发明名称 Image forming apparatus
摘要 The present invention provides an image forming apparatus comprising a first developing device for developing a first latent image to form a first toner image, a second developing device for acting on an image bearing member on which the first toner is formed to develop a second latent image thereby creating a second toner image, and an antioxidant material layer provided on a surface of a developing sleeve of the second developing device.
申请公布号 US5032852(A) 申请公布日期 1991.07.16
申请号 US19900469162 申请日期 1990.01.24
申请人 CANON KABUSHIKI KAISHA 发明人 FUJII, HARUO;KOBAYASHI, TATSUYA;KATO, JUNICHI
分类号 G03G15/01;G03G15/09 主分类号 G03G15/01
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