IMAGE FORMING APPARATUS AND WASTE TONER COLLECTING METHOD
PROBLEM TO BE SOLVED: To provide an image forming apparatus improved to lessen the discharge of waste toner to the outside by collecting the waste toner to the inside of the apparatus, and a waste toner collecting method. SOLUTION: In the tandem type image forming apparatus, the waste toner stuck to...
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Main Author | |
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Format | Patent |
Language | English |
Published |
14.06.2007
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Subjects | |
Online Access | Get full text |
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Summary: | PROBLEM TO BE SOLVED: To provide an image forming apparatus improved to lessen the discharge of waste toner to the outside by collecting the waste toner to the inside of the apparatus, and a waste toner collecting method. SOLUTION: In the tandem type image forming apparatus, the waste toner stuck to an intermediate transfer belt 50 is collected by a cleaning brush 1. Alternating voltage having a different absolute value is intermittently applied to the cleaning brush 1 so as to discharge the waste toner to the intermediate transfer belt 50. The waste toner is collected by a photoreceptor (image carrier) 41K in a K (black) image forming station, its polarity is made uniform by electrifying the image carrier 41K again, and then the waste toner is collected to a developing device 44K and stored in a toner tank or the like. Bias voltage of Y, M and C primary transfer rollers 45 (Y, M and C) is controlled so that the waste toner on the intermediate transfer belt 50 may not adhere to the Y, M and C image carriers. COPYRIGHT: (C)2007,JPO&INPIT |
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Bibliography: | Application Number: JP20050344989 |