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    • 28. 发明授权
    • Electrophotographic developing method using magnetic toners
    • 使用磁性调色剂的电子照相显影方法
    • US4433042A
    • 1984-02-21
    • US327197
    • 1981-12-03
    • Tsuneaki KawanishiAkio MukohHirosada MorishitaNobuyoshi Hoshi
    • Tsuneaki KawanishiAkio MukohHirosada MorishitaNobuyoshi Hoshi
    • G03G9/08G03G9/083G03G13/09G03G13/22
    • G03G13/22G03G9/0823G03G9/083
    • Electrophotographic copying is carried out by electrostatically forming a latent image on a recording medium, supplying a magnetic toner of single component system containing at least a resin and fine particles of forromagnetic material on a non-magnetic sleeve provided with a permanent magnet roller having a plurality of magnetic poles therein, transporting the magnetic toner into a gap between the recording medium and the non-magnetic sleeve, attaching the magnetic toner to the recording medium, thereby developing the latent image into a visible image, electrostatically transferring the toner image thus formed on the recording medium onto a transfer sheet, and fixing the transferred image, thereby obtaining a final image, wherein the magnetic toner has a resistivity of more than 5.times.10.sup.15 .OMEGA.cm and a relative dielectric constant of less than 3.0.Good development and good transferred image are obtained even with a recording medium having a low relative dielectric constant and a high insulating property, and practically high transfer efficiency can be obtained with the ordinary sheet having a low resistivity as a transfer sheet.
    • 通过在记录介质上静电形成潜像来进行电子照相复印,将含有至少一种树脂的单组分体系的磁性调色剂和非磁性的细小颗粒供给到具有多个 将磁性调色剂输送到记录介质和非磁性套筒之间的间隙中,将磁性调色剂附着到记录介质上,从而将潜像显影成可见图像,将如此形成的调色剂图像静电转印到 将记录介质转印到转印纸上,并固定转印图像,从而获得最终图像,其中磁性调色剂的电阻率大于5×10 15欧姆·厘米,相对介电常数小于3.0。 即使使用具有低相对介电常数和高绝缘性的记录介质,也能获得良好的显影和良好的转印图像,并且通过具有低电阻率的普通片作为转印片可以获得实际上高的转印效率。