JPH0636114B2 - Electrophotographic reversal developing device - Google Patents
Electrophotographic reversal developing deviceInfo
- Publication number
- JPH0636114B2 JPH0636114B2 JP62002695A JP269587A JPH0636114B2 JP H0636114 B2 JPH0636114 B2 JP H0636114B2 JP 62002695 A JP62002695 A JP 62002695A JP 269587 A JP269587 A JP 269587A JP H0636114 B2 JPH0636114 B2 JP H0636114B2
- Authority
- JP
- Japan
- Prior art keywords
- developing
- photosensitive member
- electrophotographic photosensitive
- developing device
- electrophotographic
- 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
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- Developing For Electrophotography (AREA)
Description
【発明の詳細な説明】 （Ａ）産業上の利用分野 本発明は電子写真感光体を液体現像剤で反転現像するた
めの反転現像装置に関し、特に現像装置の構成要素に
は、液体現像剤中のトナー粒子が付着しない様に、現像
バイアス電圧を印加する、電子写真反転現像装置に関す
る。DETAILED DESCRIPTION OF THE INVENTION (A) Field of Industrial Application The present invention relates to a reversal developing device for reversal developing an electrophotographic photosensitive member with a liquid developer, and in particular, a component of the developing device is a liquid developer. And an electrophotographic reversal developing device for applying a developing bias voltage so that the toner particles of No. 1 adhere to each other.
（Ｂ）従来技術 第２図は従来の電子写真反転現像装置の断面略図であ
る。(B) Prior Art FIG. 2 is a schematic sectional view of a conventional electrophotographic reversal developing apparatus.
電子写真感光体１３は、印刷版として利用される様に、
Ａｌ板の表面を粗面化処理し、陽極酸化膜を施し、その
上に、感光層として例えば銅フタロシアニン顔料をフェ
ノール樹脂中に分散させたものを塗布、乾燥したものか
らなっている。The electrophotographic photoreceptor 13 is used as a printing plate,
The surface of the Al plate is roughened, anodized film is applied, and a photosensitive layer, for example, copper phthalocyanine pigment dispersed in phenol resin is applied and dried thereon.
電子写真感光体１３は、第２図の現像装置の右手から、
送りローラ対４１、４２によって現像液８によって満た
されている電極板２、２１の中に送り込まれ、絞りロー
ラ対６１、６２によって現像液８が絞られ、第２図中の
矢印の方向に送出される。The electrophotographic photosensitive member 13 is provided from the right hand of the developing device shown in FIG.
It is sent into the electrode plates 2 and 21 filled with the developing solution 8 by the feed roller pair 41 and 42, and the developing solution 8 is squeezed by the squeezing roller pair 61 and 62, and is delivered in the direction of the arrow in FIG. To be done.
図示していないが第２図の右手方向には、結版部、帯電
部、画像露光部がある。電子写真感光体１３は帯電部に
おいて例えば正のコロナチャージが行なわれ、露光部で
は、例えばＨｅ−Ｎｅレーザー光により、ネガの画像露
光が行われる。Although not shown, in the right-hand direction of FIG. 2, there are a plate binding portion, a charging portion, and an image exposure portion. The electrophotographic photosensitive member 13 is subjected to, for example, positive corona charging at the charging portion, and negative image exposure is performed at the exposing portion by, for example, He—Ne laser light.
現像剤８には例えば正の電荷を持ったトナー粒子が分散
されている。電極板２と電極板２１の間には、現像バイ
アス電源１０により、現像バイアス電圧が印加されてい
る。In the developer 8, for example, toner particles having a positive charge are dispersed. A developing bias voltage is applied between the electrode plate 2 and the electrode plate 21 by the developing bias power source 10.
