Image forming apparatus with dual image forming speeds

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United States of America Patent

PATENT NO 9063467
APP PUB NO 20120155900A1
SERIAL NO

13304914

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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An image forming apparatus includes an image bearing member, a developer bearing member bearing and conveying a developer to a development position facing the image bearing member, a first chamber, disposed so as to face the developer bearing member, from which the developer is supplied to the developer bearing member, and a second chamber, disposed so as to face the developer bearing member, in which the developer after development in the developer bearing member is collected. In addition, a conveying member is rotatably disposed in the first and second chambers and conveys developer in the first and second chambers for circulating developer between the first and second chambers, and an executing portion executes a first mode in which image formation is performed at a first image forming speed and a second mode in which image formation is performed at a second image forming speed lower than the first image forming speed. A controlling portion, in a case of switching to the second mode after the first mode is performed, controls a target driving speed of the conveying member during a predetermined period to rise temporally at a beginning of the second mode higher than after the predetermined period.

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First Claim

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Patent Owner(s)

  • CANON KABUSHIKI KAISHA

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Suzuki, Hideaki Tokyo, JP 289 4066

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