JP2000122400A - Developing device - Google Patents

Developing device

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Publication number
JP2000122400A
JP2000122400A JP30638398A JP30638398A JP2000122400A JP 2000122400 A JP2000122400 A JP 2000122400A JP 30638398 A JP30638398 A JP 30638398A JP 30638398 A JP30638398 A JP 30638398A JP 2000122400 A JP2000122400 A JP 2000122400A
Authority
JP
Japan
Prior art keywords
developer
toner
developing
fibers
contact
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
JP30638398A
Other languages
Japanese (ja)
Other versions
JP4006114B2 (en
Inventor
Takeshi Yamamoto
毅 山本
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Canon Inc
Original Assignee
Canon Inc
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 by Canon Inc filed Critical Canon Inc
Priority to JP30638398A priority Critical patent/JP4006114B2/en
Priority to US09/386,152 priority patent/US6278856B1/en
Publication of JP2000122400A publication Critical patent/JP2000122400A/en
Application granted granted Critical
Publication of JP4006114B2 publication Critical patent/JP4006114B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

PROBLEM TO BE SOLVED: To obtain a nonmagnetic one component developing device which drastically reduces the load on toner at the time of charge impartation and supply to a developing sleeve and is capable of executing a low-stress coating of the well electrostatically charged toners. SOLUTION: This developing device is constituted by arranging the developing sleeve 1 to a photosensitive drum 11 without contact, installing a rotating toner supply brush 4 without contact nearer to the upstream side in the rotating direction of the sleeve 1 from the opposite part (developing part) thereof and installing a toner flow passage control member 5 in contact with the brush nearer to the upstream side in the rotating direction of the brush 4 from the opposite part thereof. The device springs out the nonmagnetic toner deposited on the fibers of the brush by the contact with the control member 5 and forms the toner to be a cloud. Conductive fibers and insulative fibers are previously flocked at the supply brush 4 and the triboelectrostatic charge impartation to the toner is executed by the insulative fibers. An electric field is formed between the toners and the sleeve by the conductive fibers under the impressed voltage, by which the contactless supply of the toners of the sleeve is executed. Further, a recovering roller 8 is arranged on the downstream side in the rotating direction of the sleeve from the developing portion and the toners remaining after the development on the sleeve 1 are recovered without contact.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、電子写真装置およ
び静電記録装置等の画像形成装置に用いられる現像装置
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a developing device used for an image forming apparatus such as an electrophotographic apparatus and an electrostatic recording apparatus.

【０００２】[0002]

【従来の技術】従来、電子写真方式を利用した画像形成
装置においては、像担持体に静電潜像を形成し、これを
現像してトナー像として可視化し、そのトナー像を転写
材上に転写して画像を得ている。2. Description of the Related Art Conventionally, in an image forming apparatus using an electrophotographic system, an electrostatic latent image is formed on an image carrier, developed and visualized as a toner image, and the toner image is formed on a transfer material. The image is obtained by transferring.

【０００３】上記の現像方法としては、一般に、磁性ト
ナーのみからなる一成分現像剤を用いた一成分現像法
と、磁性粒子（磁性キャリア）と非磁性トナーからなる
二成分現像剤を用いた二成分現像法とがあるが、一成分
現像法の方が、現像装置の構成が簡単であり、メンテナ
ンスが容易である等のメリットがあるため、その現像装
置が種々提案され、また実用化されている。In general, the above-described developing methods include a one-component developing method using a one-component developer composed of only a magnetic toner and a two-component developing method using a two-component developer composed of magnetic particles (magnetic carrier) and a non-magnetic toner. There is a component developing method, but the one-component developing method has advantages such as a simpler configuration of the developing device and easy maintenance, so various developing devices have been proposed and put into practical use. I have.

【０００４】ところで、特開昭５８−１１６５５９で示
されるような、非磁性トナーのみからなる非磁性一成分
現像剤による現像法も提案されており、近年の画像のカ
ラー化に対応すべく、高品質なカラー画像を得ることが
可能な上、低コストでかつ小型の現像装置が実用化され
ている。A developing method using a non-magnetic one-component developer consisting only of a non-magnetic toner as disclosed in Japanese Patent Application Laid-Open No. 58-116559 has been proposed. A low-cost and small-sized developing device capable of obtaining a high-quality color image has been put to practical use.

【０００５】非磁性一成分現像装置の一例を図５に示
す。図５に示すように、現像装置は、非磁性一成分現像
剤の非磁性トナーを収容した現像容器３に、現像剤担持
体として矢印方向に回転される現像スリーブ１を設置
し、この現像スリーブ１に、現像剤供給部材としてのト
ナー供給ローラ１４、および現像剤規制部材としての規
制ブレード１３を当接設置している。FIG. 5 shows an example of a non-magnetic one-component developing apparatus. As shown in FIG. 5, the developing device includes a developing container 1 containing a non-magnetic toner of a non-magnetic one-component developer and a developing sleeve 1 which is rotated in the direction of an arrow as a developer carrier. 1, a toner supply roller 14 as a developer supply member and a regulating blade 13 as a developer regulating member are provided in contact with each other.

【０００６】トナー供給ローラ１４は、ＳＵＳ等の芯金
１４ａの外周面上にウレタンフォーム等の弾性部材１４
ｂを被覆して形成されており、現像スリーブ１と摺擦し
ながら回転して、現像容器３内に収容されている非磁性
トナーを現像スリーブ１の表面に供給するとともに、感
光ドラム１１と対向した現像部での現像に寄与せず、現
像スリーブ１の回転にともない現像容器３内に戻された
非磁性トナーを現像スリーブ１の表面から掻き落とす作
用を有する。The toner supply roller 14 has an elastic member 14 such as urethane foam on the outer peripheral surface of a core metal 14a such as SUS.
b and rotates while rubbing against the developing sleeve 1 to supply the non-magnetic toner contained in the developing container 3 to the surface of the developing sleeve 1 and to face the photosensitive drum 11. The non-magnetic toner which has not returned to the developing container 3 with the rotation of the developing sleeve 1 without contributing to the development in the developing section has been scraped off from the surface of the developing sleeve 1.

