JPH0535108A - Developing device in electrophotographic method - Google Patents
Developing device in electrophotographic methodInfo
- Publication number
- JPH0535108A JPH0535108A JP3194440A JP19444091A JPH0535108A JP H0535108 A JPH0535108 A JP H0535108A JP 3194440 A JP3194440 A JP 3194440A JP 19444091 A JP19444091 A JP 19444091A JP H0535108 A JPH0535108 A JP H0535108A
- Authority
- JP
- Japan
- Prior art keywords
- developer
- sleeve
- fur
- polarity
- electret
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title description 9
- 239000000463 material Substances 0.000 claims abstract description 18
- 239000004020 conductor Substances 0.000 claims abstract description 3
- 229920005989 resin Polymers 0.000 description 11
- 239000011347 resin Substances 0.000 description 11
- 230000032258 transport Effects 0.000 description 6
- 239000002184 metal Substances 0.000 description 4
- -1 polyethylene Polymers 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- 208000025309 Hair disease Diseases 0.000 description 3
- 208000034653 disorder of pilosebaceous unit Diseases 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- PEVRKKOYEFPFMN-UHFFFAOYSA-N 1,1,2,3,3,3-hexafluoroprop-1-ene;1,1,2,2-tetrafluoroethene Chemical group FC(F)=C(F)F.FC(F)=C(F)C(F)(F)F PEVRKKOYEFPFMN-UHFFFAOYSA-N 0.000 description 1
- WSQZNZLOZXSBHA-UHFFFAOYSA-N 3,8-dioxabicyclo[8.2.2]tetradeca-1(12),10,13-triene-2,9-dione Chemical compound O=C1OCCCCOC(=O)C2=CC=C1C=C2 WSQZNZLOZXSBHA-UHFFFAOYSA-N 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 229920000089 Cyclic olefin copolymer Polymers 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 229920002292 Nylon 6 Polymers 0.000 description 1
- 229920000305 Nylon 6,10 Polymers 0.000 description 1
- 229920002302 Nylon 6,6 Polymers 0.000 description 1
- 239000002033 PVDF binder Substances 0.000 description 1
- 229920001774 Perfluoroether Polymers 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 229920006243 acrylic copolymer Polymers 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229920006026 co-polymeric resin Polymers 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 229920001038 ethylene copolymer Polymers 0.000 description 1
- XUCNUKMRBVNAPB-UHFFFAOYSA-N fluoroethene Chemical compound FC=C XUCNUKMRBVNAPB-UHFFFAOYSA-N 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 229920003207 poly(ethylene-2,6-naphthalate) Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000011112 polyethylene naphthalate Substances 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920005672 polyolefin resin Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920002620 polyvinyl fluoride Polymers 0.000 description 1
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
Landscapes
- Magnetic Brush Developing In Electrophotography (AREA)
- Developing For Electrophotography (AREA)
- Dry Development In Electrophotography (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、電気的吸引力により現
像剤を現像域に保持搬送するタイプの現像剤搬送スリー
ブを備えた現像装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a developing device provided with a developer carrying sleeve of a type for holding and carrying a developer in a developing area by an electric attraction force.
