JPH04156487A - Wet type recording device - Google Patents
Wet type recording deviceInfo
- Publication number
- JPH04156487A JPH04156487A JP2281550A JP28155090A JPH04156487A JP H04156487 A JPH04156487 A JP H04156487A JP 2281550 A JP2281550 A JP 2281550A JP 28155090 A JP28155090 A JP 28155090A JP H04156487 A JPH04156487 A JP H04156487A
- Authority
- JP
- Japan
- Prior art keywords
- electrostatic latent
- developer
- latent image
- drum
- wet
- 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
- 239000007788 liquid Substances 0.000 abstract description 15
- 239000002245 particle Substances 0.000 abstract description 10
- 238000000034 method Methods 0.000 abstract description 8
- 230000005684 electric field Effects 0.000 abstract description 5
- 239000011343 solid material Substances 0.000 abstract 1
- 108091008695 photoreceptors Proteins 0.000 description 16
- 239000010410 layer Substances 0.000 description 12
- 230000000694 effects Effects 0.000 description 6
- 239000000919 ceramic Substances 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000001962 electrophoresis Methods 0.000 description 3
- 230000014759 maintenance of location Effects 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 210000000078 claw Anatomy 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 description 1
- 229920006311 Urethane elastomer Polymers 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000002579 anti-swelling effect Effects 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000002612 dispersion medium Substances 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002609 medium Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 229910052711 selenium Inorganic materials 0.000 description 1
- 239000011669 selenium Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、電子写真方式の複写機やプリンタ等で、絶縁
性キヤ＋７７液中に帯電したトナー粒子が分散して構成
される湿式現像剤を用いて、静電潜像を顕像化する湿式
記録装置に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention is applied to electrophotographic copying machines, printers, etc., using a wet developer composed of electrically charged toner particles dispersed in an insulating carrier +77 liquid. The present invention relates to a wet type recording device that visualizes an electrostatic latent image using.
［従来の技術］
従来の湿式記録装置では、現像剤を溜めた皿状の電極上
を、静電潜像担持体が通過し静電潜像担持体に現像剤が
塗布される方式（特公昭６２−５１４６６等）が知られ
ている。また、静電潜像担持体と微小間隙を介して対向
する電極板に設けられた溝状の開口部分から現像剤が吐
出され、静電潜像担持体と、電極板とで作る電界に応じ
て、帯電粒子が付着し、現像される方式（実開昭６３−
８４３９４等）が知られている。[Prior Art] In conventional wet recording devices, an electrostatic latent image carrier passes over a plate-shaped electrode in which developer is stored, and the developer is applied to the electrostatic latent image carrier. 62-51466 etc.) are known. In addition, the developer is discharged from a groove-shaped opening provided in the electrode plate that faces the electrostatic latent image carrier through a small gap, and responds to the electric field created by the electrostatic latent image carrier and the electrode plate. A method in which charged particles are attached and developed
84394 etc.) are known.
［発明が解決しようとする課題１
従来の湿式記録装置では、湿式現像剤のｉナー（一般に
は顔料、樹脂からなる帯電トナー粒子）の静電潜像担持
体への付着が電気泳動によって行なわれる。このため、
現像に当たって、多量の現像剤を必要とするという問題
点を有していた。すなわち、電気泳動速度は、現像剤の
粘度に依存するため、必要な電気泳動速度を得るために
は、現像剤の粘度を低く保つ必要があり、そのために、
前記帯電トナー粒子を大量のキャリア液中に分散し、低
粘度現像剤とする必要があったためである。[Problem to be Solved by the Invention 1] In conventional wet-type recording devices, the adhesion of i-ner (charged toner particles generally made of pigment and resin) of a wet-type developer to an electrostatic latent image carrier is carried out by electrophoresis. . For this reason,
There was a problem in that a large amount of developer was required for development. That is, the electrophoresis speed depends on the viscosity of the developer, so in order to obtain the required electrophoresis speed, it is necessary to keep the viscosity of the developer low.
This is because it is necessary to disperse the charged toner particles in a large amount of carrier liquid to form a low-viscosity developer.
このキャリア液は記録紙上の最終画像形成には与らない
ため、蒸発させたり、回収して廃棄したりする必要があ
った。Since this carrier liquid does not participate in the final image formation on the recording paper, it was necessary to evaporate it or collect it and dispose of it.
