JPH03179467A - Wet system color electrophotographic copying device - Google Patents
Wet system color electrophotographic copying deviceInfo
- Publication number
- JPH03179467A JPH03179467A JP1319990A JP31999089A JPH03179467A JP H03179467 A JPH03179467 A JP H03179467A JP 1319990 A JP1319990 A JP 1319990A JP 31999089 A JP31999089 A JP 31999089A JP H03179467 A JPH03179467 A JP H03179467A
- Authority
- JP
- Japan
- Prior art keywords
- transfer paper
- developer
- photoreceptor
- belt
- color
- 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
- 108091008695 photoreceptors Proteins 0.000 claims description 57
- 230000003287 optical effect Effects 0.000 claims description 14
- 239000011521 glass Substances 0.000 claims description 6
- 239000003989 dielectric material Substances 0.000 claims description 2
- 239000007788 liquid Substances 0.000 abstract description 13
- 238000004140 cleaning Methods 0.000 abstract description 9
- 239000000203 mixture Substances 0.000 abstract 1
- 238000000926 separation method Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
Landscapes
- Mechanical Optical Scanning Systems (AREA)
- Wet Developing In Electrophotography (AREA)
- Color Electrophotography (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は複写機、プリンタ、ファクシミリ等の複数の感
光体を用いた湿式カラー電子写真装置に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a wet color electrophotographic apparatus using a plurality of photoreceptors, such as a copying machine, a printer, and a facsimile.
カラー電子写真装置としては、色分解情報に基づいて形
成された静電潜像を乾式現像剤又は液体現像剤を用いて
現像し、転写紙にトナー像を転写し定着する方法がすで
に知られている。As a color electrophotographic device, a method is already known in which an electrostatic latent image formed based on color separation information is developed using a dry developer or a liquid developer, and a toner image is transferred and fixed onto transfer paper. There is.
湿式現像剤を用いる方法は乾式現像剤を用いる方法に比
ベトナー粒径を極めて小さくすることができ、解像力、
トナー透明性などに優れており、高画質なカラー像が得
られるという利点がある。The method using a wet developer can make the toner particle size extremely small compared to the method using a dry developer, resulting in improved resolution and
It has the advantage of excellent toner transparency and the ability to obtain high-quality color images.
因みにトナー粒径は乾式現像剤では約ｌＯμｍであるの
に対し、湿式現像剤では１μｍ以下である。Incidentally, the toner particle size is about 10 μm in a dry type developer, whereas it is 1 μm or less in a wet type developer.
上記の利点を有する液体現像剤においては、流動性、粘
性などにおいて乾式現像剤に無い特性を有するために取
扱が難しく、特に複数の現像剤を要するカラー電子写真
においては多くの困難を伴う。Liquid developers having the above advantages are difficult to handle because they have properties such as fluidity and viscosity that dry developers do not have, and are particularly difficult to handle in color electrophotography, which requires a plurality of developers.
例えば特開昭５５−１２７５８０号公報によって知られ
ている装置の如く、１つの感光体ドラムの下方に各急用
の複数個の現像器を配置し、１色の分解色ごとに現像器
を移動させてカラー画像を形成させる装置では現像液の
粘性のために感光体の不要な部分にまで現像液が付着し
又流下し、転写部を汚染したり、転写後のクリーニング
現像液が感光体表面を流下し下方の現像器に混入しやす
く、現像液の混色を生したりするという問題がある。こ
の問題を解消するには感光体に現像液が不要に付着する
のを防止したり、クリーニング現像液を除去したり又そ
れを再生したりするために多大の装置や複雑な構造を必
要とし、コストが高くなるという問題があった。For example, in an apparatus known from Japanese Patent Application Laid-Open No. 55-127580, a plurality of developing devices for each urgent use are arranged below one photoreceptor drum, and the developing devices are moved for each separated color. In devices that form color images by using a device, the viscosity of the developer causes the developer to adhere to unnecessary parts of the photoreceptor and flow down, contaminating the transfer area, and cleaning the developer after transfer cleaning the surface of the photoreceptor. There is a problem in that it easily flows down and gets mixed into the developing device below, resulting in color mixing of the developing solution. To solve this problem, a large amount of equipment and complicated structures are required to prevent the developer from unnecessarily adhering to the photoreceptor, remove the cleaning developer, and regenerate it. There was a problem of high cost.
