JPH0658560B2 - Corona charger - Google Patents
Corona chargerInfo
- Publication number
- JPH0658560B2 JPH0658560B2 JP60054657A JP5465785A JPH0658560B2 JP H0658560 B2 JPH0658560 B2 JP H0658560B2 JP 60054657 A JP60054657 A JP 60054657A JP 5465785 A JP5465785 A JP 5465785A JP H0658560 B2 JPH0658560 B2 JP H0658560B2
- Authority
- JP
- Japan
- Prior art keywords
- shield case
- corona
- case
- side wall
- corona charger
- 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.)
- Expired - Lifetime
Links
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/02—Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices
- G03G15/0291—Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices corona discharge devices, e.g. wires, pointed electrodes, means for cleaning the corona discharge device
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、コロナ帯電器に関するもので、より詳細に
は、電子写真感光体のような被帯電体のコロナ帯電を、
横方向の中央部においても、両端部においても一様に行
うための改良に関する。TECHNICAL FIELD The present invention relates to a corona charger, and more specifically, to corona charging of an object to be charged such as an electrophotographic photoreceptor.
The present invention relates to an improvement for uniformly performing both in the lateral central portion and both end portions.
（従来の技術及び発明の技術的課題） 電子写真複写機における感光体の帯電（除電も帯電の１
種である）には、コロナ帯電器が広く使用されている。
このコロナ帯電器は、帯電用開口部を有し断面形状がコ
の字型の金属製シールドケイスと該シールドケース内に
張架されたコロナワイヤーとから成っている。このコロ
ナ帯電器は、感光体ドラムの周囲に配置され、画像露光
前の一様帯電、感光体トナー像の静電的転写、転写紙の
分離、及びトナー転写後の感光体の除電クリーニング等
に用いられている。(Prior Art and Technical Problem of Invention) Charging of Photoreceptor in Electrophotographic Copying Machine
Corona charger is widely used.
This corona charger is composed of a metal shield case having a U-shaped cross section and a corona wire stretched in the shield case. This corona charger is placed around the photoconductor drum and is used for uniform charging before image exposure, electrostatic transfer of the photoconductor toner image, separation of transfer paper, and charge removal cleaning of the photoconductor after toner transfer. It is used.
しかしながら、画像露光前の一様帯電用のコロナ帯電器
においては感光体ドラムの表面電位を増大させるために
印加電位を増大させたり、或いは感光体ドラムの周速を
増大させる場合には、感光体ドラムの横方向の表面電位
にかなりのバラツキが認められ、このバラツキはドラム
中央部では電位が高く、その両端部では電位が低く、そ
の電位差は５０乃至６０ボルトにも達することがわかっ
た。However, in a corona charger for uniform charging before image exposure, when the applied potential is increased to increase the surface potential of the photoconductor drum or the peripheral speed of the photoconductor drum is increased, It was found that a considerable variation was observed in the surface potential in the lateral direction of the drum, and the variation was high at the center of the drum and low at both ends thereof, and the potential difference reached 50 to 60 volts.
また、感光体ドラムの周方向の表面電位にもバラツキが
認められた。この原因は、コロナ放電によりイオン風が
発生し、またドラム回転によって起る気流やフアン等に
よる気流が、このコロナイオン風と干渉しあい、そのた
め帯電ムラが発生するものと思われる。Also, variations were observed in the surface potential of the photosensitive drum in the circumferential direction. It is considered that this is because ion wind is generated by the corona discharge, and the air flow caused by the rotation of the drum and the air flow by the fan and the like interfere with the corona ion wind, resulting in uneven charging.
（発明の目的） 従って、本発明の目的は、感光体等の被帯電体の帯電ム
ラが解消され、一様でしかも高電位への帯電が可能とな
るコロナ帯電器を提供するにある。(Object of the Invention) Accordingly, it is an object of the present invention to provide a corona charger which eliminates uneven charging of an object to be charged such as a photoconductor and which can be uniformly charged to a high potential.