従来のバイアス印加方法は、送りロール４２と絞りロー
ル６２を金属で構成し、現像装置の枠を通じ第２図の様
に電気的に閉回路を構成している。電子写真感光体１３
の潜像は非画像部は正に帯電しており、画像部は露光に
より電荷が消滅している。現像剤８はポンプ（図示せ
ず）等により、現像剤供給部１から連続して供給されて
いる。電極板２、２１の間の電子写真感光体１３では非
画像部は正に帯電しているため、正の電荷を持ったトナ
ー粒子を反発し、画像部は電荷を持っていないが、非画
像部から画像部に向っての電気力線にそって、トナー粒
子が移動させられ、露光された部分にトナー粒子が付着
し、いわゆる反転現像が進行する。少し広い露光面積に
なるとエッジ効果により、画像の中央部ではトナー粒子
が付きにくくなるため、第２図の様に、現像バイアス電
圧を印加し、トナー粒子の付きを良くするのは、電子写
真反転現像装置においては、常識とさえなっている。と
ころが厄介なことには、現像バイアスの働きは、電極板
２に対して電位差があるところにトナー粒子を、付着さ
せる様に働くから、第２図においては電極板２１やロー
ル４２、絞りロール６２、更に図示していないが現像装
置の枠組等の、現像剤８が存在し、かつ電気的に閉回路
を構成している所には、どこにでもトナー粒子が付着す
る。この事は余分なトナー粒子の消費となったり、付着
したトナー粒子が凝集し、再び現像剤８の中に入り、現
像時に電子写真感光体１３の非画像部に機械的に付着し
て、汚れを引き起す。又、この様な問題を生じさせない
ために、オペレーターは現像部を頻繁に清掃しなければ
ならず、メンテナンスに多大の時間と労力を費やしてい
るのが現状である。In the conventional bias applying method, the feed roll 42 and the squeeze roll 62 are made of metal, and a closed circuit is electrically constructed as shown in FIG. 2 through the frame of the developing device. Electrophotographic photoreceptor 13
In the latent image of No. 3, the non-image portion is positively charged, and the image portion has its charge disappeared by exposure. The developer 8 is continuously supplied from the developer supply unit 1 by a pump (not shown) or the like. In the electrophotographic photosensitive member 13 between the electrode plates 2 and 21, since the non-image portion is positively charged, it repels toner particles having a positive charge, and the image portion has no charge, but the non-image portion The toner particles are moved along the lines of electric force from the image portion toward the image portion, and the toner particles adhere to the exposed portion, so-called reversal development proceeds. When the exposed area is a little wider, the edge effect makes it difficult for the toner particles to attach to the center of the image. Therefore, as shown in FIG. It is even common sense in developing devices. However, the trouble is that the developing bias works to attach the toner particles to the place where there is a potential difference with respect to the electrode plate 2, so in FIG. 2 the electrode plate 21, roll 42, and squeeze roll 62 are used. Further, although not shown, toner particles are attached to a place where the developer 8 is present and electrically forms a closed circuit, such as a framework of a developing device. This means that extra toner particles are consumed, or the adhered toner particles agglomerate, enter the developer 8 again, and are mechanically adhered to the non-image portion of the electrophotographic photosensitive member 13 at the time of development, resulting in contamination. Cause. Further, in order to prevent such a problem from occurring, the operator has to clean the developing section frequently, which requires a great deal of time and labor for maintenance.
（Ｃ）発明が解決しようとする問題点 本発明は、前記従来技術の問題点を解決するものであ
り、その目的とするところは、汚れのない良好な電子写
真感光体の現像を提供することにある。本発明の他の目
的は、現像装置の構成要素にはトナー粒子の付着をなく
すことにより、メンテナンスを容易にすることにある。
本発明の更に他の目的は、トナー粒子の浪費を防ぐこと
にある。(C) Problems to be Solved by the Invention The present invention is to solve the above-mentioned problems of the prior art, and an object of the present invention is to provide good development of an electrophotographic photosensitive member without stains. It is in. Another object of the present invention is to facilitate maintenance by eliminating the adhesion of toner particles to the components of the developing device.
Still another object of the present invention is to prevent waste of toner particles.
（Ｄ）問題点を解決するための手段 現像電極板とその下方に設けられたガイド板との間に液
体現像剤を供給するとともに、金属板支持体上に感光層
を有する電子写真感光体を感光面を上側にして通過させ
て反転現像する現像装置であって、前記電子写真感光体
と前記電極板を除いては、液体現像剤が存在するところ
に現像バイアス閉回路を構成しないように、現像バイア
スを印加することにより、前記目的が達成される。(D) Means for Solving the Problems A liquid developer is supplied between a developing electrode plate and a guide plate provided below the developing electrode plate, and an electrophotographic photosensitive member having a photosensitive layer on a metal plate support is provided. A developing device for reversal development by passing the photosensitive surface upward, so that a developing bias closed circuit is not formed where liquid developer exists except for the electrophotographic photosensitive member and the electrode plate. By applying the developing bias, the above object is achieved.
更に具体的に本発明を図面を用いて詳述する。The present invention will be described more specifically with reference to the drawings.