【０００２】[0002]
【従来技術】一般に複写機等の電子写真装置において
は、感光体表面に形成された静電潜像を、顕電性トナー
から成る現像剤を用いて現像し、該潜像が顕像化された
トナー像を得る。このような現像を行うための現像装置
は、回転駆動する現像剤搬送スリーブを備えており、該
スリーブにより摩擦帯電されたトナーを現像域に搬送
し、現像を行うものである。この様な現像装置として、
前記スリーブにバイアス電圧を印加し、電気的吸引力に
より現像剤、即ち帯電トナーの保持搬送を行うタイプの
装置が公知である。この種の装置においては、現像剤搬
送スリーブと摺擦する様に回転ファーブラシが設けられ
ており、このファーブラシにより現像剤（トナー）を攪
拌し摩擦帯電せしめるとともに、現像域を通過した後の
現像剤搬送スリーブ面に残存するトナーのクリーニング
が行われる。2. Description of the Related Art Generally, in an electrophotographic apparatus such as a copying machine, an electrostatic latent image formed on the surface of a photoconductor is developed by using a developer composed of an electrophotographic toner to visualize the latent image. To obtain a toned image. A developing device for performing such development includes a developer transport sleeve that is rotationally driven, and transports the toner frictionally charged by the sleeve to a developing area to perform the development. As a developing device like this,
There is known a device of a type in which a bias voltage is applied to the sleeve and a developer, that is, a charged toner is held and conveyed by an electric attraction force. In this type of apparatus, a rotary fur brush is provided so as to rub against the developer transport sleeve. The fur brush stirs the developer (toner) to frictionally charge it, and after the developer passes through the developing area. The toner remaining on the surface of the developer carrying sleeve is cleaned.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、上記の
現像装置においては、これを長期間しようしていると、
ファーブラシの毛が現像剤搬送スリーブに圧接されてい
るために毛乱れを生じ、該ファーブラシの攪拌による摩
擦帯電作用やクリーニング作用の低下を来し、現像剤の
供給ムラを生じる結果、画像欠損を発生する。However, in the above developing device, if the developing device is used for a long period of time,
The fur brush bristles are pressed against the developer conveying sleeve to cause hair disorder, resulting in a decrease in frictional charging action and cleaning action due to stirring of the fur brush, resulting in uneven supply of the developer, resulting in image loss. To occur.
【０００４】従って本発明の目的は、電気的吸引力によ
り帯電トナーを現像域に保持搬送するタイプの現像剤搬
送スリーブを備えた現像装置において、スリーブのクリ
ーニング及び現像剤の摩擦帯電を行うためのファーブラ
シの毛乱れが有効に抑制され、長期間の使用によって
も、現像剤の供給ムラ及びそれによる画像欠損の発生が
防止された現像装置を提供することにある。Therefore, an object of the present invention is to perform cleaning of the sleeve and triboelectric charging of the developer in a developing device equipped with a developer carrying sleeve of the type for holding and carrying the charged toner in the developing area by an electric attraction force. It is an object of the present invention to provide a developing device in which hair disorder of a fur brush is effectively suppressed and uneven supply of a developer and image loss due to the uneven supply of the developer are prevented even after long-term use.
【０００５】[0005]
【課題を解決するための手段】本発明によれば、所定極
性に帯電された現像剤を電気的吸引力によって保持搬送
するための回転駆動型現像剤搬送スリーブと、該スリー
ブと摺擦する様に配置されている回転ファーブラシとを
備え、前記ファーブラシは、芯体が導電性材料で形成さ
れ、毛材がエレクトレットで形成され且つその先端の電
荷は前記現像剤の帯電極性と逆極となっているととも
に、該ファーブラシの芯体には、毛材エレクトレット先
端の電荷と同極のバイアス電圧が印加されることを特徴
とする電子写真法における現像装置が提供される。According to the present invention, a rotary drive type developer carrying sleeve for carrying and carrying a developer charged to a predetermined polarity by an electric attraction force, and a rubbing contact with the sleeve. The fur brush has a core body formed of a conductive material, a bristle material formed of an electret, and a charge at the tip of the fur brush is opposite to a polarity opposite to the charging polarity of the developer. In addition, a developing device in electrophotography is provided in which a bias voltage having the same polarity as the electric charge at the tip of the bristle electret is applied to the core of the fur brush.