本発明の他の目的は、同じ印加電圧で比較して、被帯電
体の表面電位を高くすることが可能であると共に、横方
向において、中央部の帯電電位が両端部より高くなるの
を防止し、帯電電位の分布を一様にすることが可能なコ
ロナ帯電器を提供するにある。Another object of the present invention is to make it possible to increase the surface potential of the body to be charged as compared with the same applied voltage, and to prevent the charge potential of the central portion from becoming higher than both end portions in the lateral direction. However, it is another object of the present invention to provide a corona charger that can make the distribution of the charging potential uniform.
本発明の更に他の目的は、シールドケース内に気流が入
り、これによりケース内で乱流を生じるのを有効に防止
し、安定なコロナ帯電操作を行い得るコロナ帯電器を提
供するにある。Still another object of the present invention is to provide a corona charger capable of effectively preventing a turbulent flow in the case caused by an air flow entering the shield case and performing a stable corona charging operation.
（発明の構成） 本発明によれば、帯電用開口部を有する金属製シールド
ケースと、該シールドケース内に張架されたコロナワイ
ヤーとから成るコロナ帯電器において、該シールドケー
スの被帯電体送出側の側壁部内面に、下端縁が該側壁の
開口端とほぼ一致し、且つ上端縁がケース中央部におい
て低くケース両端部において高い凹形状を有する電気絶
縁部材を設けたことを特徴とするコロナ帯電器が提供さ
れる。(Structure of the Invention) According to the present invention, in a corona charger comprising a metal shield case having a charging opening and a corona wire stretched in the shield case, the charged body of the shield case is delivered. A corona is provided on the inner surface of the side wall portion on the side of the side wall, the lower end edge of which is substantially coincident with the opening end of the side wall, and the upper end edge of which is low at the center of the case and high at both ends of the case. A charger is provided.
本発明によればまた、帯電用開口部を有する金属製シー
ルドケースと、該シールドケース内に張架されたコロナ
ワイヤーとから成るコロナ帯電器において、該シールド
ケースの被帯電体送出側の側壁部内面に、下端縁が該側
壁の開口端とほぼ一致し、且つ上端縁がケース中央部に
おいて低くケース両端部において高い凹形状を有する電
気絶縁部材を設け且つ被帯電体導入側側壁部の開口端に
小間隔の内方向折曲部を形成したことを特徴とするコロ
ナ帯電器が提供される。Further, according to the present invention, in a corona charger including a metal shield case having a charging opening and a corona wire stretched in the shield case, a side wall portion of the shield case on a side to which a body to be charged is delivered. An inner surface is provided with an electrically insulating member having a lower edge substantially coincident with the opening end of the side wall and an upper edge having a concave shape that is low at the center of the case and high at both ends of the case, and the opening end of the side wall of the body to be charged is introduced. There is provided a corona charger characterized in that inwardly bent portions are formed at small intervals.
（発明の実施態様） 本発明を添付図面に示す具体例に基づいて以下に詳細に
説明する。BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below in detail based on specific examples shown in the accompanying drawings.
本発明のコロナ帯電器を開口端を上側として示す第１図
及びこの帯電器を感光ドラムと共に断面で示す第２図に
おいて、このコロナ帯電器は全体として１で示す金属製
シールドケース１４と、このケース内に張架されたコロ
ナワイヤー２とから成っている。このシールドケース１
４の両端には、電気絶縁性の支持具３ａ，３ｂが設けら
れ、その一方３ａにはプラグ等の電源への接続部材４が
設けられ、その他方３ｂにはコイルスプリング等の張力
部材５が設けられ、これらの間にコロナワイヤー２は一
定の張力下に架設されている。In FIG. 1 showing the corona charger of the present invention with its open end on the upper side and in FIG. 2 showing this charger together with the photosensitive drum in cross section, this corona charger is a metal shield case 14 generally designated by 1, It consists of a corona wire 2 suspended in a case. This shield case 1
Electrically insulating supports 3a and 3b are provided at both ends of 4, and a connecting member 4 for connecting to a power source such as a plug is provided on one side 3a, and a tension member 5 such as a coil spring is provided on the other 3b. The corona wire 2 is installed between them under a constant tension.