第１図は本発明の電子写真反転現像装置の断面略図であ
る。第１図において、１は現像剤供給部であり、図示し
ていないが、ポンプにより現像剤８を連続的に供給する
部分である。２は電極板であり、電気の良導体であれば
材質を問わない。例えば全ての金属が作用可能である。
３はガイド板である。４、５は送りローラ対、６、７は
絞りローラ対であり、それぞれ絶縁性ゴムロールであ
る。FIG. 1 is a schematic sectional view of an electrophotographic reversal developing device of the present invention. In FIG. 1, reference numeral 1 denotes a developer supply unit, which is a unit (not shown) for continuously supplying the developer 8 by a pump. 2 is an electrode plate, which may be made of any material as long as it is a good conductor of electricity. For example, all metals can work.
3 is a guide plate. Reference numerals 4 and 5 denote feed roller pairs, and 6 and 7 denote diaphragm roller pairs, which are insulating rubber rolls.
８は、絶縁性溶媒に正に帯電したトナー粒子を分散した
現像剤である。９は現像剤容器、１０は、現像バイアス
電源である。１１、１２はバイアス給電片であり、送り
ローラ対４、５、絞りローラ対６、７の外側に配置し、
バイアス給電片１１、１２間の距離は、電子写真感光体
１３の現像方向の長さより短く設定する。バイアス給電
片１１、１２による電子写真感光体１３への給電方法
は、例えば金属ロールを電子写真感光体１３の現像速度
と同期して回転させた上を、電子写真感光体１３を搬送
しても良い。あるいは、細い弾力のある針状材質の上を
電子写真感光体１３の裏面が、摺動しながら搬送される
構成としても良い。絞りローラ対６、７を通過した電子
写真感光体１３の裏面は実質的には完全に現像剤８が絞
り取られているが、微視的にはわずかに現像剤８が残っ
ており、これがバイアス給電片１２を汚す場合がある。Reference numeral 8 is a developer in which positively charged toner particles are dispersed in an insulating solvent. Reference numeral 9 is a developer container, and 10 is a developing bias power source. Reference numerals 11 and 12 denote bias power feeding pieces, which are arranged outside the feed roller pairs 4 and 5 and the diaphragm roller pairs 6 and 7,
The distance between the bias feeding pieces 11 and 12 is set shorter than the length of the electrophotographic photosensitive member 13 in the developing direction. A method of supplying power to the electrophotographic photosensitive member 13 by the bias power supply pieces 11 and 12 is, for example, when the electrophotographic photosensitive member 13 is conveyed after the metal roll is rotated in synchronization with the developing speed of the electrophotographic photosensitive member 13. good. Alternatively, the back surface of the electrophotographic photosensitive member 13 may be conveyed while sliding on the thin elastic needle-shaped material. The back surface of the electrophotographic photosensitive member 13 that has passed through the pair of squeezing rollers 6 is substantially completely squeezed with the developer 8, but microscopically, the developer 8 remains slightly. The bias feeding piece 12 may be soiled.
バイアス給電片１２を細かい形状にすると、たとえば、
トナー粒子が、バイアス給電片１２に付着していても、
電子写真感光体１３の裏面の摺動によりトナー粒子が取
られてしまうので、バイアス給電片１２の表面は常に清
掃されるから、バイアス電圧の供給には支障をきたさな
い。バイアス給電片１２は細かい方が好ましく、その範
囲は０．１mm〜３０mm、好ましくは０．５mm〜１０mmで
ある。When the bias feeding piece 12 has a fine shape, for example,
Even if the toner particles adhere to the bias power supply piece 12,
Since the toner particles are removed by the sliding of the back surface of the electrophotographic photosensitive member 13, the surface of the bias power supply piece 12 is always cleaned, so that the supply of the bias voltage is not hindered. The bias feeding piece 12 is preferably fine, and its range is 0.1 mm to 30 mm, preferably 0.5 mm to 10 mm.
送りローラ対４、５絞りローラ対６、７及びガイド板３
等を支持する枠組（図示していない）も、必然的に現像
剤８によって濡れるから、絶縁性材質で構成するか、金
属材質で構成する場合は、電気的に浮かせるのが好まし
い。同様に、ガイド板３も絶縁性材質で構成するか、金
属材質で構成する場合は、電気的に浮かせるのが好まし
い。Feed roller pair 4, 5 Aperture roller pair 6, 7 and guide plate 3
Since a framework (not shown) for supporting the above components is inevitably wet with the developer 8, it is preferably electrically floated when it is made of an insulating material or a metal material. Similarly, if the guide plate 3 is also made of an insulating material, or if it is made of a metal material, it is preferably electrically floated.
