JPH03213885A - Electrophotographic wet type reversal developing device and plate making method for electrophotographic printing using the same - Google Patents
Electrophotographic wet type reversal developing device and plate making method for electrophotographic printing using the sameInfo
- Publication number
- JPH03213885A JPH03213885A JP29843490A JP29843490A JPH03213885A JP H03213885 A JPH03213885 A JP H03213885A JP 29843490 A JP29843490 A JP 29843490A JP 29843490 A JP29843490 A JP 29843490A JP H03213885 A JPH03213885 A JP H03213885A
- Authority
- JP
- Japan
- Prior art keywords
- electrophotographic
- guide plate
- counter electrode
- developing device
- toner
- 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
- 238000000034 method Methods 0.000 title claims description 18
- 239000007788 liquid Substances 0.000 claims abstract description 12
- 239000000615 nonconductor Substances 0.000 claims abstract 2
- 108091008695 photoreceptors Proteins 0.000 claims description 30
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- 229910052782 aluminium Inorganic materials 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 239000011230 binding agent Substances 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 229920005989 resin Polymers 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 239000000049 pigment Substances 0.000 description 3
- 239000004809 Teflon Substances 0.000 description 2
- 229920006362 Teflon® Polymers 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003480 eluent Substances 0.000 description 2
- 238000010828 elution Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- IEQIEDJGQAUEQZ-UHFFFAOYSA-N phthalocyanine Chemical compound N1C(N=C2C3=CC=CC=C3C(N=C3C4=CC=CC=C4C(=N4)N3)=N2)=C(C=CC=C2)C2=C1N=C1C2=CC=CC=C2C4=N1 IEQIEDJGQAUEQZ-UHFFFAOYSA-N 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 239000011787 zinc oxide Substances 0.000 description 2
- 229920001342 Bakelite® Polymers 0.000 description 1
- 229920005177 Duracon® POM Polymers 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 241000270506 Tupinambis Species 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 239000004637 bakelite Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000002508 contact lithography Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 229910052571 earthenware Inorganic materials 0.000 description 1
- 150000002484 inorganic compounds Chemical class 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000012860 organic pigment Substances 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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
- G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
- G03G15/10—Apparatus for electrographic processes using a charge pattern for developing using a liquid developer
Abstract
Description
本発明は電子写真の反転現像装置に関し、特に反転現像
時に、電子写真感光体の裏面が、トナーにより現像され
ない電子写真反転現像装置に関する。本発明の現像装置
は金属性支持体を有する電子写真印刷版の製版に適して
いる。The present invention relates to an electrophotographic reversal developing device, and more particularly to an electrophotographic reversal developing device in which the back surface of an electrophotographic photoreceptor is not developed with toner during reversal development. The developing device of the present invention is suitable for making electrophotographic printing plates having a metallic support.
印刷板として用いられる電子写真感光体は、アルミ板を
