JPH06258919A - Electrophotographic printing device - Google Patents

Electrophotographic printing device

Info

Publication number
JPH06258919A
JPH06258919A JP4497193A JP4497193A JPH06258919A JP H06258919 A JPH06258919 A JP H06258919A JP 4497193 A JP4497193 A JP 4497193A JP 4497193 A JP4497193 A JP 4497193A JP H06258919 A JPH06258919 A JP H06258919A
Authority
JP
Japan
Prior art keywords
base material
photosensitive drum
voltage
drum
image
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
JP4497193A
Other languages
Japanese (ja)
Inventor
Hisao Ono
尚生 小野
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.)
Oki Electric Industry Co Ltd
Original Assignee
Oki Electric Industry Co Ltd
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 Oki Electric Industry Co Ltd filed Critical Oki Electric Industry Co Ltd
Priority to JP4497193A priority Critical patent/JPH06258919A/en
Publication of JPH06258919A publication Critical patent/JPH06258919A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To use only one type of high-voltage power source for a transfer/ electrifier without requiring two types of high-voltage power sources whose polarities are different, to simplify the constitution of a process, and to obtain high reliability by continuously impressing a voltage on the electrical conductive base material of an image carrier. CONSTITUTION:A photosensitive drum 2 is obtained by forming a uniform thin film on the surface thereof by coating or vaporizing and deposing a photoconductive material on the surface. An electrical conductive material such as aluminum is used as the base material 3 thereof. On the base material 3 of the drum 2, the high voltage such as positive several hundreds to a thousand volts are impressed by the DC high-voltage power source 4. Therefore, the base material 3 is not electrically grounded. When the surface of the drum 2 is exposed in such a state, electric charge is selectively accumulated only at the exposed part by the voltage impressed on the base material 3. A primary electrifier 5 is obtained by a roller made of an electrical conductive fur brush or an electrical conductive foam material and rotated at a speed different from the peripheral speed of the drum 2 by a driving means to uniformly rub the surface of the drum 2.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】この発明は、画像担持体として、
光導電性材料膜である感光体を表面に付着させた導電性
ドラムを用いる電子写真印刷装置の、電子写真印刷プロ
セス部の構造に関するものである。
This invention relates to an image carrier,
The present invention relates to a structure of an electrophotographic printing process unit of an electrophotographic printing apparatus that uses a conductive drum having a surface of which a photoconductor that is a photoconductive material film is attached.

【0002】[0002]

【従来の技術】図3に、従来の電子写真印刷装置に用い
られている電子写真印刷プロセスの模式図を示す。図3
において、22は表面に光導電性材料を塗布または蒸着
して均一な薄膜を形成した感光ドラムであり、その基材
はアルミニウムなどの導電性材料でできている。電子写
真印刷プロセスは、この感光ドラム22を矢印Cの方向
に一定速度で回転させることで行われる。
2. Description of the Related Art FIG. 3 shows a schematic diagram of an electrophotographic printing process used in a conventional electrophotographic printing apparatus. Figure 3
2 is a photosensitive drum having a uniform thin film formed by coating or vapor depositing a photoconductive material on its surface, and its base material is made of a conductive material such as aluminum. The electrophotographic printing process is performed by rotating the photosensitive drum 22 in the direction of arrow C at a constant speed.

【0003】図3に従ってそのプロセスを順を追って説
明する。まず、一次帯電器23により感光ドラム22の
表面を一定の電位(絶対値で通常数百ないし千ボルト)
に一様帯電する。一次帯電器23では、感光ドラム22
の表面に一定の距離をおいて感光ドラム22の幅方向と
平行に張架した帯電ワイヤ24に、図示しない高圧電源
により発生された高電圧(絶対値で数キロボルト)を印
加してコロナ放電を生じさせる。帯電ワイヤ24を囲む
シールドプレート25は、このコロナ放電を安定化さ
せ、均一な電荷を放電面である感光ドラム22の表面に
与える作用をする。
The process will be described step by step with reference to FIG. First, the surface of the photosensitive drum 22 is kept at a constant potential by the primary charger 23 (usually several hundred to 1,000 volts in absolute value).
Uniformly charged. In the primary charger 23, the photosensitive drum 22
A high voltage (absolute value of several kilovolts) generated by a high voltage power source (not shown) is applied to the charging wire 24 stretched in parallel with the width direction of the photosensitive drum 22 at a certain distance on the surface of the corona discharge to cause corona discharge. Give rise to. The shield plate 25 surrounding the charging wire 24 serves to stabilize the corona discharge and give uniform charges to the surface of the photosensitive drum 22, which is the discharge surface.

