Abstract: An end member is disposed in an end portion of a columnar rotating body, comprising: a shaft member; and a bearing member which holds the shaft member, wherein the shaft member comprises: a rotating shaft; and a rotating force receiving portion, and wherein at least one of the shaft member and the bearing member has a mechanism where the rotating force receiving portion moves also in a shaft line direction without be inclined by a movement of the rotating force receiving portion in a direction orthogonal to the shaft line direction or by a rotation of the rotating force receiving portion around a shaft line.

Abstract: An end member disposed in an end portion of a columnar rotating body, comprising: a shaft member; and a bearing member to which the shaft member is attached, wherein the bearing member includes a rotating force transmission pin, a tubular body, and a pin holding portion, the shaft member includes a rotating shaft, a rotating force receiving portion, and a base end portion.

Abstract: An end member is disposed in an end portion of a columnar rotating body, comprising: a shaft member; and a bearing member which holds the shaft member, wherein the shaft member comprises: a rotating shaft; and a rotating force receiving portion, and wherein at least one of the shaft member and the bearing member has a mechanism where the rotating force receiving portion moves also in a shaft line direction without be inclined by a movement of the rotating force receiving portion in a direction orthogonal to the shaft line direction or by a rotation of the rotating force receiving portion around a shaft line.

Abstract: An end member disposed in an end portion of a columnar rotating body, comprising: a shaft member; and a bearing member to which the shaft member is attached, wherein the bearing member includes a rotating force transmission pin, a tubular body, and a pin holding portion, the shaft member includes a rotating shaft, a rotating force receiving portion, and a base end portion.

Abstract: Devices and methods for remanufacturing a printer cartridge component are provided. The printer cartridge component is a drum gear assembly configured for attachment to an organic photoconductor (OPC) drum configured for use in a printer cartridge. The drum gear assembly has a drum drive gear and a drive axle attached to the drum drive gear. The drive axle has a first end with teeth portions. The device has a first portion having a drive axle engagement end configured to engage the drive axle. The device further has a second portion coupled to the first portion. The second portion has a teeth engagement portion to engage one or more of the teeth portions of the drive axle. The first portion and the second portion are configured for assembling and disassembling the drum gear assembly.

Abstract: A method of forming an image including an electrophotographic photoreceptor and a toner, wherein a photosensitive layer in the electrophotographic photoreceptor includes an undercoat layer including metal oxide particles, a charge generation layer including hydroxygallium phthalocyanine, and a charge transport layer, and the toner contains toner matrix particles formed in an aqueous medium; the toner has a volume median diameter (Dv50) of from 4.0 ?m to 7.0 ?m; and the relationship between the volume median diameter (Dv50) and the percentage in number (Dns) of toner particles having a particle diameter of from 2.00 ?m to 3.56 ?m satisfies—0.0517EXP(22.4/Dv50)?Dns?0.233EXP(17.3/Dv50) where Dv50 is the volume median diameter (?m) of the toner, and Dns is the percentage in number of toner particles having a particle diameter of from 2.00 ?m to 3.56 ?m.

Abstract: Devices and methods for remanufacturing a printer cartridge component are provided. The printer cartridge component is a drum gear assembly configured for attachment to an organic photoconductor (OPC) drum configured for use in a printer cartridge. The drum gear assembly has a drum drive gear and a drive axle attached to the drum drive gear. The drive axle has a first end with teeth portions. The device has a first portion having a drive axle engagement end configured to engage the drive axle. The device further has a second portion coupled to the first portion. The second portion has a teeth engagement portion to engage one or more of the teeth portions of the drive axle. The first portion and the second portion are configured for assembling and disassembling the drum gear assembly.

Abstract: There is provided a doctor blade assembly and method for alignment in a toner hopper of a toner printer cartridge. The doctor blade assembly has a holder portion. The holder portion has a first mounting end and a second mounting end. The holder portion further has a pair of recessed openings formed in the first mounting end and the second mounting end, respectively. The holder portion further has a pair of alignment elements each having an alignment through hole and each configured to fit in and correspond to each respective recessed opening. The doctor blade assembly further has a blade portion attached to the holder portion. The doctor blade assembly further has a pair of fastener members each configured for insertion through the alignment through hole and through the recessed opening.