砂目室てして、陽極酸化処理を施し、これを支持体とし
て、光導電性材料を結着剤中に分散あるいは溶解した感
光液を塗布乾燥して得られる。
該電子写真感光体は帯電工程、露光工程、現像工程、定
着工程を経て印刷版としたり、電子写真感光体の構成に
よっては、定着工程の後に、溶出工程、ガム引き工程を
経て印刷版としている。前者は主に酸化亜鉛のような光
導電性無機化合物を結合剤樹脂中に分散して導電性支持
体上に塗設した電子写真感光体、後者はフタロシアニン
顔料やアゾ顔料のような有機顔料を溶出工程で用いられ
る溶出液に可溶の結合剤樹脂中に溶解・分散して導電性
支持体上に塗設した電子写真感光体が用いられる。
印刷版を得るための製版機は、原稿と電子写真感光体を
密着して露光するいわゆる密着焼きや、原稿をレンズを
介して電子写真感光体に投影するいわゆる撮影方式、原
稿の画像情報を電気信号に変換し、例えばレーザー光で
電子写真感光体に露光を行う走査露光方式等がある。い
ずれの方式においても、ポジ露光と、ネガ露光があり、
現像においても正現像と反転現像がある事は言うまでも
ない。
第２図は、従来の電子写真反転現像装置で、電子写真感
光体を現像している状況を示す断面概略図である。
電子写真感光体１３ｂは、上部電極板（対電極〕２とガ
イド板３の間を通過する時に、液体現像剤８に含まれる
トナー粒子１４によって反転現像される。上部電極板２
と電子写真感光体１３ｂの支持体との間には、バイアス
電源１０によって適当なバイアス電圧が印加されるが、
反転現像の場合は、通常感光体の表面電位と同極性であ
る。電子写真感光体１３ｂの、現像電極板２とガイド板
３との間の通過性を良くするため、ガイド板３にはテグ
ス１７を巻くか、溝を設けるなりして、電子写真感光体
１３ｂが、ガイド板３に密着するのを防いでいる。
従来ガイド板３は、アルミニウム等の金属製であるので
、例えばガイド板３を電子写真感光体１３ｂの支持体と
同電位にすると、いわゆるアースを取ると、反転現像で
あるが故にガイド板３にはトナー１４が現像されて付着
する。ガイド板３へのトナー１４の付着を防止するため
に、特開昭６３−１７０６７６号公報では、ガイド板３
を電気的に浮かす事が提案されている。この方法で確か
にガイド板３にはトナー現像されないことが確認される
が、電子写真感光体１３ｂの裏面にトナー現像が生じる
結果となった。
この裏面に現像されたトナーの量は、意外にもかなり多
く、通常の画像の面積率を２０％位に見積ってその数倍
が裏面に現像されていることが判明した。従って製版枚
数が多くなると、画像に寄与しないトナーを大量に消費
していることになる。
電子写真感光体の裏面に現像されたトナーは、電子写真
製版機の現像後の工程、つまり搬送系に剥離付着して搬
送トラブルを起こす。このトラブルを防ぐためには、付
着したトナーを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さねばならない。
この様な現象が生じるのは、電子写真感光体の支持体と
して主に金属を用いた時に発生する問題であり第３図の
ように説明できる。第３図において、ガイド板３を電気
的に浮かせると、電子写真感光体１３ｂの外側では、上
部電極板２からの電気力線１５によってガイド板にはマ
イナス電位が生じる。この結果電子写真感光体１３ｂの
真下では分極によってプラス電位が生じ、電気力線１６
は、ガイド板３から電子写真感光体１３ｂの裏面に向か
って生じる。トナー粒子１４はプラスに帯電しているか
ら電気力線１６に沿って電子写真感光体１３ｂの裏面に
現像されることが判明した。An electrophotographic photoreceptor used as a printing plate is an aluminum plate that is grained and anodized. Using this as a support, a photosensitive solution containing a photoconductive material dispersed or dissolved in a binder is applied. Obtained by coating and drying. The electrophotographic photoreceptor undergoes a charging process, an exposure process, a development process, and a fixing process to form a printing plate, or depending on the structure of the electrophotographic photoreceptor, after a fixing process, it undergoes an elution process and a gumming process to form a printing plate. . The former is mainly an electrophotographic photoreceptor in which a photoconductive inorganic compound such as zinc oxide is dispersed in a binder resin and coated on a conductive support, and the latter is an electrophotographic photoreceptor in which an organic pigment such as a phthalocyanine pigment or an azo pigment is dispersed. An electrophotographic photoreceptor is used, which is dissolved and dispersed in a binder resin that is soluble in the eluent used in the elution step and coated on a conductive support. Plate-making machines for obtaining printing plates use the so-called contact printing method, in which the original and the electrophotographic photoreceptor are exposed in close contact with each other, the so-called photographing method, in which the original is projected onto the electrophotographic photoreceptor through a lens, and the image information of the original is transferred electronically. There is a scanning exposure method in which the signal is converted into a signal and an electrophotographic photoreceptor is exposed to, for example, a laser beam. In both methods, there are positive exposure and negative exposure.