【0004】次に、一様帯電された感光ドラム22の表
面に、レーザービームやLED(発光ダイオード)アレ
イなどの図示しない画像露光光源から発せられる画像光
26を照射し、前記感光ドラム22の表面を選択的に露
光して電荷を逃がし、周囲との電位差によって生じる潜
画像すなわち静電潜像を形成する。露光によって感光ド
ラム22の表面の電荷を逃がすために、感光ドラムの基
材は、電気的にアースされている。現像装置27の内部
には、粉体トナーなどの現像剤28が収納されていて、
この現像剤28の一部は、図示しない高圧電源により前
記感光ドラム22の一様帯電電位に近い電位を付加され
た導電性の現像剤供給ローラー29の表面に付着して帯
電および薄層化され、図示しない駆動手段により矢印D
の方向に現像剤供給ローラー29回転し、現像剤供給ロ
ーラー29の表面に付着した現像剤28が矢印Dの方向
に移動して前記感光ドラム22上の静電潜像に接触す
る。このとき、帯電された現像剤28は、前記静電潜像
上に静電気力により引き寄せられ、静電潜像を現像して
可視像化する。現像剤28によって可視像化された記録
画像は、図示しない搬送手段によって転写帯電器30と
感光ドラム22とのあいだに給送される普通紙などの記
録媒体33に転写される。
Next, the uniformly charged surface of the photosensitive drum 22 is irradiated with image light 26 emitted from an image exposure light source (not shown) such as a laser beam or an LED (light emitting diode) array, and the surface of the photosensitive drum 22 is irradiated. Are selectively exposed to release the electric charge and form a latent image, that is, an electrostatic latent image caused by a potential difference from the surroundings. The base material of the photosensitive drum is electrically grounded in order to release the charge on the surface of the photosensitive drum 22 by the exposure. Inside the developing device 27, a developer 28 such as powder toner is stored.
A part of the developer 28 is attached to the surface of the conductive developer supply roller 29 to which a potential close to the uniform charging potential of the photosensitive drum 22 is applied by a high voltage power source (not shown) to be charged and thinned. , Arrow D by a driving means not shown
The developer supply roller 29 rotates in the direction of, and the developer 28 attached to the surface of the developer supply roller 29 moves in the direction of arrow D and comes into contact with the electrostatic latent image on the photosensitive drum 22. At this time, the charged developer 28 is attracted onto the electrostatic latent image by an electrostatic force, and develops the electrostatic latent image into a visible image. The recording image visualized by the developer 28 is transferred to a recording medium 33 such as plain paper which is fed between the transfer charger 30 and the photosensitive drum 22 by a conveying unit (not shown).

【0005】転写帯電器30では、前記感光ドラム22
の表面に一定の距離をおいて感光ドラム22の幅方向に
平行に張架した帯電ワイヤ31に、図示しない高圧電源
により発生された、前記一様帯電電位とは逆極性の高電
圧を印加することでコロナ放電を生じさせ、前記記録媒
体33を前記一様帯電電位とは逆極性に帯電し、感光ド
ラム22の表面に形成された現像剤による記録画像を静
電気力により吸引し、記録媒体33上に転写する。帯電
ワイヤ31を囲むシールドプレート32は、この際、こ
のコロナ放電を安定化させ、記録媒体33に均一に画像
を転写させる作用をする。
In the transfer charger 30, the photosensitive drum 22 is
A high voltage having a polarity opposite to that of the uniform charging potential generated by a high voltage power source (not shown) is applied to the charging wire 31 stretched parallel to the width direction of the photosensitive drum 22 with a certain distance on the surface of the photosensitive drum 22. As a result, corona discharge is generated, the recording medium 33 is charged with a polarity opposite to the uniform charging potential, the recording image formed by the developer formed on the surface of the photosensitive drum 22 is attracted by electrostatic force, and the recording medium 33 is discharged. Transfer to the top. At this time, the shield plate 32 surrounding the charging wire 31 has a function of stabilizing this corona discharge and uniformly transferring an image to the recording medium 33.