電子写真感光体１３は金属板支持体上に電子写真感光層
を設けたものからなる。金属板支持体には、例えばアル
ミニウム、鉄、銅、亜鉛、鉛、等の金属あるいは種々の
金属の合金が使用出来る。あるいはＰＥＴフィルムにア
ルミニウム、鉄等を貼合せた、いわゆる複合支持体等の
様に実質的に電気の良導体を含む。The electrophotographic photosensitive member 13 is formed by providing an electrophotographic photosensitive layer on a metal plate support. For the metal plate support, for example, metals such as aluminum, iron, copper, zinc, lead, etc. or alloys of various metals can be used. Alternatively, it contains a good electrical conductor such as a so-called composite support obtained by laminating aluminum, iron or the like on a PET film.
電子写真感光体１３の感光層は、例えばアルカリに可溶
性の樹脂、例えば、スチレン−無水マイレン酸共重合
体、マイレン酸エステル樹脂、酢酸ビニル−無水マイレ
ン酸共重合体、フェノール樹脂等の樹脂の中に、無機、
又は有機光導電性物質、例えば、酸化亜鉛、硫化カドミ
ウム、銅フタロシアニン、芳香族第三級アミノ化合物
等、種々の有機光導電材料を分散もしくは溶解したもの
を塗布乾燥して得る。The photosensitive layer of the electrophotographic photoreceptor 13 is made of, for example, an alkali-soluble resin such as a styrene-maleic anhydride copolymer, a maleic acid ester resin, a vinyl acetate-maleic anhydride copolymer, or a phenol resin. Inorganic,
Alternatively, an organic photoconductive substance, for example, zinc oxide, cadmium sulfide, copper phthalocyanine, aromatic tertiary amino compound, or the like in which various organic photoconductive materials are dispersed or dissolved is applied and dried.
第１図において、電子写真感光体１３がない場合は、図
からも明らかな様に、現像バイアス電源１０を介して、
全く閉回路を形成しない。ネガの画像露光された電子写
真感光体１３が送りロール対４、５により、電極板２の
下に入って来ると、現像バイアス電源１０−電極板２−
電子写真感光体１３−バイアス給電片１１−現像バイア
ス電源１０の閉回路が形成され、電子写真感光体１３の
感光層にバイアス電圧が印加され、良好な現像が進行す
る。In FIG. 1, when the electrophotographic photosensitive member 13 is not provided, as is apparent from the drawing, through the developing bias power source 10,
Does not form a closed circuit at all. When the negative image-exposed electrophotographic photosensitive member 13 comes under the electrode plate 2 by the feed roll pairs 4 and 5, the developing bias power source 10-the electrode plate 2-
A closed circuit of the electrophotographic photosensitive member 13-bias feeding piece 11-developing bias power source 10 is formed, a bias voltage is applied to the photosensitive layer of the electrophotographic photosensitive member 13, and good development proceeds.
更に電子写真感光体１３は、絞りロール対６、７によ
り、余分の現像剤８が絞られて、給電片１２に達する。Further, in the electrophotographic photosensitive member 13, the excess developer 8 is squeezed by the squeeze roll pairs 6 and 7, and reaches the power feeding piece 12.
この間も電子写真感光体１３以外で、現像剤８が存在す
る所には、全く閉回路を形成しないので、現像装置のど
の部分にもバイアス印加によるトナー粒子の汚れが生じ
ない。絞りロール対６、７を通過してしまった現像剤の
電子写真感光体１３は、図示していないが、通常の乾
燥、定着、溶出、ガム引等の行程を経て所望とする印刷
版を得る。During this period as well, except for the electrophotographic photoreceptor 13, a closed circuit is not formed at a place where the developer 8 is present, so that the toner particles are not contaminated due to the bias application in any part of the developing device. Although not shown, the electrophotographic photosensitive member 13 of the developer which has passed through the pair of squeezing rolls 6 and 7 obtains a desired printing plate through processes such as ordinary drying, fixing, elution, gumming, and the like. .
本発明の詳細な説明においては、電子写真感光体の感光
層には正帯電、現像剤のトナー粒子は正電荷、電極板へ
の印加電圧は圧、として説明したがこれに限定されるも
のではなく、電子写真感光体の感光層には、負帯電、現
像剤のトナー粒子は負電荷、電極板への印加電圧は負と
しても効果は全く変らない。In the detailed description of the present invention, the photosensitive layer of the electrophotographic photosensitive member is positively charged, the toner particles of the developer are positively charged, and the voltage applied to the electrode plate is pressure, but the present invention is not limited thereto. Even if the photosensitive layer of the electrophotographic photosensitive member is negatively charged, the toner particles of the developer are negatively charged, and the voltage applied to the electrode plate is negative, the effect is not changed at all.
