JPH06202431A - Electrostatic charging device - Google Patents
Electrostatic charging deviceInfo
- Publication number
- JPH06202431A JPH06202431A JP34866692A JP34866692A JPH06202431A JP H06202431 A JPH06202431 A JP H06202431A JP 34866692 A JP34866692 A JP 34866692A JP 34866692 A JP34866692 A JP 34866692A JP H06202431 A JPH06202431 A JP H06202431A
- Authority
- JP
- Japan
- Prior art keywords
- charging
- voltage
- brush
- electrostatic charging
- potential
- 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
Landscapes
- Electrostatic Charge, Transfer And Separation In Electrography (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、例えば電子写真記録装
置の感光ドラムの表面を所定電位に均一帯電する帯電装
置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a charging device for uniformly charging the surface of a photosensitive drum of an electrophotographic recording device to a predetermined potential.
【０００２】[0002]
【従来の技術】電子写真記録装置における帯電装置とし
ては、一般的にスコロトロン帯電器が用いられている。
なぜならば、スコロトロン帯電器は帯電性能が高く、安
定的な帯電が行えるためである。2. Description of the Related Art A scorotron charger is generally used as a charging device in an electrophotographic recording apparatus.
This is because the scorotron charger has high charging performance and can perform stable charging.
【０００３】ところがこのスコロトロン帯電器は、例え
ば５００Ｖの帯電電位を得ようとした場合に５ｋＶ程度
と非常に高い電圧を必要とするため、経済性が悪い上に
安全性に問題がある。また、コロナ放電にともなってオ
ゾンが発生するため、このオゾンにより感光体や現像剤
を始めとした周囲の各種部位、さらには人体へ悪影響を
及ぼすおそれがある。However, this scorotron charger requires a very high voltage of about 5 kV when trying to obtain a charging potential of, for example, 500 V, which is not economical and has a problem in safety. Further, since ozone is generated along with the corona discharge, this ozone may adversely affect various peripheral parts such as the photoconductor and the developer as well as the human body.
【０００４】一方、比較的低い電圧で良く（例えば５０
０Ｖの帯電電位を得ようとした場合に０．５〜１ｋＶ程
度）、かつオゾンの発生もない接触帯電器がある。しか
しこの接触帯電器では、帯電性能が低いために均一な帯
電を行い難い。従って電子写真記録装置の場合、濃度ム
ラなどが生じることになり、画質を劣化させてしまうた
め適用し難い。On the other hand, a relatively low voltage is sufficient (for example, 50
There is a contact charger that does not generate ozone when it is desired to obtain a charging potential of 0 V (about 0.5 to 1 kV). However, with this contact charger, it is difficult to perform uniform charging due to its low charging performance. Therefore, in the case of an electrophotographic recording apparatus, uneven density or the like will occur, and the image quality will be deteriorated, which makes it difficult to apply.
【０００５】[0005]
【発明が解決しようとする課題】以上のように従来の帯
電装置は、スコロトロン帯電器を用いた場合には、経済
性が悪い上に安全性に問題がある。また接触帯電器を用
いた場合には、帯電性能に問題がある。As described above, the conventional charging device, when using a scorotron charger, is not economical and has a problem in safety. Further, when the contact charger is used, there is a problem in charging performance.
【０００６】本発明はこのような事情を考慮してなされ
たものであり、その目的とするところは、帯電性能を高
く保ったままで、経済性良くかつ安全性も高い帯電装置
を提供することにある。The present invention has been made in view of such circumstances, and an object thereof is to provide a charging device which is economical and highly safe while maintaining high charging performance. is there.