シールドケース１４は、被帯電体（感光体）１２の導入
側の側壁部６と送出側の側壁部７とを有しているが、本
発明によれば、この送出側の側壁部７の内面に電気絶縁
部材８を、以下に詳述する位置関係で設ける。即ち、こ
の電気絶縁部材８は、第３−Ａ図に示す通りポリエチレ
ンテレフタレート等の電気絶縁性樹脂フイルムから成っ
ており、ストレートな下端縁９と、両端部において高く
且つ中央部において低い凹形状の上端縁１０とを有して
いる。この電気絶縁部材８を、シールドケース１４の送
出側の側壁部７の内面に対して、その下端縁９が開口端
１１と一致するように貼合せる。The shield case 14 has the side wall portion 6 on the introduction side of the member to be charged (photoconductor) 12 and the side wall portion 7 on the delivery side. According to the present invention, the inner surface of the side wall portion 7 on the delivery side. The electric insulating member 8 is provided in the positional relationship described in detail below. That is, the electric insulating member 8 is made of an electric insulating resin film such as polyethylene terephthalate as shown in FIG. 3-A, and has a straight lower edge 9 and a concave shape that is high at both ends and low at the center. It has an upper edge 10. The electrical insulating member 8 is attached to the inner surface of the side wall portion 7 on the delivery side of the shield case 14 so that the lower end edge 9 thereof coincides with the opening end 11.
このような形状の電気絶縁性部材８をシールドケース１
４の送出側の側壁部７内面に設けることにより、該内面
にはケース中央部では導電性表面積が大で、両端部では
導電性表面積が小となるような導電性表面の分布が形成
され、その結果として、中央部ではシールドへの流れ込
み電流を大、両端部ではシールドへの流れ込み電流を小
とすることが可能となる。The electrically insulating member 8 having such a shape is used as the shield case 1
By providing on the inner surface of the side wall portion 7 on the delivery side of 4, the conductive surface distribution is formed on the inner surface such that the conductive surface area is large at the center of the case and small at both ends. As a result, it is possible to make the current flowing into the shield large at the central portion and make the current flowing into the shield small at both end portions.
本発明によれば、この構成により、感光体１２への帯電
ムラが解消され、一様でしかも高電位への帯電が可能と
なる。第４図は、感光体ドラム１２の左端縁から右端縁
の距離を６等分して、感光体ドラム１２に導体を貼合
せ、この各導体への流れ込み電流を実測した結果を示す
ものであり、横軸は各導体の左端縁からの番号を、縦軸
は流れ込み電流値（ＭＡ）を示す。また、プロットＡ
は、本発明に従い電気絶縁性部材を貼付けた帯電器のも
のであり、プロットＢは電気絶縁性部剤を貼付けない以
外は全く同様の帯電器についてのデータである。第４図
の結果から、通常の帯電器ではコロナ放電による導体へ
の流れ込み電流が両端部において低く且つ中央部で高く
なる分布を示すのに対して、本発明においては、コロナ
放電時の導体への流れ込み電流値を、従来のそれに比し
て十分に高く、しかも両端部においても中央部において
も一様な値に維持し得ることが明白である。According to the present invention, this configuration eliminates uneven charging of the photoconductor 12 and enables uniform charging to a high potential. FIG. 4 shows the result of measuring the inflow current into each conductor by dividing the distance from the left end edge to the right end edge of the photoconductor drum 12 into 6 equal parts and bonding the conductors to the photoconductor drum 12. The horizontal axis represents the number from the left end edge of each conductor, and the vertical axis represents the flow-in current value (MA). Also, plot A
Is for a charger to which an electrically insulating member is adhered according to the present invention, and Plot B is data for a charger which is completely the same except that the electrically insulating member is not adhered. The results shown in FIG. 4 show that in a normal charger, the current flowing into the conductor due to corona discharge has a distribution that it is low at both ends and high at the center, whereas in the present invention, the current flowing to the conductor during corona discharge It is obvious that the inflow current value of 1 is sufficiently higher than that of the conventional one, and can be maintained at a uniform value at both ends and the center.