本発明の目的は、この問題を解決し、現像に要する現像
剤の量を減少させ小量の現像剤で、現像の可能な湿式記
録装置を実現することである。An object of the present invention is to solve this problem, reduce the amount of developer required for development, and realize a wet-type recording device that can perform development with a small amount of developer.
［課題を解決するための手段］
本発明の湿式記録装置は、静電潜像担持体上の静電潜像
を、湿式現像剤で現像し、トナー像を得る湿式記録装置
において、
静電潜像担持体、
一定電位に保たれた導電部と、前記静電潜像担持体と当
接する弾性層からなる弾性ドラムを有し、前記静電潜像
担持体と前記弾性ドラムとの当接部に、上記湿式現像剤
を供給し、前記静電潜像担持体上の静電潜像に応じて、
前記弾性ドラム上にトナー像を形成する如く構成し方こ
とことを特徴とする。[Means for Solving the Problems] The wet recording device of the present invention develops an electrostatic latent image on an electrostatic latent image carrier with a wet developer to obtain a toner image. An image carrier, comprising an elastic drum made up of a conductive part kept at a constant potential and an elastic layer that comes into contact with the electrostatic latent image carrier, and a contact part between the electrostatic latent image carrier and the elastic drum. , the wet developer is supplied, and depending on the electrostatic latent image on the electrostatic latent image carrier,
It is characterized in that it is configured to form a toner image on the elastic drum.
［作用コ
本発明の湿式記録装置においては、静電潜像担持体に、
湿式現像剤が機械的な力で塗布される。[Function] In the wet recording apparatus of the present invention, the electrostatic latent image carrier has
Wet developer is applied by mechanical force.
静電潜像担持体と弾性ドラムとの当接部では、静電潜像
に応じて大量な電界が作用する。このため、湿式現像剤
を大量のキャリア液によって、低粘度、高移動度状態に
保つ必要がない。At the contact portion between the electrostatic latent image carrier and the elastic drum, a large amount of electric field acts depending on the electrostatic latent image. Therefore, there is no need to maintain the wet developer in a low viscosity, high mobility state with a large amount of carrier liquid.
［実施例］ 本発明の実施例について、説明する。[Example] Examples of the present invention will be described.
第３図は、本発明の第１の実施例である、湿式現像装置
を備えた電子写真プリンタの断面図である。FIG. 3 is a sectional view of an electrophotographic printer equipped with a wet developing device, which is a first embodiment of the present invention.
感光体ドラム１の周囲に帯電装置２、露光装置３、湿式
現像装置（Ｊ′Ｉ下現像現像装置記す）４、剥離爪６を
備えた弾性ドラム５、クリーニングバッド７が順次配置
されている。A charging device 2, an exposure device 3, a wet developing device (referred to as a developing device under J'I) 4, an elastic drum 5 equipped with a peeling claw 6, and a cleaning pad 7 are arranged in this order around the photosensitive drum 1.
静電潜像担持体である感光体ドラム１は、第１図に示す
ように、アルミ素管１００の周囲にアモルファスセレン
感光層１０１が蒸着されたものである。矢印Ａの方向に
回転するように構成されている。As shown in FIG. 1, the photosensitive drum 1, which is an electrostatic latent image carrier, has an amorphous selenium photosensitive layer 101 deposited around an aluminum tube 100. It is configured to rotate in the direction of arrow A.
現像装置４の構成を第１図に示す。現像スリット７２を
有し、湿式現像剤塗布手段をなす、現像ヘッド５５が、
スリット開口１１１を弾性ドラム５に向けて設けられて
いる。弾性ドラム５は、金属素管１１２に弾性層１１６
を有する。これは、導電性コンパウンドを分散した導電
性ウレタンゴムからなる導電層１１３、更に最外層にフ
ッ素樹脂コート層からなる絶縁層１１４からなり、感光
体ドラム１に対し、押圧力を受けて当接し、感光体ドラ
ム１と同一速度で矢印Ｂの方向に回転する。The configuration of the developing device 4 is shown in FIG. A developing head 55 having a developing slit 72 and serving as a wet developer application means,
The slit opening 111 is provided facing the elastic drum 5. The elastic drum 5 includes an elastic layer 116 on a metal tube 112.
has. This consists of a conductive layer 113 made of conductive urethane rubber in which a conductive compound is dispersed, and an insulating layer 114 made of a fluororesin coating layer as the outermost layer, and comes into contact with the photoreceptor drum 1 under pressure. It rotates in the direction of arrow B at the same speed as the photosensitive drum 1.
