JPH0339754U - - Google Patents

Info

Publication number
JPH0339754U
JPH0339754U JP1989099535U JP9953589U JPH0339754U JP H0339754 U JPH0339754 U JP H0339754U JP 1989099535 U JP1989099535 U JP 1989099535U JP 9953589 U JP9953589 U JP 9953589U JP H0339754 U JPH0339754 U JP H0339754U
Authority
JP
Japan
Prior art keywords
rotating sleeve
magnetic
magnetic poles
developer
permanent magnet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP1989099535U
Other languages
English (en)
Other versions
JP2522155Y2 (ja
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP1989099535U priority Critical patent/JP2522155Y2/ja
Priority to US07/570,330 priority patent/US5052336A/en
Publication of JPH0339754U publication Critical patent/JPH0339754U/ja
Application granted granted Critical
Publication of JP2522155Y2 publication Critical patent/JP2522155Y2/ja
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
    • G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
    • G03G15/09—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer using magnetic brush
    • G03G15/0921—Details concerning the magnetic brush roller structure, e.g. magnet configuration
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
    • G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
    • G03G15/09—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer using magnetic brush

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Magnetic Brush Developing In Electrophotography (AREA)
  • Dry Development In Electrophotography (AREA)

Description

【図面の簡単な説明】
第１図はこの考案による現像ローラの一実施例
を示す構成図、第２図及び第３図は同じくその他
の実施例を示す側面図、第４図は同じく３連の現
像ローラの構成例を示す側面図、第５図はこの考
案を実施する複写機の一例を示す全体構成図、第
６図は現像ユニツトの従来例を示す斜視図である
。 １……複写機本体、５……感光体ベルト、８…
…現像ユニツト、２０……現像ローラ、２１……
回転スリーブ、２２……固定支持部材、２３……
搬送磁極、２４……搬送制限磁極、２５……現像
磁極、２６……回収磁極、２３Ｍ，２４Ｍ，２５
Ｍ，２６Ｍ……永久磁石。

Claims (1)

  1. 【実用新案登録請求の範囲】 現像剤を搬送する非磁性体の回転スリーブと、
    それぞれその回転スリーブ内に設けられ、回転ス
    リーブを透してその外側に磁界を形成する複数個
    の磁極と、それらの磁極に磁力を供給する永久磁
    石と、その永久磁石と前記複数個の磁極とを支持
    する固定支持部材とからなり、電子写真方式によ
    る画像形成装置の現像ユニツトを構成する現像ロ
    ーラーにおいて、 前記複数個の磁極のうち、前記現像剤の移動の
    最下流部であつてその現像剤を前記現像ユニツト
    内に回収するための回収磁極の前記回転スリーブ
    の回転軸方向の長さを、他の磁極の長さよりも長
    く設定したことを特徴とする現像ローラ。
JP1989099535U 1989-08-26 1989-08-26 画像形成装置 Expired - Fee Related JP2522155Y2 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP1989099535U JP2522155Y2 (ja) 1989-08-26 1989-08-26 画像形成装置
US07/570,330 US5052336A (en) 1989-08-26 1990-08-21 Developing roller for a developing unit with transport, develop and collect magnets

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1989099535U JP2522155Y2 (ja) 1989-08-26 1989-08-26 画像形成装置

Publications (2)

Publication Number Publication Date
JPH0339754U true JPH0339754U (ja) 1991-04-17
JP2522155Y2 JP2522155Y2 (ja) 1997-01-08

Family

ID=14249900

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1989099535U Expired - Fee Related JP2522155Y2 (ja) 1989-08-26 1989-08-26 画像形成装置

Country Status (2)

Country Link
US (1) US5052336A (ja)
JP (1) JP2522155Y2 (ja)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5280323A (en) * 1991-09-10 1994-01-18 Xerox Corporation Development apparatus employing magnetic field shapers
US5283616A (en) * 1991-12-19 1994-02-01 Canon Kabushiki Kaisha Developing device having bearing for supporting a developing roller
US6576177B2 (en) 1997-12-29 2003-06-10 Ricoh Company, Ltd. System and method for molding a plastic gear suppressing shrinkage
JP2002193497A (ja) 2000-10-20 2002-07-10 Ricoh Co Ltd 給紙装置及びその給紙装置を備えた画像形成装置
US6695502B2 (en) * 2001-08-08 2004-02-24 Heidelberger Druckmaschinen Ag Method for reducing rub-off from a toner image using a phase change composition on the non-image side of a substrate
DE60211446T2 (de) 2001-10-26 2007-05-03 Ricoh Co., Ltd. Verfahren und Vorrichtung zum Zuführen von Bogen zur Unterdrückung von schlagenden Geräuschen
CN1206113C (zh) * 2002-04-17 2005-06-15 株式会社理光 纸输送装置及设有该纸输送装置的图像形成装置
JP4076427B2 (ja) * 2002-10-30 2008-04-16 株式会社リコー 画像形成装置
JP3548564B2 (ja) * 2002-11-08 2004-07-28 キヤノン株式会社 現像ローラー組立方法
US7016629B2 (en) * 2003-04-17 2006-03-21 Ricoh Company, Ltd. Image forming apparatus with discharging unit of increased capacity
EP1482385A3 (en) * 2003-05-20 2005-04-06 Ricoh Company, Ltd. Image forming apparatus
JP4444719B2 (ja) * 2003-07-07 2010-03-31 株式会社リコー 画像形成装置
JP4417788B2 (ja) * 2004-06-18 2010-02-17 株式会社リコー 画像形成措置
JP4608310B2 (ja) * 2004-12-27 2011-01-12 京セラミタ株式会社 現像装置およびこれを備えた画像形成装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55142372A (en) * 1979-04-23 1980-11-06 Canon Inc Developer scatter preventive device
JPS6195369A (ja) * 1984-10-17 1986-05-14 Ricoh Co Ltd 画像形成装置の現像装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3626898A (en) * 1970-02-06 1971-12-14 Addressograph Multigraph High-speed magnetic brush developer apparatus
NL7405393A (ja) * 1973-04-26 1974-06-25
US3977361A (en) * 1975-05-13 1976-08-31 Fuji Xerox Co., Ltd. Magnetic brush developing device
US4679527A (en) * 1985-12-27 1987-07-14 International Business Machines Corporation Magnetic brush developer
GB2201360B (en) * 1987-01-30 1990-11-21 Xerox Corp Cylindrical magnets

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55142372A (en) * 1979-04-23 1980-11-06 Canon Inc Developer scatter preventive device
JPS6195369A (ja) * 1984-10-17 1986-05-14 Ricoh Co Ltd 画像形成装置の現像装置

Also Published As

Publication number Publication date
JP2522155Y2 (ja) 1997-01-08
US5052336A (en) 1991-10-01

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees