Abstract: A compound useful for a positive charge type electrophotographic photoreceptor with high sensitivity for copiers and printers by using such a novel organic material as a charge transport substance in a photosensitive layer and an electrophotographic apparatus using the same. The compound has a structure represented by the following general formula (I). (In the general formula (I), R1, R2, R3, and R4 each is an alkyl group or the like; R5 and R6 each-is an aryl group or the like; and Z represents a structure having the following general formula (F-A), (F-B) or (F-C). (In the formulae, R7 and R8 each is an optionally substituted alkyl group; m and n each represents an integer of from 0 to 2; and X is a sulfur atom or an oxygen atom.).

Abstract: A compound having a superior electron-transporting property useful for electrophotographic photoconductors and organic ELs, a positive charge type electrophotographic photoconductor for high sensitive copiers or printers and an electrophotographic apparatus using the same, by using the organic compound in a photosensitive layer as an electron-transporting material are provided. The present invention relates a quinone compound having a structure represented by Formula (I): (wherein R1, R2, R3, R4, R5, R6, R7 and R8 each denote hydrogen or an alkyl; R9 and R10 each denote hydrogen, an alkyl, aryl, or heterocyclic group; R11 and R12 each denote a halogen, an alkyl, alkoxy, alkyl halide, nitro, aryl, or heterocyclic group; n and m each denote an integer of 0 to 4; A denotes oxygen or SO2; and the substituent is a halogen, an alkyl, alkoxy, alkyl halide, nitro, aryl, or heterocyclic group), an electrophotographic photoconductor, and an electrophotographic apparatus using the same.

Abstract: A highly sensitive positively charged type electrophotographic photoconductor includes an organic compound that transports electrons efficiently, improving light emission efficiency. The photoconductor is used in an electrophotographic drum, an electrophotographic cartridge and an electrophotographic apparatus.

Abstract: An electrophotographic photoreceptor has excellent electrical properties and is stable even upon repeated use. An electrophotographic apparatus using the electrophotographic photoreceptor uses a compound having an excellent electron transporting ability in a photosensitive layer of the electrophotographic photoreceptor. An electrophotographic photoreceptor, in which a photosensitive layer is located on an electrically conductive substrate either directly or via an undercoat layer, contains a compound having a structure represented by the general formula (I). An electrophotographic apparatus contains the above-mentioned electrophotographic photoreceptor, and carries out a charging process through a positive charging process.

Abstract: Quinomethane compounds having a structure represented by the general formula (1): wherein R1 to R4 and R9 to R12 are the same or different and each represents a hydrogen atom, an alkyl group having 1 to 12 carbon atoms, a cyclic alkyl group, an aryl group, or an alkoxy group having 1 to 6 carbon atoms; R5 and R6 are the same or different and each represents an alkyl group having 1 to 12 carbon atoms, an aryl group, or a heterocyclic group; R7 and R8 each represents a hydrogen atom; and optional substituents are each a halogen atom, an alkyl group having 1 to 6 carbon atoms, an alkoxy group having 1 to 6 carbon atoms, an aryl group, or a heterocyclic group. Since these compounds transport electrons efficiently, they are useful in electrophotographic photoreceptors and/or organic electroluminescence applications.

Abstract: An electrophotography photosensitive body has a single layer photosensitive layer on top of a conductive substrate, directly or via an undercoat layer. The single layer photosensitive layer contains at least a resin binder, a charge generating substance, and a charge transport substance, wherein at least one of the charge generating substances is a titanyl phthalocyanine, which, in a x-ray powder diffraction spectrum having a radiation source of CuK &agr; and within a range of a Bragg angle 2&thgr;=5˜35°, a ratio, R, of a value, P, of a diffraction intensity of a highest peak and a value, B, of a diffraction intensity of the background satisfies the equation R=(P−B)/B≦7.0. The resulting electrophotographic photosensitive layer shows excellent electrical properties with positive charging as well as excellent stability when repeatedly used.

Abstract: A highly sensitive positively charged type electrophotographic photoconductor includes an organic compound that transports electrons efficiently, improving light emission efficiency. The photoconductor is used in an electrophotographic drum, an electrophotographic cartridge and an electrophotographic apparatus.

Abstract: An electrophotographic photoreceptor has excellent electrical properties and is stable even upon repeated use. An electrophotographic apparatus using the electrophotographic photoreceptor uses a compound having an excellent electron transporting ability in a photosensitive layer of the electrophotographic photoreceptor. An electrophotographic photoreceptor, in which a photosensitive layer is located on an electrically conductive substrate either directly or via an undercoat layer, contains a compound having a structure represented by the general formula (I).

Abstract: Quinomethane compounds having a structure represented by the general formula (1): 1

Abstract: A biphenyl derivative is included in a photosensitive layer of an electrophotographic photoconductor. The electrophotographic photoconductor includes a single-layer photosensitive layer coated on a conductive substrate. The photosensitive layer includes a resin binder, a charge generation substance, a hole transport substance, and an electron transport substance. An electrophotographic apparatus using such an electrophotographic photoconductor has excellent electrical characteristics in a positive chargine system and is stable in repeated use.