この従来の装置における混色等の問題は、特開平１−２
０６３７９号公報に開示さている複数の感光体を用い、
誘電体ヘルドにより搬送される転写紙に整合して各色の
湿式現像剤ムこよる画像を重ね転写する方法で解消する
ことができるが、転写紙が感光体の下側を転写されなが
ら移動する間に現像器やクリーニング部から流下する現
像液によって転写チャージ中等、転写部が汚染し、又感
光体の下方を走行する転写紙及び転写紙を搬送する搬送
ヘルドを汚染することが免れないという問題があった。Problems such as color mixing in this conventional device are discussed in Japanese Patent Application Laid-open No. 1-1-2.
Using a plurality of photoreceptors disclosed in Publication No. 06379,
This can be solved by aligning the transfer paper conveyed by a dielectric heddle and transferring the wet developer images of each color overlappingly, but while the transfer paper moves under the photoreceptor while being transferred, There is a problem in that the developer flowing down from the developing device or the cleaning section contaminates the transfer section such as the transfer charge, and also contaminates the transfer paper that runs below the photoreceptor and the transport heald that conveys the transfer paper. there were.
本発明は、上記の問題点を解消し、現像液やクリーニン
グ液によりいずれの部分も汚染されることなくカラー画
像形成のできる湿式カラー電信写真装置を提供すること
を課題としている。SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and to provide a wet-type color electrophotographic apparatus that can form color images without any part being contaminated by a developer or a cleaning solution.
本発明は、上記の課題を、直線状に並設された複数のｊ
３光体を有し、各感光体の４ｊＦ電、色分解された画像
情報によるレーザ露光、湿式現像により各分解色のトナ
ー像を形成し、該トナー像を転写紙上に逐次整合させて
重ね転写する湿式カラー電子写真装置において、前記複
数の感光体の上部を各感光体に接するようムこ延在する
誘電体ヘルドにより前記転写紙を搬送することを特徴と
する湿式カラー電子写真装置により解決した。The present invention solves the above problem by providing a plurality of j
It has three photoreceptors, and forms toner images of each separated color by 4JF electricity of each photoreceptor, laser exposure based on color-separated image information, and wet development, and the toner images are sequentially aligned on transfer paper and transferred in layers. The present invention has been solved by a wet color electrophotographic apparatus characterized in that the transfer paper is conveyed by a dielectric heald extending over the upper part of the plurality of photoreceptors so as to be in contact with each photoreceptor. .
更に本発明は上記の課題を、各感光体をレーザ露光する
レーザ露光光学系が各感光体の下方に配置され、該レー
ザ露光光学系を収容するハウジングのレーザ光出射口に
防塵ガラスが設けられていることを特徴とする湿式カラ
ー電子写真装置により解決した。Furthermore, the present invention solves the above-mentioned problem by disposing a laser exposure optical system for exposing each photoreceptor to laser light and disposing a dust-proof glass at a laser beam exit port of a housing that accommodates the laser exposure optical system. This problem was solved by a wet color electrophotographic device that is characterized by:
本発明により、複数の感光体に形成された各分解色の湿
式トナー像は各感光体の上端に接して延在する誘電体ベ
ルトに電気的に吸着されて搬送される転写紙に、各分解
色像が整合する状態で、重ね転写される。According to the present invention, wet toner images of each separated color formed on a plurality of photoreceptors are electrically attracted to a dielectric belt extending in contact with the upper end of each photoreceptor and transferred to a transfer paper for each separation. The color images are superimposed and transferred in a state where they are aligned.
感光体を露光するレーザ露光光学系は各感光体の下側に
配置されたハウジングに収容され、下から感光体を投射
して露光する。この露光により形成された潜像は感光体
の下側部分に対向配置された現像装置により現像され、
上端位置においてトナー像は転写紙に転写される。A laser exposure optical system for exposing the photoreceptors is housed in a housing disposed below each photoreceptor, and exposes the photoreceptor by projecting light from below. The latent image formed by this exposure is developed by a developing device placed opposite to the lower part of the photoreceptor.
At the upper end position, the toner image is transferred to the transfer paper.
本発明により、転写紙及び転写紙を搬送する搬送ヘルド
が感光体の上方を移動するので感光体上の現像液により
汚染されることが防止された。According to the present invention, since the transfer paper and the transport heald for transporting the transfer paper move above the photoreceptor, it is possible to prevent the photoreceptor from being contaminated by the developer.
〔実施例］ 本発明の詳細を図に示す実施例に基づいて説明する。〔Example] The details of the present invention will be explained based on embodiments shown in the drawings.
