JPS5930563A - Developing device - Google Patents

Developing device

Info

Publication number
JPS5930563A
JPS5930563A JP57139716A JP13971682A JPS5930563A JP S5930563 A JPS5930563 A JP S5930563A JP 57139716 A JP57139716 A JP 57139716A JP 13971682 A JP13971682 A JP 13971682A JP S5930563 A JPS5930563 A JP S5930563A
Authority
JP
Japan
Prior art keywords
toner
resin
developing device
holding body
electrostatic charge
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
Application number
JP57139716A
Other languages
Japanese (ja)
Inventor
Toshihiro Kasai
笠井 利博
Shigenobu Osawa
大沢 重信
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.)
Computer Basic Technology Research Association Corp
Original Assignee
Computer Basic Technology Research Association Corp
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 Computer Basic Technology Research Association Corp filed Critical Computer Basic Technology Research Association Corp
Priority to JP57139716A priority Critical patent/JPS5930563A/en
Publication of JPS5930563A publication Critical patent/JPS5930563A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00Apparatus for electrographic processes using a charge pattern
    • G03G15/06Apparatus for electrographic processes using a charge pattern for developing
    • G03G15/08Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
    • G03G15/0803Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer in a powder cloud

Landscapes

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

Abstract

PURPOSE:To enable the formation of a toner layer having a uniform distribution of electrostatic charge on a toner holding body, by coating the toner conveyance surface of the toner holding body with a resin and providing a toner regulating blade in proximity to the coated toner conveyance surface. CONSTITUTION:The toner 4 supplied from a toner supply part 3 is held on the toner conveyance surface of a toner holding body 5. Said surface is coated with a resin 6 vulnerable to electrostatic charging by friction and the surface of the resin 6 is sandblasted to permit easy holding of the toner. A toner regulating blade 7 is provided in proximity to the conveyance surface, whereby a toner layer having a uniform distribution of electrostatic charge is formed on the toner holding body. The toner layer having the electrostatic charge of the extent at which no adverse influences are given to the image quality is formed at the uniform distribution of the electrostatic charge on the body 5 in the above- mentioned way, whereby the always stable and sharp image quality virtually free from ground fogs is obtd.

Description

【発明の詳細な説明】 本発明な,1、たとえば電子複写機の感光体ゝラムに形
成された静電潜像を現像する現像装置に関する。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates, for example, to a developing device for developing an electrostatic latent image formed on a photosensitive drum of an electronic copying machine.

〔う1、明の技術的背景〕 最近、この釉の現像装置として、像担持体としての感光
体ドラムとトナー保持体としての現像ローラとの間に互
いに平行な複数本のワイヤからなるグリッドを設け、こ
のグリッドおよび現像ローラに直流および交IN.ある
いはそのいずれかの偏倚電圧を印加することにより、現
像ローラで搬送される一成分トナーを飛翔させ、75\
つそのトノー−を現像ローラとグリッドとの間で一種の
・?ウ・′ノ゛ークラウド状態にしC1感光体ドラム上
の静電潜像を現像するものが開発され9つを)る。
[1. Technical background of Ming] Recently, as a developing device for this glaze, a grid consisting of a plurality of parallel wires has been installed between the photosensitive drum as an image bearing member and the developing roller as a toner holding member. The grid and developing roller are provided with DC and AC IN. Alternatively, by applying one of these bias voltages, the one-component toner conveyed by the developing roller is caused to fly, and the 75\
A kind of ・? between the developing roller and the grid? C. A device was developed that developed the electrostatic latent image on the C1 photoreceptor drum in a cloud state.

〔背景技術の問題点〕[Problems with background technology]

しかしながら、このような方式の現像装置には次のよう
な問題があった。すなわち、安′itした画質を得るた
めには、トナー保持体としての現像ローラ上に均一な帯
電量分布を持つトナー9層を形成させることであるが、
従来の装置では、現像ローラに近接して設けられたトナ
ーの規制ブレードとの摩擦帯電のみであるため、充分な
トナーの摩擦帯電が得られない。このため、i・ナーの
帯電量が不足したり、あるいは分布を持ってしまい、こ
れらが原因でトナーの飛翔に悪影響を与え、結果的に複
写画像の画質に悪影響をおよぼし、地力ブリなどが生じ
るという問題があっだ0 〔発明の目的〕 本発明は上記事情に鑑みてなされたもので、その目的と
するところは、トナー保持体上に均一な帯電量分布でか
つ画質に悪影響を与えない程度の帯電量を持つトナ一層
を形成でき、もって地力、ブリなどのない常に安定した
鮮明な画質が得られる現像装置を提供することにある。
However, this type of developing device has the following problems. That is, in order to obtain reliable image quality, it is necessary to form nine layers of toner having a uniform charge amount distribution on the developing roller as a toner holding member.
In conventional devices, sufficient frictional electrification of the toner cannot be obtained because only the toner is charged by friction with a regulating blade provided close to the developing roller. For this reason, the amount of charge on the i-toner may be insufficient or uneven, which may adversely affect the flight of the toner, resulting in an adverse effect on the quality of the copied image, resulting in blurring due to soil force, etc. [Objective of the Invention] The present invention has been made in view of the above-mentioned circumstances, and its object is to provide a uniform charge amount distribution on the toner holder and to an extent that does not adversely affect the image quality. To provide a developing device capable of forming a single layer of toner having a charge amount of 1,000 yen, thereby always providing stable and clear image quality without blurring or blurring.