（Ｅ）発明の効果 本発明によれば、この様に現像装置のいかなる所にもバ
イアス電圧によるトナー粒子の付着がない。(E) Effect of the Invention According to the present invention, toner particles are not attached to a developing device by bias voltage in this way.
従って、トナー粒子の凝集による感光層への汚れも全く
生じない。又トナー粒子の不必要な浪費もない。Therefore, the contamination of the photosensitive layer due to the aggregation of toner particles does not occur at all. There is also no unnecessary waste of toner particles.
現像装置へのトナー粒子の付着がないからメンテナンス
の回数が減少し、メンテナンスも容易である。Since the toner particles do not adhere to the developing device, the number of times of maintenance is reduced and the maintenance is easy.
第１図は、本発明の電子写真反転現像装置の断面略図で
あり、第２図は従来の現像装置の断面略図である。 １……現像剤供給部、８……現像剤 ２……電極板、９……現像剤容器 ３……ガイド板、１０……現像バイアス電源 ４，５……送りローラ対、１１……バイアス給電片 ６，７……絞りローラ対、１２……バイアス給電片 ４１，４２……送りローラ対、１３……電子写真感光体 ６１，６２……絞りローラ対、２１……電極板FIG. 1 is a schematic sectional view of an electrophotographic reversal developing device of the present invention, and FIG. 2 is a schematic sectional view of a conventional developing device. 1 ... Developer supply section, 8 ... Developer 2 ... Electrode plate, 9 ... Developer container 3 ... Guide plate, 10 ... Development bias power supply 4, 5 ... Feed roller pair, 11 ... Bias Feeding piece 6, 7 ... Aperture roller pair, 12 ... Bias feeding piece 41, 42 ... Feed roller pair, 13 ... Electrophotographic photosensitive member 61, 62 ... Aperture roller pair, 21 ... Electrode plate
Claims (1)
板との間に液体現像剤を供給するとともに、金属板支持
体上に感光層を有する電子写真感光体を感光面を上側に
して通過させて反転現像する現像装置であって、前記電
子写真感光体と前記電極板を除いては、液体現像剤が存
在するところに現像バイアス閉回路を構成しないよう
に、現像バイアスを印加することを特徴とする電子写真
反転現像装置。1. A liquid developer is supplied between a developing electrode plate and a guide plate provided below the developing electrode plate, and an electrophotographic photosensitive member having a photosensitive layer on a metal plate support is placed with its photosensitive surface facing upward. A developing device for reversal development by passing it, wherein a developing bias is applied so that a developing bias closed circuit is not formed where liquid developer exists except for the electrophotographic photosensitive member and the electrode plate. An electrophotographic reversal developing device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62002695A JPH0636114B2 (en) | 1987-01-09 | 1987-01-09 | Electrophotographic reversal developing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62002695A JPH0636114B2 (en) | 1987-01-09 | 1987-01-09 | Electrophotographic reversal developing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63170676A JPS63170676A (en) | 1988-07-14 |
| JPH0636114B2 true JPH0636114B2 (en) | 1994-05-11 |
Family
ID=11536411
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62002695A Expired - Lifetime JPH0636114B2 (en) | 1987-01-09 | 1987-01-09 | Electrophotographic reversal developing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0636114B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03213885A (en) * | 1989-11-21 | 1991-09-19 | Mitsubishi Paper Mills Ltd | Electrophotographic wet type reversal developing device and plate making method for electrophotographic printing using the same |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50120841A (en) * | 1974-03-09 | 1975-09-22 | ||
| JPS5911906B2 (en) * | 1974-12-17 | 1984-03-19 | 富士通株式会社 | Development bias application control method |
| JPS5936259B2 (en) * | 1978-04-11 | 1984-09-03 | コニカ株式会社 | How to form a printing plate |
| JPS5825477A (en) * | 1981-08-10 | 1983-02-15 | Konishiroku Photo Ind Co Ltd | Etching method for lithographic printing plate |
| JPS5827152A (en) * | 1981-08-10 | 1983-02-17 | Konishiroku Photo Ind Co Ltd | Manufacture of lithographic plate |
| JPS5880658A (en) * | 1981-11-10 | 1983-05-14 | Konishiroku Photo Ind Co Ltd | Developing device of printing original sheet |
| JPS58173766A (en) * | 1982-04-06 | 1983-10-12 | Fuji Photo Film Co Ltd | Developing method of electrophotograph |
| JPH065421B2 (en) * | 1985-05-07 | 1994-01-19 | 松下電器産業株式会社 | Wet reversal development device |
-
1987
- 1987-01-09 JP JP62002695A patent/JPH0636114B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63170676A (en) | 1988-07-14 |
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