【0006】この後、記録媒体上に転写された現像剤
は、熱ローラーなどを用いる定着装置34によって加熱
溶融され、前記記録媒体上に記録画像として定着され
る。一方、記録媒体33に転写されずに感光ドラム22
の表面に残った現像剤は、クリーニング装置36のクリ
ーニングブレード37によって機械的に掻き取られ、ク
リーニング装置内に蓄積された後、廃棄、あるいは図示
しない搬送手段によって現像装置27に還流され再利用
される。クリーニング装置の上流側または下流側の近傍
には、除電ランプ35があり、現像剤を転写した後の感
光ドラム表面を均一に露光して、残留している電荷をす
べて感光ドラム基材に逃がしている。こうして残留現像
剤と残留電荷とを除去された感光ドラム表面は、再び一
次帯電器により一様帯電され、次の画像形成プロセスを
行い、これらのプロセスを連続的に繰り返すことにより
画像形成を行う。
After that, the developer transferred onto the recording medium is heated and melted by the fixing device 34 using a heat roller or the like, and is fixed as a recorded image on the recording medium. On the other hand, the photosensitive drum 22 is not transferred to the recording medium 33.
The developer remaining on the surface of the cleaning device is mechanically scraped by the cleaning blade 37 of the cleaning device 36, accumulated in the cleaning device, and then discarded or returned to the developing device 27 by a transporting device (not shown) for reuse. It A discharge lamp 35 is provided in the vicinity of the upstream side or the downstream side of the cleaning device, and uniformly exposes the surface of the photosensitive drum after the transfer of the developer so that all the remaining charges are released to the photosensitive drum base material. There is. The surface of the photosensitive drum from which the residual developer and the residual charge have been removed in this manner is again uniformly charged by the primary charger, the next image forming process is performed, and the image is formed by continuously repeating these processes.

【0007】[0007]

【発明が解決しようとする課題】しかしながら、上記構
成の電子写真印刷プロセスをプリンタなどに使用する場
合、一次帯電器のワイヤおよび転写帯電器のワイヤに、
コロナ放電を発生させるため、それぞれ極性の違う数キ
ロボルトの高電圧を印加する必要があり、そのための高
圧電源が必要である。また、そのほかにも現像バイアス
電圧を供給するための数百ボルトの高圧電源も必要とす
るため、高圧放電に対する機構上の工夫もしなければな
らないため、構造が複雑となり、装置を大型化し、高価
なものにしてしまうという問題点があった。
However, when the electrophotographic printing process having the above structure is used in a printer or the like, the wire of the primary charger and the wire of the transfer charger are
In order to generate corona discharge, it is necessary to apply a high voltage of several kilovolts with different polarities, and a high voltage power supply for that is required. In addition, a high-voltage power supply of several hundreds of volts for supplying the developing bias voltage is also required, and a mechanical device for high-voltage discharge must be devised, which complicates the structure, increases the size of the apparatus, and is expensive. There was a problem of making it a thing.

【0008】[0008]

【課題を解決するための手段】本発明は、前記課題を解
決するために、光導電性材料の薄膜を表面に付着させた
画像担持体を回転させ、一次帯電、画像露光、現像の各
工程をこの順序で行い印刷画像の形成を行う電子写真印
刷装置において、画像担持体の導電基材に連続的に電圧
を印加された画像担持体であることを特徴としている。
In order to solve the above-mentioned problems, the present invention rotates an image carrier having a thin film of a photoconductive material adhered to the surface thereof, and performs each step of primary charging, image exposure and development. In this order, the electrophotographic printing apparatus for forming a printed image is characterized in that it is an image carrier in which a voltage is continuously applied to the conductive base material of the image carrier.

【0009】また、本発明の一次帯電器は、電気的に接
地された導体のブラシまたはフォーム材を、画像担持体
表面に接触させて行う除電器であることを特徴としてい
る。
Further, the primary charger of the present invention is characterized in that it is a static eliminator which is carried out by bringing a conductive brush or foam material, which is electrically grounded, into contact with the surface of the image carrier.