【０００６】[0006]
【実施例】本発明を、以下、添付図面に示す具体例に基
づいて説明する。本発明の現像装置を示す図１におい
て、この装置においては、現像容器１内に回転駆動型の
現像剤搬送スリーブ２が設けられており、さらに現像容
器１の上部には現像剤補給用ホッパー３が設けられ、該
ホッパー３からそれ自体公知の顕電性トナーが補給され
る。このトナー４は、後述するエレクトレットファーブ
ラシ１５による攪拌により所定極性に摩擦帯電される。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to specific examples shown in the accompanying drawings. Referring to FIG. 1 showing a developing device of the present invention, in this device, a rotary drive type developer conveying sleeve 2 is provided in a developing container 1, and a developer replenishing hopper 3 is provided above the developing container 1. Is provided, and the electrophotographic toner known per se is replenished from the hopper 3. The toner 4 is triboelectrically charged to a predetermined polarity by stirring with an electret fur brush 15 described later.
【０００７】一方、現像剤搬送スリーブ２には、前記ト
ナー４の帯電電荷の逆極性のバイアス電圧が印加され、
静電吸引力によって該帯電トナー４の保持搬送が行われ
る。またスリーブ２の上方には、適当な間隔をおいて厚
み調製ブレード６が設けられており、スリーブ２によっ
て搬送される帯電トナー４の厚みが一定となる様に調整
される。On the other hand, a bias voltage having a polarity opposite to the charge of the toner 4 is applied to the developer carrying sleeve 2.
The charged toner 4 is held and conveyed by the electrostatic attraction force. Further, a thickness adjusting blade 6 is provided above the sleeve 2 at an appropriate interval so that the thickness of the charged toner 4 conveyed by the sleeve 2 is adjusted to be constant.
【０００８】上記の現像装置は、図１に示されている様
に、感光層１０を備えた感光体ドラム１１に前記現像剤
搬送スリーブ２が対面する様に設けられ、該スリーブ２
によって搬送された帯電トナー４により、該感光層１０
上に形成された静電潜像の現像が行われる。この場合、
図面においては感光体ドラム１１の回転方向と現像剤搬
送スリーブ２の回転方向が反対方向で示されているが、
これは同方向であってもよい。また現像は、所謂接触現
像で行ってもよいし、非接触現像で行ってもよい。As shown in FIG. 1, the developing device is provided so that the developer carrying sleeve 2 faces a photosensitive drum 11 having a photosensitive layer 10.
By the charged toner 4 conveyed by the photosensitive layer 10
The electrostatic latent image formed above is developed. in this case,
In the drawing, the rotation direction of the photosensitive drum 11 and the rotation direction of the developer transport sleeve 2 are shown as opposite directions.
This may be in the same direction. The development may be so-called contact development or non-contact development.
【０００９】本発明の現像装置においては、前記スリー
ブ２と摺擦する様な位置関係で、エレクトレットファー
ブラシ１５が設けられており、これによりトナー４の攪
拌による摩擦帯電とともにスリーブ２に残存するトナー
４の除去を行う。このエレクトレットファーブラシ１５
の構造を示す図２において、このブラシ１５は、導電性
の芯体１５ａにエレクトレット毛材１５ｂが設けられた
構造を有しており、該毛材１５ｂの先端は、トナー４の
帯電極性と逆極性の電荷を有しており、またその根本は
トナー４の帯電極性と同極性の電荷を有している。即
ち、毛材１５ｂの先端がスリーブ２と摺擦するために、
スリーブ２上に残存するトナーは、それに作用する電気
的吸引力によって容易に除去される。またエレクトレッ
トファーブラシ１５の芯体１５ａには、毛材１５ｂの先
端の電荷と同極のバイアス電圧が印加される。これによ
り、毛材１５ｂの先端と芯体１５ａとの間には電気的反
発力が作用するため、長期間現像装置を使用した場合に
おいても毛材１５ｂが寝て毛乱れを生じることはない。
かかるエレクトレット毛材１５ｂの材料としては、永久
電気分極可能な任意の高分子材料を使用することができ
るが、一般的には、ポリエチレン、ポリプロピレン、エ
チレン−ブテン共重合体、イオン−架橋オレフィン共重
合体、エチレン−アクリル共重合体等のオレフィン系樹
脂；ポリフッ化ビニル、ポリフッ化ビニリデン、フッ化
ビニル／フッ化ビニリデン共重合体、四フッ化エチレン
樹脂（ＰＴＦＥ）、四フッ化エチレン−パーフルオロア
ルコキシエチレン共重合樹脂（ＰＦＡ樹脂）、四フッ化
エチレン−六フッ化プロピレン共重合樹脂（ＦＥＰ樹
脂）等のフッ素樹脂；ポリ塩化ビニル、塩素化ポリオレ
フィン等の塩素樹脂；ポリエチレンテレフタレート、ポ
リエチレンナフタレート、ポリブチレンテレフタレート
等の熱可塑性ポリエステル；ナイロン６、ナイロン１
２、ナイロン６，６、ナイロン６，１０等のポリアミ
ド；各種アクリル系樹脂等が単独或いは２種以上の組合
せで使用される。これらの内でも、ＰＴＦＥ樹脂、ＰＦ
Ａ樹脂、ＦＥＰ樹脂等のフッ素樹脂が電荷の保持性がよ
く、耐久性もよいことから好ましい。エレクトレットの
生成は、熱エレクトレット化法、エレクトロエレクトレ
ット化法、放射線エレクトレット化法、光エレクトレッ
ト化法等のそれ自体公知の任意の方法を、用いる高分子