また、実際にセレン感光ドラムを使用し、プラス6.65Ｋ
Ｖの電圧を印加してコロナ放電による帯電を行った結果
でも、通常の帯電器の場合には、前述した６つのポイン
トで、表面電位が５８０乃至６６０Ｖの範囲にバラツク
のに対して、本発明の帯電器の場合には７４０乃至７６
０Ｖの範囲で均一化していることが認められた。Also, using a selenium photosensitive drum, plus 6.65K
Even in the result of charging by corona discharge by applying a voltage of V, in the case of an ordinary charger, the surface potential varies in the range of 580 to 660 V at the above-mentioned six points, whereas the present invention 740 to 76 for the charger
It was confirmed that the voltage was homogenized in the range of 0V.
更に、グレイ原稿の高速複写に際し、通常の帯電器を使
用した場合には、複写物中央に黒蛇状の画像ムラや、ま
た全面にわたってウロコ状の画像ムラが屡々発生するこ
とが認められる。この黒蛇状の画像ムラは、帯電器中央
にイオン風が片寄り、その部分の帯電が異状に高く行わ
れることによるものであり、またウロコ状の画像ムラは
イオン風と帯電器内に吹込まれる気流とが干渉し合って
生ずる偏流による帯電ムラに起因するものと思われる
が、本発明によれば、前述したシールドへの流れ込み電
流の分布を与えることにより、グレイ原稿の複写に際し
ても、黒蛇状或いはウロコ状の画像ムラの発生を有効に
防止できる。Furthermore, when a normal charger is used during high-speed copying of a gray original, it is often observed that a black snake-like image unevenness is generated in the center of the copy, or a scale-like image unevenness is generated over the entire surface. This black snake-shaped image unevenness is due to the ion wind being biased toward the center of the charger, and the charging in that part is abnormally high. It is considered that this is caused by uneven charging due to uneven flow caused by the interference with the flow of air. However, according to the present invention, by giving the distribution of the current flowing into the shield described above, even when copying a gray original, It is possible to effectively prevent the occurrence of black snake-like or scale-like image unevenness.
例えば第１図に示されている絶縁性部材８の形状とは逆
に、両端部分での高さが高く且つ中央部分での高さが低
い形状の絶縁性部材をコロナ帯電器に設けて、グレイ原
稿の高速複写を行った場合には、黒蛇状あるいはウロコ
状の画像ムラが発生した。For example, contrary to the shape of the insulating member 8 shown in FIG. 1, the corona charger is provided with an insulating member having a shape in which the height at both end portions is high and the height at the central portion is low. When high-speed copying of a gray original was performed, black snake-like or scale-like image unevenness occurred.
電気絶縁性部材８の形状は、第３−Ａ図に示す通り、上
端縁１０が円弧状のものであってもよいし、また第３−
Ｂ図に示す通り、倒立三角形状のもの、或いは第３−Ｃ
図に示す通り倒立台形状のものであってもよい。両端部
における高さh1に対する中央部における高さh2の比（h2
／h1）は、一般に0.05乃至0.95特に0.4乃至0.8の範囲内
にあることが望ましい。この部材８は、樹脂フイルム形
で接着により施すことが有利であるが、粉体或いは溶液
等の形で電気絶縁性樹脂を施し得ることも当然である。The electrically insulating member 8 may have a shape in which the upper edge 10 has an arc shape as shown in FIG.
As shown in Fig. B, inverted triangle or 3-C
It may have an inverted trapezoidal shape as shown in the figure. Ratio of height h 2 at the center to height h 1 at both ends (h 2
/ H 1 ) is preferably in the range of generally 0.05 to 0.95, especially 0.4 to 0.8. It is advantageous to apply the member 8 in the form of a resin film by adhesion, but it goes without saying that the electrically insulating resin may be applied in the form of powder or solution.
本発明の最も好適な態様によれば、以上説明した通り、
送出側の側壁部７内面に電気絶縁部材８を設けると共
に、第５図に示す通り被帯電体の導入の側壁部６の開口
端に小間隔の内方向折曲部１３を形成させる。According to the most preferable aspect of the present invention, as described above,
An electrically insulating member 8 is provided on the inner surface of the side wall portion 7 on the delivery side, and as shown in FIG. 5, inwardly bent portions 13 are formed at a small interval at the opening end of the side wall portion 6 for introducing the member to be charged.