Abstract: A coating fluid for photosensitive-layer formation having high productivity and stability and a process thereof are provided. Also provided are a high-performance electrophotographic photoreceptor and an image-forming apparatus which are capable of forming high-quality images even in various use environments and are less apt to cause image defects such as black spots or color spots. The objects are accomplished with a process for producing a coating fluid which is for forming a photosensitive layer of an electrophotographic photoreceptor and comprises a charge-generating material and a binder resin, wherein a dispersing medium having an average particle diameter in the range of from 1.0 ?m to 350 ?m is used as a dispersing medium for dispersing the charge-generating material in the coating fluid for photosensitive-layer formation. The coating fluid for photosensitive-layer formation produced by this process is preferable as a photosensitive layer of an electrophotographic photoreceptor.

Abstract: An object of the invention is to provide a toner which is effective in improving image quality while inhibiting white-background fouling, residual-image phenomenon (ghost), blurring (suitability for solid printing), and the like that occur depending on the proportion of a fine powder having a particle diameter not larger than a specific value, and which has satisfactory removability in cleaning, mitigates problems concerning fouling, etc. in long-term use even on a high-speed printer, and attains excellent image stability. Another object is to provide an image-forming apparatus and a toner cartridge each employing the toner. The invention provides a toner for electrostatic-image development satisfying all of the following (1) to (4) or a toner for electrostatic-image development which is a toner containing a charge control agent and satisfying all of the following (5) to (7). The invention further provides an image-forming apparatus and a toner cartridge each employing the toner.

Abstract: There is provided a doctor blade assembly and method for alignment in a toner hopper of a toner printer cartridge. The doctor blade assembly has a holder portion. The holder portion has a first mounting end and a second mounting end. The holder portion further has a pair of recessed openings formed in the first mounting end and the second mounting end, respectively. The holder portion further has a pair of alignment elements each having an alignment through hole and each configured to fit in and correspond to each respective recessed opening. The doctor blade assembly further has a blade portion attached to the holder portion. The doctor blade assembly further has a pair of fastener members each configured for insertion through the alignment through hole and through the recessed opening.

Abstract: Drive transmission part and system including a coupling member configured to have one or more restricted degrees of freedom, and a gear hub to rotationally engage the coupling member.

Abstract: A method of forming an image on a substrate with an electrophotographic photoreceptor and a toner, a photosensitive layer of the electrophotographic photoreceptor contains a resin having a structural unit represented by the following formula (A) the toner containing toner matrix particles formed in an aqueous medium; the toner has a volume median diameter (Dv50) of from 4.0 ?m to 7.0 ?m; and the relationship between the volume median diameter (Dv50) and the percentage in number (Dns) of toner particles having a particle diameter of from 2.00 ?m to 3.56 ?m satisfies following formula (1) Dns?0.233EXP(17.3/Dv50)??(1).

Abstract: Provided is a coating liquid for forming an undercoat layer of an electrophotographic photoreceptor exhibiting high stability. In the coating liquid for forming an undercoat layer of an electrophotographic photoreceptor containing metal oxide particles and a binder resin, the metal oxide particles have a cumulative volume average diameter D50 of 0.1 ?m or less and a volume particle size distribution width index SD satisfying the following Expression (1) which are measured by a dynamic light-scattering method in the coating liquid for forming an undercoat layer, 0.010?SD?0.040??(1) where SD=(D84?D16)/2, where D84 represents the particle diameter (?m) at a point of 84% in the cumulative volume particle size distribution curve, and D16 represents the particle diameter (?m) at a point of 16% in the cumulative volume particle size distribution curve.

Abstract: An electrophotographic photoreceptor having high sensitivity and hardly affected by the transfer in an electrophotographic process is provided. The electrophotographic photoreceptor includes an undercoat layer containing metal oxide particles and a binder resin and a photosensitive layer disposed on the undercoat layer, wherein the metal oxide particles have a volume average particle diameter of 0.1 ?m or less and a 90% cumulative particle diameter of 0.3 ?m or less which are measured by a dynamic light-scattering method in a liquid of the undercoat layer dispersed in a solvent mixture of methanol and 1-propanol at a weight ratio of 7:3, and the photosensitive layer contains a binder resin having an ester bond.