【0010】[0010]

【作用】上記構成とすることにより、種類の違う多数の
高電圧電源を必要とせず、少ない電源の数でも従来と同
等の電子写真印刷プロセスを実現することことができ、
しかも、一次帯電プロセスを、電気的に接地された導体
のブラシまたはフォーム材を、画像担持体表面に接触さ
せて除電することにより、帯電ムラの少ない、安価な一
次帯電器を具備した電子写真印刷装置を提供することが
できる。
With the above configuration, it is possible to realize an electrophotographic printing process equivalent to that of the conventional one without using a large number of different types of high-voltage power supplies and with a small number of power supplies.
Moreover, the primary charging process is performed by bringing a conductive brush or foam material, which is electrically grounded, into contact with the surface of the image bearing member to eliminate the charge, thereby providing electrophotographic printing with an inexpensive primary charger with less uneven charging. A device can be provided.

【0011】[0011]

【実施例】図1に、本発明に係る電子写真印刷装置に用
いられる電子写真印刷プロセスの模式図を示す。図1に
おいて、2は表面に光導電性材料を塗布または蒸着して
均一な薄膜を形成した感光ドラムであり、その基材3は
アルミニウムなどの導電性材料であることは従来の技術
と同じである。この感光ドラム2を、矢印Aの方向に一
定の速度で回転させながら電子写真印刷プロセスを行
う。本実施例における電子写真印刷プロセスでは、前記
感光ドラム2の基材3には、プラス数百から千ボルト、
すなわち従来技術における一様帯電電位程度の高電圧
が、直流高圧電源4により印加されている。したがっ
て、本実施例では、基材3は電気的にアースされてな
く、この状態で感光ドラム2の表面を露光すると、露光
した部分にだけ、基材3に印加された電圧により選択的
に電荷がたまることになる。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a schematic diagram of an electrophotographic printing process used in an electrophotographic printing apparatus according to the present invention. In FIG. 1, reference numeral 2 is a photosensitive drum having a photoconductive material coated or vapor-deposited on its surface to form a uniform thin film, and its base material 3 is a conductive material such as aluminum, as in the prior art. is there. The electrophotographic printing process is performed while rotating the photosensitive drum 2 in the direction of arrow A at a constant speed. In the electrophotographic printing process according to the present embodiment, the base material 3 of the photosensitive drum 2 has a positive voltage of several hundred to 1,000 volts,
That is, a high voltage of about the uniform charging potential in the prior art is applied by the DC high voltage power supply 4. Therefore, in this embodiment, the base material 3 is not electrically grounded, and when the surface of the photosensitive drum 2 is exposed in this state, only the exposed portion is selectively charged by the voltage applied to the base material 3. Will accumulate.

【0012】以下、図1に従って本実施例における電子
写真印刷プロセスを詳しく説明する。 一次帯電器5
は、導電性のファーブラシまたは導電性のフォーム材で
できたローラーであり、図示しない駆動手段により前記
感光ドラム2とは周速差のある速度で回転し、感光ドラ
ム2の表面を一様にむらなく褶擦する。この一次帯電器
5は、電気的にアースされていて、感光ドラム2の表面
を一様に除電してゼロ電位の状態にする。一次帯電器5
により、一様にゼロ電位となった感光ドラム2の表面
は、次の露光工程で、レーザービームあるいはLED
(発光ダイオード)アレイなどを用いた図示しない光書
き込みヘッドからの画像光6を照射され、選択的に露光
されることで、前述のとおり露光部分に電荷がたまり、
静電潜像が形成される。
The electrophotographic printing process in this embodiment will be described in detail below with reference to FIG. Primary charger 5
Is a roller made of a conductive fur brush or a conductive foam material, and is rotated at a speed having a peripheral speed difference from the photosensitive drum 2 by a driving means (not shown) so that the surface of the photosensitive drum 2 is made uniform. Rub evenly. The primary charger 5 is electrically grounded, and uniformly discharges the surface of the photosensitive drum 2 to a zero potential state. Primary charger 5
As a result, the surface of the photosensitive drum 2 that has been uniformly brought to zero potential will have a laser beam or LED in the next exposure step.
Image light 6 from an optical writing head (not shown) using a (light emitting diode) array or the like is irradiated and selectively exposed to accumulate electric charge in the exposed portion as described above.
An electrostatic latent image is formed.

