| 摘要 |
PURPOSE:To prevent contamination of both rollers and transfer guides and to prevent defective transfer by constituting the plural transfer guides for guiding the advance of a transfer material to a transfer section of members including conductive members and grounding the respective transfer guides via separate voltage generating elements. CONSTITUTION:The transfer guides 11a and transfer rollers 11b are made of the conductive material and are respectively connected to the earth via resistors 20a, 20b. Bias voltages of 200V and 80V are respectively generated by the resistors connected to these guides 11a and the generation of the defective transfer is substantially obviated. The paper rested at 25 deg.C and 60% RH generates about 200V voltage as about 10muA current flows into the transfer rollers 11b but since the paper has the relatively high resistance, just <=1muA current flows in the guides 11a and just <=20V voltage is generated in the guides 11a. Adhesion of a toner to the guides 11a is thus substantially prevented.
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