JP6572519B2 - 透磁率検知器、現像装置及び画像形成装置 - Google Patents

透磁率検知器、現像装置及び画像形成装置 Download PDF

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Publication number
JP6572519B2
JP6572519B2 JP2014072830A JP2014072830A JP6572519B2 JP 6572519 B2 JP6572519 B2 JP 6572519B2 JP 2014072830 A JP2014072830 A JP 2014072830A JP 2014072830 A JP2014072830 A JP 2014072830A JP 6572519 B2 JP6572519 B2 JP 6572519B2
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magnetic permeability
coil
permeability detector
resistance
planar
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JP2014072830A
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Japanese (ja)
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JP2014224805A (ja
Inventor
廣田　哲郎
哲郎 廣田
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Ricoh Co Ltd
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Ricoh Co Ltd
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Priority to JP2014072830A priority Critical patent/JP6572519B2/ja
Priority to US14/256,141 priority patent/US9170233B2/en
Priority to CN201410163099.7A priority patent/CN104122767B/zh
Priority to EP14165558.9A priority patent/EP2813898B1/en
Publication of JP2014224805A publication Critical patent/JP2014224805A/ja
Priority to US14/886,986 priority patent/US9507290B2/en
Priority to US14/887,025 priority patent/US9507291B2/en
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Publication of JP6572519B2 publication Critical patent/JP6572519B2/ja
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  • Measuring Magnetic Variables (AREA)
  • Dry Development In Electrophotography (AREA)
JP2014072830A 2013-04-23 2014-03-31 透磁率検知器、現像装置及び画像形成装置 Active JP6572519B2 (ja)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP2014072830A JP6572519B2 (ja) 2013-04-23 2014-03-31 透磁率検知器、現像装置及び画像形成装置
US14/256,141 US9170233B2 (en) 2013-04-23 2014-04-18 Magnetic permeability detector, developing device, image forming apparatus, and oscillation signal frequency calculation method therefor
CN201410163099.7A CN104122767B (zh) 2013-04-23 2014-04-22 磁导率检测器、显影装置、图像形成装置、频率计算方法
EP14165558.9A EP2813898B1 (en) 2013-04-23 2014-04-23 Magnetic permeability detector, developing device, image forming apparatus, and oscillation signal frequency calculation method therefor
US14/886,986 US9507290B2 (en) 2013-04-23 2015-10-19 Magnetic permeability detector, developing device, image forming apparatus, and oscillation signal frequency calculation method therefor
US14/887,025 US9507291B2 (en) 2013-04-23 2015-10-19 Magnetic permeability detector, developing device, image forming apparatus, and oscillation signal frequency calculation method therefor

Applications Claiming Priority (3)

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JP2013090443 2013-04-23
JP2013090443 2013-04-23
JP2014072830A JP6572519B2 (ja) 2013-04-23 2014-03-31 透磁率検知器、現像装置及び画像形成装置

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JP2019104509A Division JP2019194599A (ja) 2013-04-23 2019-06-04 透磁率検知器、現像装置及び画像形成装置

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JP2014224805A JP2014224805A (ja) 2014-12-04
JP6572519B2 true JP6572519B2 (ja) 2019-09-11

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JP2019104509A Pending JP2019194599A (ja) 2013-04-23 2019-06-04 透磁率検知器、現像装置及び画像形成装置

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Publication number Priority date Publication date Assignee Title
JP6562295B2 (ja) 2015-06-24 2019-08-21 株式会社リコー 現像装置、画像形成装置およびプロセスカートリッジ

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4839602A (en) * 1986-11-04 1989-06-13 Philip Morris Incorporated Means for detecting metal in a stream of particulate matter
JPH0676961U (ja) * 1993-04-01 1994-10-28 コニカ株式会社 画像形成装置のトナー濃度検出装置
JPH07248676A (ja) * 1994-03-09 1995-09-26 Konica Corp トナー濃度検出装置
JPH08271481A (ja) * 1995-03-28 1996-10-18 Konica Corp トナー濃度センサ
JPH11223620A (ja) * 1998-02-06 1999-08-17 Konica Corp トナー濃度検出装置及びトナー濃度検出装置の製造方法
JP4286977B2 (ja) * 1999-07-02 2009-07-01 大日本印刷株式会社 非接触型ｉｃカードとそのアンテナ特性調整方法
JP2001242260A (ja) * 2000-02-29 2001-09-07 Matsushita Electric Works Ltd 金属体検出装置
JP2006086211A (ja) * 2004-09-14 2006-03-30 Denso Corp 半導体装置
JP4836070B2 (ja) * 2005-11-21 2011-12-14 独立行政法人日本原子力研究開発機構 高耐久型高抵抗器
JP4872977B2 (ja) * 2008-07-16 2012-02-08 コニカミノルタビジネステクノロジーズ株式会社 現像装置および画像形成装置
JP5267054B2 (ja) * 2008-10-31 2013-08-21 株式会社Ｉｈｉ 可変無誘導抵抗器
JP2010118430A (ja) * 2008-11-12 2010-05-27 Taiyosha Electric Co Ltd チップ抵抗器

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JP2019194599A (ja) 2019-11-07

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