【0013】本実施例で用いられている感光ドラムは、
図2に示すように機能分離型(二層型)と呼ばれるOP
C(Organic Photo Conductor )ドラムである。そし
て、その光導電性材料膜は図2(a)に示すように薄い
二つの層、すなわちキャリヤ発生層(Carrier Generati
on Layer,以下CGLと呼ぶ)41と、キャリヤ輸送層
(Carrier Transport Layer,以下CTLと呼ぶ)42と
で構成されていて、表面側からCTL層,CGL層,ア
ルミニウム基材の順で密着構造となっている。CGL層
41は、Ti-フタロシアニンにより構成されていて、露
光源からの光が照射されると内部にプラスとマイナスの
電荷対を発生させる性質を有し、CTL層42は、ヒド
ラゾン+ポリカーボネイトで構成されていて、プラスの
電荷のみを通過させる性質をもっている。
The photosensitive drum used in this embodiment is
As shown in FIG. 2, OP called function separation type (two-layer type)
It is a C (Organic Photo Conductor) drum. As shown in FIG. 2A, the photoconductive material film has two thin layers, that is, a carrier generation layer (Carrier Generati).
on layer (hereinafter, referred to as CGL) 41 and a carrier transport layer (hereinafter, referred to as CTL) 42, and an adhesion structure is formed in order of a CTL layer, a CGL layer, and an aluminum base material from the surface side. Has become. The CGL layer 41 is composed of Ti-phthalocyanine and has a property of generating positive and negative charge pairs inside when irradiated with light from an exposure source, and the CTL layer 42 is composed of hydrazone + polycarbonate. It has the property of passing only positive charges.

【0014】従来のこの種の感光ドラムを用いる電子写
真印刷プロセスでは、感光ドラム表面にマイナスの電荷
を与えると、CTL層の性質により表面にマイナス電荷
を保持し、露光光源から照射された画像光がCGL層に
達すると、CGL層の中で発生した電荷対のうちプラス
の電荷はCTL層を通過して感光ドラム表面に達し表面
のマイナス電荷を中和し、同時に発生したマイナスの電
荷はアルミ基材にアースされ、感光ドラム表面に静電潜
像を形成する。しかしながら、本実施例では、CGL
層、CTL層共に電荷を持たない状態であり、アルミ基
材にプラスの電荷を直流電源4から与えているので、露
光光源からの画像光がCGL層に達すると、CGL層の
中で発生した電荷対のうちプラスの電荷はCTL層を通
過して感光ドラム表面に達し、同時に発生したマイナス
の電荷はアルミ基材に吸収される。
In the conventional electrophotographic printing process using this type of photosensitive drum, when a negative charge is applied to the surface of the photosensitive drum, the negative charge is held on the surface due to the property of the CTL layer, and image light emitted from the exposure light source is used. Reach the CGL layer, positive charges of the charge pairs generated in the CGL layer pass through the CTL layer and reach the surface of the photosensitive drum to neutralize the negative charges on the surface, and the negative charges generated at the same time are aluminum. Grounded on the substrate to form an electrostatic latent image on the surface of the photosensitive drum. However, in this embodiment, CGL
Since both the layers and the CTL layer have no electric charge, and the positive electric charge is applied to the aluminum base material from the DC power source 4, when the image light from the exposure light source reaches the CGL layer, it is generated in the CGL layer. The positive charge of the charge pair passes through the CTL layer to reach the surface of the photosensitive drum, and the negative charge generated at the same time is absorbed by the aluminum base material.

【0015】したがって、ここで形成された静電潜像
は、従来技術における静電潜像とは異なり前述のとおり
露光部分にのみ電荷がたまっていることになる。そのた
め、次の現像工程における現像装置7の現像剤供給ロー
ラー8には高圧電源により高電圧を印加する必要がな
く、電気的にアースするか、または数十ないし百ボルト
程度のバイアス電圧を印加するだけで、前記静電潜像を
現像剤9により可視像化することができる。
Therefore, unlike the electrostatic latent image in the prior art, the electrostatic latent image formed here has electric charges accumulated only in the exposed portion as described above. Therefore, it is not necessary to apply a high voltage to the developer supply roller 8 of the developing device 7 in the next developing step by using a high voltage power source, but it is electrically grounded or a bias voltage of several tens to hundreds of volts is applied. Only by itself, the electrostatic latent image can be visualized by the developer 9.

