IMAGE FORMING APPARATUS

IMAGE FORMING APPARATUS

PROBLEM TO BE SOLVED: To provide an image forming apparatus capable of stably performing efficient secondary transfer without causing image quality degradation such as void during the secondary transfer regardless of a difference in the contents of images to be formed and without causing degradation...

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Hauptverfasser: GOTO HIROBUMI, NAKAO YOSHIAKI
Format: Patent
Sprache:eng
Schlagworte:
CINEMATOGRAPHY
ELECTROGRAPHY
ELECTROPHOTOGRAPHY
HOLOGRAPHY
MAGNETOGRAPHY
PHOTOGRAPHY
PHYSICS
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creator GOTO HIROBUMI
NAKAO YOSHIAKI
description PROBLEM TO BE SOLVED: To provide an image forming apparatus capable of stably performing efficient secondary transfer without causing image quality degradation such as void during the secondary transfer regardless of a difference in the contents of images to be formed and without causing degradation in efficiency in secondary transfer of black toner, etc., and scattering of toner and so on during the secondary transfer. SOLUTION: The image forming apparatus is provided with a control means that makes a correction by multiplying the value of a secondary transfer bias by a correction factor corresponding to the maximum dot area proportion. In addition, the apparatus is provided with a control means for adjusting an amount of toner in a specific color that composes a multi-color toner image, such that the surface potential (Vpk) of a triple black (PK) toner image and the surface potential (Vk) of a reference toner image composed of 100% of dot area proportion have the relation of Vpk≤3.8×Vk. Further, the image forming apparatus includes a control means that performs these two control operations in combination. COPYRIGHT: (C)2006,JPO&NCIPI
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SOLUTION: The image forming apparatus is provided with a control means that makes a correction by multiplying the value of a secondary transfer bias by a correction factor corresponding to the maximum dot area proportion. In addition, the apparatus is provided with a control means for adjusting an amount of toner in a specific color that composes a multi-color toner image, such that the surface potential (Vpk) of a triple black (PK) toner image and the surface potential (Vk) of a reference toner image composed of 100% of dot area proportion have the relation of Vpk≤3.8×Vk. Further, the image forming apparatus includes a control means that performs these two control operations in combination. 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SOLUTION: The image forming apparatus is provided with a control means that makes a correction by multiplying the value of a secondary transfer bias by a correction factor corresponding to the maximum dot area proportion. In addition, the apparatus is provided with a control means for adjusting an amount of toner in a specific color that composes a multi-color toner image, such that the surface potential (Vpk) of a triple black (PK) toner image and the surface potential (Vk) of a reference toner image composed of 100% of dot area proportion have the relation of Vpk≤3.8×Vk. Further, the image forming apparatus includes a control means that performs these two control operations in combination. 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subjects CINEMATOGRAPHY
ELECTROGRAPHY
ELECTROPHOTOGRAPHY
HOLOGRAPHY
MAGNETOGRAPHY
PHOTOGRAPHY
PHYSICS
title IMAGE FORMING APPARATUS
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