Abstract: An electrophotographic photoreceptor having high sensitivity and low residual potential is provided. The electrophotographic photoreceptor includes an undercoat layer containing metal oxide particles and a binder resin on an electroconductive substrate, and a photosensitive layer disposed on the undercoat layer, wherein the metal oxide particles have a volume average particle diameter of 0.1 ?m or less and a 90% cumulative particle diameter of 0.3 ?m or less which are measured by a dynamic light-scattering method in a liquid of the undercoat layer dispersed in a solvent mixture of methanol and 1-propanol at a weight ratio of 7:3; and the photosensitive layer contains crystalline phthalocyanine showing at least one distinct main diffraction peak at a Bragg angle (2?±0.2°) of 27.0° to 29.0° in an X-ray diffraction spectrum.

Abstract: An image forming apparatus comprising an electrophotographic photoreceptor having a photosensitive layer on an electroconductive substrate, and a toner for developing an electrostatic charge image, wherein the photosensitive layer of the electrophotographic photoreceptor contains a phthalocyanine obtained via an acid paste step; the toner for developing an electrostatic charge image is a toner for developing an electrostatic charge image containing toner matrix particles formed in an aqueous medium; the toner has a volume median diameter (Dv50) of from 4.0 ?m to 7.0 ?m; and the relationship between the volume median diameter (Dv50) and the percentage in number (Dns) of toner particles having a particle diameter of from 2.00 ?m to 3.56 ?m satisfies the following formula (1): Dns?0.233 EXP(17.3/Dv50)??(1).

Abstract: An image forming apparatus comprising an electrophotographic photoreceptor having a photosensitive layer on an electroconductive substrate, and a toner for developing an electrostatic charge image, wherein the photosensitive layer of the electrophotographic photoreceptor contains a phthalocyanine obtained via an acid paste step; the toner for developing an electrostatic charge image is a toner for developing an electrostatic charge image containing toner matrix particles formed in an aqueous medium; the toner has a volume median diameter (Dv50) of from 4.0 ?m to 7.0 ?m; and the relationship between the volume median diameter (Dv50) and the percentage in number (Dns) of toner particles having a particle diameter of from 2.00 ?m to 3.56 ?m satisfies the following formula (1): Dns?0.233 EXP(17.3/Dv50)??(1).

Abstract: An image forming apparatus containing an electrophotographic photoreceptor and a toner for developing an electrostatic charge image, where the electrophotographic photoreceptor has an undercoat layer containing metal oxide particles; the toner for developing an electrostatic charge image is a toner for developing an electrostatic charge image containing toner matrix particles formed in an aqueous medium; the toner has a volume median diameter (Dv50) of from 4.0 ?m to 7.0 ?m; and the relationship between the volume median diameter (Dv50) and the percentage in number (Dns) of toner particles having a particle diameter of from 2.00 ?m to 3.56 ?m satisfies the following formula (1): Dns?0.233EXP(17.3/Dv50)??(1) where Dv50 is the volume median diameter (?m) of the toner, and Dns is the percentage in number of toner particles having a particle diameter of from 2.00 ?m to 3.56 ?m.

Abstract: An image forming apparatus containing an electrophotographic photoreceptor and a toner for developing an electrostatic charge image, where the electrophotographic photoreceptor has an electroconductive substrate with a surface roughness Ra of from 0.01 ?m to 0.3 ?m; the toner for developing an electrostatic charge image is a toner for developing an electrostatic charge image containing toner matrix particles formed in an aqueous medium; the toner has a volume median diameter (Dv50) of from 4.0 ?m to 7.0 ?m; and the relationship between the volume median diameter (Dv50) and the percentage in number (Dns) of toner particles having a particle diameter of from 2.00 ?m to 3.56 ?m satisfies formula (1): Dns?0.233EXP(17.3/Dv50)??(1) where Dv50 is the volume median diameter (?m) of the toner, and Dns is the percentage in number of toner particles having a particle diameter of from 2.00 ?m to 3.56 ?m.