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    • 1. 发明授权
    • Developing apparatus for improving the durability of the latent image
holding member
    • 用于提高潜像保持构件的耐久性的显影装置
    • US5548382A
    • 1996-08-20
    • US355983
    • 1994-12-14
    • Makoto KoshiYukio NishioKazunori Hirose
    • Makoto KoshiYukio NishioKazunori Hirose
    • G03G15/08
    • G03G15/0812G03G15/0818G03G15/0898
    • A developing device using a one-component developer composed of toner particles, which includes a vessel for holding the developer, and a developing roller rotatably provided within the vessel so that a portion of the roller is exposed therefrom and faces a surface of an electrostatic latent image carrying body to form a developing area. During rotation of the roller, the toner particles are entrained by a surface of the roller to form a developer layer therearound, and are carried to the developing area for a development of an electrostatic latent image formed on the latent image carrying body. The roller and the latent image carrying body are reversely rotated such that the surfaces thereof move upward at the developing area. A blade member is provided within the vessel and is resiliently engaged with the roller for regulating a thickness of the developer layer, and is disposed below the roller to prevent a leakage of the toner particles from the vessel at an underside of the developing roller. The roller has an open-cell foam structure such that pore openings or porous cells thereof have a diameter which is at most twice the average diameter of the toner particles. The roller preferably has an Asker C-hardness of at most 50.degree..
    • 使用包括用于保持显影剂的容器的由调色剂颗粒组成的单组分显影剂的显影装置和可旋转地设置在容器内的显影辊,使得辊的一部分从其暴露并面对静电潜在的表面 图像携带体形成发展中的区域。 在辊的旋转期间,调色剂颗粒被辊的表面夹带以在其周围形成显影剂层,并且被携带到显影区域以显影形成在潜像载体上的静电潜像。 辊和潜影携带体反转,使得其表面在显影区域向上移动。 叶片构件设置在容器内并且与辊弹性地接合以调节显影剂层的厚度,并且设置在辊的下方,以防止调色剂颗粒在显影辊的下侧从容器泄漏。 辊具有开孔泡沫结构,使得其开孔或多孔孔的直径为调色剂颗粒的平均直径的至多两倍。 辊优选具有至多50°的Asker C-硬度。