摘要:
Scanning optical device is provided with a light source unit, a deflector for deflecting light beam from the light source, a deflector driving circuit for driving the deflector and an optical housing for accommodating the deflector and the deflector driving circuit. The device is further provided with a cover for closing the optical housing. The cover is provided with an opening through which the deflector driving circuit is exposed to the external air. The hole in the cover is constituted by a tubular partition wall integrally formed with the cover.
摘要:
A dihydric phenol compound represented by the following formula (2), a phosgene compound, and an aliphatic tertiary amine are mixed together using a hydrophobic organic solvent to produce bischloroformate that is represented by the following formula (1) and has an average number of repeating units (n) of 1.99 or less. In the formulae (1) and (2), Ar is a divalent aromatic group.
摘要:
An optical deflection/scanning apparatus includes a rotary polygon mirror for reflectively scanning a light beam and a motor for rotating the rotary polygon mirror. The motor has a rotor yoke and a rotor magnet. The rotor magnet is attached inside of the rotor yoke such that a curved portion of the rotor yoke projects vertically from one end of the rotor magnet so as to prevent any trouble caused on the lower end of the rotor due to a centrifugal force during rotation of the rotary polygon mirror.
摘要:
A bearing device is structured to include a stator portion which includes one of a shaft and a sleeve, a rotor portion which includes the other of the shaft and the sleeve which are structured to be capable of relative rotation therebetween, a first permanent magnet mounted on the rotor portion, and a second permanent magnet mounted at a position opposed to the first permanent magnet. The rotor portion is floated up relative to the stator portion by a magnetic force working between the first permanent magnet and the second permanent magnet. The first permanent magnet is mounted on the upper end portion of the rotor portion, the second permanent magnet is mounted on the upper end portion of the stator portion, and the first permanent magnet and the second permanent magnet are provided in opposed relationship with each other in a circumferential direction perpendicular to an axial direction of the bearing device.
摘要:
A polycarbonate copolymer includes a repeating unit represented by a formula (1) below and a molar copolymer composition represented by Ar2/(Ar1+Ar2) in a range of 25 mol % to 50 mol %. In the formula (1): Ar1 and Ar2 represent a divalent aromatic group; a chain end is terminated by a monovalent aromatic group or a monovalent fluorine-containing aliphatic group; and n represents an average repeating number of an Ar1 block and is a numeral of 1.0 to 3.0, provided that Ar1 and Ar2 are not the same.
摘要:
A dihydric phenol compound represented by the following formula (2), a phosgene compound, and an aliphatic tertiary amine are mixed together using a hydrophobic organic solvent to produce bischloroformate that is represented by the following formula (1) and has an average number of repeating units (n) of 1.99 or less. In the formulae (1) and (2), Ar is a divalent aromatic group.
摘要:
An electrophotographic photosensitive body having a photosensitive layer on a conductive base, in which at least the outermost layer thereof contains particles having a double structure composed of a core member and a shell member having a larger rubber hardness than the core member. The electrophotographic photosensitive body has excellent mechanical strength such as wear resistance, abrasion resistance, and scratch resistance as well as excellent electrophotographic characteristics such as cleaning properties over time.
摘要:
An optical scanning apparatus includes a light source; a deflection scanner for scanningly deflecting a laser beam emitted by the light source; a deflection member for deflecting a part of the laser beam emitted by the light source, the deflection member being disposed between the light source and the deflection scanner; a common sensor for receiving the laser beam emitted by the light source; wherein the common sensor receives both of the laser beam deflected by the deflection member before it is incident on the deflection scanner and the laser beam scanningly deflected by the deflection scanner.
摘要:
A polycarbonate and a method of preparing the polycarbonate which comprises a repeating unit represented by the following general formula ##STR1## wherein each of R.sup.1 and R.sup.2 respectively is a halogen atom, an alkyl group, a cycloalkyl group or an aryl group, each of a and b is an integer of 0 to 4, and X is a single bond, --O--, --CO--, --S--, --SO--, --SO.sub.2 --, --CR.sup.3 R.sup.4 --, a 1,1-cycloalkylidene group or an .alpha.,.omega.-alkylene group, and end groups represented by the following general formulas ##STR2## wherein, R.sup.5 is a perfluoroalkyl group or substituted perfluoroalkyl group of 1 to 30 carbon atoms, Y is --CH.sub.2 --, e is an integer of 0 to 6, Z is --O--, --CO--, --OCO--, --S--, --SO--, --SO.sub.2 -- or --NHCO--, f is 0 or 1, R.sup.6 is a halogen atom, an alkyl group, a cycloalkyl group or an aryl group, and each of c and d is an integer satisfying c+d.ltoreq.5, c=1 to 5 and d=0 to 4, and an electrophotographic photoreceptor the photosensitive layer of which contains the polycarbonate of the specific structure as a component. The electrophotographic photoreceptor is produced by using a coating liquid which contains the polycarbonate and does not get cloudy (gel), and is practically useful since it maintains excellent mechanical strength, such as high plate wear, and excellent electrophotographic properties for a long period.
摘要翻译:PCT No.PCT / JP93 / 00267 Sec。 371日期:1993年10月13日 102(e)1993年10月13日PCT 1993年3月3日PCT公布。 公开号WO93 / 18081 日期:1993年9月16日。聚碳酸酯和制备聚碳酸酯的方法,其包含由下列通式(I)表示的重复单元,其中R1和R2各自为卤素原子,烷基, 环烷基或芳基,a和b各自为0〜4的整数,X为单键,-O - , - CO - , - S - , - SO - , - SO 2 - , - CR 3 R 4 - (III),(IV)表示的端基,其中,R 1,R 2,R 3, R5为1〜30个碳原子的全氟烷基或取代全氟烷基,Y为-CH2-,e为0〜6的整数,Z为-O-,-CO-,-OCO-,-S-, - SO - , - SO 2 - 或-NHCO-,f为0或1,R6为卤素原子,烷基,环烷基或芳基,c和d分别为满足c + = 5,c = 1〜5,d = 0〜4,以及电子照相感光体,其感光层含有 具体结构的聚碳酸酯作为组分。 电子照相感光体通过使用含有聚碳酸酯的涂布液而不发生浑浊(凝胶)而制造,并且实际上是有用的,因为它保持了优异的机械强度,例如高的板磨损和长时间的优异的电子照相特性。
摘要:
Provided is an electrophotographic photosensitive body having a photosensitive layer on a conductive base, in which at least the outermost layer thereof contains particles having a double structure composed of a core member and a shell member having a lager rubber hardness than the core member. The electrophotographic photosensitive body has excellent mechanical strength such as wear resistance, abrasion resistance, and scratch resistance as well as excellent electrophotographic characteristics such as cleaning property for a long time period.