【０００７】[0007]
【課題を解決するための手段】本発明は、例えば感光ド
ラムなどの帯電対象に接触する状態で、前記帯電対象の
移動方向に沿って並んで配置した例えば回転ブラシなど
の複数の接触帯電子と、この複数の接触帯電子のそれぞ
れに帯電電圧を印加する複数の電源手段とを有し、前記
複数の接触帯電子のうちの前記帯電対象の移動方向最上
流に位置するものに対応する電源手段を除く他の電源手
段のそれぞれが対応する接触帯電子に印加する電圧を、
前記帯電対象の移動方向上流側に隣接する接触帯電子に
よる前記帯電対象の帯電電位との差が所定の帯電開始電
圧の絶対値以上となる所定値に設定した。SUMMARY OF THE INVENTION According to the present invention, a plurality of contact band electrons such as rotating brushes are arranged side by side along the moving direction of the charging target while being in contact with the charging target such as a photosensitive drum. And a plurality of power supply units for applying a charging voltage to each of the plurality of contact band electrons, the power supply unit corresponding to one of the plurality of contact band electrons located at the most upstream position in the moving direction of the charging target. The voltage applied to the corresponding contact band electrons by each of the other power supply means except
The difference from the charging potential of the charging target due to the contact band electrons adjacent to the upstream side in the moving direction of the charging target is set to a predetermined value that is equal to or more than the absolute value of the predetermined charging start voltage.
【０００８】[0008]
【作用】このような手段を講じたことにより、帯電対象
は、この帯電対象の移動方向に沿って並んで配置した複
数の接触帯電子のうちの前記帯電対象の移動方向最上流
に位置するものおよび当該接触帯電子に電圧を印加する
電源手段を除く他の接触帯電子および当該他の接触帯電
子に電圧を印加する他の電源手段によって、過剰な電荷
が除去される。By taking such means, the object to be charged is located at the most upstream of the moving direction of the object to be charged among the plurality of contact band electrons arranged side by side along the moving direction of the object to be charged. Excess charge is removed by the other contact band electrons and the other power supply unit that applies a voltage to the other contact band electrons, except the power supply unit that applies a voltage to the contact band electrons.
【０００９】[0009]
【実施例】以下、図面を参照して本発明の一実施例につ
き説明する。図１は本実施例に係る帯電装置を適用して
構成された電子写真記録装置の要部構成を一部破断して
示す図である。なおここでは、感光ドラムの帯電電位を
−５００Ｖとして説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a partially cutaway view showing the structure of an essential part of an electrophotographic recording apparatus configured by applying the charging device according to this embodiment. Note that, here, the charging potential of the photosensitive drum will be described as -500V.
【００１０】図中、１は感光ドラムであり、図示しない
駆動系によって図中の矢印イの方向に回転駆動されるも
のとなっている。この感光ドラム１の周囲にはこの感光
ドラム１に対向して、帯電装置２、露光装置３、現像装
置４、転写装置５およびクリーニング部６がそれぞれ設
けられている。In the figure, 1 is a photosensitive drum, which is driven to rotate in the direction of arrow a in the figure by a drive system (not shown). A charging device 2, an exposure device 3, a developing device 4, a transfer device 5, and a cleaning unit 6 are provided around the photosensitive drum 1 so as to face the photosensitive drum 1.
【００１１】このうち帯電装置２は、感光ドラム１に接
触する導電性回転ブラシである第１および第２帯電ブラ
シ２１，２２および第１帯電ブラシ２１に−１１００Ｖ
の電圧を印加する第１帯電電源２３と第２帯電ブラシ２
２に−１００Ｖの電圧を印加する第２帯電電源２４とよ
り構成されている。なお第１帯電ブラシ２１，２２は、
図示しない駆動系によって感光ドラム１の回転方向に対
してカウンタ方向（図中の矢印ロ，ハの方向）に回転駆
動されるものとなっている。Of these, the charging device 2 has -1100 V applied to the first and second charging brushes 21 and 22 and the first charging brush 21 which are conductive rotating brushes that contact the photosensitive drum 1.
First charging power source 23 and second charging brush 2 for applying the voltage
2 and a second charging power source 24 for applying a voltage of −100 V. The first charging brushes 21 and 22 are
A drive system (not shown) rotationally drives the photosensitive drum 1 in a counter direction (directions of arrows B and C in the figure) with respect to the rotational direction of the photosensitive drum 1.