Abstract: An electrophotography photosensitive body has a single layer photosensitive layer on top of a conductive substrate, directly or via an undercoat layer. The single layer photosensitive layer contains at least a resin binder, a charge generating substance, and a charge transport substance, wherein at least one of the charge generating substances is a titanyl phthalocyanine, which, in a x-ray powder diffraction spectrum having a radiation source of CuK &agr; and within a range of a Bragg angle 2 &thgr;=5˜35°, a ratio, R, of a value, P, of a diffraction intensity of a highest peak and a value, B, of a diffraction intensity of the background satisfies the equation R=(P−B)/B≦7.0. The resulting electrophotographic photosensitive layer shows excellent electrical properties with positive charging as well as excellent stability when repeatedly used.

Abstract: In a electrophotographic photoconductor having a single layer type photosensitive layer 3 laminated directly or through an undercoat layer 2 on an electroconductive substrate 1, the single layer type photosensitive layer 3 contains at least a resin binder, a charge generating substance, a hole transfer substance and an electron transfer substance, wherein the hole transfer substance is a compound represented by the general formula (HT1) shown below and an electrophotographic apparatus comprise this photoconductor. This electrophotographic photoconductor has good electric property in positive charge and good stability in repeated use.

Abstract: An organic electrophotographic photoconductor diminished in an image trouble due to history of a transfer process in a reversal development system is disclosed. The above organic electrophotographic photoconductor is called a separated-function laminated type organic electrophotographic photoconductor, which has an undercoat layer and a photosensitive layer laminated in this order on a conductive substrate, the photosensitive layer comprising a charge generation layer laminated on the undercoat layer and containing an organic compound, and a charge transport layer laminated on the charge generation layer and containing an organic compound. For the charge generation layer, a titanyloxyphthalocyanine compound is used as a charge generation material. The present invention uses the titanyloxyphthalocyanine compound having a clear diffraction peak at a Bragg angle (2.theta.) of 9.6.degree..+-.0.2.degree. or 27.3.degree..+-.0.2.degree. for CuK.alpha. characteristic X-ray (wavelength 1.541 .ANG.).

Abstract: A bicycle electricity generator is provided including an annular stator and an annular rotor, both of which are coaxially mounted on a bicycle wheel axle in a position between a bicycle wheel hub and a fork, wherein the stator is fixed either on the wheel axle or on the fork; the rotor is fixed in connection with the bicycle wheel hub, the rotor's rotating center being coincident with the rotating center of the bicycle wheel; a rotating force transmitting member made of a resilient material for transmitting a rotating force from the hub to the rotor is provided in a position between the rotor and the hub so as to form frictional engagement with both the rotor and the hub, wherein either an auxiliary transmitting structure is provided for auxiliarily transmitting a rotating force from the bicycle wheel hub to the rotor and wherein one portion of the auxiliary transmitting structure is fixedly secured with respect to the rotor and another portion of the auxiliary transmitting member is fixedly secured with resp

Abstract: An electrophotographic photoconductor is provided which principally consists of an electrically conductive substrate, a charge generation layer, and a charge transport layer which contains an orange dye compound. Preferably, the orange dye compound is selected from the group consisting of 1-o-tolylazo-2-naphthol, 5-(9-anthracenyl methylene) amino-3-methyl-1-tolylpyrazole, 4,5-diiodo-3,6-fluoranediol, and 4,5-dibromo-3,6-fluoranediol.

Abstract: A titanyloxyphthalocyanine crystal to be used as a charge generation material for an electrophotographic photoreceptor, having a maximum diffraction intensity observed at Bragg angle (2 .theta.) of 9.6.degree..+-.0.2.degree. and clear peaks of diffraction intensity observed at 7.22.degree..+-.0.2.degree., 9.60.degree..+-.0.2.degree., 11.60.degree..+-.0.2.degree., 13.40.degree..+-.0.2.degree., 14.88.degree..+-.0.2.degree.,18.34.degree..+-.0.2.degree., 23.62.degree..+-.0.2.degree., 24.14.degree..+-.0.2.degree., and 27.32.degree..+-.0.2.degree., respectively, in an X-ray diffraction spectrum obtained by performing an x-ray diffraction method using CuK.alpha. as a source of radiation. A method for preparing the crystal includes dispersing a predetermined amount of amorphous titanyloxyphthalocyanine in an aqueous solution in which ionic substances are dissolved, under mechanical force at a temperature of under 50.degree. C.

Abstract: An electrophotographic photoreceptor includes a conductive substrate and a photosensitive layer including a charge generation material and a charge transport material. The charge generation material is a titanyloxyphthalocyanine crystal having a maximum diffraction intensity observed at Bragg angle (2.theta.) of 9.6.degree..+-.0.2.degree. and clear peaks of diffraction intensity observed at 7.22.degree..+-.0.2.degree., 9.60.degree..+-.0.2.degree., 11.60.degree..+-.0.2.degree., 13.40.degree..+-.0.2.degree., 14.88.degree..+-.0.2.degree., 18.34.degree..+-.0.2.degree., 23.62.degree..+-.0.2.degree., 24.14.degree..+-.0.2.degree., and 27.32.degree..+-.0.2.degree., respectively, in a X-ray diffraction spectrum obtained by performing a X-ray diffraction method using CuK.alpha. as a source of radiation, and having a lattice constant of:a=16.3058 .ANG., b=23.078 .ANG., and c=8.7115 .ANG.,.alpha.=101.352.degree., .beta.=23.078.degree., and .gamma.=117.530.degree. ,with an allowable error of .+-.1%.