PAPER CONVEYANCE DEVICE
PROBLEM TO BE SOLVED: To prevent an auxiliary conveyance member from being charged and improve the quality of a picture image which is output by providing a conveyance belt with the electricity conducting property and grounding at least one of rolls which support the electricity conducting conveyanc...
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Format: | Patent |
Sprache: | eng |
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Zusammenfassung: | PROBLEM TO BE SOLVED: To prevent an auxiliary conveyance member from being charged and improve the quality of a picture image which is output by providing a conveyance belt with the electricity conducting property and grounding at least one of rolls which support the electricity conducting conveyance belt. SOLUTION: Static electricity is generated due to friction of a star wheel 21 and a conveyance belt 13 or paper, and the star wheel 21 is charged with electricity. Since resistance rate of the conveyance belt 13 is 10 Ω.cm or less, the conveyance belt 13 is provided with the electricity conducting property, and moreover, either of rolls 11, 12 is grounded electrically, charges of the star wheel 21 are discharged in a path of the conveyance belt 13, the rolls 11, 12, and the grounding. Consequently, an electric potential of the star wheel 21 is maintained at a voltage close to a grounding potential, for example, -200V or less, irrespective of external environment so that toner on paper is not attracted by the star wheel 21. For this reason, toner does not move again on the paper which follows from the star wheel 21 to prevent the paper from becoming dirty. |
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