現像ヘッド５５には、第２図に示すような構成で湿式現
像剤（以下現像剤とも記す）が供給される。すなわち、
湿式現像剤５６が充される現像スリット７２に、現像剤
容器５１から、供給ポンプ５７により現像剤５６が矢印
Ｇの様に送られ供給される。A wet type developer (hereinafter also referred to as developer) is supplied to the developing head 55 in a configuration as shown in FIG. That is,
The developer 56 is fed from the developer container 51 by the supply pump 57 in the direction of arrow G and is supplied to the development slit 72 filled with the wet developer 56 .
現像ヘッド５５は、金属板１２２と圧電セラミック板１
２１を、ギャップ材１２５を介して積層して接合されて
いる。圧電セラミック板１２１の両側には電極１２３．
１２４が設けられている。The developing head 55 includes a metal plate 122 and a piezoelectric ceramic plate 1.
21 are laminated and joined via a gap material 125. Electrodes 123 are provided on both sides of the piezoelectric ceramic plate 121.
124 are provided.
現像スリット７２には、供給された湿式現像剤５６が、
毛細管力で保持される。The wet developer 56 supplied to the development slit 72 is
held by capillary force.
湿式現像剤は、分散媒である高抵抗石油系溶媒（例えば
エッソ社製、アイソパー）中に、顔料とアクリル樹脂か
らなる［・ナー粒子を、−！１を電制膨剤、分散安定剤
とともに分散して構成されている。このような現像剤は
、例えば米国特許公報中３９００６１２等に示されてい
る。本実施例の装置においては正帯電トナー粒子を用い
ている。A wet developer consists of pigment and acrylic resin particles in a high-resistance petroleum-based solvent (for example, Isopar, manufactured by Esso) as a dispersion medium. 1 is dispersed with an anti-swelling agent and a dispersion stabilizer. Such a developer is shown in, for example, US Pat. No. 3,900,612. The apparatus of this embodiment uses positively charged toner particles.
次に動作について説明する。Next, the operation will be explained.
まず画像形成プロセスを説明する。帯電装置２では高電
圧を印加した導電性ゴムローラを感光体ドラム１に接触
させ感光体ドラム１を正電位に帯電させる。露光工程で
は、レーザービームスキャナーからなる露光装置３で感
光体ドラム１を選択的に露光し、露光部分の電荷を中和
させる。この結果得られた感光体ドラム１上の静電潜像
に応じて、後述するように、弾性ドラム５上にトナー像
が形成される。First, the image forming process will be explained. In the charging device 2, a conductive rubber roller to which a high voltage is applied is brought into contact with the photoreceptor drum 1, and the photoreceptor drum 1 is charged to a positive potential. In the exposure step, the photoreceptor drum 1 is selectively exposed to light by an exposure device 3 consisting of a laser beam scanner to neutralize the electric charge in the exposed portion. Depending on the electrostatic latent image thus obtained on the photoreceptor drum 1, a toner image is formed on the elastic drum 5, as will be described later.
給紙装置２０より搬出された記録媒体である記録紙２１
が、トナー像の形成に合わせて、転写領域に搬送される
。圧力ローラ９で加圧されて、 トナー像が弾性ドラム
５から記録紙２］、に転写される。Recording paper 21 which is a recording medium carried out from paper feeding device 20
is transported to the transfer area in accordance with the formation of the toner image. Pressurized by a pressure roller 9, the toner image is transferred from the elastic drum 5 onto the recording paper 2.