第１図において、レーザ露光光学系１と、該レーザ露光
光学系ｌより投射されるレーザ信号に基づいて画像形成
する画像形成部２と、該画像形成部２において形成され
た画像を転写するため転写紙を画像形成部２の上方で搬
送する搬送ヘルド装置３と各部を制御するコントロール
部４とを有する湿式カラー電子写真装置が示される。In FIG. 1, a laser exposure optical system 1, an image forming section 2 that forms an image based on a laser signal projected from the laser exposure optical system 1, and a device for transferring the image formed in the image forming section 2 are shown. A wet color electrophotographic apparatus is shown which includes a conveyor held device 3 that conveys transfer paper above an image forming section 2 and a control section 4 that controls each section.
レーザ露光光学系ｌは、色分解情報に応してコントロー
ル部において出射を制御された４つのレーザビームをポ
リゴンミラー５、ｆθレンズ６及び光路補正用兆う−７
を介して夫々の対応する感光体８に光点走査する。A laser exposure optical system 1 sends four laser beams whose output is controlled by a control unit according to color separation information to a polygon mirror 5, an fθ lens 6, and an optical path correction device 7.
A light spot is scanned onto each corresponding photoreceptor 8 via the photoreceptor.
画像形成部２には分解色用、例えばイエロー用、マゼン
タ用、シアン用、ブラック用の４個の感光体１１が等間
隔で直線状上に並設される。感光体１１は選択色によっ
ては４個でなく３個その他の数とすることもできる。各
感光体１１のまわりには画像形成作用を行うための各部
材が設けられるが夫々構成は同しであるので１つの感光
体についてのみ説明し、他は省略する。４つの感光体１
１は分解色別を表すＹ（イエロー）、Ｍ（マゼンタ）、
Ｃ（シアン）、Ｋ（ブランク）の添え字を符号に付して
識別し、各感光体のまわりに配置される同し部材に対応
するものには同し符号を付し、上記の添字を付してどの
感光体に対応するかを識別する。In the image forming section 2, four photoreceptors 11 for color separation, for example, yellow, magenta, cyan, and black, are arranged in a straight line at equal intervals. The number of photoreceptors 11 may be three or some other number instead of four depending on the selected color. Each photoreceptor 11 is provided with various members for performing an image forming function, but each member has the same structure, so only one photoreceptor will be described and the others will be omitted. 4 photoreceptors 1
1 indicates the separation color: Y (yellow), M (magenta),
The suffixes C (cyan) and K (blank) are added to the symbols to identify them, and those corresponding to the same members arranged around each photoreceptor are given the same symbols, and the above suffixes are replaced by the same symbols. to identify which photoreceptor it corresponds to.
各感光体１１のまわりには、例えばイエロー用感光体１
１Ｙのまわりには一様帝電を付す帯電札＋２Ｙ、光点走
査による画像露光部１３ｙ、液体現像装置１４Ｙ、転写
チャージャ＋５Ｙ、残留トナー像を／ＩＮ ｊｕｔ除去
ずろクリーニング部１６Ｙが配置される。For example, around each photoreceptor 11, there is a photoreceptor 1 for yellow.
Arranged around 1Y are a charge tag +2Y with uniform Teiden, an image exposure section 13y by light spot scanning, a liquid developing device 14Y, a transfer charger +5Y, and a cleaning section 16Y for removing residual toner images.
液体現像装置１４は例えば第２図に示すように液体現像
剤１７を収容する貯槽１８と、該貯槽１８内に配置され
液体現像剤１７を汲み出すポンプ１９と、該ポンプ１９
から液体現像剤を導くパイプ２０と、該パイプ２０によ
り導かれ感光体１１の潜像を現像するため液体現像剤を
噴出するノズル２１と、該ノズル２１から噴出される液
体現像剤を保持する現像剤受け２２と、液体トナー剤を
保持する感光体１１に対し所定の間隙を維持しながら高
速に回転して感光体１１の余剰現像液（キャリア液）を
除去すルリバースローラ２３とを有する。リバースロー
ラ２３は感光体１１に対向する面が感光体１１とは反対
方向に移動するように、すなわち逆回転される。The liquid developing device 14 includes, for example, as shown in FIG. 2, a storage tank 18 containing a liquid developer 17, a pump 19 disposed within the storage tank 18 and pumping out the liquid developer 17, and the pump 19.