【００１２】露光装置３は、具体的な構成の図示は省略
するが、例えばレーザ光などを記録すべき画像の画デー
タに応じてＯＮ／ＯＦＦする周知のレーザスキャナ等で
ある。The exposure device 3 is, for example, a well-known laser scanner which is turned on / off in accordance with image data of an image to be recorded, such as a laser beam, although its specific structure is not shown.
【００１３】現像装置４は、現像剤としてのトナー（図
示せず）を貯留したホッパー４１の開口部に、その一部
がホッパー４１の内部に位置する状態で円筒状の第１ス
リーブ４２を設けてなる。またホッパー４１の内部には
第１スリーブに平行に第２スリーブ４３を設ける。そし
て、第１，第２のスリーブ４２，４３には、現像バイア
ス用高圧電源４４が発生する負極性で所定電圧の現像バ
イアスが印加されている。４５はブレードであり、第１
のスリーブ４２に担持されてホッパー４１の外部へと導
かれるトナーの量を一定に保つためのものである。４６
はアジテータであり、ホッパー４１内のトナーの攪拌お
よび第１および第２のスリーブ４２，４３への搬送を行
うものである。なお、第１，第２のスリーブ４２，４３
およびアジテータ４６は、それぞれ図示しない駆動系に
よって図中の矢印ニ，ホ，ヘのそれぞれの方向に回転駆
動されるものとなっている。In the developing device 4, a cylindrical first sleeve 42 is provided at an opening of a hopper 41 which stores toner (not shown) as a developer, with a part thereof being located inside the hopper 41. It becomes. A second sleeve 43 is provided inside the hopper 41 in parallel with the first sleeve. The first and second sleeves 42 and 43 are applied with a developing bias of a predetermined voltage having a negative polarity generated by the developing bias high-voltage power supply 44. 45 is a blade, the first
The amount of toner carried on the sleeve 42 and guided to the outside of the hopper 41 is kept constant. 46
Is an agitator that stirs the toner in the hopper 41 and conveys the toner to the first and second sleeves 42 and 43. The first and second sleeves 42 and 43
The agitator 46 and the agitator 46 are driven to rotate in directions indicated by arrows d, e, and f in the drawing by driving systems (not shown).
【００１４】転写装置５は、放電器５１およびこの放電
器５１に正極性で所定電圧の転写電圧を印加する転写用
高圧電源５２より構成された周知のコロトロン方式の帯
電器となっている。クリーニング部６は、感光ドラム１
に付着したトナーを掻き落として回収するものである。The transfer device 5 is a well-known corotron type charger including a discharger 51 and a high-voltage power supply 52 for transfer which applies a transfer voltage having a positive polarity and a predetermined voltage to the discharger 51. The cleaning unit 6 includes the photosensitive drum 1.
The toner adhered to is scraped off and collected.
【００１５】次に以上のように構成された電子写真記録
装置の動作を説明する。この電子写真記録装置では、基
本的には周知の反転現像方式の電子写真記録プロセスに
準じて記録が行われるが、トナーの記録紙への転写終了
後における処理が異なっている。以下、この点につき説
明する。Next, the operation of the electrophotographic recording apparatus configured as described above will be described. In this electrophotographic recording apparatus, recording is basically performed according to a well-known reversal development type electrophotographic recording process, but the processing after the transfer of toner to recording paper is different. Hereinafter, this point will be described.
【００１６】まず、転写装置５での転写位置を通過した
感光ドラム１の表面電位は、例えば図２に示すように０
Ｖ程度となっている。ただし、このときの表面電位は、
前工程での露光部分であるか非露光部分であるか、ある
いは転写装置５での転写高圧の影響などにより、部分に
よってまちまちである。First, the surface potential of the photosensitive drum 1 which has passed the transfer position in the transfer device 5 is 0 as shown in FIG.
It is about V. However, the surface potential at this time is
It may be an exposed portion or a non-exposed portion in the previous step, or may vary depending on the portion due to the influence of the transfer high voltage in the transfer device 5.