It goes without saying that there are two types of development: normal development and reversal development. FIG. 2 is a schematic cross-sectional view showing a state in which an electrophotographic photoreceptor is being developed in a conventional electrophotographic reversal developing device. When the electrophotographic photoreceptor 13b passes between the upper electrode plate (counter electrode) 2 and the guide plate 3, it is reversely developed by the toner particles 14 contained in the liquid developer 8.The upper electrode plate 2
A suitable bias voltage is applied by the bias power supply 10 between the support body of the electrophotographic photoreceptor 13b,
In the case of reversal development, the polarity is usually the same as the surface potential of the photoreceptor. In order to improve the passage of the electrophotographic photoreceptor 13b between the developing electrode plate 2 and the guide plate 3, the guide plate 3 is wrapped with a thread 17 or provided with a groove so that the electrophotographic photoreceptor 13b can pass through the guide plate 3. , preventing it from coming into close contact with the guide plate 3. Conventionally, the guide plate 3 is made of metal such as aluminum, so for example, if the guide plate 3 is made to have the same potential as the support of the electrophotographic photoreceptor 13b, so-called grounding, the guide plate 3 will be damaged due to reversal development. The toner 14 is developed and attached. In order to prevent the toner 14 from adhering to the guide plate 3, in Japanese Patent Application Laid-open No. 170676/1983, the guide plate 3 is
It has been proposed to float electrically. Although it was confirmed that toner was not developed on the guide plate 3 using this method, toner development occurred on the back surface of the electrophotographic photoreceptor 13b. The amount of toner developed on the back side was surprisingly large, and it was found that the area ratio of a normal image was estimated to be about 20%, and several times that amount was developed on the back side. Therefore, when the number of platelets increases, a large amount of toner that does not contribute to the image is consumed. The toner developed on the back surface of the electrophotographic photoreceptor peels off and adheres to the post-development process of the electrophotographic engraving machine, that is, the conveyance system, causing conveyance troubles. In order to prevent this trouble, the adhered toner must be cleaned, and a great deal of time and effort must be spent on maintenance. The occurrence of such a phenomenon is a problem that occurs when metal is mainly used as a support for an electrophotographic photoreceptor, and can be explained as shown in FIG. In FIG. 3, when the guide plate 3 is electrically floated, a negative potential is generated on the guide plate by electric lines of force 15 from the upper electrode plate 2 outside the electrophotographic photoreceptor 13b. As a result, a positive potential is generated directly below the electrophotographic photoreceptor 13b due to polarization, and the lines of electric force 16
is generated from the guide plate 3 toward the back surface of the electrophotographic photoreceptor 13b. It has been found that since the toner particles 14 are positively charged, they are developed on the back surface of the electrophotographic photoreceptor 13b along the lines of electric force 16.
本発明は、上記従来技術の問題点を解決するものであり
、その目的は電子写真感光体の裏面にトナー現像が生じ
ない電子写真湿式反転現像装置を提供することにある。
本発明の他の目的は、トナーの消費量を少なくする電子
写真湿式反転現像装置を提供する事にある。本発明の更
に他の目的は、電子写真感光体の裏面に現像されたトナ
ーの剥離による汚れを防止して、メンテナンス性を向上
することにある。本発明の更に他の目的は金属製支持体
を有する電子写真印刷版の製版方法を提供することにあ
る。The present invention solves the above problems of the prior art, and its purpose is to provide an electrophotographic wet reversal developing device in which toner development does not occur on the back surface of an electrophotographic photoreceptor. Another object of the present invention is to provide an electrophotographic wet reversal developing device that reduces toner consumption. Still another object of the present invention is to improve maintainability by preventing stains caused by peeling of toner developed on the back surface of an electrophotographic photoreceptor. Still another object of the present invention is to provide a method for making an electrophotographic printing plate having a metal support.