【０００７】規制ブレード１３は、リン青銅等からなる
支持部材１３ａの現像スリーブ１との対向面側に、ウレ
タンゴム等の弾性部材１３ｂが接着により設けられてお
り、弾性部材１３ｂで現像スリーブ１の表面に接触し
て、現像スリーブ１上に担持されたトナーを規制してト
ナーの薄層に形成するとともに、トナーに摩擦帯電電荷
を付与している。The regulating blade 13 has an elastic member 13b made of urethane rubber or the like provided by bonding on a surface of the supporting member 13a made of phosphor bronze or the like facing the developing sleeve 1, and the elastic member 13b forms the elastic member 13b. In contact with the surface, the toner carried on the developing sleeve 1 is regulated to form a thin layer of the toner, and a triboelectric charge is applied to the toner.

【０００８】現像装置は、以上の構成により、現像スリ
ーブ１上に帯電した非磁性トナーの薄層を良好に形成し
て、感光ドラム１１の表面に形成された静電潜像の現像
に供給することができ、潜像の良好な現像が可能となっ
た。With the above-described structure, the developing device favorably forms a thin layer of charged non-magnetic toner on the developing sleeve 1 and supplies it to the development of the electrostatic latent image formed on the surface of the photosensitive drum 11. As a result, favorable development of the latent image became possible.

【０００９】[0009]

【発明が解決しようとする課題】しかしながら、上記の
非磁性一成分現像装置では、トナーへの電荷付与が主に
規制ブレード１３によるトナー層厚規制時に行われてお
り、トナーが規制ブレード１３を通過する際の接触摩擦
により帯電がなされる。また供給ローラ１４を現像スリ
ーブ１に当接して、トナーを摺擦して現像スリーブ１に
供給しまた現像スリーブ１上のトナーを回収している。However, in the above-described non-magnetic one-component developing device, the charge is applied to the toner mainly when the toner layer thickness is regulated by the regulating blade 13, and the toner passes through the regulating blade 13. The charging is performed by the contact friction at the time of the charging. Further, the supply roller 14 is brought into contact with the developing sleeve 1 to rub and rub the toner to supply the developing sleeve 1 and collect the toner on the developing sleeve 1.

【００１０】このようなことから、非磁性一成分現像装
置では、現像容器３内でトナーに極めて大きな機械的負
荷がかかり、トナーのダメージは他の現像法に比べて非
常に大きい。For these reasons, in the non-magnetic one-component developing device, an extremely large mechanical load is applied to the toner in the developing container 3, and the damage of the toner is much larger than in other developing methods.

【００１１】さらに、トナー供給ローラ１４の配置位置
や回転方向によっては、現像に寄与しなかったトナーを
完全に回収することができないことがあり、現像スリー
ブ１上にトナーが残留することがあった。現像スリーブ
１上に残留したトナーは、再度規制ブレード１３を通過
して現像領域に搬送されることになるが、このような再
搬送が繰り返し行われると、トナーの帯電量や流動性を
制御している外添剤等が、その都度受ける機械的な軋轢
や熱の蓄積によりトナー内部に埋め込まれ、トナーが劣
化して所望の帯電特性や流動性を得られなくなる。Further, depending on the arrangement position and the rotation direction of the toner supply roller 14, the toner not contributing to the development may not be completely collected, and the toner may remain on the developing sleeve 1. . The toner remaining on the developing sleeve 1 is conveyed again to the developing area through the regulating blade 13, but if such re-conveying is repeated, the charge amount and fluidity of the toner are controlled. The external additives and the like are embedded in the toner due to mechanical friction and heat accumulation received each time, so that the toner is deteriorated and desired charging characteristics and fluidity cannot be obtained.

【００１２】このような劣化トナーは、画像形成プロセ
ス中に多くの問題を引き起こす。たとえば劣化トナーが
現像に使用された場合、適正な現像特性が得られないこ
とにより現像不良が発生したり、転写時に画像の中抜け
等を引き起こす場合がある。さらには現像スリーブ１へ
の新たなトナーの供給が阻害されて、現像スリーブ１上
へのトナーの塗布量が低下し、濃度不良を引き起こした
りする。また劣化トナーが規制ブレード１３の現像スリ
ーブ１とのニップ部や現像スリーブ１の表面に融着する
と、現像スリーブ１上にスジ等のトナーコート不良を発
生させるとともに、現像スリーブ１に新たに供給される
トナーへの電荷付与を阻害する。これにより、未帯電ト
ナーを現像領域に送り込むことになり、カブリ、ムラ等
の画像不良を生じさせることがある。[0012] Such deteriorated toner causes many problems during the image forming process. For example, when the deteriorated toner is used for development, an insufficient development characteristic may not be obtained, which may cause a development defect or may cause an image to be missing during transfer. Further, supply of new toner to the developing sleeve 1 is hindered, and the amount of toner applied to the developing sleeve 1 is reduced, thereby causing a density defect. Further, when the deteriorated toner is fused to the nip portion of the regulating blade 13 with the developing sleeve 1 or to the surface of the developing sleeve 1, toner coating defects such as streaks are generated on the developing sleeve 1, and newly supplied to the developing sleeve 1. The toner from being charged. As a result, the uncharged toner is sent to the developing area, which may cause image defects such as fog and unevenness.

【００１３】また非磁性一成分現像装置では、トナーに
かかる負担が大きいだけでなく、現像装置自体にかかる
負荷も大きい。たとえばトナー供給ローラ１４である
が、上記のようにスポンジ系のローラに構成されている
場合、現像スリーブ１に対する摺擦が長時間に及ぶと、
トナー供給ローラ１４自身の摩耗、損傷、トナーの目詰
まり等が発生し、良好なトナーの供給、回収が行えなく
なる。Further, in the non-magnetic one-component developing device, not only the load on the toner is large but also the load on the developing device itself is large. For example, the toner supply roller 14 is a sponge-type roller as described above.
Wear and damage of the toner supply roller 14 itself, clogging of the toner, and the like occur, and it becomes impossible to supply and collect the toner satisfactorily.

【００１４】このように非磁性一成分現像装置は、簡易
な構成でありながら良好な現像画像を得ることが可能で
ある一方、トナーおよび装置にかかる負荷が大きく、磁
性一成分現像装置や２成分現像装置に比べて、長期的な
安定性が乏しい。従って、トナーがなくなったら現像装
置を丸ごと交換するカートリッジタイプの現像装置で主
に利用されており、トナーを補給していくタイプの現像
装置にはあまり採用されていない。As described above, the non-magnetic one-component developing device can obtain a good developed image with a simple structure, but the load on the toner and the device is large, and the non-magnetic one-component developing device and the two-component developing device It has poor long-term stability as compared with the developing device. Therefore, it is mainly used in a cartridge-type developing device that replaces the entire developing device when the toner runs out, and is not often used in a developing device that replenishes toner.