〔発明の概要〕[Summary of the invention]

本発明は、トナー保持体のトナー搬送面を樹脂によって
被覆し、この樹脂によって被覆されたトナー搬送面に近
接あるいは略接触してトナー規制ブレードを設けること
により、)・ナー保持体上に均一な帯電量分布を持つト
ナ一層を形成するようにしたものである。
The present invention has the following advantages: by coating the toner conveying surface of the toner holder with a resin and providing a toner regulating blade in close proximity to or almost in contact with the toner conveying surface coated with the resin, A single layer of toner having a charge distribution is formed.

〔発明の実施例〕[Embodiments of the invention]

以下、本発明の一実施例について図面を参照して説明す
る。
An embodiment of the present invention will be described below with reference to the drawings.

第1図において、Jは電子複写機における像担持体、た
とえば感光体ドラムで、図示しない露光手段によってそ
の表面に原稿の画像に対応した静電潜像が形成されるも
のであり、図示矢印a方向に回転する。なお、この感光
体ドラム1は′電気的VC接地される。しかして、上記
感光体ドラム1と相対向する部位には現像装置#、2が
近接し゛乙配設されている。この現像装置2について豹
、明するど、3は一成分トナー(磁性トナー、非磁性ト
ナ7のいずれでもよい)4を供給するトナー供給部、5
はこのトナー供給部3から供給されるトナー4を搬送す
るトナー保持体、たとえば導電性の現像ローラで、その
表面は摩擦帯電し易い樹脂6で被艮(コーティング)さ
れており、図示矢印す方向に回転する。そして、上記樹
脂60表面は、トナー4の保持を容易にするためにサン
ドゾゾラストされている。上記樹脂6としては、トナー
4が負帯電性の場合はメタアクリレート系樹脂を、正帯
電性の場合はフッ素系樹脂を用い、これを数+μm〜数
百μmの膜厚にて現像ローラ5の表面に塗布する。
In FIG. 1, J is an image carrier in an electronic copying machine, such as a photosensitive drum, on the surface of which an electrostatic latent image corresponding to the image of the original is formed by an exposure means (not shown), and is indicated by the arrow a in the figure. Rotate in the direction. Note that this photosensitive drum 1 is electrically grounded to VC. Developing devices # and 2 are disposed in close proximity to a portion facing the photosensitive drum 1. Regarding this developing device 2, 3 is a toner supply section 5 which supplies mono-component toner (either magnetic toner or non-magnetic toner 7) 4;
denotes a toner holder, such as a conductive developing roller, which conveys the toner 4 supplied from the toner supply section 3. Its surface is coated with a resin 6 that is easily triboelectrically charged, and it moves in the direction of the arrow in the figure. Rotate to . The surface of the resin 60 is sandozorasted to facilitate retention of the toner 4. As the resin 6, a methacrylate resin is used when the toner 4 is negatively chargeable, and a fluorine resin is used when the toner 4 is positively chargeable. Apply to the surface.

なお、メタアクリレート系樹脂としては、三菱レーヨン
製のアクリコン、アクリにヮトM1アクリベットSM1
住友化学製のスミペックスMO、スミペックスLG、ス
ミペックスLO。
In addition, as the methacrylate resin, Mitsubishi Rayon's Acrycon, Acryniwato M1 Acryvet SM1
Sumipex MO, Sumipex LG, and Sumipex LO manufactured by Sumitomo Chemical.