本発明の目的は、電子写真反転現像装置において、対電
極と対向して反転現像部を構成するガイド板を非電導体
構造物で構成することにより達成される。
すなわち本発明はバイアス電圧を印加するようにした対
電極と非電導体構造物からなるガイド板との間を電子写
真感光体を通過させて液体現像剤で反転現像する電子写
真湿式反転現像装置である。
更には金属製支持体を有する電子写真印刷版を帯電し、
これに像露光を与えた後、少なくとも対電極と非電導体
構造物からなるガイド板とを備えた現像部を有する現像
装置により、前記対電極にバイアス電圧を印加しながら
液体現像剤で反転現像する工程を有する電子写真印刷版
の製版方法である。
非電導体構造物の具体的な例は、市販のプラスチック板
でよく、例えば塩化ビニール板、アクリル板、ナイロン
板、ポリエチレン板、ポリプロピレン板、ジュラコン板
、ＡＱＳ板、ポリカーボネイト板、テフロン板、ベーク
ライト板等が用いられる。また、陶器、磁器、セラミッ
クス等も用いられる。又、薄くして強度を持たせるため
に金属板とプラスチックの張り合わせた物も使用可能で
ある。更に、金属板をベースとして、金属部が露出しな
いように絶縁性樹脂で被覆した物も使用できる。The object of the present invention is achieved in an electrophotographic reversal developing device by configuring a guide plate that faces a counter electrode and constitutes a reversal developing section from a non-conductive structure. That is, the present invention is an electrophotographic wet reversal developing device in which an electrophotographic photoreceptor is passed between a counter electrode to which a bias voltage is applied and a guide plate made of a non-conductive structure, and reversal development is performed with a liquid developer. be. Furthermore, an electrophotographic printing plate having a metal support is charged,
After image exposure is applied to this, a developing device having a developing section equipped with at least a counter electrode and a guide plate made of a non-conductive structure performs reverse development with a liquid developer while applying a bias voltage to the counter electrode. This is a method for making an electrophotographic printing plate, which includes the steps of: Specific examples of the non-conductive structure include commercially available plastic plates, such as vinyl chloride plates, acrylic plates, nylon plates, polyethylene plates, polypropylene plates, DURACON plates, AQS plates, polycarbonate plates, Teflon plates, and Bakelite plates. etc. are used. Furthermore, earthenware, porcelain, ceramics, etc. are also used. Also, in order to make it thinner and stronger, it is also possible to use a material made by laminating a metal plate and plastic. Furthermore, it is also possible to use a material based on a metal plate coated with an insulating resin so that the metal part is not exposed.
次に本発明の詳細な説明するがこれらに限定されない。
実施例１
第１図は、本発明の断面概略図である。
図のガイド板３をテフロン板で製作した。大きさは、２
５ｃｍ（長さ）Ｘ５０ｃｍ （幅）とした。
電極板２の大きさも、２５ｃｍ（長さ）ｘ５０ｃｍ（幅
）である。液体現像剤８は現像剤供給部１からポンプ（
図示せず）によって毎分５リツトル供給した。アルミニ
ウム支持体上に酸化亜鉛を結合剤樹脂に分散した光導電
層を有する電子写真印刷版１３ａは、予めマイナスにコ
ロナチャージされ、ネガフィルムを介して密着露光した
。画像の面積率は、２０％とした。非画像部の表面電位
は、２５０ｖであった。
現像バイアス電源１０の電圧は、−８０Ｖとした。電子
写真印刷版１３ａの大きさは、Ａ−２とした。
電子写真印刷版１３ａの現像部通過速度を２ｍ／ ｍ
ｉ ｎとして、マイナスに帯電したトナー粒子を絶縁性
媒体液に分散した液体現像剤８で現像を行ったところ、
電子写真印刷版１３ａの裏面には、全くトナー現像が起
こらなかった。この様な操作を続けて１００版反転現像
を行い、現像剤８の固形分の減少を測定して、１版当り
のトナー消費量をｄ１算すると、２２ｍｇであった。こ
れらの電子写真印刷版は現像後、定着及び親水化処理し
て印刷を行ったところ何のトラブルもなく良好な印刷物
が得られた。
比較例として、第１図のガイド板をアルミ製にした他は
全〈実施例１と同様に行ったところ、電子写真印刷版１
３ａの裏面には、大量のトナー現像が確認され、絞りロ
ーラ７の表面に電子写真印刷版１３ａの裏面に付着した
未定着のトナーが付着して汚れた。電子写真印刷版１３
ａが絞りローラ対６．７を通過したあと、ローラフの表
面に付着しているトナーがローラ６の表面に転写して付
着し、このローラ６表面の未定着のトナーが後続の印刷
版の表面に付着して汚れとなり、印刷版として使用に耐
えないものであった。このトラブルを防止するにはその
都度絞りローラ対６．７を掃除する必要があった。又、
トナーの消費量は、８５ｍｇであった。本発明に比較し
て、約４倍のトナー消費であった。
実施例２
第１図において、電子写真印刷版１３ａとして、砂目室
てし陽極酸化したアルミニウム支持体上に無金属フタロ
シアニン顔料をアルカリ可溶性の結合剤樹脂に溶解・分
散した有機光導電層を塗設したものを使用した。予めプ
ラスにコロナチャージし、半導体レーザー光（７８０ｎ
ｍ）を用いて走査像露光した。次いでプラスに帯電した
トナー粒子を絶縁性媒体液に分散した液体現像剤８を使
用することとバイアス電圧を＋８０ｖにする以外は実施
例１と同じ条件で現像を行ったところ同様の結果を得た
。
次いで電子写真印刷版１３ａを定着し、アルカリ性溶出
液でトナー画像部以外の非画像部の有機光導電層を溶解
・除去（溶出）した後、ガム引きして印刷を行ったとこ
ろ、何のトラブルもなく良好な印刷物が得られた。Next, the present invention will be described in detail, but is not limited thereto. Example 1 FIG. 1 is a schematic cross-sectional view of the present invention. The guide plate 3 shown in the figure was made from a Teflon plate. The size is 2