記録紙２１は、転写工程を経た後、剥離爪６により弾性
ドラム５から剥離され、排紙装置１０により排紙トレイ
２２に収納される。転写工程を経て感光体ドラム１は、
クリーナパッド７で表面の汚染を清浄化し、離型剤を塗
布し、再び帯電工程に入る。After the recording paper 21 has undergone the transfer process, it is peeled off from the elastic drum 5 by the peeling claw 6 and stored in the paper discharge tray 22 by the paper discharge device 10. After the transfer process, the photoreceptor drum 1 is
The surface is cleaned of contamination with a cleaner pad 7, a release agent is applied, and the charging process is started again.
次に現像動作を説明する。第１図に第１の実施例である
湿式現像装置４の構成を示す。感光体ドラム１は、先述
のように、表面を正電荷で一様帯電され、正の表面電位
（本実施例では＋５００Ｖ）を有し、露光工程を経て、
露光部１０５は略グランド電位（例えば＋４０■）、非
露光部１０４は正電位（本実施例では＋５００Ｖ）を持
ち現像装置４に入る。現像スリット７２から湿式現像剤
が液滴となって吐出され、弾性ドラム５上に塗布される
。これにより、帯電トナー粒子がわずかなキャリア液を
伴って湿潤状態で弾性ドラム５上の層状に付着する。弾
性ドラム５ば、電源１０２により非露光部の正電位より
低い値の正電位（本実施例では＋５０■）に保たれてい
る。感光体ドラム］」二の湿式現像剤層１０６は、正電
荷を有するため、感光体ドラム１との当接部を通過する
際、静電力に応じて、露光部においては、感光体ドラム
１に向け、非露光部に置いては弾性ドラム５に向けて力
を受ける。この結果、非露光部には現像剤層］０９が付
着する。一方、露光部１．０７は、現像剤が、感光体ド
ラム］に付着するよう静電力が作用するが、上記の電位
関係によって、感光体ドラム］と現像剤との間の吸引力
は大きくないため、当接部の押圧力により絞り作用を受
けて剥離、除去されて、当接部の上流側の滞留部１１５
に滞留する。滞留部１］５に滞留する現像剤量は時間と
ともに増加し一定以上の量に達すると重力によって自然
流下し、湿式現像装置下部１］−〇に導かれ、現像剤容
器５］に回収される。Next, the developing operation will be explained. FIG. 1 shows the structure of a wet type developing device 4, which is a first embodiment. As described above, the surface of the photoreceptor drum 1 is uniformly charged with a positive charge, has a positive surface potential (+500V in this example), and after the exposure process,
The exposed portion 105 enters the developing device 4 with a substantially ground potential (for example, +40 V), and the non-exposed portion 104 with a positive potential (+500 V in this embodiment). The wet developer is discharged from the development slit 72 in the form of droplets and applied onto the elastic drum 5. As a result, the charged toner particles are deposited in a wet layer on the elastic drum 5 together with a small amount of carrier liquid. The elastic drum 5 is maintained by a power source 102 at a positive potential that is lower than the positive potential of the non-exposed area (+50 in this embodiment). Photoreceptor Drum] Since the second wet developer layer 106 has a positive charge, when it passes through the contact area with the photoreceptor drum 1, it is applied to the photoreceptor drum 1 in the exposed area according to the electrostatic force. When placed in a non-exposed area, a force is applied toward the elastic drum 5. As a result, the developer layer]09 is attached to the non-exposed area. On the other hand, in the exposed area 1.07, electrostatic force acts so that the developer adheres to the photoreceptor drum, but due to the above potential relationship, the attraction force between the photoreceptor drum and the developer is not large. Therefore, it is peeled off and removed by the squeezing action due to the pressing force of the contact part, and the retention part 115 on the upstream side of the contact part
stay in. The amount of developer staying in the retention section 1]5 increases with time, and when it reaches a certain amount, it naturally flows down due to gravity, is guided to the lower part of the wet developing device 1]-〇, and is collected in the developer container 5]. .
本発明者らの実験では、固形分濃度（定義は下に示す）
１０〜３０％の湿式現像剤を用いて、約１００μｍの厚
さに一様塗布された現像剤層１０６は、感光体ドラム１
との当接部を通過後、弾性ドラム５．１−で約５μｍの
湿式現像剤層１０９を形成した。非１■■像部にはキャ
リア液が残留することがなかった。従って、従来の湿式
記録装置で用いられるような、スクイズ機構等は必要と
ぜず、地かぶりの無いｌ・ナー像が得られる。このｌ・
ナー像を、上述の転写工程を経て記録紙２１に転写し、
記録紙上で約２μｍの厚さのトナー像が得られた。In our experiments, the solid content concentration (definition is shown below)
The developer layer 106 is uniformly coated to a thickness of about 100 μm using 10 to 30% wet developer.