【００１５】本発明の目的は、電荷付与および現像スリ
ーブへの供給の際のトナーへの負荷を顕著に低減して、
低ストレスコートを実現できるとともに、反転トナーや
未帯電トナーを含まないトナーのコートができ、トナー
補給タイプとしても長期間にわたり使用可能な非磁性一
成分現像装置を提供することである。SUMMARY OF THE INVENTION It is an object of the present invention to significantly reduce the load on a toner during charge supply and supply to a developing sleeve.
An object of the present invention is to provide a non-magnetic one-component developing device which can realize a low stress coating, can coat a toner not including a reversal toner or an uncharged toner, and can be used for a long time as a toner supply type.

【００１６】[0016]

【課題を解決するための手段】上記目的は、本発明にか
かる現像装置にて達成される。要約すれば、本発明は、
非磁性一成分現像剤を収容した現像容器と、前記現像容
器の開口部に像担持体と対向して回転自在に配置され、
供給された現像剤を担持して像担持体と対向した現像部
へ搬送する現像剤担持体と、前記現像部よりも現像剤担
持体の回転方向上流側に現像剤担持体に非接触でかつ回
転自在に配置され、現像剤を担持して現像剤担持体に供
給する現像剤供給部材と、現像剤担持体と現像剤供給部
材との対向部よりも現像剤供給部材の回転方向上流側
に、その一端を現像剤供給部材に接触して配置された現
像剤流路制御部材と、前記現像剤流路制御部材との対向
部よりも現像剤担持体の回転方向下流でかつ前記現像部
よりも現像剤担持体の回転方向上流側に、現像剤担持体
と接触して配置された現像剤規制部材と、前記現像部よ
りも現像剤担持体の回転方向下流側に現像剤担持体と非
接触に配置された現像剤回収部材と、前記現像剤担持体
および現像材供給部材のそれぞれに電圧を印加するそれ
ぞれの電源とを有し、前記現像剤供給部材が繊維を植毛
したブラシローラからなり、前記繊維が少なくとも２種
の繊維を混毛してなることを特徴とする現像装置であ
る。本発明によれば、前記２種の繊維が低抵抗の導電性
繊維と高抵抗の絶縁性繊維である。前記絶縁性繊維が前
記現像剤の帯電極性に対し逆の帯電極性を有し、前記現
像剤との接触時にこれに摩擦帯電電荷を付与する。The above object is achieved by a developing apparatus according to the present invention. In summary, the present invention provides:
A developing container containing a non-magnetic one-component developer, and rotatably disposed facing an image carrier at an opening of the developing container,
A developer carrier that carries the supplied developer and conveys the developer to a developing unit facing the image carrier; and a developer carrier that is not in contact with the developer carrier on the rotation direction upstream side of the developer carrier than the developing unit. A developer supply member that is rotatably arranged and carries the developer and supplies the developer to the developer carrier; and a rotation direction upstream of the developer supply member relative to an opposing portion between the developer carrier and the developer supply member. A developer flow path control member disposed at one end thereof in contact with the developer supply member, and a rotation direction downstream of the developer carrier from a portion facing the developer flow path control member and from the developing section. A developer regulating member disposed in contact with the developer carrier on the upstream side in the rotational direction of the developer carrier; and a developer carrier on the downstream side in the rotational direction of the developer carrier from the developing unit. A developer collection member disposed in contact with the developer carrier and the developer supply unit; A developing device having a power source for applying a voltage to each of the developing devices, wherein the developer supply member comprises a brush roller in which fibers are planted, and the fibers are obtained by mixing at least two kinds of fibers. It is. According to the present invention, the two kinds of fibers are a low-resistance conductive fiber and a high-resistance insulating fiber. The insulating fiber has a charge polarity opposite to the charge polarity of the developer, and imparts a triboelectric charge to the developer when it comes into contact with the developer.

【００１７】[0017]

【発明の実施の形態】以下、図面を参照して本発明の実
施例を詳細に説明する。Embodiments of the present invention will be described below in detail with reference to the drawings.

【００１８】実施例１ 図１は、本発明の現像装置の一実施例を示す断面図であ
る。Embodiment 1 FIG. 1 is a sectional view showing an embodiment of the developing device of the present invention.

【００１９】図１に示すように、本実施例の現像装置
は、一成分現像剤の非磁性トナーを収容した現像容器３
を有し、現像容器３の感光ドラム１１と対面した開口部
に、現像剤担持体として感光ドラム１１と所定間隙を開
けた現像スリーブ１を備え、現像スリーブ１は矢印方向
に回転する。現像スリーブ１には、電源２より直流電圧
と交流電圧とを重畳した現像バイアスが印加されるよう
になっている。As shown in FIG. 1, a developing device according to the present embodiment includes a developing container 3 containing a non-magnetic toner as a one-component developer.
The developing sleeve 1 is provided at an opening facing the photosensitive drum 11 of the developing container 3 and has a predetermined gap with the photosensitive drum 11 as a developer carrier, and the developing sleeve 1 rotates in the direction of the arrow. A developing bias in which a DC voltage and an AC voltage are superimposed is applied from a power supply 2 to the developing sleeve 1.

【００２０】この現像スリーブ１に対し、トナー供給ブ
ラシ４、トナー流露制御部材５およびトナー規制部材
（弾性ブレード）７が設置され、さらに、現像容器３の
開口部から見て現像スリーブ１の奥側にトナー回収ロー
ラ８が、その下方に撹拌部材１０が設置されている。ト
ナー回収ローラ８にはスクレーパ９が当接されている。A toner supply brush 4, a toner flow control member 5 and a toner regulating member (elastic blade) 7 are provided on the developing sleeve 1, and further, a rear side of the developing sleeve 1 when viewed from an opening of the developing container 3. And a stirring member 10 is provided below the toner collecting roller 8. A scraper 9 is in contact with the toner collecting roller 8.