旭化成Hのペルノクウダ、ペルベッ)5ON、ペルペラ
)6ON、三iレーヨン製のパビック(メチルメタルア
クリレートとα−メチルスチレンとの共重合体)などを
用いる。′また、フッ素系樹脂としては、ダイキン工業
製のポリフロンF−101、ポリフロンF−103、ポ
リフロンD−1、三片フロロケミカル製のテフロン6J
Asahi Kasei H's Perno Kuuda, Pervet) 5ON, Perpera) 6ON, Sani Rayon's Pabic (a copolymer of methyl metal acrylate and α-methylstyrene), etc. are used. 'In addition, as fluororesins, Polyflon F-101, Polyflon F-103, Polyflon D-1 manufactured by Daikin Industries, and Teflon 6J manufactured by Mikata Fluorochemicals are used.
.

デフロン6 CJ 、テフロン:305なトラ用いる。Deflon 6 CJ, Teflon: 305 tiger is used.

また、7はトナー規制ブレードで、その先端か樹脂6で
被覆された現1象ローラ5の表面と近接(材質によっC
は略接触状態でもよい)して配設されており、現像ロー
ラ5で搬送されるトナーの)9さを均一にレベリングす
る。8はグリッドで、感光体ドラム1と現像ローラ5と
の間に配設され・Cいる。このグリッド8は、たとえば
第2図に示すように複数本の導電性ワイヤ9・・・が互
いに平行に配設されてなり、これら各ワイヤ9・・・は
その両端部がワイヤ支持板10゜20によってそれぞれ
支持されている。そして、上記各ワイヤ9・・・は、第
1図に示すように感光体ドラム1の表面からの距離が同
一となるように、つまシ感光体ドラム1と同心円となる
よう円弧状に配列されている。ここに、上記各ワイヤ9
・・・は、その表面に絶縁性薄膜が形成されておシ、直
径が120μmで、それぞれ1羽間隔で配設されている
。なお、上記表面の絶縁性薄膜は、現像ロー25との間
あるいは感光体ドラム1との間で放電が生じ々いように
するために必要である。
In addition, 7 is a toner regulating blade, the tip of which is close to the surface of the virtual roller 5 coated with resin 6 (depending on the material).
The rollers 5 and 5 may be in substantially contact with each other, and the toner conveyed by the developing roller 5 is uniformly leveled. A grid 8 is disposed between the photosensitive drum 1 and the developing roller 5. This grid 8 is made up of a plurality of conductive wires 9 arranged in parallel with each other, as shown in FIG. 20, respectively. Each of the wires 9 is arranged in an arc so as to be concentric with the photosensitive drum 1 so that the distance from the surface of the photosensitive drum 1 is the same as shown in FIG. ing. Here, each of the above wires 9
... has an insulating thin film formed on its surface, has a diameter of 120 μm, and is arranged at intervals of one wing. The insulating thin film on the surface is necessary to prevent discharge from occurring between the developing roller 25 and the photosensitive drum 1.

一方、1ノおよび12は現像ローラ5へのバイアス電源
であシ、1ノは直流電源、12は交流電源である。また
、13および14はグリッド8へのバイアス電源であシ
、13は直流電源、14は交流電源である。なお、上記
直流電源I J 、 1.9は、用いるトナーの極性に
応じて出力電圧の極性(正または負)′f、切換スイ、
チis、it;によって切換えられるようになっている
On the other hand, 1 and 12 are bias power supplies to the developing roller 5, 1 and 1 are DC power supplies, and 12 is an AC power supply. Further, 13 and 14 are bias power supplies to the grid 8, 13 is a DC power supply, and 14 is an AC power supply. Note that the DC power supply I J , 1.9 has a polarity (positive or negative) of the output voltage depending on the polarity of the toner used, a switching switch,
It can be switched by is, it;

