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    • 3. 发明授权
    • Electrophotographic copying process
    • 电子照相复印工艺
    • US4565436A
    • 1986-01-21
    • US549314
    • 1983-11-07
    • Takao OkadaAkitoshi TodaYoshiyuki Mimura
    • Takao OkadaAkitoshi TodaYoshiyuki Mimura
    • G03G15/05G03G13/056G03G15/22
    • G03G13/056
    • An electrophotographic process and apparatus for performing the process which employs an electrophotographic photosensitive member of a basic construction in which a photoconductive layer and a transparent insulator layer are sequentially laminated on the surface of a conductive supporter. The process comprises a first step of providing a primary charge uniformly from the surface side of the transparent insulator layer, a second step of performing a secondary corona charging during an imagewise exposure by applying a square wave voltage whose voltage-time integration value of a polarity reverse to the primary charge is larger than that of the same polarity thereas and a third step of forming an electrostatic latent image on the surface of the transparent insulator layer by applying a uniform exposure.
    • 一种用于执行该方法的电子照相方法和装置,其采用基本结构的电子照相感光构件,其中光电导层和透明绝缘体层依次层压在导电支撑体的表面上。 该方法包括从透明绝缘体层的表面侧均匀地提供初级电荷的第一步骤;第二步骤,通过施加方波电压在成像曝光期间进行二次电晕充电,该方波电压的极性的电压 - 时间积分值 与主要电荷相反的电荷大于其相同极性的电荷,以及通过均匀曝光在透明绝缘体层的表面上形成静电潜像的第三步骤。
    • 5. 发明授权
    • Electrophotographic process with a.c. charger producing greater positive
charge
    • 电子照相过程与a.c. 充电器产生更大的正电荷
    • US4526848A
    • 1985-07-02
    • US549069
    • 1983-11-07
    • Takao OkadaAkitoshi TodaYoshiyuki Mimura
    • Takao OkadaAkitoshi TodaYoshiyuki Mimura
    • G03G15/05G03G13/056G03G15/056G03G13/052G03G13/24
    • G03G15/056G03G13/056Y10S430/102
    • An electrophotographic process employs an electrophotographic photosensitive member of a basic construction in which a photoconductive layer and a transparent insulator layer are sequentially laminated on the surface of a conductive supporter. The process in one preferred embodiment comprises a first step of providing a primary charge uniformly from the surface side of the transparent insulator layer, a second step of performing a secondary corona charging during an imagewise exposure by applying an a.c. voltage in which the firing angle of a negative half wave is controlled in phase to be within a phase angle corresponding to a lower voltage than the firing angle so that the positive discharge period may be longer than the negative one during one period, and a third step of forming an electrostatic latent image on the transparent insulator layer by applying a uniform exposure.
    • 电子照相方法使用基本结构的电子照相感光构件,其中光导电层和透明绝缘体层依次层压在导电支撑体的表面上。 一个优选实施方案中的方法包括从透明绝缘体层的表面侧均匀提供初级电荷的第一步骤,在成像曝光期间通过施加直流电流进行二次电晕充电的第二步骤。 将负半波的触发角相位控制在与触发角以下的电压相对应的相位角内的电压,使得在一个周期期间正放电周期可能比负值长, 通过均匀曝光在透明绝缘体层上形成静电潜像的步骤。