【0016】機構的には現像装置7の内部に粉体トナー
などの現像剤を収納し、ドクターブレードなどの薄層化
手段10により導電性の現像剤供給ローラー8の表面で
前記現像剤9を薄層化し、図示しない駆動源により矢印
Bの方向に回転されて感光ドラム2の表面に形成された
静電潜像に現像剤を均一に接触させるものであり、従来
の技術とまったく同等のものを使うことができる。転写
帯電器11では、前記感光ドラム2の表面から一定の距
離をおいて平行に張架した転写ワイヤ12に高圧電源1
3により発生されるマイナス数キロボルトの高電圧を印
加し、コロナ放電を生じさせる。画像を記録するための
記録媒体15は、図示しない搬送手段により前記感光ド
ラム2の回転に同期して、感光ドラム2と転写帯電器1
1との間に給送され、前記転写帯電器11のコロナ放電
によりマイナスに帯電され、感光ドラム2の表面でプラ
スに帯電している現像剤画像を吸引して記録媒体15上
に転写する。前記転写帯電器において転写ワイヤ12を
囲むシールドプレート14は、コロナ放電を安定化さ
せ、前記記録媒体15上に均一に画像を転写させる作用
をする。上記の転写工程及び記録媒体も、従来の技術と
同等のものが使用できる。
Mechanically, a developer such as powder toner is stored inside the developing device 7, and the developer 9 is applied to the surface of the conductive developer supply roller 8 by a thinning means 10 such as a doctor blade. This is a thin layer, which is rotated in the direction of arrow B by a driving source (not shown) to uniformly contact the developer with the electrostatic latent image formed on the surface of the photosensitive drum 2. Can be used. In the transfer charger 11, the high voltage power source 1 is applied to the transfer wire 12 stretched in parallel at a certain distance from the surface of the photosensitive drum 2.
A high voltage of a few kilovolts generated by No. 3 is applied to cause corona discharge. The recording medium 15 for recording an image is synchronized with the rotation of the photosensitive drum 2 by a conveying unit (not shown), and the photosensitive drum 2 and the transfer charger 1 are synchronized with each other.
1 is fed to the recording medium 15 and is negatively charged by the corona discharge of the transfer charger 11, and the positively charged developer image on the surface of the photosensitive drum 2 is sucked and transferred onto the recording medium 15. The shield plate 14 surrounding the transfer wire 12 in the transfer charger functions to stabilize corona discharge and to transfer an image evenly onto the recording medium 15. The same transfer process and recording medium as in the conventional technique can be used.

【0017】記録媒体15上に転写された現像剤画像
は、従来通りの方法により定着させればよい。現像剤に
よる記録画像を記録媒体に転写した後感光ドラム2の表
面に残留している現像剤は、次の、クリーニング装置1
6により除去される。クリーニング装置16には、ウレ
タンゴムなどでできたクリーニングブレード17が内装
され、その先端は前記感光ドラム2の表面に当接して、
感光ドラム2の表面に残留している現像剤を機械的に掻
き取っている。クリーニングブレード17により掻き取
られた現像剤は、クリーニング装置16の現像剤貯留部
18に蓄積された後、廃棄、あるいは図示しない搬送手
段によって前記現像装置7に還流され再利用される。こ
のクリーニング装置の構造も、従来の技術とまったく同
等のものが使用できる。
The developer image transferred onto the recording medium 15 may be fixed by a conventional method. The developer remaining on the surface of the photosensitive drum 2 after the recording image by the developer is transferred to the recording medium is the cleaning device 1 described below.
Removed by 6. The cleaning device 16 includes a cleaning blade 17 made of urethane rubber or the like, the tip of which is in contact with the surface of the photosensitive drum 2,
The developer remaining on the surface of the photosensitive drum 2 is mechanically scraped. The developer scraped off by the cleaning blade 17 is accumulated in the developer storage portion 18 of the cleaning device 16 and then discarded, or is recycled to the developing device 7 by a conveying means (not shown) and is reused. The structure of this cleaning device may be the same as that of the conventional technique.