このような構成において、寸ず第1の実験として、たと
えばトナー4として非磁性の負帯電性トナーを使用し、
樹脂6としてアクリベットSMを使用し、直流電源1ノ
の出力電圧を−200yYYF3交流電源12の出力電
圧を2000&ルト(周波数は1 k)Iz >、直流
電源13の出力電圧を+20 Orrrルト、交流電源
14の出力電圧を1000ボルト(周波数は1kHz 
)、交流電源12.14の出力電圧は同位相に設定して
実験を行った結果、同条件で樹脂6を被覆しないときに
比較して、地力ブリなどのない常に安定した鮮明な画質
が得られた。すなわち、現像ローラ5の表面を樹脂6で
被覆することによp、規制ブレード7によるトナー4の
摩擦帯電のみならず、樹脂6との摩擦帯電によって帯電
量が増加し、未帯電トナーが減少する。したがって、現
像ローラ5上に均一な層厚および均一な帯電量分布で、
かつ複写画像に地力ブリがでない程度の帯電量を持つト
ナ一層を形成できる。これにより、複写画像に地力ブリ
がなくなシ、複写画像の画質が著しく向上するものであ
る。
In such a configuration, as a first experiment, for example, a non-magnetic negatively charged toner is used as the toner 4,
Use Acrybet SM as the resin 6, set the output voltage of DC power supply 1 to -200yYYF3, set the output voltage of AC power supply 12 to 2000° (frequency is 1 k), and set the output voltage of DC power supply 13 to +20 Orrr. 14 output voltage to 1000 volts (frequency is 1kHz
), the output voltages of the AC power supplies 12 and 14 were set to the same phase, and the results showed that compared to when the resin 6 was not coated under the same conditions, stable and clear image quality without any ground blur was obtained. It was done. That is, by coating the surface of the developing roller 5 with the resin 6, not only the toner 4 is tribo-electrified by the regulation blade 7, but also the amount of charge is increased due to the frictional electrification with the resin 6, and the amount of uncharged toner is reduced. . Therefore, with a uniform layer thickness and uniform charge amount distribution on the developing roller 5,
Moreover, it is possible to form a single layer of toner having a sufficient amount of charge to prevent blurring in the copied image. As a result, there is no blurring in the copied image, and the image quality of the copied image is significantly improved.

次に、第2の実験として、たとえばトナー4として非磁
性の正帯電性トナーを使用し、樹脂6としてポリフロン
F’−101を使用し、直流電源11の出力電圧を+2
00?ルト、直流電源13の出力電圧を一200ボルト
とし、その他は前記第1の実験の場合と同条件で実験を
行った結果においても、前記第1の実験の場合と同様に
地力ブリなどのない常に安定した鮮明な画質が得られた
Next, as a second experiment, for example, a non-magnetic positively charged toner was used as the toner 4, Polyflon F'-101 was used as the resin 6, and the output voltage of the DC power supply 11 was increased by +2.
00? The output voltage of the DC power source 13 was 1,200 volts, and the other conditions were the same as in the first experiment. As in the first experiment, there was no ground braking. Stable and clear image quality was always obtained.

第3図は本発明の他の実施例を示すものである。この実
施例は、トナー規制ブレード7をたとえば導電性ゴムで
形成し、それに直流電源17から所定の電位を印加する
ようにしたものである。なお、18は直流電源17の出
力電圧の極性を切換えるための切換スイッチである。
FIG. 3 shows another embodiment of the invention. In this embodiment, the toner regulating blade 7 is made of, for example, conductive rubber, and a predetermined potential is applied thereto from a DC power source 17. Note that 18 is a changeover switch for switching the polarity of the output voltage of the DC power supply 17.

このような構成において、前記実施例と同様な実験を行
った結果、よυ一層の効果が得られた。
In such a configuration, an experiment similar to that of the above embodiment was conducted, and as a result, an even greater effect was obtained.

すなわち、規制ブレード7による摩擦帯電および現像ロ
ーラ4上の樹脂6との摩擦帯電のみならず、規制ブレー
ド7からトナー4への電荷注入が起シ、トナー4の帯電
確率が増加し、未帯電トナーが著しく減少する。したが
って、より一層、地力ブリがなくなり、複写画像の画質
が更に向上するものである。なお、第1の実験例のとき
は直流電源17の出力電圧を一30o?ルトとし、第2
の実験例のときは上記出力電圧を+300?ルトとした
That is, in addition to the frictional charging caused by the regulating blade 7 and the frictional charging with the resin 6 on the developing roller 4, charge injection from the regulating blade 7 to the toner 4 occurs, increasing the charging probability of the toner 4, and causing the uncharged toner to become decreases significantly. Therefore, the image quality of the copied image is further improved by further eliminating the ground force blur. In addition, in the first experimental example, the output voltage of the DC power supply 17 was -30°? the root and the second
In the experimental example, the above output voltage was set to +300? Ruto.

なお、前記実施例では、電子複写轡の現像装置に実施し
た場合について説明したが、これに限らず、たとえば電
子プリンタあるいはファクシミリなどの現像装置にも同
様に実施し得る。
In the above embodiment, a case has been described in which the present invention is implemented in a developing device for an electronic copying machine, but the present invention is not limited thereto, and can be similarly implemented in a developing device such as an electronic printer or a facsimile machine.