の種類に応じて適用することにより行われる。上記高分
子、特にフッ素樹脂に対しては熱エレクトレット化法や
エレクトロエレクトレット化法が有利に適用される。ま
たエレクトレット毛材１５ｂは、図３に示す通り、上記
の様にして得られたエレクトレットシート乃至フィルム
１５’を、点線Ａに沿って裁断することにより作成さ
れ、これを導電性芯体に取りつけることにより、本発明
において使用するエレクトレットファーブラシが得られ
る。In the developing device of the present invention, an electret fur brush 15 is provided in such a positional relationship that it rubs against the sleeve 2, whereby the toner remaining on the sleeve 2 as a result of frictional charging by stirring the toner 4 is provided. 4 is removed. This electret fur brush 15
2, the brush 15 has a structure in which a conductive core 15a is provided with an electret bristle material 15b, and the tip of the bristle material 15b has a polarity opposite to that of the toner 4. It has a polar charge, and its root has a charge of the same polarity as the charging polarity of the toner 4. That is, since the tip of the bristle material 15b rubs against the sleeve 2,
The toner remaining on the sleeve 2 is easily removed by the electric attraction force acting on it. A bias voltage having the same polarity as the electric charge at the tip of the bristle 15b is applied to the core 15a of the electret fur brush 15. As a result, an electric repulsive force acts between the tip of the bristle material 15b and the core body 15a, so that the bristle material 15b does not lie down and the hair is disturbed even when the developing device is used for a long period of time.
As a material of the electret bristle material 15b, any polymer material capable of permanent electric polarization can be used. Generally, polyethylene, polypropylene, ethylene-butene copolymer, ion-crosslinked olefin copolymer is used. Olefin resins such as polymer, ethylene-acrylic copolymer; polyvinyl fluoride, polyvinylidene fluoride, vinyl fluoride / vinylidene fluoride copolymer, tetrafluoroethylene resin (PTFE), tetrafluoroethylene-perfluoroalkoxy Fluorine resin such as ethylene copolymer resin (PFA resin) and tetrafluoroethylene-hexafluoropropylene copolymer resin (FEP resin); chlorine resin such as polyvinyl chloride and chlorinated polyolefin; polyethylene terephthalate, polyethylene naphthalate, poly Thermoplastic polyester such as butylene terephthalate Ether; nylon 6, nylon 1
2, polyamides such as nylon 6,6 and nylon 6,10; various acrylic resins and the like are used alone or in combination of two or more. Among these, PTFE resin and PF
Fluorine resins such as A resin and FEP resin are preferable because they have good charge retention and durability. The electret is produced by applying an arbitrary method known per se such as a thermal electretization method, an electro-electretization method, a radiation electretization method, an optical electretization method or the like depending on the type of polymer to be used. The thermal electretization method and the electro-electretization method are advantageously applied to the above-mentioned polymers, particularly fluororesins. Further, as shown in FIG. 3, the electret bristle material 15b is prepared by cutting the electret sheet or film 15 ′ obtained as described above along the dotted line A, and attaching this to a conductive core body. Thus, the electret fur brush used in the present invention is obtained.