【００２１】トナー供給ブラシ４は、現像容器３に収容
した非磁性トナーを現像スリーブ１に供給するためのも
ので、現像スリーブ１の略下部に、これと約１００μｍ
〜１ｍｍの距離をあけて配置され、現像スリーブ１の回
転方向と同方向（現像スリーブ１との最近接部で逆方向
に移動する向き）に回転可能に配設されている。トナー
供給ブラシ４の芯金にはバイアスを印加する電源６が接
続され、現像バイアスに直流電圧Ｖｆを重畳した所望の
電圧が印加される。The toner supply brush 4 is for supplying the non-magnetic toner contained in the developing container 3 to the developing sleeve 1.
The developing sleeve 1 is arranged at a distance of about 1 mm and is rotatable in the same direction as the rotation direction of the developing sleeve 1 (the direction in which the developing sleeve 1 moves in the opposite direction at the closest point to the developing sleeve 1). A power source 6 for applying a bias is connected to the core of the toner supply brush 4, and a desired voltage obtained by superimposing a DC voltage Vf on a developing bias is applied.

【００２２】本発明によれば、トナー供給ブラシ４は、
図２（ａ）、（ｂ）に示すように、体積抵抗１０2 〜１
０8 Ωｃｍの低抵抗の導電性繊維１２ａと、体積抵抗１
０8〜１０15 Ωｃｍの高抵抗の絶縁性繊維１２ｂの２
種類を混毛したブラシ部材１２を、ＳＵＳ等の芯金４ａ
に巻き付けたファーブラシ（ブラシローラ）からなって
いる。According to the present invention, the toner supply brush 4
As shown in FIGS. 2A and 2B, the volume resistances 10 2 to 10 2
0 8 and conductive fibers 12a of low resistance [Omega] cm, the volume resistivity 1
0 8-10 15 high resistance of the insulative fibers 12b of [Omega] cm 2
The brush member 12 of which the kinds of hairs are mixed is used as the core metal 4a such as SUS.
It consists of a fur brush (brush roller) wound around.

【００２３】本実施例では、非磁性トナーとして負極性
帯電のものを使用するので、絶縁性繊維１２ｂには、正
極性の帯電性を持つものが好ましく、ナイロン繊維（た
だし、体積抵抗１０8 〜１０15Ωｃｍのもの）を使用し
た。しかし、絶縁性繊維１２ｂはこれに限られるもので
はなく、絶縁性を有する種々の繊維からトナーの特性に
応じて適宜選択すればよく、本実施例の場合はレーヨン
等の繊維でも可能である。In this embodiment, a non-magnetic toner having a negative polarity is used, and therefore, the insulating fiber 12b is preferably a material having a positive polarity, and a nylon fiber (provided that the volume resistance is 10 8 to 10 8 ). 10 15 Ωcm). However, the insulating fiber 12b is not limited to this, and may be appropriately selected from various insulating fibers according to the characteristics of the toner. In the case of the present embodiment, a fiber such as rayon may be used.

【００２４】導電性繊維１２ａは、上記の抵抗範囲１０
2 〜１０8 Ωｃｍを満たすことが第１の条件であるが、
導電性繊維の多くは、絶縁性繊維の紡糸前の原液の段階
でカーボン等の導電剤を分散しておいて、原液を繊維に
紡糸して製造する場合が多く、導電性繊維１２ａは、図
３に示すように、絶縁性繊維の単繊維（モノフィラメン
ト）は、絶縁部１６中に導電部１７が分散されて構成さ
れている。The conductive fiber 12a has the resistance range 10
The first condition is to satisfy 2 to 10 8 Ωcm.
Many of the conductive fibers are produced by dispersing a conductive agent such as carbon at the stage of a stock solution before spinning of insulating fibers, and then spinning the stock solution into fibers. As shown in FIG. 3, an insulating fiber monofilament (monofilament) is configured by dispersing a conductive portion 17 in an insulating portion 16.

【００２５】導電剤の分散方法は繊維メーカーによって
様々であるが、単繊維の絶縁部１６の表面全てを導電部
１７が覆っているとは限らず、従って、単繊維表面の導
電部１７がない露出部とトナーが接触することがあるこ
とを考慮すると、絶縁性繊維素材として、トナーに対し
正帯電特性のものを使用する方が好ましい。本実施例で
は、導電性繊維１２に使用する絶縁性繊維素材としてナ
イロンを使用した。Although the method of dispersing the conductive agent varies depending on the fiber manufacturer, the conductive portion 17 does not always cover the entire surface of the insulating portion 16 of the single fiber, and therefore, the conductive portion 17 on the surface of the single fiber does not exist. Considering that the exposed portion may come into contact with the toner, it is preferable to use a material having a positive charge characteristic for the toner as the insulating fiber material. In this embodiment, nylon is used as the insulating fiber material used for the conductive fiber 12.

【００２６】本実施例では、導電性繊維１２ａおよび絶
縁性繊維１２ｂとも、後述するように、トナーをクラウ
ド化するために弾力を有していることが必要で、そのた
めに両者とも、繊度（太さ）を１〜１０デニール／フィ
ラメント程度とし、それらを混毛した状態で、１万本〜
２０万本／インチ2 の植密度を持ち、かつパイル長１〜
１０ｍｍとなるように設定した。In the present embodiment, both the conductive fiber 12a and the insulating fiber 12b need to have elasticity in order to form a cloud of toner, as will be described later. Is about 1 to 10 denier / filament, and when they are mixed, 10,000
It has a planting density of 200,000 trees / inch 2 and a pile length of 1
It was set to be 10 mm.

【００２７】トナー流路制御部材５は、トナー供給ブラ
シ４に担持されたトナーをクラウド化するとともに、現
像スリーブ１の方向へ弾き出すためのもので、現像スリ
ーブ１の下方の現像容器３の部分に、トナー供給ブラシ
４に接触するように設けられている。本実施例では、ト
ナー流路制御部材５として、ＳＵＳもしくはリン青銅等
の厚さ１００μｍ〜１ｍｍの金属製薄板を用いた。The toner flow path control member 5 is for clouding the toner carried on the toner supply brush 4 and ejecting the toner in the direction of the developing sleeve 1. And the toner supply brush 4. In this embodiment, a thin metal plate having a thickness of 100 μm to 1 mm, such as SUS or phosphor bronze, is used as the toner flow path control member 5.

【００２８】このトナー流路制御部材５は、図のよう
に、ストレート形状に限るものではなく、トナーをクラ
ウド化する方向によっては形状を変えることもできる。
またトナー供給ブラシ４の接触面に介在するトナーへの
帯電付与を考慮して、トナー流路制御部材５のブラシ４
との接触面に、トナーに対する帯電付与能の高い樹脂の
層を設けてもよい。このようにすれば、トナーへの帯電
付与が安定することになる。The toner flow path control member 5 is not limited to a straight shape as shown in the figure, but may be changed in shape depending on the direction in which the toner is clouded.
In consideration of charging of the toner interposed on the contact surface of the toner supply brush 4, the brush 4
May be provided on the contact surface with the resin. In this case, the charging of the toner is stabilized.