After passing through the contact portion with the elastic drum 5.1-, a wet developer layer 109 of about 5 μm was formed on the elastic drum 5.1-. No carrier liquid remained in the non-1■■ image area. Therefore, there is no need for a squeeze mechanism, etc., as used in conventional wet-type recording apparatuses, and an L/ner image without background fog can be obtained. This l・
The toner image is transferred to the recording paper 21 through the above-described transfer process,
A toner image with a thickness of about 2 μm was obtained on the recording paper.
固形分濃度＝（（湿式現像剤重量）−
（キャリア液重量））／（キャリア液重量）現像ヘッド
５５の動作を、第２図を用いて説明する。圧電セラミッ
ク板１２］と金属板１２２は、微小空隙りを隔てて対向
する。圧電セラミック板１２１は両側に電極１２３．１
２４を有し、この間に高周波電圧を印加すると、矢印Ｆ
の方向に伸縮する。本実施例−〇は、圧電セラミック板
１２１として、板厚Ｅが１．ｍｍのＰ Ｚ ’Ｉ’を用
い、２０μｍの間隙りに湿式現像剤５６を供給し、１，
８ＭＨ２″Ｃ″駆動し、矢印Ｆ方向に加振し湿式現像剤
５６を微小液滴として、霧化し、飛翔させている。Solid content concentration=((wet developer weight)-(carrier liquid weight))/(carrier liquid weight) The operation of the developing head 55 will be explained using FIG. 2. The piezoelectric ceramic plate 12] and the metal plate 122 face each other with a small gap in between. The piezoelectric ceramic plate 121 has electrodes 123.1 on both sides.
24, and when a high frequency voltage is applied between them, the arrow F
It expands and contracts in the direction of . In this embodiment-〇, the piezoelectric ceramic plate 121 has a plate thickness E of 1. Wet developer 56 is supplied to a gap of 20 μm using P Z 'I' of 1.
8MH2''C'' is driven and vibrated in the direction of arrow F to atomize and fly the wet type developer 56 into fine droplets.
現像剤容器５１の湿式現像剤５６は、ポンプ５７によっ
て供給され、現像ヘッド５５の現像スリット７２を充す
。印刷動作中は一定の量の現像剤を連続的に供給する。The wet developer 56 in the developer container 51 is supplied by a pump 57 and fills the development slit 72 of the development head 55 . A fixed amount of developer is continuously supplied during the printing operation.
第２の実施例を第４図に示す。感光体ドラム１と弾性ド
ラム５及び、両者の当接部に現像剤を供給する現像ヘッ
ド５５と関連部材のみを示す。他の部材は、先の実施例
と同様であり、説明は省略する。湿式現像剤５６を収納
する現像剤容器５１に現像ヘッド５５が接続されている
。現像剤容器５１内の現像剤５６は吐出用ポンプ２０１
によって、矢印工で示すように搬送され、吐出部２０４
から吐出される。感光体ドラム１と弾性ドラム５の当接
部に滞留する現像剤は吸引部２０３から、吸引用ポンプ
２０２によって吸引され、矢印Ｊて示すように搬送され
、現像剤容器５１に回収される。現像ヘッド５５は矢印
Ｇの方向に走査し、当接部全域に現像剤を供給する。こ
れによって、当接部には適正量の現像剤が供給される。A second embodiment is shown in FIG. Only the photoreceptor drum 1, the elastic drum 5, the developing head 55 that supplies developer to the contact portion between them, and related members are shown. The other members are the same as those in the previous embodiment, and their explanation will be omitted. A developing head 55 is connected to a developer container 51 containing a wet type developer 56 . The developer 56 in the developer container 51 is discharged by a discharge pump 201.
is conveyed as shown by the arrow, and is delivered to the discharge section 204.
