JPH0479360U - - Google Patents

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Publication number
JPH0479360U
JPH0479360U JP12379190U JP12379190U JPH0479360U JP H0479360 U JPH0479360 U JP H0479360U JP 12379190 U JP12379190 U JP 12379190U JP 12379190 U JP12379190 U JP 12379190U JP H0479360 U JPH0479360 U JP H0479360U
Authority
JP
Japan
Prior art keywords
grid
opening
shield
corona discharge
image forming
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.)
Granted
Application number
JP12379190U
Other languages
Japanese (ja)
Other versions
JP2538700Y2 (en
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 filed Critical
Priority to JP1990123791U priority Critical patent/JP2538700Y2/en
Publication of JPH0479360U publication Critical patent/JPH0479360U/ja
Application granted granted Critical
Publication of JP2538700Y2 publication Critical patent/JP2538700Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Electrostatic Charge, Transfer And Separation In Electrography (AREA)

Description

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

第１図に本考案に基づいて構成される画像形成
装置用コロナ放電装置の基本形の断面図、第２図
は本考案のコロナ放電装置と従来のコロトロン及
びスコロトロンの帯電特性を測定した結果を示す
図、第３図はコロトロンとスコロトロンの構成と
作用を説明するための図である。 ２……シールド、４……感光体、１１，１２…
…放電ワイヤ、２１，２２……開口、３１……グ
リツド。 Fig. 1 is a sectional view of the basic form of a corona discharge device for an image forming apparatus constructed based on the present invention, and Fig. 2 shows the results of measuring the charging characteristics of the corona discharge device of the present invention and conventional corotrons and scorotrons. FIG. 3 is a diagram for explaining the structure and operation of a corotron and a scorotron. 2...Shield, 4...Photoreceptor, 11, 12...
...discharge wire, 21, 22...opening, 31...grid.

Claims (1)

【実用新案登録請求の範囲】 (1) 静電潜像形成に先立つて感光体表面に沿つ
て相対的に移動することによりその表面に均一に
所定極性の帯電を行う画像形成装置用コロナ放電
装置において、感光体に向かつて開口している樋
状のシールドと、シールドの開口の移動方向下流
側の略半分に設けられたグリツドと、シールドの
内部にその長手方向に相互に平行に張架された２
本以上の放電ワイヤとからなることを特徴とする
画像形成装置用コロナ放電装置。 (2) ２本以上の放電ワイヤの中、少なくとも１
本は、感光体を下側とするとき、グリツドの開口
中心側のエツジにかからずグリツドの上側に配置
し、放電ワイヤの少なくとも他の１本はグリツド
の開口中心側のエツジにかからずグリツドを配置
していないシールドの開口の上側に配置したこと
を特徴とする請求項１記載の画像形成装置用コロ
ナ放電装置。 (3) グリツドを配置していないシールドの開口
の上側に配置した放電ワイヤをグリツドの上側に
配置した放電ワイヤに比較してより感光体面に近
い位置に配置したことを特徴とする請求項２記載
の画像形成装置用コロナ放電装置。 (4) グリツドを感光体の表面形状に合わせて円
筒面状に構成したことを特徴とする請求項１から
３の何れか１項記載の画像形成装置用コロナ放電
装置。 (5) シールドの開口側と反対の背面に別の開口
を設けたことを特徴とする請求項１から４の何れ
か１項記載の画像形成装置用コロナ放電装置。[Claims for Utility Model Registration] (1) A corona discharge device for an image forming device that uniformly charges the surface of a photoconductor to a predetermined polarity by moving relatively along the surface of the photoconductor prior to forming an electrostatic latent image. In this method, a gutter-shaped shield is opened toward the photoreceptor, a grid is provided approximately in half of the opening of the shield on the downstream side in the direction of movement, and a grid is stretched parallel to each other in the longitudinal direction inside the shield. Ta2
1. A corona discharge device for an image forming apparatus, comprising a discharge wire of more than one book. (2) At least one of two or more discharge wires
When the photoreceptor is on the lower side, the book is placed above the grid so that it does not touch the edge of the opening center side of the grid, and at least one other discharge wire does not touch the edge of the opening center side of the grid. 2. The corona discharge device for an image forming apparatus according to claim 1, wherein the corona discharge device is disposed above an opening in the shield where no grid is disposed. (3) The discharge wire placed above the opening of the shield where no grid is placed is placed closer to the surface of the photoreceptor than the discharge wire placed above the grid. corona discharge device for image forming devices. (4) The corona discharge device for an image forming apparatus according to any one of claims 1 to 3, wherein the grid is configured to have a cylindrical surface shape to match the surface shape of the photoreceptor. (5) The corona discharge device for an image forming apparatus according to any one of claims 1 to 4, characterized in that another opening is provided on the back surface opposite to the opening side of the shield.
JP1990123791U 1990-11-26 1990-11-26 Corona discharge device for image forming apparatus Expired - Lifetime JP2538700Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1990123791U JP2538700Y2 (en) 1990-11-26 1990-11-26 Corona discharge device for image forming apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1990123791U JP2538700Y2 (en) 1990-11-26 1990-11-26 Corona discharge device for image forming apparatus

Publications (2)

Publication Number Publication Date
JPH0479360U true JPH0479360U (en) 1992-07-10
JP2538700Y2 JP2538700Y2 (en) 1997-06-18

Family

ID=31871478

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1990123791U Expired - Lifetime JP2538700Y2 (en) 1990-11-26 1990-11-26 Corona discharge device for image forming apparatus

Country Status (1)

Country Link
JP (1) JP2538700Y2 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5470055A (en) * 1977-11-16 1979-06-05 Fujitsu Ltd Corona charger
JPS61193463U (en) * 1985-05-24 1986-12-02
JPS62269176A (en) * 1986-05-16 1987-11-21 Matsushita Graphic Commun Syst Inc Scorotron device
JPS6482059A (en) * 1987-09-25 1989-03-28 Konishiroku Photo Ind Electrifier

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5470055A (en) * 1977-11-16 1979-06-05 Fujitsu Ltd Corona charger
JPS61193463U (en) * 1985-05-24 1986-12-02
JPS62269176A (en) * 1986-05-16 1987-11-21 Matsushita Graphic Commun Syst Inc Scorotron device
JPS6482059A (en) * 1987-09-25 1989-03-28 Konishiroku Photo Ind Electrifier

Also Published As

Publication number Publication date
JP2538700Y2 (en) 1997-06-18

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Legal Events

Date Code Title Description
EXPY Cancellation because of completion of term