【００２９】トナー規制部材７は、現像スリーブ１上に
塗布されたトナーの層厚を規制するためのもので、トナ
ー流路制御部材５に設けられ、現像スリーブ１に弾性的
に当接している。本実施例では、トナー規制部材７を、
ＪＩＳＡ硬度５０゜〜７０゜のウレタン系ゴム、シリコ
ーン系ゴム等のゴム弾性体で形成し、現像スリーブ１に
５〜５０ｇ／ｃｍの線圧で当接して、トナー層を規制す
るようにしてる。The toner regulating member 7 regulates the layer thickness of the toner applied on the developing sleeve 1, is provided on the toner flow path controlling member 5, and is in elastic contact with the developing sleeve 1. . In this embodiment, the toner regulating member 7 is
It is made of a rubber elastic material such as urethane rubber or silicone rubber having a JISA hardness of 50 to 70 degrees, and is brought into contact with the developing sleeve 1 at a linear pressure of 5 to 50 g / cm to regulate the toner layer.

【００３０】トナー回収ローラ８は、現像スリーブ１上
の現像に寄与しなかった現像残りのトナーを、現像スリ
ーブ１から電気的に剥ぎ取って担持することにより、現
像容器３内に回収して再度現像行程に戻すためのもの
で、現像スリーブ１と約１００μｍ〜１ｍｍの間隔を置
いて配置され、現像スリーブ１の回転方向と逆方向（最
近接部で同方向）に回転される。The toner collecting roller 8 collects the developing residual toner which has not contributed to the development on the developing sleeve 1 by electrically stripping it off from the developing sleeve 1 and carrying the toner. This is for returning to the developing process, and is arranged at a distance of about 100 μm to 1 mm from the developing sleeve 1, and is rotated in a direction opposite to the rotation direction of the developing sleeve 1 (the same direction at the closest part).

【００３１】本実施例では、トナー回収ローラ８として
表面を鏡面とした金属円筒を用い、電気的には接地する
構成をとったが、現像スリーブ１から剥ぎ取ったトナー
に対する離型性を考慮して、この回収ローラ８の表面に
は、テフロン等のフッ素系樹脂の層を２μｍから５０μ
ｍ程度の厚さで設けることができる。このような樹脂層
の付加は、現像スリーブ１への電気的リーク防止の役割
を果たす作用があり好ましい。回収ローラ８にはトナー
の離型性に応じて、所定の電圧を印加することもでき
る。In this embodiment, a metal cylinder having a mirror-finished surface is used as the toner collecting roller 8 and is electrically grounded. However, in consideration of the releasability of the toner peeled off from the developing sleeve 1, it is considered. On the surface of the collecting roller 8, a layer of a fluorine-based resin such as Teflon is coated in a thickness of 2 μm to 50 μm.
m. Such addition of the resin layer has a function of preventing electric leakage to the developing sleeve 1 and is preferable. A predetermined voltage can be applied to the collection roller 8 according to the releasing property of the toner.

【００３２】スクレーパ９は、現像スリーブ１から剥ぎ
取って回収ローラ８に担持した現像残りのトナーを、回
収ローラ８の表面から掻き取るためのもので、掻き取ら
れたトナーが撹拌部材１０上に落下するように、回収ロ
ーラ８の下部の面に当接されている。The scraper 9 is used to scrape off the remaining toner, which has been peeled off from the developing sleeve 1 and carried on the collecting roller 8, from the surface of the collecting roller 8, and the scraped toner is placed on the stirring member 10. It is in contact with the lower surface of the collection roller 8 so as to fall.

【００３３】撹拌部材１０は回転することにより、現像
容器３内に収容された非磁性トナーを撹拌しながら、ト
ナー供給ブラシ４に供給するためのものである。The stirring member 10 rotates to supply the nonmagnetic toner contained in the developing container 3 to the toner supply brush 4 while stirring.

【００３４】本実施例で使用した非磁性トナーは、熱可
塑性樹脂に着色剤を混合、分散し、粉砕化した、重量平
均粒径５μｍ以上のものを用いており、熱可塑性樹脂に
は負の帯電特性を持つポリスチレン、ポリエステル系の
樹脂を使用した。さらに、この非磁性トナー中には、負
の荷電制御剤を含有させた。The non-magnetic toner used in the present embodiment has a weight average particle diameter of 5 μm or more, which is obtained by mixing, dispersing, and pulverizing a colorant into a thermoplastic resin. Polystyrene and polyester resins having charging characteristics were used. Further, this non-magnetic toner contained a negative charge control agent.

【００３５】現像法は、イメージ露光−反転現像方式と
しており、図示しない帯電手段により感光ドラム１１の
表面を負極性に帯電し、図示しない露光手段によりイメ
ージ露光をして静電潜像を形成し、電源２により現像ス
リーブ１に、現像バイアスとして負極性ＤＣ電圧とＡＣ
電圧を重畳した電圧を印加して、負極性の非磁性トナー
を潜像（露光部）に付着する、つまり反転現像する方式
である。The developing method is an image exposure-reversal development method, in which the surface of the photosensitive drum 11 is negatively charged by a charging unit (not shown), and image exposure is performed by an exposure unit (not shown) to form an electrostatic latent image. A power source 2 applies a negative DC voltage and AC to the developing sleeve 1 as a developing bias.
In this method, a negative voltage non-magnetic toner is applied to a latent image (exposed portion) by applying a superimposed voltage, that is, reversal development is performed.

【００３６】また感光ドラム１１にはＯＰＣ感光体を用
いた。現像スリーブ１には、ＰＭＭＡとジメチルアミノ
エチルメタクリレートを９：１で混合した樹脂を表面に
コーとしたコートスリーブを用いた。An OPC photosensitive member was used for the photosensitive drum 11. As the developing sleeve 1, a coat sleeve having a surface coated with a resin in which PMMA and dimethylaminoethyl methacrylate were mixed at a ratio of 9: 1 was used.

