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    • 5. 发明授权
    • Image developer, process cartridge, and image forming apparatus
    • 图像显影剂,处理盒和成像装置
    • US08526864B2
    • 2013-09-03
    • US13071902
    • 2011-03-25
    • Shuuichi NakagawaChiyoshi NozakiHideaki YasunagaKeiichiro Juri
    • Shuuichi NakagawaChiyoshi NozakiHideaki YasunagaKeiichiro Juri
    • G03G15/08
    • G03G15/0808G03G2215/0634G03G2215/0869
    • An image developer, including a developer container containing a developer developing a latent image on a latent image bearer; a developer bearer bearing the developer, located close to or contacting the latent image bearer; and a developer feeding and collection roller feeding the developer onto the developer bearer and scraping the developer therefrom, rotating while contacting thereto with pressure, wherein the developer feeding and collection roller includes an inner layer formed of an electroconductive foamed rubber; and an outer layer formed of an insulative foamed rubber, and wherein the following relationship is satisfied: α≧T wherein α represents a compression amount of the pressure of the developer feeding and collection roller to the developer bearer; and T represents a thickness of the outer layer, and wherein an offset voltage having a polarity opposite to that of the charged developer is applied to the developer feeding and collection roller.
    • 一种图像显影剂,包括含有在潜像承载体上显影潜像的显影剂的显影剂容器; 承载显影剂的显影剂承载件位于靠近或接触潜影承载体的位置; 以及显影剂供给和收集辊,其将显影剂供给到显影剂承载体上并刮擦显影剂,同时与其接触压力旋转,其中显影剂供给和收集辊包括由导电泡沫橡胶形成的内层; 和由绝缘发泡橡胶形成的外层,并且其中满足以下关系:α> = T其中α表示显影剂供给和收集辊对显影剂载体的压力的压缩量; 并且T表示外层的厚度,并且其中具有极性与带电显影剂的极性相反的偏移电压被施加到显影剂供给和收集辊。