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US07636539B2 Tandem intermediate-transfer type image forming apparatus 有权
串联转印型成像装置

Tandem intermediate-transfer type image forming apparatus
摘要:
An image forming unit includes four photoconductors, a belt extended around a driving roller and an extension-cum-primary transfer roller. Three primary transfer rollers sandwich the belt in association with a corresponding photoconductor. The extension-cum-primary transfer roller serves both as an extension roller and a primary transfer roller.
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