この内方向折曲部１１を形成させることにより、ドラム
１２の回転に伴う風が帯電器（シールドケース）内に入
るのが有効に防止され、その結果としてコロナ風の乱れ
等による帯電ムラも著しく改善されることがわかった。
内方向折曲部１１の間隔は一般に0.5乃至５mm、特に１
乃至３mmの範囲内にあるのが望ましい。By forming the inwardly-bent portion 11, the wind caused by the rotation of the drum 12 is effectively prevented from entering the charger (shield case), and as a result, the charging unevenness due to the disturbance of the corona wind or the like is remarkable. It turned out to be improved.
The distance between the inward bent portions 11 is generally 0.5 to 5 mm, especially 1
It is desirable to be within the range of 3 mm.
（発明の作用効果） 本発明によれば、イオン風或いは吹込む風の影響を受け
易い被帯電体送出側のシールドケース内面に、前述した
形状の電気絶縁部材を設けることにより、中央部でのシ
ールドへの流れ込み電流が、両端部でのシールドへの流
れ込み電流より大となる分布を与え、これにより帯電ム
ラを解消し、一様でしかも高電位への帯電が可能とな
る。更に被帯電体導入側端部に内方向折曲部を形成する
ことにより、シールドケース内への被帯電体搬送気流の
流入を防止し、帯電ムラを一層確実に防止することが可
能となる。(Effects of the Invention) According to the present invention, by providing the electrically insulating member having the above-described shape on the inner surface of the shield case on the delivery side of the body to be charged, which is easily influenced by the ionic wind or the blowing air, The current flowing into the shield has a distribution larger than the current flowing into the shield at both ends, whereby uneven charging is eliminated and uniform charging to a high potential is possible. Further, by forming an inwardly bent portion at the end of the charging target introduction side, it is possible to prevent the charging target carrying airflow from flowing into the shield case, and to prevent charging unevenness more reliably.
第１図は本発明を適用したコロナ帯電器の一例の斜視
図、 第２図は本発明の実施例を説明する断面図、 第３−Ａ図と第３−Ｂ図と第３−Ｃ図は電気絶縁部材の
実施例を示す正面図、 第４図はコロナ帯電器の長手方向の導体への流れ込み電
流図、 第５図は本発明の他の実施例を説明する断面図である。 １…コロナ帯電器、２…コロナワイヤー ８…電気絶縁部材、14…シールドケースFIG. 1 is a perspective view of an example of a corona charger to which the present invention is applied, FIG. 2 is a sectional view for explaining an embodiment of the present invention, FIGS. 3-A, 3-B and 3-C. FIG. 4 is a front view showing an embodiment of the electrical insulating member, FIG. 4 is a diagram of current flowing into a conductor in the longitudinal direction of the corona charger, and FIG. 5 is a sectional view for explaining another embodiment of the present invention. 1 ... Corona charger, 2 ... Corona wire 8 ... Electrical insulating member, 14 ... Shield case
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭53−130044（ＪＰ，Ａ) 特開 昭54−12847（ＪＰ，Ａ) 特開 昭57−186765（ＪＰ，Ａ) 特開 昭54−70845（ＪＰ，Ａ) 実開 昭57−93942（ＪＰ，Ｕ) ─────────────────────────────────────────────────── --- Continuation of front page (56) References JP-A-53-130044 (JP, A) JP-A-54-12847 (JP, A) JP-A-57-186765 (JP, A) JP-A-54- 70845 (JP, A) Actually opened Sho 57-93942 (JP, U)
Claims (2)
スと、該シールドケース内に張架されたコロナワイヤー
とから成るコロナ帯電器において、 該シールドケースの被帯電体送出側の側壁部内面に、一
端縁が該側壁の開口端とほぼ一致し、且つ他端縁がケー
ス中央部において低くケース両端部において高い凹形状
を有する電気絶縁部材を設けたことを特徴とするコロナ
帯電器。1. A corona charger comprising a metal shield case having a charging opening and a corona wire stretched in the shield case, wherein an inner surface of a side wall portion of the shield case on the side to be charged is delivered. A corona charger characterized in that an electrical insulating member is provided, one end edge of which is substantially coincident with an opening end of the side wall, and the other end edge of which has a concave shape which is low at the center of the case and high at both ends of the case.
