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    • 1. 发明授权
    • Apparatus for printing on opposite surfaces of a strip of printing paper
    • 用于打印印刷纸条的相对表面的装置
    • US5179417A
    • 1993-01-12
    • US868418
    • 1992-04-15
    • Tomio SugayaYasuyuki TsujiYasuo KikuchiKatsuhiro AkinagaMasaaki AkutsuMotoji Kurobane
    • Tomio SugayaYasuyuki TsujiYasuo KikuchiKatsuhiro AkinagaMasaaki AkutsuMotoji Kurobane
    • G03G15/00B41J3/60G03G15/20G03G15/23
    • B41J3/60G03G15/234G03G15/238G03G2215/00021G03G2215/00409G03G2215/00459
    • An apparatus for printing on opposite surfaces of a strip of printing paper using two electrophotographic printing units wherein each printing operation is of high quality and thermal damage to the printing is minimized. The apparatus includes a first electrophotographic printing unit for printing on the front surface of the printing paper, a buffer unit for temporarily holding the printing paper discharged outside of the first electrophotographic printing unit, a turn unit for turning over the printing paper, and a second electrophotographic printing unit for printing the reverse surface of the printing paper. A toner having a low melting temperature is employed for each of the first and second electrophotographic printing units so that developing treatment is conducted only with the aid of a heat roll but without any use of a preheating plate. A back-up roll adapted to cooperate with the heat roll is coated with a tetrafluoroethylene-based synthetic resin. The second electrophotographic printing unit is provided with a paper presser for squeezing the printing paper against a photosensitive drum only within the printing width range. A retract mechanism is operatively connected to the paper presser.
    • 使用两个电子照相印刷单元在一张打印纸的相对表面上打印的设备,其中每个打印操作具有高质量并且对打印的热损伤最小化。 该装置包括用于在打印纸的前表面上打印的第一电子照相印刷单元,用于临时保持排出第一电子照相印刷单元外部的打印纸的缓冲单元,用于翻转印刷纸的转动单元, 用于打印打印纸的背面的电子照相打印单元。 对于第一和第二电子照相印刷单元中的每一个都采用具有低熔点的调色剂,使得仅通过热辊而不使用预热板进行显影处理。 适用于与热辊配合的支撑辊涂覆有四氟乙烯基合成树脂。 第二电子照相印刷单元设置有仅在打印宽度范围内将打印纸压靠在感光鼓上的压纸器。 缩回机构可操作地连接到纸压脚。
    • 2. 发明授权
    • Method of preventing colors from being mixed for a two-color image
forming apparatus
    • 防止双色图像形成装置的颜色混合的方法
    • US5276487A
    • 1994-01-04
    • US875221
    • 1992-04-28
    • Katsuhiro AkinagaYasuo KikuchiTomio Sugaya
    • Katsuhiro AkinagaYasuo KikuchiTomio Sugaya
    • G03G15/01G03G13/01G03G15/08G03G13/08
    • G03G13/013
    • A method of preventing colors from being mixed in a two-color image forming apparatus. The surface of a photoreceptor is uniformly charged. A first latent electrostatic image formed on the photoreceptor surface is developed with a one-component developer so as to form a first toner image. A second latent electrostatic image formed on the photoreceptor surface is developed with a two-component developer so as to form a second toner image. The first and second toner images are simultaneously transferred onto a recording medium. In a preferred embodiment, the one-component developer is a magnetic toner, while the two-component developer is the combination of a nonmagnetic toner and a magnetic carrier. The magnetic toner and the magnetic carrier are preferably powder made of substantially the same materials.
