IMAGE FORMING APPARATUS

To prevent the occurrence of a dust-like abnormal image even when a sheet with a small thickness is fed.SOLUTION: An image forming apparatus comprises: a conveyance belt 61 that conveys a sheet P between a transfer nip N1 and a fixing nip N2; a motor Mt3 (driving means) that drives the conveyance be...

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Main Authors HONJO KENJI, NAGATA ATSUSHI, NAGATA HARUKI, HASEGAWA AKIRA
Format Patent
LanguageEnglish
Japanese
Published 07.03.2019
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Abstract To prevent the occurrence of a dust-like abnormal image even when a sheet with a small thickness is fed.SOLUTION: An image forming apparatus comprises: a conveyance belt 61 that conveys a sheet P between a transfer nip N1 and a fixing nip N2; a motor Mt3 (driving means) that drives the conveyance belt 61; and a paper thickness sensor 93 (thickness detection means) that detects the thickness of the sheet P conveyed by the conveyance belt 61. When the thickness detected by the paper thickness sensor 93 is small, a control unit 90 controls the motor Mt3 so as to reduce a velocity ratio A/B (=surface linear velocity A of conveyance belt 61/surface linear velocity B of transfer rotating body 70) compared with that when the thickness is large.SELECTED DRAWING: Figure 3 【課題】厚みが薄いシートが通紙されても、チリ状の異常画像が発生しないようにする。【解決手段】転写ニップN1と定着ニップN2との間でシートPを搬送する搬送ベルト61や、搬送ベルト61を駆動するモータMt3(駆動手段)や、搬送ベルト61によって搬送されるシートPの厚みを検知する紙厚センサ93(厚み検知手段)、が設置されている。そして、紙厚センサ93によって検知された厚みが薄い場合に、厚みが厚い場合に比べて、速度比A/B(=搬送ベルト61の表面線速度A/転写回転体70の表面線速度B)が小さくなるように、制御部90によってモータMt3を制御している。【選択図】図3
AbstractList To prevent the occurrence of a dust-like abnormal image even when a sheet with a small thickness is fed.SOLUTION: An image forming apparatus comprises: a conveyance belt 61 that conveys a sheet P between a transfer nip N1 and a fixing nip N2; a motor Mt3 (driving means) that drives the conveyance belt 61; and a paper thickness sensor 93 (thickness detection means) that detects the thickness of the sheet P conveyed by the conveyance belt 61. When the thickness detected by the paper thickness sensor 93 is small, a control unit 90 controls the motor Mt3 so as to reduce a velocity ratio A/B (=surface linear velocity A of conveyance belt 61/surface linear velocity B of transfer rotating body 70) compared with that when the thickness is large.SELECTED DRAWING: Figure 3 【課題】厚みが薄いシートが通紙されても、チリ状の異常画像が発生しないようにする。【解決手段】転写ニップN1と定着ニップN2との間でシートPを搬送する搬送ベルト61や、搬送ベルト61を駆動するモータMt3(駆動手段)や、搬送ベルト61によって搬送されるシートPの厚みを検知する紙厚センサ93(厚み検知手段)、が設置されている。そして、紙厚センサ93によって検知された厚みが薄い場合に、厚みが厚い場合に比べて、速度比A/B(=搬送ベルト61の表面線速度A/転写回転体70の表面線速度B)が小さくなるように、制御部90によってモータMt3を制御している。【選択図】図3
Author HASEGAWA AKIRA
NAGATA HARUKI
HONJO KENJI
NAGATA ATSUSHI
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Snippet To prevent the occurrence of a dust-like abnormal image even when a sheet with a small thickness is fed.SOLUTION: An image forming apparatus comprises: a...
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SubjectTerms CINEMATOGRAPHY
ELECTROGRAPHY
ELECTROPHOTOGRAPHY
HOLOGRAPHY
MAGNETOGRAPHY
PHOTOGRAPHY
PHYSICS
Title IMAGE FORMING APPARATUS
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