スと、該シールドケース内に張架されたコロナワイヤー
とから成るコロナ帯電器において、 該シールドケースの被帯電体送出側の側壁部内面に、一
端縁が該側壁の開口端とほぼ一致し、且つ他端縁がケー
ス中央部において低くケース両端部において高い凹形状
を有する電気絶縁部材を設け且つ被帯電体導入側側壁部
の開口端に小間隔の内方向折曲部を形成したことを特徴
とするコロナ帯電器。2. A corona charger comprising a metallic shield case having a charging opening and a corona wire stretched in the shield case, wherein the shield case is provided on an inner surface of a side wall of the charged body delivery side. An electric insulating member having one end edge substantially coincident with the opening end of the side wall and the other end edge having a concave shape that is low at the center of the case and high at both ends of the case, A corona charger characterized in that the inward bent portions are formed at a small interval.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60054657A JPH0658560B2 (en) | 1985-03-20 | 1985-03-20 | Corona charger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60054657A JPH0658560B2 (en) | 1985-03-20 | 1985-03-20 | Corona charger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61215564A JPS61215564A (en) | 1986-09-25 |
| JPH0658560B2 true JPH0658560B2 (en) | 1994-08-03 |
Family
ID=12976854
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60054657A Expired - Lifetime JPH0658560B2 (en) | 1985-03-20 | 1985-03-20 | Corona charger |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0658560B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7016628B2 (en) | 2002-10-18 | 2006-03-21 | Seiko Epson Corporation | Image forming apparatus having device for charging a photosensitive body |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0285442U (en) * | 1988-12-20 | 1990-07-04 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53130044A (en) * | 1977-04-20 | 1978-11-13 | Canon Inc | Corona discharger |
| JPS5412847A (en) * | 1977-06-30 | 1979-01-30 | Fujitsu Ltd | Corona charger |
| JPS5793942U (en) * | 1980-11-28 | 1982-06-09 |
-
1985
- 1985-03-20 JP JP60054657A patent/JPH0658560B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7016628B2 (en) | 2002-10-18 | 2006-03-21 | Seiko Epson Corporation | Image forming apparatus having device for charging a photosensitive body |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61215564A (en) | 1986-09-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0400996A1 (en) | Image forming apparatus | |
| US4112299A (en) | Corona device with segmented shield | |
| CA1125359A (en) | Scorotron charging apparatus | |
| JPH0658560B2 (en) | Corona charger | |
| EP0538902B1 (en) | Image forming apparatus having recording material separating means | |
| JPH06110300A (en) | Device for charging photoconductive surface at uniform potential | |
| JPS61223859A (en) | Corona charger | |
| JPS6339713Y2 (en) | ||
| JPH0455325Y2 (en) | ||
| JPH0643814Y2 (en) | Corona discharger for electrophotography | |
| JPH0476568A (en) | Corona discharging device | |
| US4437001A (en) | Corona generating apparatus | |
| JPS6050555A (en) | Corona discharge device | |
| JPH0434525Y2 (en) | ||
| JP3054004B2 (en) | Corona discharge device | |
| JP3157569B2 (en) | Transfer device | |
| JPS6134531Y2 (en) | ||
| JPH068600Y2 (en) | Charger | |
| JP2586062B2 (en) | Image forming device | |
| JPS60192969A (en) | Solid discharging device for charging sensitive body of copier | |
| JPS58166365A (en) | Electrifying device of electrophotography | |
| JPS60229079A (en) | Transfer device | |
| JPH0245192B2 (en) | TAIDENKI | |
| JPH10171211A (en) | Electrifier for image forming device | |
| JPS5866970A (en) | Electrophotographic corona charger |