【００３７】現像容器３内に収容された非磁性トナー
は、撹拌部材１０により撹拌されながらトナー供給ブラ
シ４に搬送され、ブラシ４の繊維と接触することによ
り、負に帯電される。そしてトナーは、トナー供給ブラ
シ４の繊維間および繊維表面に鏡映力等によって付着し
て担持され、ブラシ４の回転にともないトナー流路制御
部材５方向に搬送される。トナー流路制御部材５との接
触部まで搬送されたトナーは、制御部材５と接触するこ
とにより安定して電荷が付与されるとともに、図４に示
すように、制御部材５を通過した後、繊維の弾性力によ
りブラシ４の回転方向に矢印Ａのように弾き出され、ク
ラウド状となってブラシ４と現像スリーブ１との間の空
間に飛翔する。The non-magnetic toner contained in the developing container 3 is conveyed to the toner supply brush 4 while being stirred by the stirring member 10, and is negatively charged by coming into contact with the fibers of the brush 4. Then, the toner is carried between the fibers of the toner supply brush 4 and between the fibers by a mirror force or the like, and is conveyed toward the toner flow path control member 5 with the rotation of the brush 4. The toner conveyed to the contact portion with the toner flow path control member 5 is stably charged by contact with the control member 5, and after passing through the control member 5 as shown in FIG. Due to the elastic force of the fibers, the brush 4 is ejected in the direction of rotation of the brush 4 as indicated by an arrow A, and flies into a space between the brush 4 and the developing sleeve 1 in a cloud shape.

【００３８】なお、このようにトナー供給ブラシ４を流
路制御部材５に接触させてブラシ繊維中のトナーを弾き
出すようにすると、未帯電トナー等もブラシ繊維間から
弾き出して残留することを防げるので、未帯電トナー等
によるブラシ繊維の目詰まりも防止できるメリットがあ
る。When the toner supply brush 4 is brought into contact with the flow path control member 5 so as to eject the toner in the brush fibers, it is possible to prevent uncharged toner and the like from being ejected from between the brush fibers and remaining. Also, there is an advantage that the clogging of the brush fibers due to uncharged toner or the like can be prevented.

【００３９】上記の飛翔したクラウド状のトナーに対
し、トナー供給ブラシ４と現像スリーブ１の間には、電
源２から現像スリーブ１に印加された現像バイアスと、
電源６からブラシ４に印加されたバイアスとにより、負
に帯電したトナーを現像スリーブ１方向に引き寄せる電
界ベクトルＢが形成されている。従って、飛翔したトナ
ーのうち十分に帯電しているトナーのみが、この電界に
よって電気的に現像スリーブ１に引き寄せられて担持さ
れる。With respect to the flying cloud-shaped toner, a developing bias applied to the developing sleeve 1 from the power supply 2 is provided between the toner supply brush 4 and the developing sleeve 1.
An electric field vector B that attracts negatively charged toner toward the developing sleeve 1 is formed by the bias applied from the power source 6 to the brush 4. Therefore, only the sufficiently charged toner out of the flying toner is electrically attracted to and carried by the developing sleeve 1 by this electric field.

【００４０】たとえば図５に示すように、現像バイアス
のＤＣ分をＶｄｃ＝−３５０Ｖに設定した場合、電源６
により現像バイアスにΔＶ＝−７５０Ｖ程度のＤＣ電圧
を重畳したバイアスをトナー供給ブラシ４に印加するよ
うに設定しておくと、トナーの帯電は負であるので、飛
翔したトナーがＤＣ電圧の差分（−７５０Ｖ）による電
界の作用により、ブラシ４から現像スリーブ１へと引き
寄せられるようになる。For example, as shown in FIG. 5, when the DC component of the developing bias is set to Vdc = −350 V, the power supply 6
Is set so that a bias in which a DC voltage of about ΔV = −750 V is superimposed on the developing bias is applied to the toner supply brush 4, the toner is negatively charged. Due to the action of an electric field of -750 V), the brush 4 is attracted to the developing sleeve 1.

【００４１】このようにして現像スリーブ１上に供給さ
れたトナーは、その表面に鏡映力により担持され、現像
スリーブ１の回転にともないトナー規制部材７まで搬送
され、この弾性部材製のトナー規制部材７により薄層化
およびさらなる摩擦帯電電荷の付与が行われ、より均一
な帯電量分布を持った薄く緻密なトナー層に形成され
る。The toner thus supplied onto the developing sleeve 1 is carried on the surface thereof by a mirror force, and is conveyed to the toner regulating member 7 with the rotation of the developing sleeve 1, where the toner regulating member made of this elastic member is controlled. The member 7 reduces the thickness and imparts a further triboelectric charge to form a thin and dense toner layer having a more uniform charge amount distribution.

【００４２】本発明では、このように、帯電したトナー
をクラウド化して、電界により非接触でトナーを現像ス
リーブ１上に供給するので、トナーへの機械的ストレス
を著しく低減させることができる上、十分に帯電したト
ナーのみを現像スリーブ１上に供給してコートするの
で、帯電量分布が非常にシャープで偏りが少ないトナー
コート層を得ることができる。従って、高品位な画像を
安定して得ることができる現像が可能になる。In the present invention, since the charged toner is formed into a cloud and the toner is supplied onto the developing sleeve 1 in a non-contact manner by the electric field, the mechanical stress on the toner can be significantly reduced. Since only sufficiently charged toner is supplied onto the developing sleeve 1 for coating, it is possible to obtain a toner coat layer having a very sharp charge amount distribution and less deviation. Therefore, development that can stably obtain a high-quality image becomes possible.

【００４３】トナー規制部材７を通過したトナーは、感
光ドラム１１との対向部において、感光ドラム１上の静
電潜像に応じて転移して現像し、得られたトナー像は、
感光ドラム１の回転にともない図示しない転写部に搬送
され、そこで紙等の転写材上に転写される。The toner that has passed through the toner regulating member 7 is transferred and developed according to the electrostatic latent image on the photosensitive drum 1 in a portion facing the photosensitive drum 11, and the obtained toner image is
As the photosensitive drum 1 rotates, the photosensitive drum 1 is conveyed to a transfer unit (not shown), where it is transferred onto a transfer material such as paper.

【００４４】一方、現像に寄与せずに、現像スリーブ１
上に担持されたまま現像容器３内に戻されたトナーは、
回収ローラ８と現像スリーブ１との最近接部で形成され
る電界により現像スリーブ１から静電的に剥ぎ取られ、
回収ローラ８の表面に担持、回収される。担持されたト
ナーは、回収ローラ８の回転とともに、これに接するよ
うに配置されたスクレーパー９により掻き落とされ、再
度現像行程に戻される。On the other hand, the developing sleeve 1 does not contribute to the development.
The toner that has been returned to the inside of the developing container 3 while being carried on
The electrostatic roller is electrostatically peeled off from the developing sleeve 1 by an electric field formed at the closest portion between the collection roller 8 and the developing sleeve 1,
It is carried and collected on the surface of the collection roller 8. The carried toner is scraped off by a scraper 9 arranged in contact with the collecting roller 8 with the rotation of the collecting roller 8, and is returned to the developing process again.