A pipe 20 that guides liquid developer from the pipe 20, a nozzle 21 that is guided by the pipe 20 and ejects the liquid developer to develop the latent image on the photoreceptor 11, and a developer that holds the liquid developer that is ejected from the nozzle 21. It has a developer receiver 22 and a reverse roller 23 that rotates at high speed to remove excess developer (carrier liquid) from the photoreceptor 11 while maintaining a predetermined gap with respect to the photoreceptor 11 holding the liquid toner. The reverse roller 23 is rotated so that the surface facing the photoreceptor 11 moves in the opposite direction to the photoreceptor 11, that is, reversely rotated.
クリーニング部１６はフオームローラ２４とワイパーブ
レード２５とを有する。The cleaning section 16 has a form roller 24 and a wiper blade 25.
画像形成部２の上方に配置される搬送ヘルド装置３は駆
動ローラ２６と、従動ローラ２７と、両ローラ２６．２
７に巻掛けられる搬送ヘルド２Ｂとをイｉする。搬送ヘ
ルド２８は誘電体により形成される。The conveyance held device 3 disposed above the image forming section 2 includes a drive roller 26, a driven roller 27, and both rollers 26.2.
7 and the transport heald 2B wrapped around it. The transport heald 28 is made of dielectric material.
転写紙は、給紙ローラ２９により給紙され、コロナ放電
器３０より帯電された搬送ヘルド２８に静電吸着されて
搬送ヘルド２８の移動にしたがいイエロー用感光体１１
Ｙ、マゼンタ用感光体ｌＩＭ、シアン用感光体１１Ｇ、
ブランク用感光体１１にの各転写位置に逐次搬送されて
転写され、除電チャージャ３１により除電されて搬送ヘ
ルド２８から分離され、加熱ローラ３２と加圧ローラ３
３とをイｊする定着装置３４により定着され排出される
。転写紙を分離した搬送ヘルド２８は除電チャージャ３
５．３６によって各転写チャージャ１５による帯電電荷
及び静電吸着用帯電電荷の残留しているものを消散させ
、必要によっては図示しないヘルドクリーナによってク
リーニングした後初期化され元に戻る。The transfer paper is fed by a paper feed roller 29, is electrostatically attracted to a conveyance heald 28 charged by a corona discharger 30, and is transferred to the yellow photoreceptor 11 as the conveyance heald 28 moves.
Y, magenta photoconductor lIM, cyan photoconductor 11G,
It is sequentially conveyed and transferred to each transfer position on the blank photoreceptor 11, is neutralized by a static elimination charger 31, separated from the conveyance heald 28, and is transferred to a heating roller 32 and a pressure roller 3.
3 is fixed by the fixing device 34 and discharged. The transport heald 28 that separated the transfer paper is connected to the static elimination charger 3
At step 5.36, residual charges caused by each transfer charger 15 and charges for electrostatic adsorption are dissipated, and if necessary, after being cleaned by a heald cleaner (not shown), it is initialized and returned to its original state.
レーザ露光光学系ｌは画像形成部２の下部に配置されて
いるので、ポリゴンミラー５等の各光学系部材を収容す
るハウジング３７の各感光体１１へのレーザ光出射口３
８、すなわちイエロー用３８Ｙ、マゼンタ用３８Ｍ、シ
アン用３８Ｃ、プラック用３８Ｋには防塵ガラス３９が
設けられる。Since the laser exposure optical system l is disposed at the lower part of the image forming section 2, the laser beam exit port 3 to each photoreceptor 11 of the housing 37 that accommodates each optical system member such as the polygon mirror 5 is provided.
8, that is, 38Y for yellow, 38M for magenta, 38C for cyan, and 38K for plaque, are provided with dustproof glasses 39.
例えば第３図に示すようにハウジング３７の該当する位
置に突出部４０が形成され、該突出部４０にレーザ光出
射口３８が形成され、該レーザ光出射口３８に防塵ガラ
ス３９を支持するホルダー４■が設けられる。この防塵
ガラス３９を備えた防塵部４２により上部から現像液が
洩れてきたり飛散してきても、ハウジング３７内には浸
入することが防止される。For example, as shown in FIG. 3, a protrusion 40 is formed at a corresponding position of the housing 37, a laser beam exit port 38 is formed in the protrusion 40, and a holder supporting a dustproof glass 39 is provided in the laser light exit port 38. 4■ will be provided. Even if the developer leaks or scatters from the upper part, the dustproof part 42 provided with the dustproof glass 39 prevents it from entering the housing 37.