【００１０】本発明において、エレクトレットファーブ
ラシ１５の毛材１５ｂ先端の表面電荷密度は、帯電トナ
ー４との間に充分な電気的吸引力が作用する程度に設定
されるが、通常、毛材１５ｂ先端の表面電位（絶対値）
が現像剤搬送スリーブ２の表面電位（絶対値）よりも大
となる様に設定される。両者が同一であったり或いは逆
の関係にあるときには、スリーブ２と帯電トナー４との
間に作用する電気的吸引力が大であるために、残存トナ
ーの除去を有効に行うことが困難となる。また該ブラシ
１５の表面電位（絶対値）は、感光層１０の表面電位
（絶対値）よりも小さくすることが好適である。そうで
ない場合には、現像に不都合を生じる場合がある。更に
芯体１５ａに印加されるバイアス電圧は、毛材１５ｂ先
端の毛乱れが防止されるような電気的反発力が生じる程
度でよく、毛材１５ｂ先端の電荷密度によっても異なる
が、通常、２００〜８００Ｖの範囲が適当である。また
かかるエレクトレットファーブラシ１５は、図１に示す
如く、現像剤搬送スリーブ２と反対方向に回転すること
が望ましく、同方向に回転させる時には、その位置から
いって、現像装置の開口部分（即ち、現像域）からのト
ナー飛散を生じる場合がある。In the present invention, the surface charge density at the tip of the bristle material 15b of the electret fur brush 15 is set so that a sufficient electric attraction force acts between the bristle material 15b and the charged toner 4. Surface potential of tip (absolute value)
Is set to be larger than the surface potential (absolute value) of the developer transport sleeve 2. When the two are the same or in the opposite relationship, since the electric attraction force acting between the sleeve 2 and the charged toner 4 is large, it becomes difficult to effectively remove the residual toner. .. The surface potential (absolute value) of the brush 15 is preferably smaller than the surface potential (absolute value) of the photosensitive layer 10. If not, development may be inconvenient. Further, the bias voltage applied to the core body 15a may be such that an electric repulsive force that prevents hair disorder at the tip of the hair material 15b is generated, and is usually 200 although it varies depending on the charge density at the tip of the hair material 15b. A range of up to 800V is suitable. As shown in FIG. 1, the electret fur brush 15 preferably rotates in the opposite direction to the developer transport sleeve 2. When rotating in the same direction, the electret fur brush 15 moves from that position to the opening portion (that is, Toner scattering from the developing area) may occur.