【００４５】このように、現像剤回収部材として回転す
る円筒状のローラ８を用いることにより、フレッシュな
電極面が常に現像スリーブ１の表面と対向することとな
り、常時安定した電界が現像スリーブ１とローラ８間に
形成されるため、現像スリーブ１からのトナーの回収効
率は高いものになる。As described above, by using the rotating cylindrical roller 8 as the developer collecting member, the fresh electrode surface always faces the surface of the developing sleeve 1, and a stable electric field is always generated between the developing sleeve 1 and the developing sleeve 1. Since the toner is formed between the rollers 8, the efficiency of collecting the toner from the developing sleeve 1 is high.

【００４６】また、現像残りのトナーは、現像スリーブ
１の１回転ごとにスクレーパ９により確実に掻き落とさ
れるため、従来、現像時に発生していた感光ドラム１１
との連続的摺擦による熱の蓄積が抑えられ、急激なトナ
ー劣化を防止できる。Further, since the toner remaining after the development is surely scraped off by the scraper 9 for each rotation of the developing sleeve 1, the photosensitive drum 11 which has conventionally been generated during the development is developed.
And the accumulation of heat due to continuous rubbing with the toner can be suppressed, and rapid toner deterioration can be prevented.

【００４７】実施例２ トナー供給ブラシ４を構成する繊維は、実施例１に示し
たものに限られず、たとえばトナーに正帯電正のものを
用いた場合、ブラシ４の絶縁性繊維１２ｂおよび導電性
繊維１２ａは、トナーの帯電極性に対し負の帯電極性を
有する材質であることが望まれる。Embodiment 2 The fibers constituting the toner supply brush 4 are not limited to those shown in Embodiment 1. For example, when a positively charged toner is used for the toner, the insulating fibers 12b and the conductive It is desirable that the fiber 12a be a material having a negative charge polarity with respect to the charge polarity of the toner.

【００４８】すなわち、熱可塑性樹脂として正の荷電制
御剤を含んだスチレン−アクリル系樹脂、スチレン−ブ
タジエン樹脂等を使用したトナーを用いる場合、トナー
供給ブラシ４の絶縁性繊維１２ｂには、ポリエチレンや
ポリプロピレン等の繊維を使用し、また導電性繊維１２
ａの基礎構成部材である絶縁性繊維１６にも、同様なポ
リエチレンやポリプロピレン等の繊維を使用する。That is, when a toner using a styrene-acrylic resin or a styrene-butadiene resin containing a positive charge control agent as the thermoplastic resin is used, the insulating fiber 12b of the toner supply brush 4 is made of polyethylene or the like. Fibers such as polypropylene are used, and conductive fibers 12
Similar fibers such as polyethylene and polypropylene are used for the insulating fibers 16 which are the basic constituent members of a.

【００４９】もちろん、絶縁性繊維１２ｂと導電性繊維
１２ａの基礎となる絶縁性繊維は、同材質である他、異
なる材質にもすることができる。たとえば、絶縁性繊維
１２ｂには帯電付与能が高いポリエチレン系の繊維を使
用し、導電性繊維１２ａにはカーボン等を分散させたポ
リプロピレン系の繊維を用いるなどである。Of course, the insulating fibers which form the basis of the insulating fibers 12b and the conductive fibers 12a may be of the same material or different materials. For example, a polyethylene fiber having a high charge-imparting ability is used as the insulating fiber 12b, and a polypropylene fiber in which carbon or the like is dispersed is used as the conductive fiber 12a.

【００５０】本実施例では、トナー供給ブラシ４にこの
ような繊維構成をとることにより、正極帯電性のトナー
を用いても、トナー供給ブラシ４でトナーへの安定した
電荷付与が可能となり、その結果、現像スリーブ１への
トナーの供給も良好なものとなる。In this embodiment, by adopting such a fiber structure for the toner supply brush 4, even if a positively charged toner is used, the toner supply brush 4 can provide a stable charge to the toner. As a result, the supply of the toner to the developing sleeve 1 is also improved.

【００５１】[0051]

【発明の効果】以上説明したように、本発明によれば、
非磁性１成分現像装置の現像容器内に現像スリーブに対
し、現像剤供給部材として繊維を植毛したブラシローラ
からなるトナー供給ブラシを非接触に配置し、トナー供
給ブラシの繊維内に一成分現像剤の非磁性トナーを取り
込ませて現像スリーブへ向けて搬送し、そのブラシ繊維
が現像剤流路制御部材と接触して弾かれるときの弾性力
により、ブラシ繊維からトナーを機械的に弾き出してト
ナーをクラウド化し、トナー供給ブラシと現像スリーブ
との空間に飛翔させる。その際、トナー供給ブラシの繊
維を導電性繊維と絶縁性繊維の少なくとも２種の繊維で
構成しておき、絶縁性繊維により非磁性トナーへの摩擦
帯電電荷の付与を行い、また現像スリーブと供給ブラシ
との間に印加した電圧で、導電性繊維により現像スリー
ブとの間に電界を形成して、トナーの現像スリーブへの
飛翔による非接触な供給を行う。従って、現像スリーブ
への反転トナーや未帯電トナーを含まないトナーのコー
トができ、カブリ等のない高品位な画像を長期にわたっ
て安定に得ることができ、またトナーにかかる負荷を顕
著に低減して、トナーの寿命を格段に延ばすことも可能
となる。さらには非磁性１成分現像装置をトナー補給タ
イプとしても長期間にわたり使用可能である。As described above, according to the present invention,
A toner supply brush composed of a brush roller with fibers implanted as a developer supply member is disposed in a non-contact manner with a developing sleeve in a developing container of a non-magnetic one-component developing device, and a one-component developer is contained in the fibers of the toner supply brush. The non-magnetic toner is taken in and transported toward the developing sleeve, and the elasticity of the brush fiber when it comes in contact with the developer flow path control member causes the toner to be mechanically ejected from the brush fiber to remove the toner. It is clouded and flies into the space between the toner supply brush and the developing sleeve. At this time, the fibers of the toner supply brush are composed of at least two kinds of fibers of a conductive fiber and an insulating fiber, and the triboelectric charge is applied to the non-magnetic toner by the insulating fiber. An electric field is formed between the conductive sleeve and the developing sleeve by the voltage applied between the developing brush and the conductive fiber, thereby supplying the toner in a non-contact manner by flying to the developing sleeve. Therefore, it is possible to coat the developing sleeve with the toner that does not include the reversal toner or the uncharged toner, and it is possible to stably obtain a high-quality image without fog over a long period of time, and to significantly reduce the load on the toner. In addition, the life of the toner can be significantly extended. Further, the non-magnetic one-component developing device can be used for a long time even as a toner supply type.

