专利名称：Endless belt member, transfer unit
incorporating same, and image formingapparatus incorporating same
发明人：Sawai, Yuuji申请号：EP09166103.3申请日：20090722公开号：EP2148249A3公开日：20110316
专利附图：
摘要：A multi-layer endless belt member (201), which is applicable to a transfer unit(200) for use in an image forming apparatus (1), includes a base layer (201b, 201d, 201f,
201j) and a surface layer (201a, 201c, 201e, 201g, 201h) disposed on the base layer andhaving a higher resistivity and has a first resistivity of a first surface thereof and a secondresistivity of a second surface thereof opposite the first surface different from the firstresistivity. The second resistivity of the second surface ranges from 9.0 to 12.5 in acommon logarithm value (log[Ω/square]) when measured after 500V is applied for 10seconds. An amount of resistivity change in the first resistivity ranges from 0.5 to 1.5 afterapplication of 100V and is 0.2 or smaller after application of 500V. An amount ofresistivity change in the second resistivity is 0.1 or smaller after application of 100V and500V.
申请人：Ricoh Company, Ltd.
地址：3-6, Nakamagome 1-chome Ohta-ku Tokyo 143-8555 JP
国籍：JP
代理机构：Schwabe - Sandmair - Marx
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