location from the conductive support, wherein the outermost surface layer contains: coated insulating inorganic particles obtained by subjecting insulating inorganic particles having a specific surface area of not more than about 300 m2/g to a coating treatment with an aromatic functional group-containing compound; and fluorine-containing organic particles.

Abstract: A cleaning member for an image forming apparatus includes a core member, a foamed elastic layer in which two or more strip-shaped foamed elastic members connected together at one or both of longitudinal end portions are spirally wound around the outer peripheral surface of the core member from one end of the core member to the other end thereof, and an adhesive layer for bonding the core member and the foamed elastic layer together.