It was set to 5 cm (length) x 50 cm (width). The size of the electrode plate 2 is also 25 cm (length) x 50 cm (width). The liquid developer 8 is supplied from the developer supply section 1 to a pump (
(not shown) supplied 5 liters per minute. An electrophotographic printing plate 13a having a photoconductive layer of zinc oxide dispersed in a binder resin on an aluminum support was previously negatively corona charged and contact exposed through a negative film. The area ratio of the image was 20%. The surface potential of the non-image area was 250V. The voltage of the developing bias power supply 10 was set to -80V. The size of the electrophotographic printing plate 13a was A-2. The speed at which the electrophotographic printing plate 13a passes through the developing section is 2 m/m.
When development was performed using a liquid developer 8 in which negatively charged toner particles were dispersed in an insulating medium liquid,
No toner development occurred on the back side of the electrophotographic printing plate 13a. Continuing such operations, reversal development was performed for 100 plates, and the decrease in solid content of the developer 8 was measured. The amount of toner consumed per plate was calculated as d1, and was found to be 22 mg. After development, these electrophotographic printing plates were subjected to fixing and hydrophilic treatment and then printed, and good printed matter was obtained without any trouble. As a comparative example, the same procedure as in Example 1 was carried out except that the guide plate in Fig. 1 was made of aluminum.
A large amount of toner development was confirmed on the back surface of the electrophotographic printing plate 13a, and the surface of the aperture roller 7 was stained with unfixed toner that had adhered to the back surface of the electrophotographic printing plate 13a. Electrophotographic printing plate 13
After passing through the squeezing roller pair 6.7, the toner adhering to the surface of the roller rough is transferred and adhering to the surface of the roller 6, and the unfixed toner on the surface of the roller 6 is transferred to the surface of the subsequent printing plate. The plate adhered to the plate and became smeared, making it unusable as a printing plate. In order to prevent this trouble, it was necessary to clean the squeezing roller pair 6.7 each time. or,
The amount of toner consumed was 85 mg. The toner consumption was approximately four times that of the present invention. Example 2 In FIG. 1, as the electrophotographic printing plate 13a, an organic photoconductive layer in which a metal-free phthalocyanine pigment is dissolved and dispersed in an alkali-soluble binder resin is coated on a grained and anodized aluminum support. I used what was set up. Corona charged to positive in advance, semiconductor laser light (780n)
Scanning image exposure was performed using m). Next, development was carried out under the same conditions as in Example 1, except that liquid developer 8 in which positively charged toner particles were dispersed in an insulating medium liquid was used and the bias voltage was increased to +80 V, and similar results were obtained. . Next, the electrophotographic printing plate 13a was fixed, and after dissolving and removing (eluting) the organic photoconductive layer in the non-image area other than the toner image area with an alkaline eluent, the printing was performed by gumming, and no problems were encountered. Good printed matter was obtained without any problems.