【００１７】感光ドラム１は第１帯電ブラシ２１を通過
する際に、第１帯電ブラシ２１に印加された−１１００
Ｖの電圧により帯電される。ここで第１帯電ブラシ２１
に印加する電圧と感光ドラム１の帯電電位との間には、
図３に示すような関係がある。すなわち、第１帯電ブラ
シ２１への印加電圧がある値（以下、帯電開始電圧と称
する）以下であると、第１帯電ブラシ２１から感光ドラ
ム１への放電が生じず、感光ドラム１の帯電は行われな
い。そして第１帯電ブラシ２１への印加電圧が帯電開始
電圧以上であれば、第１帯電ブラシ２１から感光ドラム
１への放電が生じ、電圧値に比例した電位に感光ドラム
１が帯電される。なお、以下の条件で実測したところ、
帯電開始電圧は−４５０Ｖとなった。When the photosensitive drum 1 passes through the first charging brush 21, it is applied to the first charging brush 21 by -1100.
It is charged by the voltage of V. Here, the first charging brush 21
Between the voltage applied to the photosensitive drum 1 and the charging potential of the photosensitive drum 1,
There is a relationship as shown in FIG. That is, when the voltage applied to the first charging brush 21 is less than a certain value (hereinafter, referred to as a charging start voltage), discharge from the first charging brush 21 to the photosensitive drum 1 does not occur, and the photosensitive drum 1 is charged. Not done When the voltage applied to the first charging brush 21 is equal to or higher than the charging start voltage, discharge from the first charging brush 21 to the photosensitive drum 1 occurs, and the photosensitive drum 1 is charged to a potential proportional to the voltage value. In addition, when actually measured under the following conditions,
The charging start voltage was -450V.
【００１８】１．感光ドラム１ (1) 材質…ＯＰＣ（organic photoconductor）ドラム (2) 回転速度…３１．２mm/sec ２．転写装置５ (1) 転写方式…コロトロン放電 (2) 転写電流…１１０μＡ ３．第１帯電ブラシ２１ (1) 材質…Rec ACT （ユニチカ社製、レーヨン系導電繊
維にカーボンを分散させたもの） (2) 比抵抗…１０5 〜１０6 Ω・cm (3) 太さ…６デニール (4) 密度…１０5 本／inch2 (5) 外径…φ１８mm (6) 毛足長…３．０mm (7) くいこみ量…０．５mm (8) 回転速度…１８．７mm/sec1. Photosensitive drum 1 (1) Material: OPC (organic photoconductor) drum (2) Rotation speed: 31.2 mm / sec 2. Transfer device 5 (1) Transfer method: Corotron discharge (2) Transfer current: 110 μA 3. 1st charging brush 21 (1) Material ... Rec ACT (Unitika's, rayon-based conductive fiber with carbon dispersed) (2) Specific resistance ... 10 5 -10 6 Ω ・ cm (3) Thickness… 6 denier (4) Density… 10 5 Book / inch 2 (5) Outer diameter: φ18 mm (6) Hair length: 3.0 mm (7) Dip amount: 0.5 mm (8) Rotation speed: 18.7 mm / sec
【００１９】かくして感光ドラム１の表面電位は、第１
帯電ブラシ２１を通過した後には例えば図４に示すよう
に−５８０Ｖとなる。なお第１帯電ブラシ２１への印加
電圧は、第１帯電ブラシ２１を通過したのちの感光ドラ
ム１の表面電位が目標とする帯電電位（ここでは−５０
０Ｖ）よりも高電位（ここでは−５８０Ｖ）となる値
（ここでは−１１００Ｖ）に設定する。すなわち、第１
帯電ブラシ２１により感光ドラム１の表面電位を目標と
する帯電電位よりも一度高くする。このときには、感光
ドラム１の表面電位の変動幅は低減されているが、まだ
７０Ｖ以上と大きい。Thus, the surface potential of the photosensitive drum 1 is the first
After passing through the charging brush 21, it becomes −580 V as shown in FIG. 4, for example. The voltage applied to the first charging brush 21 is a target charging potential (here, −50 in this case) that is the target surface potential of the photosensitive drum 1 after passing through the first charging brush 21.