本装置により、レーザ露光光学系１よりのイエロー情報
によるビーム８Ｙがレーザ光出射口３８Ｙを通って感光
体１１Ｙに投射され、イエロー潜像が形成される。同様
にして感光体１１Ｍにマゼンタ潜像、感光体１１Ｃにシ
アン潜像、感光体ｌＩＫにプラック潜像が形成される。With this apparatus, a beam 8Y of yellow information from the laser exposure optical system 1 is projected onto the photoreceptor 11Y through the laser beam exit port 38Y, thereby forming a yellow latent image. Similarly, a magenta latent image is formed on the photoreceptor 11M, a cyan latent image is formed on the photoreceptor 11C, and a plaque latent image is formed on the photoreceptor 11K.
感光体１１Ｙのイエロー潜像は現像装置１４Ｙによりイ
エロー現像剤により現像され、転写チャージ中１５Ｙの
作用下で転写紙に転写される。転写紙は次いで感光体１
１Ｍよりマゼンタ像を、更に感光体１１Ｃよりシアン像
を、感光体１１Ｋによりプラック像を互いに整合した状
態で重ね転写される。転写チャージャ１５はイエロー用
１５Ｙ、マゼンタ用１５Ｍ、シアン用１５Ｃ、ブランク
用１５にと転写の順にしたがって徐々に転写電圧が増大
され転写が良好にｊテわれるようにしである。The yellow latent image on the photoreceptor 11Y is developed with a yellow developer by the developing device 14Y, and transferred to the transfer paper under the action of the developing device 15Y during transfer charging. The transfer paper is then transferred to the photoreceptor 1
A magenta image is transferred from the photoreceptor 1M, a cyan image is further transferred from the photoreceptor 11C, and a plaque image is transferred from the photoreceptor 11K in a mutually aligned state. The transfer voltage of the transfer charger 15 is gradually increased in the order of transfer, such as 15Y for yellow, 15M for magenta, 15C for cyan, and 15 for blank, to ensure good transfer.
４色の分解色像を重ね転写することによりフルカラー画
像が得られる。A full-color image is obtained by superimposing and transferring four separated color images.
搬送ヘルド２８は液体現像剤を保持する感光体に上側か
ら接する状態で転写紙を搬送するので転写紙は不必要な
部分に現像液が付着することがない。又現像液が転写紙
及び搬送ヘルドの上に流下し、篤染することも回避され
た。複数の色の異なる現像液は夫々側々の感光体に保持
され転写紙に過剰に現像液を付着させることもないので
、現像液の混色が防止可能になった。Since the conveyance heald 28 conveys the transfer paper while contacting the photoreceptor holding the liquid developer from above, the developer does not adhere to unnecessary portions of the transfer paper. Further, it was also possible to prevent the developer from flowing down onto the transfer paper and the conveyor heald, causing dark staining. Developers of a plurality of different colors are held on the respective side photoreceptors, and the developer does not adhere excessively to the transfer paper, making it possible to prevent color mixing of the developers.
〔効果］
本発明により、感光体のみによる画像形成の場合のよう
な現像液の混色が防止され、又複数の感光体を有する画
像形成部より上方を搬送ベルト及び転写紙が走ｊテする
ため、搬送ヘルド及び転写紙並びに転写チャージャが現
像液により汚染されることを特に複雑な装置や構成を必
要にすることなく防止することが可能になった。[Effects] According to the present invention, color mixing of the developer as in the case of image formation using only photoreceptors is prevented, and since the conveyor belt and transfer paper run above the image forming section having a plurality of photoreceptors. It has become possible to prevent the transport heald, the transfer paper, and the transfer charger from being contaminated by the developer without requiring particularly complicated devices or configurations.
第１図は本発明に係る湿式カラー電子写真装置の全体概
略図、第２図は１つの感光体に関連する部分の説明図、
第３図はレーザ露光光学系の一部の断面図である。
１・・・レーザ露光光学系
２・・・画像形成部 ３・・・搬送ヘルド装置ＩＩ
・・・感光体 １２・・・帯電器１４・・・湿式
現像器 １５・・・転写チャージャ１６・・・クリー
ニング部
２８・・・搬送ヘルド ３７・・・ハウジング３８・
・・レーザ光出射口
３９・・・防塵ガラスFIG. 1 is an overall schematic diagram of a wet color electrophotographic apparatus according to the present invention, FIG. 2 is an explanatory diagram of a portion related to one photoreceptor,
FIG. 3 is a cross-sectional view of a portion of the laser exposure optical system. 1... Laser exposure optical system 2... Image forming section 3... Conveyance held device II
... Photoreceptor 12 ... Charger 14 ... Wet type developer 15 ... Transfer charger 16 ... Cleaning section 28 ... Transport heald 37 ... Housing 38.