【図面の簡単な説明】[Brief description of the drawings]

【図１】本発明の現像装置の一実施例を示す断面図であ
る。FIG. 1 is a sectional view showing one embodiment of a developing device of the present invention.

【図２】図１の現像装置に設置したトナー供給ブラシお
よびその繊維を示す図である。FIG. 2 is a diagram illustrating a toner supply brush and its fibers installed in the developing device of FIG. 1;

【図３】図２のブラシ繊維の一方を構成する導電性繊維
を示す断面図である。FIG. 3 is a cross-sectional view showing a conductive fiber constituting one of the brush fibers of FIG. 2;

【図４】図１の現像装置におけるトナー供給法を示す説
明図である。FIG. 4 is an explanatory diagram illustrating a toner supply method in the developing device of FIG. 1;

【図５】図４のトナー供給時のバイアスを示す説明図で
ある。FIG. 5 is an explanatory diagram illustrating a bias at the time of toner supply in FIG. 4;

【図６】従来の現像装置を示す断面図である。FIG. 6 is a cross-sectional view illustrating a conventional developing device.

【符号の説明】[Explanation of symbols]

１ 現像スリーブ ２ 現像バイアス電源 ３ 現像容器 ４ トナー供給ブラシ ５ トナー流路制御部材 ６ トナー供給ブラシ用電源 ７ トナー規制ブレード ８ トナー回収ローラ ９ スクレーパ １１ 感光ドラム REFERENCE SIGNS LIST 1 developing sleeve 2 developing bias power supply 3 developing container 4 toner supply brush 5 toner flow control member 6 toner supply brush power supply 7 toner regulating blade 8 toner collection roller 9 scraper 11 photosensitive drum

Claims (3)

【特許請求の範囲】[Claims] 【請求項１】 非磁性一成分現像剤を収容した現像容器
と、前記現像容器の開口部に像担持体と対向して回転自
在に配置され、供給された現像剤を担持して像担持体と
対向した現像部へ搬送する現像剤担持体と、前記現像部
よりも現像剤担持体の回転方向上流側に現像剤担持体に
非接触でかつ回転自在に配置され、現像剤を担持して現
像剤担持体に供給する現像剤供給部材と、現像剤担持体
と現像剤供給部材との対向部よりも現像剤供給部材の回
転方向上流側に、その一端を現像剤供給部材に接触して
配置された現像剤流路制御部材と、前記現像剤流路制御
部材との対向部よりも現像剤担持体の回転方向下流でか
つ前記現像部よりも現像剤担持体の回転方向上流側に、
現像剤担持体と接触して配置された現像剤規制部材と、
前記現像部よりも現像剤担持体の回転方向下流側に現像
剤担持体と非接触に配置された現像剤回収部材と、前記
現像剤担持体および現像材供給部材のそれぞれに電圧を
印加するそれぞれの電源とを有し、前記現像剤供給部材
が繊維を植毛したブラシローラからなり、前記繊維が少
なくとも２種の繊維を混毛してなることを特徴とする現
像装置。A developing container containing a non-magnetic one-component developer; and an image carrier which is rotatably disposed at an opening of the developing container so as to face the image carrier and carries the supplied developer. A developer carrying member that conveys the developer to the developing unit opposed to the developing unit, and is arranged in a non-contact and rotatable manner with the developer carrying member upstream of the developing unit in the rotation direction of the developer carrying unit, and carries the developer. A developer supply member that supplies the developer to the developer carrier, and one end of the developer supply member that is in contact with the developer supply member on the upstream side in the rotation direction of the developer supply member from an opposing portion between the developer carrier and the developer supply member. The arranged developer flow path control member, on the downstream side in the rotational direction of the developer carrier from the facing portion of the developer flow path control member and on the upstream side in the rotational direction of the developer carrier from the developing unit,
A developer regulating member arranged in contact with the developer carrier,
A developer collection member disposed in non-contact with the developer carrying member on the downstream side of the developer carrying member in the rotation direction of the developer carrying member, and a voltage application to each of the developer carrying member and the developer supply member. Wherein the developer supply member comprises a brush roller in which fibers are planted, and the fibers are obtained by mixing at least two kinds of fibers. 【請求項２】 前記２種の繊維が低抵抗の導電性繊維と
高抵抗の絶縁性繊維である請求項１の現像装置。2. The developing device according to claim 1, wherein said two kinds of fibers are a low-resistance conductive fiber and a high-resistance insulating fiber. 【請求項３】 前記絶縁性繊維が前記現像剤の帯電極性
に対し逆の帯電極性を有し、前記現像剤との接触時にこ
れに摩擦帯電電荷を付与する請求項２の現像装置。3. The developing device according to claim 2, wherein said insulating fiber has a charge polarity opposite to a charge polarity of said developer, and imparts a triboelectric charge to said developer when contacted with said developer.
JP30638398A 1998-09-03 1998-10-12 Development device Expired - Fee Related JP4006114B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP30638398A JP4006114B2 (en) 1998-10-12 1998-10-12 Development device
US09/386,152 US6278856B1 (en) 1998-09-03 1999-08-31 Developing apparatus featuring a brush roller having both low and high resistance filaments

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP30638398A JP4006114B2 (en) 1998-10-12 1998-10-12 Development device

Publications (2)

Publication Number Publication Date
JP2000122400A true JP2000122400A (en) 2000-04-28
JP4006114B2 JP4006114B2 (en) 2007-11-14

Family

ID=17956371

Family Applications (1)

Application Number Title Priority Date Filing Date
JP30638398A Expired - Fee Related JP4006114B2 (en) 1998-09-03 1998-10-12 Development device

Country Status (1)

Country Link
JP (1) JP4006114B2 (en)

Also Published As

Publication number Publication date
JP4006114B2 (en) 2007-11-14

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