The potential is set to a value (-1100 V here) that is higher than 0 V (-580 V here). That is, the first
By the charging brush 21, the surface potential of the photosensitive drum 1 is once made higher than the target charging potential. At this time, the fluctuation range of the surface potential of the photosensitive drum 1 is reduced, but it is still large at 70 V or more.
【００２０】続いて感光ドラム１の表面電位が−５８０
Ｖとされた部分は、第２帯電ブラシ２２を通過する。こ
の際、第２帯電ブラシ２２に印加されている電圧は−１
００Ｖであり、感光ドラム１の表面電位と第２帯電ブラ
シ２２との電位差は４８０Ｖであり、帯電開始電圧より
も高い。帯電開始電圧は放電が生じる最低電圧であるか
ら、高電位である感光ドラム１の表面から第２帯電ブラ
シ２２への放電が生じる。これにより感光ドラム１の表
面電位は、図５に示すように−５００Ｖまで低減され
る。なおこの際には、感光ドラム１の表面電位の変動幅
は、１２Ｖ程度に抑えられる。Then, the surface potential of the photosensitive drum 1 is -580.
The portion designated as V passes through the second charging brush 22. At this time, the voltage applied to the second charging brush 22 is -1.
The potential difference between the surface potential of the photosensitive drum 1 and the second charging brush 22 is 480V, which is higher than the charging start voltage. Since the charging start voltage is the lowest voltage at which discharge is generated, discharge from the surface of the photosensitive drum 1 having a high potential to the second charging brush 22 occurs. As a result, the surface potential of the photosensitive drum 1 is reduced to -500V as shown in FIG. At this time, the fluctuation range of the surface potential of the photosensitive drum 1 is suppressed to about 12V.
【００２１】以上のように本実施例によれば、第１帯電
ブラシ２１によって感光ドラム１の表面電位を目標とす
る帯電電位（−５００Ｖ）よりも高電位（−５８０Ｖ）
に、すなわち過剰に帯電したのち、第２帯電ブラシ２２
によって過剰な電荷を除去することによって、感光ドラ
ム１の帯電電位が目標電位に調節される。換言すれば、
第１帯電ブラシ２１によって大雑把な帯電が行われたの
ち、第２帯電ブラシ２２によって感光ドラム１の帯電電
位が微小に補正される。従って、必要とする電圧は−１
１００Ｖおよび−１００Ｖと低電圧ながら、感光ドラム
１を安定的に帯電できる。またコロナ放電は行っていな
いから、オゾンの発生もない。As described above, according to the present embodiment, the potential of the surface of the photosensitive drum 1 by the first charging brush 21 is higher than the target charging potential (-500V) (-580V).
To the second charging brush 22 after being excessively charged.
By removing the excess charge by, the charging potential of the photosensitive drum 1 is adjusted to the target potential. In other words,
After the rough charging by the first charging brush 21, the charging potential of the photosensitive drum 1 is finely corrected by the second charging brush 22. Therefore, the required voltage is -1
The photosensitive drum 1 can be stably charged while the voltage is as low as 100V and -100V. Moreover, since no corona discharge is performed, no ozone is generated.
【００２２】なお本発明は上記実施例に限定されるもの
ではない。例えば上記実施例では、本発明に係る帯電装
置を電子写真記録装置に適用し、感光ドラムの帯電を行
うものとしているが、帯電対象は感光ドラムには限定さ
れず、任意の対象であって良く、電子写真記録装置以外
への適用も可能である。The present invention is not limited to the above embodiment. For example, in the above embodiment, the charging device according to the present invention is applied to the electrophotographic recording device to charge the photosensitive drum. However, the charging target is not limited to the photosensitive drum and may be any target. It is also possible to apply to other than the electrophotographic recording device.