【0018】本実施例における電子写真印刷プロセスで
は、一様帯電電位がゼロ電位であるから、クリーニング
後の感光ドラム2の表面に多少の残留電位があっても一
次帯電の前に除電する必要がなく、クリーニング工程の
後そのまま次の画像形成プロセスに入ることができる。
上記の各工程を連続的に繰り返し行うことにより、記録
画像の形成を行う。
In the electrophotographic printing process of this embodiment, since the uniform charging potential is zero, even if there is some residual potential on the surface of the photosensitive drum 2 after cleaning, it is necessary to eliminate the charge before the primary charging. Instead, the next image forming process can be directly performed after the cleaning process.
A recorded image is formed by continuously repeating the above steps.

【0019】また、本実施例では、感光ドラムの基材に
印加する電圧を、プラス数百から千ボルトとしたが、基
材に印加する電圧をマイナス電圧とする場合には、感光
ドラムに塗布されている光導電性材料膜の構成を、図2
(b)に示すように、CGL層41′、CTL層4
2′、アルミ基材3の順に密着構造とすれば、感光ドラ
ム表面をゼロ電位に一様帯電した後、露光光源からの画
像光が表面のCGL層に照射されると、CGL層の内部
で発生した電荷対のうち、プラスの電荷はCTL層を通
過してアルミ基材のマイナス電荷に吸収され、同時に発
生したマイナスの電荷は表面に保持されてマイナス電荷
による静電潜像が形成されることになる。したがって、
その後のプロセスにおいて、現像ローラー及び転写帯電
器に印加する電圧の極性を反転させれば、まったく同様
の構成で画像形成プロセスを行うことができることにな
る。
Further, in this embodiment, the voltage applied to the base material of the photosensitive drum is set to a few hundreds to 1,000 volts, but when the voltage applied to the base material is a negative voltage, it is applied to the photosensitive drum. FIG. 2 shows the structure of the photoconductive material film that is used.
As shown in (b), the CGL layer 41 ′ and the CTL layer 4
If the contact structure is formed in the order of 2 ′ and the aluminum base material 3, the surface of the photosensitive drum is uniformly charged to zero potential, and then the image light from the exposure light source is irradiated on the surface of the CGL layer. Among the generated charge pairs, the positive charges pass through the CTL layer and are absorbed by the negative charges of the aluminum base material, and at the same time, the negative charges generated are held on the surface to form an electrostatic latent image by the negative charges. It will be. Therefore,
In the subsequent process, if the polarities of the voltages applied to the developing roller and the transfer charger are reversed, the image forming process can be performed with the same configuration.

【0020】また、現像バイアス電圧として、本実施例
では数十ないし百ボルト程度の電圧を印加させている
が、現像剤を薄層化させる手段において、現像剤自身の
摩擦帯電により必要なバイアス電圧を発生させることが
できるように、例えば、現像装置内部に現像剤撹拌また
は褶擦手段を設け、撹拌または褶擦による摩擦帯電によ
って現像剤自身が数十ないし百ボルト程度の電圧を発生
するようにして現像バイアス電圧を生成しても良い。
Further, as the developing bias voltage, a voltage of about several tens to hundreds of volts is applied in the present embodiment, but in the means for thinning the developer layer, the bias voltage required by frictional charging of the developer itself is applied. For example, a developer stirring or rubbing means is provided inside the developing device so that the developer itself generates a voltage of about several tens to hundreds of volts by frictional charging due to stirring or rubbing. To generate a developing bias voltage.

【0021】[0021]

【発明の効果】以上詳細に説明したように、本発明の電
子写真印刷プロセスを用いれば、数キロボルトを発生さ
せる極性の違う二種類の高圧電源を必要とせず転写帯電
器用に一種類のみで足りる。また、現像バイアス電圧と
して、本実施例では数十ないし百ボルト程度の電圧を印
加させているが、現像剤を薄層化させる手段において、
現像剤自身の摩擦帯電により必要なバイアス電圧を発生
させることができるように、例えば、現像装置内部に現
像剤撹拌または褶擦手段を設け、撹拌または褶擦による
摩擦帯電によって現像剤自身が数十ないし百ボルト程度
の電圧を発生するようにすれば、現像ローラーへ印加す
る電圧は不要となる。
As described in detail above, by using the electrophotographic printing process of the present invention, it is not necessary to use two kinds of high voltage power supplies having different polarities for generating several kilovolts, and only one kind is required for the transfer charger. . Further, as the developing bias voltage, a voltage of several tens to hundreds of volts is applied in the present embodiment, but in the means for thinning the developer,
In order to generate a necessary bias voltage by frictional charging of the developer itself, for example, a developer stirring or rubbing means is provided inside the developing device, and the developer itself is tens of tens by frictional charging by stirring or rubbing. If a voltage of about 100 volts is generated, the voltage applied to the developing roller becomes unnecessary.

