摘要:
An electrophotographic photoreceptor including an electroconductive substrate; a photosensitive layer located overlying the electroconductive substrate and including a resin; and a surface layer including a filler and a binder resin, wherein the surface layer and the photosensitive layer have a continuous structure, and wherein the surface layer satisfies the following relationship: σ≦D/5, wherein D represents an average of maximum thicknesses of the surface layer in units of micrometers in 20 segments of 5 μm wide when a portion of a cross section of the photoreceptor of 100 μm wide is divided into the 20 segments, and σ represents a standard deviation of the 20 maximum thicknesses.
摘要:
An electrophotographic photoreceptor including an electroconductive substrate; a photosensitive layer located overlying the electroconductive substrate and including a resin; and a surface layer including a filler and a binder resin, wherein the surface layer and the photosensitive layer have a continuous structure, and wherein the surface layer satisfies the following relationship: &sgr;≦D/5, wherein D represents an average of maximum thicknesses of the surface layer in units of micrometers in 20 segments of 5 &mgr;m wide when a portion of a cross section of the photoreceptor of 100 &mgr;m wide is divided into the 20 segments, and &sgr; represents a standard deviation of the 20 maximum thicknesses.
摘要:
An electrophotographic photoconductor has an electroconductive support and a photoconductive layer formed thereon, which contains a charge transport material with a polycarbonate structure having a triarylamino group at least on the main chain or side chain thereof, and a charge generation material with a phthalocyanine skeleton.
摘要:
An electrophotographic photoconductor comprises (a) an electroconductive support, (b) a photoconductive layer formed thereon comprising a selenium alloy, and (c) a protective layer which is formed on the photoconductive layer, contains a binder resin component and an anti-oxidizing agent. In an electrophotographic copying process and an electrophographic copying apparatus using this photoconductor, the protective layer is abraded at a predetermined rate during the copying process in such a fashion that the anti-oxidizing agent contained in the protective layer is always present at the surface of the protective layer, thereby protecting the photoconductor from ozone and ions which are generated during corona charging of the photoconductor.
摘要:
An electrophotographic photoconductor is disclosed, which comprises an electroconductive layer, on which are formed in order, a photoconductive layer, a charge retention layer and a protective layer, optionally an adhesive layer between the charge retention layer and the protective layer, the charge retention layer comprising a silicone resin which comprises: (a) 50 wt. % to 80 wt. % of silicone and oxygen, (b) 10 wt. % to 30 wt. % of carbon, (c) 1 wt. % to 10 wt. % of hydrogen, and (d) 1 wt. % to 10 wt. % of nitrogen. The photoconductive layer may comprise an As-Se alloy, in which case, it is preferable that the amount of As be in the range of 33 wt. % to 38 wt. % and the balance thereof be Se in the As-Se alloy. Preferably the adhesive layer comprises a hardened material containing a metal alkoxide.
摘要:
An electrophotographic drum-shaped photoconductor has an electroconductive support and a photoconductive layer formed thereon, with a lubricating material being applied to the surface thereof in the shape of a plurality of bands spaced therebetween, constituting band-shaped lubricating material applied areas, extending along a circumference of the drum-shaped photoconductor in the direction perpendicular or substantially perpendicular to an axis of rotation of the drum-shaped photoconductor. An electrophotographic image formation method and an image forming apparatus employing the above-mentioned drum-shaped photoconductor are also disclosed.
摘要:
In an image forming apparatus of the type sequentially executing charging, exposure, development and image transfer, a device for applying a lubricant to the surface of an image carrier includes a lubricant applying member rotatable in contact with the image carrier for applying, at a position where the lubricant applying member contacts the image carrier, the lubricant to the surface of the image carrier while deforming its contour in accordance with a bite of the surface of the image carrier. A lubricant feeding unit feeds the lubricant to the lubricant applying member and includes a lubricant providing unit having a preselected thickness t. The surface of the image carrier bites into the lubricant applying member by an amount T while the lubricant providing unit bites into the lubricant applying member by an amount t' smaller than the amount T, but substantially equal to or slightly greater than the thickness t. The device has a low cost, compact configuration and can use up the lubricant without any waste while desirably applying it to the image carrier.
摘要:
A charging apparatus for a photoconductor composed of an electroconductive charging member and mechanism for feeding a voltage to the charging member. This charging apparatus is composed of a material capable of adsorbing ozone. The charging apparatus may be in the form of a roller type, a blade type or the like. Carbon fibers having micro pores can be used as the charging member.
摘要:
A cleaning unit for use in an image-formation apparatus including a photoconductor, provided with a cleaning member which can be brought into contact with the surface of the photoconductor and is made of an activated carbon fiber as the main component.
摘要:
An electrophotographic photoreceptor including a photosensitive layer on an electroconductive substrate, wherein nitrate ion is present on the surface of the photosensitive layer in an amount of from 50 to 300 μg per 1 m2 of the surface of the photosensitive layer when the nitrate ion is determined by an ion chromatographic method. Preferably a material having a fluorine atom and a carbon atom or a fatty acid metal salt such as zinc stearate is further present on the surface of the photosensitive layer such that the F/C ratio is from 0.05 to 0.5 or the Zn/C ratio is from 0.001 to 0.1. An image forming apparatus using the photoreceptor is also provided.