【００２３】また上記実施例では、第１帯電ブラシ２１
および第２帯電ブラシ２２に直流電圧を印加している
が、図６に示すような直流分に交流分を重畳した電圧を
印加しても良い。このようにすると、帯電開始電圧を低
下させることができ（交流分のピーク間電圧Ｖｐ−ｐを
上げるほど顕著）、また帯電電位の変動幅を小さくでき
る。また各種電圧値は上記実施例に挙げたものには限定
されず、装置での種々の条件に応じて任意に設定可能で
ある。In the above embodiment, the first charging brush 21 is used.
Although a DC voltage is applied to the second charging brush 22, a voltage in which an AC component is superimposed on a DC component as shown in FIG. 6 may be applied. By doing so, the charging start voltage can be lowered (prominent as the peak-to-peak voltage Vp-p of the AC component is increased), and the fluctuation range of the charging potential can be reduced. Further, various voltage values are not limited to those listed in the above embodiment, and can be arbitrarily set according to various conditions in the device.
【００２４】また上記実施例では、接触帯電子として回
転ブラシを用いているが、固定ブラシであっても良い
し、あるいは導電性ブレードやローラのようなブラシ以
外のものであっても良い。また上記実施例では、接触帯
電子の数を２つとしているが、３つ以上設けても良い。
このほか、本発明の要旨を逸脱しない範囲で種々の変形
実施が可能である。In the above embodiment, a rotating brush is used as the contact band electrons, but a fixed brush may be used, or a brush other than a conductive blade or roller may be used. Further, in the above embodiment, the number of contact band electrons is two, but three or more may be provided.
In addition, various modifications can be made without departing from the scope of the present invention.
【００２５】[0025]
【発明の効果】本発明によれば、例えば感光ドラムなど
の帯電対象に接触する状態で、前記帯電対象の移動方向
に沿って並んで配置した例えば回転ブラシなどの複数の
接触帯電子と、この複数の接触帯電子のそれぞれに帯電
電圧を印加する複数の電源手段とを有し、前記複数の接
触帯電子のうちの前記帯電対象の移動方向最上流に位置
するものに対応する電源手段を除く他の電源手段のそれ
ぞれが対応する接触帯電子に印加する電圧を、前記帯電
対象の移動方向上流側に隣接する接触帯電子による前記
帯電対象の帯電電位との差が所定の帯電開始電圧の絶対
値以上となる所定値に設定したので、帯電性能を高く保
ったままで、経済性良くかつ安全性も高い帯電装置とな
る。According to the present invention, a plurality of contact band electrons such as a rotating brush, which are arranged side by side along the moving direction of the charging target while being in contact with the charging target such as a photosensitive drum, are provided. A plurality of power supply means for applying a charging voltage to each of the plurality of contact band electrons, excluding a power supply means corresponding to one of the plurality of contact band electrons located at the most upstream side in the moving direction of the charging target. The difference between the voltage applied to the corresponding contact band electrons by each of the other power supply means and the charging potential of the charging target by the contact band electrons adjacent on the upstream side in the moving direction of the charging target is the absolute value of the predetermined charging start voltage. Since the predetermined value which is equal to or higher than the value is set, the charging device can be economically and highly safe while keeping the charging performance high.
【図１】 本発明の一実施例に係る帯電装置を適用して
構成された電子写真記録装置の要部構成を一部破断して
示す図。FIG. 1 is a partially cutaway view showing the structure of an essential part of an electrophotographic recording apparatus configured by applying a charging device according to an exemplary embodiment of the present invention.
【図２】 図１に示す電子写真記録装置の動作状態を模
式的に示す図。FIG. 2 is a diagram schematically showing an operating state of the electrophotographic recording apparatus shown in FIG.
【図３】 第１帯電ブラシ２１への印加電圧と感光ドラ
ム１の表面電位との関係を示す図。FIG. 3 is a diagram showing a relationship between a voltage applied to the first charging brush 21 and a surface potential of the photosensitive drum 1.