【0022】また、一次帯電器も、コロナワイヤを必要
とせず、導電性のファーブラシなどは、ごく一般的に入
手できるものが使用できる。更に、除電用の光源も必要
なく、プロセスの構成がシンプルで、信頼性の高い電子
写真印刷装置を安価に提供することが可能となる。
Also, the primary charger does not require a corona wire, and a conductive fur brush or the like that is generally available can be used. Furthermore, since a light source for eliminating static electricity is not required, it is possible to provide a highly reliable electrophotographic printing apparatus with a simple process configuration at low cost.

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

【図1】本発明の電子写真印刷プロセス模式図FIG. 1 is a schematic diagram of an electrophotographic printing process of the present invention.

【図2】本発明の静電潜像形成工程模式図FIG. 2 is a schematic diagram of an electrostatic latent image forming process of the present invention.

【図3】従来の電子写真印刷プロセス模式図FIG. 3 is a schematic diagram of a conventional electrophotographic printing process.

【符号の説明】[Explanation of symbols]

2 感光ドラム 3 導電性基材 4 直流電源 5 一次帯電器 41 キャリヤ発生層 42 キャリヤ輸送層 2 Photosensitive drum 3 Conductive substrate 4 DC power source 5 Primary charger 41 Carrier generation layer 42 Carrier transport layer

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 光導電性材料の薄膜を表面に付着させた
画像担持体を回転させ、一次帯電、画像露光、現像の各
工程をこの順序で行い印刷画像の形成を行う電子写真印
刷装置において、 画像担持体の導電基材に連続的に電圧を印加された画像
担持体であることを特徴とする電子写真印刷装置。
1. An electrophotographic printing apparatus for forming a print image by rotating an image carrier having a thin film of a photoconductive material adhered on its surface, and performing steps of primary charging, image exposure and development in this order. An electrophotographic printing apparatus, which is an image carrier in which a voltage is continuously applied to a conductive base material of the image carrier.
【請求項2】 画像担持体の導電基材に印加する電圧
は、直流電圧であることを特徴とする請求項1記載の電
子写真印刷装置。
2. The electrophotographic printing apparatus according to claim 1, wherein the voltage applied to the conductive base material of the image carrier is a DC voltage.
【請求項3】 一次帯電器は、電気的に接地された導体
のブラシまたはフォーム材を、画像担持体表面に接触さ
せて行う除電器であることを特徴とする請求項1記載の
電子写真印刷装置。
3. The electrophotographic printing apparatus according to claim 1, wherein the primary charger is a static eliminator which is provided by bringing a conductive brush or foam material electrically grounded into contact with the surface of the image bearing member. apparatus.
JP4497193A 1993-03-05 1993-03-05 Electrophotographic printing device Pending JPH06258919A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4497193A JPH06258919A (en) 1993-03-05 1993-03-05 Electrophotographic printing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4497193A JPH06258919A (en) 1993-03-05 1993-03-05 Electrophotographic printing device

Publications (1)

Publication Number Publication Date
JPH06258919A true JPH06258919A (en) 1994-09-16

Family

ID=12706368

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4497193A Pending JPH06258919A (en) 1993-03-05 1993-03-05 Electrophotographic printing device

Country Status (1)

Country Link
JP (1) JPH06258919A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5568232A (en) * 1994-03-18 1996-10-22 Nec Corporation Image forming apparatus capable of removing toner fragments and shavings from a contact charging device by supplying a voltage to an image carrier to which the fragments and shavings are attracted

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5568232A (en) * 1994-03-18 1996-10-22 Nec Corporation Image forming apparatus capable of removing toner fragments and shavings from a contact charging device by supplying a voltage to an image carrier to which the fragments and shavings are attracted

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