本発明によれば、このように、電子写真感光体の裏面に
全くトナー現像が生じない。又、トナー消費量が非常に
少ないので、現像剤のコスト低減の効果がある。更にト
ナーの剥離による搬送系の汚れが生じないため、メンテ
ナンスも容易である。According to the present invention, no toner development occurs on the back surface of the electrophotographic photoreceptor. Furthermore, since the amount of toner consumed is very small, there is an effect of reducing the cost of the developer. Furthermore, since the conveyance system is not contaminated due to toner peeling, maintenance is also easy.
第１図は、本発明の電子写真反転現像装置を用いて電子
写真感光体を反転現像中の、断面概略図である。第２図
は、従来方法の断面概略図である。
第３図は、従来方法を説明するための概略図である。
１：現像剤供給部、 ２：上部（対）電極板、３ニガイ
ド板、 ４．５：送りローラ対、６．７：絞りロ
ーラ対、 ８：現像剤、９：現像剤容器、 １０：現
像バイアス電源、１１．１２：バイアス給電片、
１３ａ：電子写真印刷版
１３ｂ：電子写真感光体、
１４：トナー粒子、 １５．１６：電気力線、１７：テ
グス、
￥ＩＩ￥１
蓼２１！１
’１３１．１FIG. 1 is a schematic cross-sectional view of an electrophotographic photosensitive member being subjected to reversal development using the electrophotographic reversal developing apparatus of the present invention. FIG. 2 is a schematic cross-sectional view of the conventional method. FIG. 3 is a schematic diagram for explaining the conventional method. 1: Developer supply section, 2: Upper (counter) electrode plate, 3 Ni guide plate, 4.5: Feeding roller pair, 6.7: Squeezing roller pair, 8: Developer, 9: Developer container, 10: Developing Bias power supply, 11.12: Bias power supply piece, 13a: Electrophotographic printing plate 13b: Electrophotographic photoreceptor, 14: Toner particles, 15.16: Lines of electric force, 17: Tegus, ¥II¥1 21!1' 131.1
Claims (1)
体構造物からなるガイド板との間を電子写真感光体を通
過させて液体現像剤で反転現像するようにした電子写真
湿式反転現像装置。 ２、金属製支持体を有する電子写真印刷版を帯電し、こ
れに像露光を与えた後、少なくとも対電極と非電導体構
造物からなるガイド板とを備えた現像部を有する現像装
置により、前記対電極にバイアス電圧を印加しながら液
体現像剤で反転現像する工程を有する電子写真印刷版の
製版方法。[Claims] 1. An electrophotographic photoreceptor is passed between a counter electrode to which a bias voltage is applied and a guide plate made of a non-conductive structure, and reverse development is performed with a liquid developer. Electrophotographic wet reversal developing device. 2. After charging an electrophotographic printing plate having a metal support and giving it image exposure, using a developing device having a developing section equipped with at least a counter electrode and a guide plate made of a non-conductor structure, A method for making an electrophotographic printing plate, comprising the step of performing reversal development with a liquid developer while applying a bias voltage to the counter electrode.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1-302471 | 1989-11-21 | ||
| JP30247189 | 1989-11-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03213885A true JPH03213885A (en) | 1991-09-19 |
Family
ID=17909349
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29843490A Pending JPH03213885A (en) | 1989-11-21 | 1990-11-02 | Electrophotographic wet type reversal developing device and plate making method for electrophotographic printing using the same |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPH03213885A (en) |
| DE (1) | DE4036976A1 (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3886900A (en) * | 1972-08-01 | 1975-06-03 | Cellophane Sa | Apparatus for developing a latent charged image |
| US3970043A (en) * | 1973-06-18 | 1976-07-20 | Xerox Corporation | Electrophotographic device for liquid development |
| US4521101A (en) * | 1982-06-18 | 1985-06-04 | Mitsubishi Paper Mills, Ltd. | Liquid developing apparatus for electrophotography |
| JPH0636114B2 (en) * | 1987-01-09 | 1994-05-11 | 三菱製紙株式会社 | Electrophotographic reversal developing device |
-
1990
- 1990-11-02 JP JP29843490A patent/JPH03213885A/en active Pending
- 1990-11-20 DE DE19904036976 patent/DE4036976A1/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| DE4036976A1 (en) | 1991-05-23 |
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