摘要:
Disclosed is a corona charging apparatus for electrically charging a surface of an image bearing member to which the corona charging apparatus faces and which is rotatably provided in an electrophotographic image forming apparatus, the corona charging apparatus including: a discharging electrode; a shield case that covers the discharging electrode, the shield case being opened at least in a region where the discharging electrode and the image bearing member face each other; and a sheet-like member being made from aluminum and being attached to a first surface of the shield case which first surface faces the discharging electrode.
摘要:
A charging device is provided. A charging device includes a charging section and a discharge product adsorption removal section. The charging section includes a shield case having a shield opening, a discharge electrode, and a rotation shaft which is parallel to a rotation axis of a photoreceptor. The discharge product adsorption removal section has an adsorption layer that adsorbs a discharge product and is disposed downward in a vertical direction of the photoreceptor. The charging section is displaceable about an axial line of the rotation shaft from a position where the shield opening opposes to the photoreceptor to a position where the shield opening opposes to the discharge product adsorption removal section.
摘要:
Disclosed is a corona charging apparatus for electrically charging a surface of an image bearing member to which the corona charging apparatus faces and which is rotatably provided in an electrophotographic image forming apparatus, the corona charging apparatus including: a discharging electrode; a shield case that covers the discharging electrode, the shield case being opened at least in a region where the discharging electrode and the image bearing member face each other; and a sheet-like member being made from aluminum and being attached to a first surface of the shield case which first surface faces the discharging electrode.
摘要:
A charging device is provided. A charging device includes a charging section and a discharge product adsorption removal section. The charging section includes a shield case having a shield opening, a discharge electrode, and a rotation shaft which is parallel to a rotation axis of a photoreceptor. The discharge product adsorption removal section has an adsorption layer that adsorbs a discharge product and is disposed downward in a vertical direction of the photoreceptor. The charging section is displaceable about an axial line of the rotation shaft from a position where the shield opening opposes to the photoreceptor to a position where the shield opening opposes to the discharge product adsorption removal section.
摘要:
An electrophotographic photoconductor containing a conductive substrate and at least a charge generating layer and a charge transporting layer successively layered on the substrate, wherein the charge transporting layer contains a charge transporting material (M) and a binder resin (B) and further has a layered structure composed of a plurality of the charge transporting layers wherein the outermost layer of the charge transporting layers show 50% or higher elastic power (ηHu) and hardness (Hplast) of plastic deformation in a range from 220 N/mm2 or higher to 275 N/mm2 or lower.
摘要翻译:一种电子照相感光体,其含有导电性基板和至少具有电荷产生层和电荷输送层的电荷输送层,所述电荷输送层依次层叠在所述基板上,所述电荷输送层含有电荷输送材料(M)和粘合剂树脂(B),并且还具有层叠体 由多个电荷输送层构成的结构,其中电荷输送层的最外层显示出在220N / mm 2以上至275N以下的塑性变形的50%以上的弹性功率(η)和硬度(Hplast) / mm2以下。
摘要:
An electrophotographic photoreceptor which is excellent in the cleaning property and does not deteriorates the image quality for the formed images during long time use, and capable of forming images at high sensitivity, high resolution and high image quality, is provided. A photosensitive layer provided on a conductive substrate of an electrophotographic photoreceptor contains an oxotitanium phthalocyanine of a crystal form showing a diffraction peak at least at 27.3° in view of the Bragg angle 2θ in the X-ray diffraction spectrum and a surface free energy (γ) on a surface thereof is set to range from no less than 20 mN/m to no more than 35 mN/m. Such a inclusion of the oxotitanium phthalocyanine of specified crystal form enables formation of an image excellent in sensitivity and resolution and the control of a foreign matter depositing force when γ is set to an appropriate range, thus delivering a good cleaning performance.
摘要:
An electrophotographic photoreceptor using a non-contact type charging process has a creep value CIτ of is 2.70% or more, preferably 3.00% or more, and a Vickers hardness (HV) at its surface of 20≦HV≦25 in a case where a maximum indenting load of 30 mN is loaded to the surface under a circumstance at a temperature of 25° C. and at a relative humidity of 50%. Since such an electrophotographic photoreceptor is excellent in flexibility and has plasticity not too soft nor exhibiting fragility, the amount of film reduction due to wear is decreased during long time use, excellent surface smoothness is ensured, and there is no occurrence of injury or unevenness in density to the formed images.
摘要:
An electrophotographic photoconductor comprising a conductive substrate and at least a charge generating layer and a charge transporting layer successively layered on the substrate, wherein the charge transporting layer comprises a charge transporting material (M) and a binder resin (B) which contains, as a main component, a compound represented by the general formula (1): in which R1, R2, R3, R4, R5, R6, R7 and R8, may be the same or different each other and each independently denote a hydrogen atom, a halogen atom, or a substituted or unsubstituted C1 to C6 alkyl group; and R9 and R10 may be the same or different each other and each independently denote a hydrogen atom, a halogen atom, a substituted or unsubstituted C1 to C6 alkyl group, a saturated cyclic C4 to C10 hydrocarbyl group, or a substituted or unsubstituted aryl group; and n denotes an integer: and further has a layered structure composed of a plurality of said charge transporting layers wherein the outermost layer of the said charge transporting layers show 50% or higher elastic power (ηHU) measured in the surface coating hardness test by applying a highest pushing load of 5 mN to the surface layer at ambient temperature of 25° C. and at 50% relative humidity and hardness (Hplast) of plastic deformation in a range from 220 N/mm2 or higher to 275 N/mm2 or lower. The ratio M/B by weight of the charge transporting material (M) of the outermost layer and the binder resin (B) is controlled to be preferably 30/70 or lower and more preferably in a range from 7/93 or higher and 20/80 or lower and a preferable enamine type charge transporting material (2) is added to obtain an electrophotographic photoconductor excellent in printing durability and high photo-response.