...Laser light exit port 39...dustproof glass
Claims (2)
体の帯電、色分解された画像情報によるレーザ露光、湿
式現像により各分解色のトナー像を形成し、該トナー像
を転写紙上に逐次整合させて重ね転写する湿式カラー電
子写真装置において、前記複数の感光体の上部を各感光
体に接するように延在する誘電体よりなる搬送ベルトに
より前記転写紙を搬送することを特徴とする湿式カラー
電子写真装置。(1) It has a plurality of photoconductors arranged in parallel in a straight line, and a toner image of each separated color is formed by charging each photoconductor, laser exposure based on color-separated image information, and wet development. In a wet color electrophotographic apparatus that sequentially aligns and transfers images onto a transfer paper in an overlapping manner, the transfer paper is conveyed by a conveyor belt made of a dielectric material that extends so that the upper part of the plurality of photoreceptors is in contact with each photoreceptor. A wet color electrophotographic device featuring:
が各感光体の下方に配置され、該レーザ露光光学系を収
容するハウジングのレーザ光出射口に防塵ガラスが設け
られていることを特徴とする請求項１に記載の湿式カラ
ー電子写真装置。(2) A laser exposure optical system for exposing each photoconductor to laser light is disposed below each photoconductor, and a dust-proof glass is provided at the laser beam exit port of the housing that accommodates the laser exposure optical system. A wet color electrophotographic apparatus according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1319990A JPH03179467A (en) | 1989-12-08 | 1989-12-08 | Wet system color electrophotographic copying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1319990A JPH03179467A (en) | 1989-12-08 | 1989-12-08 | Wet system color electrophotographic copying device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03179467A true JPH03179467A (en) | 1991-08-05 |
Family
ID=18116515
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1319990A Pending JPH03179467A (en) | 1989-12-08 | 1989-12-08 | Wet system color electrophotographic copying device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03179467A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5502557A (en) * | 1994-04-12 | 1996-03-26 | Samsung Electronics Co., Ltd. | Image forming apparatus |
| JP2005115296A (en) * | 2003-09-18 | 2005-04-28 | Ricoh Co Ltd | Optical scanner and image forming apparatus |
-
1989
- 1989-12-08 JP JP1319990A patent/JPH03179467A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5502557A (en) * | 1994-04-12 | 1996-03-26 | Samsung Electronics Co., Ltd. | Image forming apparatus |
| JP2005115296A (en) * | 2003-09-18 | 2005-04-28 | Ricoh Co Ltd | Optical scanner and image forming apparatus |
| JP4500526B2 (en) * | 2003-09-18 | 2010-07-14 | 株式会社リコー | Optical scanning apparatus and image forming apparatus |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5374980A (en) | Color image forming apparatus utilizing liquid development | |
| US6269231B1 (en) | Belt tension variation minimizing mechanism and a reproduction machine having same | |
| JPH04102874A (en) | Color image forming device | |
| US20060083538A1 (en) | Image forming apparatus | |
| US5220386A (en) | Image forming apparatus having cleanable transfer material carrying means | |
| JP3057121B2 (en) | Image forming device | |
| JP2000035737A (en) | Image forming device | |
| JPS63243970A (en) | Multi-color liquid developing apparatus | |
| JPH03179467A (en) | Wet system color electrophotographic copying device | |
| JP2843036B2 (en) | Color image forming equipment | |
| JP3025890B2 (en) | Image forming device | |
| US5202727A (en) | Multi-color image forming apparatus with black and white image forming mode | |
| JP3365698B2 (en) | Toner collection device | |
| US6687473B2 (en) | Method and apparatus for a non-contact direct transfer imaging system | |
| JP2577221B2 (en) | Image forming device | |
| JPH07210011A (en) | Image forming device | |
| JP4092056B2 (en) | Image forming apparatus | |
| JP3854709B2 (en) | Image forming apparatus | |
| KR100423459B1 (en) | color image forming apparatus | |
| JPH06102770A (en) | Transfer belt carrying device | |
| JP2002258626A (en) | Image forming device | |
| JP2002214998A (en) | Image forming device | |
| JPH1039654A (en) | Image forming device | |
| JPH0561307A (en) | Color image forming device | |
| JP2003270897A (en) | Image forming apparatus |