    • 防止在双色图像形成装置中混合颜色的方法。 感光体的表面均匀带电。 形成在感光体表面上的第一静电潜像用单组分显影剂显影以形成第一调色剂图像。 形成在感光体表面上的第二静电潜像用双组分显影剂显影以形成第二调色剂图像。 第一和第二调色剂图像同时转印到记录介质上。 在优选的实施方案中,单组分显影剂是磁性调色剂,而双组分显影剂是非磁性调色剂和磁性载体的组合。 磁性调色剂和磁性载体优选是由基本上相同的材料制成的粉末。
    • 5. 发明授权
    • Developing apparatus for an electrophotographic machine
    • 电子照相机的显影装置
    • US5574546A
    • 1996-11-12
    • US504314
    • 1995-07-20
    • Takao KumasakaYasuo TakumaTatsuo IgawaTomio SugayaYasuo Kikuchi
    • Takao KumasakaYasuo TakumaTatsuo IgawaTomio SugayaYasuo Kikuchi
    • G03G15/01G03G15/08G03G15/09G03G15/00
    • G03G15/0921G03G2215/017G03G2215/018G03G2215/0602G03G2215/0634
    • A developing apparatus in which a stationary multipole permanent magnet is placed in a sleeve and in which development is performed by bringing a developer, which contains at least carrier and toner particles and is held on the periphery of a sleeve by use of the magnetic force of the multipole permanent magnet, into contact with a photo-conductive body owing to the rotation of the sleeve. For securing image density and for preventing the deposition of carrier onto the photo-conductive body, two magnetic pieces, each of which is arranged lengthwise in the direction of the axis thereof and which have the same polarity, are placed in a region in the multipole permanent magnet which faces the photo-conductive body in such a manner as to adjoin in the circumferential direction of said permanent magnet. This results in generation of the distribution of a magnetic field which has two peaks of magnetic force. The position at which the second one of the two peaks of the magnetic force is formed, downstream in the direction of rotation of the sleeve, is set at the nearest point between the photo-conductive body and the sleeve. Thereby, even when development is performed by bringing the developer into light contact with the photo-conductive body, the image density can be secured. Further, the carrier can be prevented from depositing on the photo-conductive body.
    • 一种显影装置,其中固定的多极永磁体被放置在套筒中,并且通过使至少包含载体和调色剂颗粒并且通过使用包含至少载体和调色剂颗粒的显影剂被保持在套筒的周边上的显影剂 多极永磁体由于套筒的旋转而与光导体接触。 为了确保图像浓度并且防止载体沉积到光导体上,将两个磁性片放置在多极中的一个区域中,每个磁性片沿其轴线方向纵向排列并且具有相同的极性 永磁体以与所述永磁体的圆周方向相邻的方式面对光导体。 这导致产生具有两个磁力峰的磁场的分布。 形成磁力的两个峰值中的第二个峰的位置在套筒的旋转方向的下游位于光导体和套筒之间的最近点处。 因此,即使通过使显影剂与光导体体接触而进行显影,也可以确保图像浓度。 此外,可以防止载体沉积在光导体上。
    • 10. 发明授权
    • Electrophotographic recording apparatus having a plurality of developing
devices which can be changed over
    • 具有可以切换的多个显影装置的电子照相记录装置
    • US5307147A
    • 1994-04-26
    • US945190
    • 1992-09-15
    • Takao KumasakaYuzuru SimazakiKunio SatohTomio SugayaYouji Hirose
    • Takao KumasakaYuzuru SimazakiKunio SatohTomio SugayaYouji Hirose
    • G03G15/01G03G21/00
    • G03G15/0126
    • An electrophotographic recording apparatus is provided having a reduced overall size. The space around a photosensitive member required for the developing unit to be located is minimized, more particularly, it i minimized in the lengthwise directional space. In the electrophotographic recording apparatus having a photosensitive member which moves at a predetermined speed; an exposure device for exposing the photosensitive member; a developing unit for developing an electrostatic latent image obtained by the exposure; and a transferring device for transferring a developed visible image to a recording paper sheet or the like, the developing unit is composed of developing devices, a plurality of supporting members for supporting the developing devices and an element for rotating the supporting members. The supporting members can be rotated while making a portion adjacent to a widthwise directional end of the photosensitive member to be a supporting point in a range from a state where the surface of the photosensitive member and the surface of a developing roll of each developing device run parallel to each other to a state where they are positioned substantially perpendicular to each other.
    • 提供具有减小的总体尺寸的电子照相记录装置。 显影单元所需的感​​光构件周围的空间被最小化,更特别地,其在纵向方向空间中被最小化。 在具有以预定速度移动的感光构件的电子照相记录装置中; 用于曝光感光构件的曝光装置; 用于显影通过曝光获得的静电潜像的显影单元; 以及用于将显影的可见图像转印到记录纸张等的转印装置,显影单元由显影装置,用于支撑显影装置的多个支撑构件和用于旋转支撑构件的元件组成。 支撑构件可以在使感光构件的宽度方向端部附近的部分成为支撑点的同时旋转,其范围从感光构件的表面和每个显影装置的显影辊的表面运行的状态 彼此平行地放置到彼此基本垂直的位置的状态。