〔発明の効果〕〔Effect of the invention〕

以上詳述したように本発明によれば、トナー保持体上に
均一な帯電量分布でかつ画質に悪影響を与えない程度の
帯電量を持つトナ一層を形成でき、もって地力ブリなど
のない常に安定した鮮明な画質が得られる現像装置を提
供できる。
As described in detail above, according to the present invention, it is possible to form a single layer of toner on the toner holder with a uniform charge distribution and a charge amount that does not adversely affect image quality. It is possible to provide a developing device that can obtain clear image quality.

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

第1図は本発明の一実施例を示す構成図、第2図は同実
施例におけるグリッドを詳細に示す構成図、第3図は本
発明の他の実施例を示す構成図である。 1・・・感光体ドラム(像担持体)、2・・・現像装置
、3・・・トナー供給部、4・・・トナー、5・・・現
像ローラ(トナー保持体)、6・・・樹脂、7・・・ト
ナー規制ブレード、11.17・・・直流電源、ノ2・
・・交流電源。 第1図 第2図
FIG. 1 is a block diagram showing one embodiment of the present invention, FIG. 2 is a block diagram showing details of a grid in the same embodiment, and FIG. 3 is a block diagram showing another embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Photosensitive drum (image carrier), 2... Developing device, 3... Toner supply section, 4... Toner, 5... Developing roller (toner holding body), 6... Resin, 7... Toner regulation blade, 11.17... DC power supply, No. 2.
··AC source. Figure 1 Figure 2

Claims (2)

【特許請求の範囲】[Claims] (1)トナー供給部と、このトナー供給部および静電潜
像が形成される像担持体と近接して配設され前記トナー
供給部から供給されるトナーを搬送するトナー保持体と
を具備し、前記トナー保持体に偏倚電圧を印加すること
により、前記トナー保持体で搬送されるトナーを飛翔さ
せて前記静電潜像を現像する現像装置において、前記ト
ナー保持体のトナー搬送面を樹脂によって被覆し、この
樹脂によって被覆されたトナー搬送面に近接あるいは略
接触してトナー規制ブレードを設けてなることを特徴と
する現像装置。
(1) The toner supply unit includes a toner supply unit, and a toner holding body that is disposed close to the toner supply unit and the image carrier on which the electrostatic latent image is formed and conveys the toner supplied from the toner supply unit. , a developing device that develops the electrostatic latent image by causing the toner conveyed by the toner holder to fly by applying a bias voltage to the toner holder; 1. A developing device comprising: a toner regulating blade provided in close proximity to or substantially in contact with a toner conveying surface coated with the resin;
(2)  前記トナー規制ブレードを導電性部材で形成
してそれに所定の電位を印加するようにしたことを特徴
とする特許請求の範囲第1項記載の現像装置。
(2) The developing device according to claim 1, wherein the toner regulating blade is formed of a conductive member and a predetermined potential is applied thereto.
JP57139716A 1982-08-13 1982-08-13 Developing device Pending JPS5930563A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57139716A JPS5930563A (en) 1982-08-13 1982-08-13 Developing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57139716A JPS5930563A (en) 1982-08-13 1982-08-13 Developing device

Publications (1)

Publication Number Publication Date
JPS5930563A true JPS5930563A (en) 1984-02-18

Family

ID=15251744

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57139716A Pending JPS5930563A (en) 1982-08-13 1982-08-13 Developing device

Country Status (1)

Country Link
JP (1) JPS5930563A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62235976A (en) * 1986-04-07 1987-10-16 Toshiba Corp Developing device
JPS62184004U (en) * 1986-05-14 1987-11-21
JPS63285568A (en) * 1987-05-18 1988-11-22 Fuji Xerox Co Ltd Developing device for image forming device
JPH0511600A (en) * 1991-07-06 1993-01-22 Fujitsu Ltd Electrostatic recorder using one-component developer
US5679855A (en) * 1994-11-26 1997-10-21 Basf Aktiengesellschaft Preparation of benzophenone imines

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS528830A (en) * 1975-07-11 1977-01-24 Fuji Photo Film Co Ltd Electrophotographic development method

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS528830A (en) * 1975-07-11 1977-01-24 Fuji Photo Film Co Ltd Electrophotographic development method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62235976A (en) * 1986-04-07 1987-10-16 Toshiba Corp Developing device
JPS62184004U (en) * 1986-05-14 1987-11-21
JPS63285568A (en) * 1987-05-18 1988-11-22 Fuji Xerox Co Ltd Developing device for image forming device
JPH0511600A (en) * 1991-07-06 1993-01-22 Fujitsu Ltd Electrostatic recorder using one-component developer
US5679855A (en) * 1994-11-26 1997-10-21 Basf Aktiengesellschaft Preparation of benzophenone imines

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