【００１１】また本発明においては、上記エレクトレッ
トファーブラシ１５がスリーブ２と摺擦した後に、該ブ
ラシ１５が当接する様に、ブラシ１５の上方に、帯電板
２０を設けることが好ましい。この帯電板２０は、帯電
トナー４と同極性に帯電されたものであり、該帯電板２
０とブラシ１５が当接することにより、該ブラシ１５に
吸着された残存トナーは、該帯電板２０からの電気的反
発力及びブラシ１５の弾性復帰力によって飛翔し、再び
現像スリーブ２に付着し、保持搬送され、現像に再使用
される。この様な帯電板２０としては、例えば前述した
エレクトレット材から成る樹脂板や金属板が使用され
る。金属板を使用する時には、これにバイアス電圧を印
加して該金属板をトナー４と同極性に帯電させればよ
い。かかる帯電板２０の電荷密度等は、ブラシ１５から
のトナーの脱離が有効に促進されるように適宜定めれば
よい。Further, in the present invention, it is preferable to provide the charging plate 20 above the brush 15 so that the brush 15 comes into contact with the electret fur brush 15 after the electret fur brush 15 has rubbed against the sleeve 2. The charging plate 20 is charged to the same polarity as the charging toner 4, and the charging plate 2
When 0 and the brush 15 come into contact with each other, the residual toner adsorbed on the brush 15 flies by the electric repulsive force from the charging plate 20 and the elastic restoring force of the brush 15, and adheres to the developing sleeve 2 again. It is held and transported and reused for development. As such a charging plate 20, for example, a resin plate or a metal plate made of the above-described electret material is used. When using a metal plate, a bias voltage may be applied to the metal plate to charge the metal plate to the same polarity as the toner 4. The charge density and the like of the charging plate 20 may be appropriately determined so that the detachment of the toner from the brush 15 is effectively promoted.
【００１２】[0012]
【発明の効果】本発明の現像装置によれば、現像剤搬送
スリーブに残存する帯電トナーを確実に除去することが
できるとともに、長期間の現像装置の使用に際しても、
ファーブラシの毛乱れが有効に回避され、毛乱れに起因
する現像剤の供給ムラ及びそれによる画像欠損の発生が
防止される。According to the developing device of the present invention, the charged toner remaining on the developer carrying sleeve can be surely removed, and even when the developing device is used for a long period of time,
Disturbance of the fur brush is effectively avoided, and uneven supply of the developer due to the disorganization of the fur and the resulting image loss are prevented.
【図１】 本発明の現像装置の構造を示す図。FIG. 1 is a diagram showing a structure of a developing device of the present invention.
【図２】 本発明の現像装置に使用されるエレクトレッ
トファーブラシの構造を示す図。FIG. 2 is a diagram showing the structure of an electret fur brush used in the developing device of the present invention.
【図３】 図２のエレクトレットファーブラシの製造方
法を説明するための説明図。FIG. 3 is an explanatory view for explaining a method for manufacturing the electret fur brush of FIG.
Claims (1)
引力によって保持搬送するための回転駆動型現像剤搬送
スリーブと、該スリーブと摺擦する様に配置されている
回転ファーブラシとを備え、 前記ファーブラシは、芯体が導電性材料で形成され、毛
材がエレクトレットで形成され且つその先端の電荷は前
記現像剤の帯電極性と逆極となっているとともに、 該ファーブラシの芯体には、毛材エレクトレット先端の
電荷と同極のバイアス電圧が印加されることを特徴とす
る電子写真法における現像装置。Claim: What is claimed is: 1. A rotary drive type developer carrying sleeve for holding and carrying the developer charged to a predetermined polarity by an electric attraction force, and a sleeve arranged so as to rub against the sleeve. The fur brush has a core body made of a conductive material, a bristle material made of an electret, and a charge at a tip of the fur brush has a polarity opposite to that of the developer. A developing device in electrophotography, wherein a bias voltage having the same polarity as the electric charge at the tip of the bristle electret is applied to the core of the fur brush.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3194440A JPH0535108A (en) | 1991-08-02 | 1991-08-02 | Developing device in electrophotographic method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3194440A JPH0535108A (en) | 1991-08-02 | 1991-08-02 | Developing device in electrophotographic method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0535108A true JPH0535108A (en) | 1993-02-12 |
Family
ID=16324629
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3194440A Pending JPH0535108A (en) | 1991-08-02 | 1991-08-02 | Developing device in electrophotographic method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0535108A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60204909A (en) * | 1984-03-30 | 1985-10-16 | Toshiba Corp | Operating method for house power plant |
-
1991
- 1991-08-02 JP JP3194440A patent/JPH0535108A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60204909A (en) * | 1984-03-30 | 1985-10-16 | Toshiba Corp | Operating method for house power plant |
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