【図４】 図１に示す電子写真記録装置の動作状態を模
式的に示す図。FIG. 4 is a diagram schematically showing an operating state of the electrophotographic recording apparatus shown in FIG.
【図５】 図１に示す電子写真記録装置の動作状態を模
式的に示す図。5 is a diagram schematically showing an operating state of the electrophotographic recording apparatus shown in FIG.
【図６】 第１帯電ブラシ２１および第２帯電ブラシ２
２への印加電圧の変形例を示す図。FIG. 6 shows a first charging brush 21 and a second charging brush 2.
The figure which shows the modification of the applied voltage to 2.
１…感光ドラム、２…帯電装置、２１…第１帯電ブラ
シ、２２…第２帯電ブラシ、２３…第１帯電電源、２４
…第２帯電電源、３…露光装置、４…現像装置、５…転
写装置、６…クリーニング部。DESCRIPTION OF SYMBOLS 1 ... Photosensitive drum, 2 ... Charging device, 21 ... 1st charging brush, 22 ... 2nd charging brush, 23 ... 1st charging power supply, 24
... second charging power source, 3 ... exposure device, 4 ... developing device, 5 ... transfer device, 6 ... cleaning unit.
Claims (1)
定電位に帯電する帯電装置において、 前記帯電対象に接触する状態で、前記帯電対象の移動方
向に沿って並んで配置された複数の接触帯電子と、 この複数の接触帯電子のそれぞれに帯電電圧を印加する
複数の電源手段とを有し、 前記複数の接触帯電子のうちの前記帯電対象の移動方向
最上流に位置するものに対応する電源手段を除く他の電
源手段のそれぞれが対応する接触帯電子に印加する電圧
は、前記帯電対象の移動方向上流側に隣接する接触帯電
子による前記帯電対象の帯電電位との差が所定の帯電開
始電圧の絶対値以上となる値に設定してなることを特徴
とする帯電装置。1. A charging device for charging a surface of a charging target that moves in a predetermined direction to a predetermined potential, wherein a plurality of contacts arranged in a line along the moving direction of the charging target while being in contact with the charging target. It corresponds to one of the plurality of contact band electrons that is located at the most upstream side in the moving direction of the charging target, and that has a plurality of power supply units that apply a charging voltage to each of the plurality of contact band electrons. The voltage applied to the corresponding contact zone electrons by each of the other power source means other than the power source means has a predetermined difference from the charging potential of the charging target due to the contact zone electrons adjacent on the upstream side in the moving direction of the charging target. A charging device characterized by being set to a value which is equal to or higher than an absolute value of a charging start voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34866692A JPH06202431A (en) | 1992-12-28 | 1992-12-28 | Electrostatic charging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34866692A JPH06202431A (en) | 1992-12-28 | 1992-12-28 | Electrostatic charging device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06202431A true JPH06202431A (en) | 1994-07-22 |
Family
ID=18398544
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP34866692A Pending JPH06202431A (en) | 1992-12-28 | 1992-12-28 | Electrostatic charging device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06202431A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08328360A (en) * | 1995-05-31 | 1996-12-13 | Fuji Xerox Co Ltd | Electrifying method |
| JP2009294344A (en) * | 2008-06-04 | 2009-12-17 | Konica Minolta Business Technologies Inc | Image forming apparatus |
| JP2017026679A (en) * | 2015-07-16 | 2017-02-02 | コニカミノルタ株式会社 | Image forming apparatus |
-
1992
- 1992-12-28 JP JP34866692A patent/JPH06202431A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08328360A (en) * | 1995-05-31 | 1996-12-13 | Fuji Xerox Co Ltd | Electrifying method |
| JP2009294344A (en) * | 2008-06-04 | 2009-12-17 | Konica Minolta Business Technologies Inc | Image forming apparatus |
| JP2017026679A (en) * | 2015-07-16 | 2017-02-02 | コニカミノルタ株式会社 | Image forming apparatus |
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