It is discharged from. The developer remaining at the abutting portion of the photosensitive drum 1 and the elastic drum 5 is sucked from the suction section 203 by the suction pump 202, transported as shown by arrow J, and collected in the developer container 51. The developing head 55 scans in the direction of arrow G and supplies developer to the entire contact area. As a result, an appropriate amount of developer is supplied to the contact portion.
本実施例に示した感光体ドラムを用いた湿式記録装置で
は、従来の装置のように、転写残りトナー像を除去する
ために、クリーニング装置によって表面を圧力を印加し
ながら擦過させる必要が無い。また、感光体ドラムは記
録紙と直接接触しない。従って感光体ドラムの機械的摩
耗が小さく、寿命が向上するという効果を有する。In the wet recording apparatus using the photosensitive drum shown in this embodiment, unlike conventional apparatuses, there is no need for the surface to be rubbed while applying pressure by a cleaning device in order to remove the untransferred toner image. Further, the photosensitive drum does not come into direct contact with the recording paper. Therefore, there is an effect that mechanical wear of the photoreceptor drum is reduced and its life is improved.
また、弾性ドラム上のトナー像は、キャリア液を多く含
まず、転写後の記録紙に転移するキャリア液量は微量で
ある。従って、加熱してキャリア液を蒸発させる必要が
無い。このため、熱定着装置等を設ける必要がなく、消
費電力の低減が可能であるという効果を有する。Further, the toner image on the elastic drum does not contain much carrier liquid, and the amount of carrier liquid transferred to the recording paper after transfer is very small. Therefore, there is no need to evaporate the carrier liquid by heating. Therefore, there is no need to provide a heat fixing device or the like, and there is an effect that power consumption can be reduced.
［発明の効果１
本発明によれば、湿式現像剤は、現像ヘッドから微小液
滴として、霧化し吐出されて、静電潜像担持体に塗布さ
れる。又、静電潜像担持体と弾性ドラムとの当接部で、
両者の間の微小間隙を通過する際、静電潜像に応じて大
きな電界が作用する。[Advantageous Effects of the Invention 1] According to the present invention, the wet developer is atomized and discharged as minute droplets from the development head, and is applied to the electrostatic latent image carrier. In addition, at the contact portion between the electrostatic latent image carrier and the elastic drum,
When passing through the minute gap between the two, a large electric field acts according to the electrostatic latent image.
このため、固体分濃度の大きい現像剤によっても現像が
可能になる。従って、従来技術において、帯電トナー粒
子がキャリア液中を電気泳動によって移動して、静電潜
像担持体に付着する場合のように、現像剤を低粘度に保
つ必要がない。このため、像形成に要する現像剤の量を
減少させ、小量の現像剤で現像の可能な湿式記録装置を
実現することができるという効果を有する。更に高粘度
現像剤による現像が可能な湿式現像装置を実現すること
ができるという効果を有する。Therefore, development is possible even with a developer having a high solid content concentration. Therefore, there is no need to maintain the developer at a low viscosity, as in the prior art, when charged toner particles move electrophoretically in a carrier liquid and adhere to an electrostatic latent image carrier. Therefore, it is possible to reduce the amount of developer required for image formation and to realize a wet type recording apparatus that can perform development with a small amount of developer. Furthermore, there is an effect that it is possible to realize a wet type developing device that can perform development using a high viscosity developer.
さらに、非画像部に、キャリア液が付着してこないため
、従来の湿式記録装置のような、スクイズ機構を必要と
しない。また、従来の装置においては、静電潜像担持体
と対向して設けられる現像電極の間の間隙の値で、生ず
る現像電界の大きさが変化するため、この間隙寸法を精
度良く管理する必要があった。本発明の装置では、静電
潜像担持体と弾性ドラムは押圧力を受けて当接するため
、両者間に微小間隙寸法管理する必要がない。これらの
ことから、装置の機構的な簡略化できるという効果も有
する。Furthermore, since the carrier liquid does not adhere to the non-image area, there is no need for a squeeze mechanism as in conventional wet recording apparatuses. In addition, in conventional devices, the magnitude of the developing electric field that is generated changes depending on the value of the gap between the developing electrodes provided facing the electrostatic latent image carrier, so it is necessary to control this gap dimension with precision. was there. In the apparatus of the present invention, since the electrostatic latent image carrier and the elastic drum come into contact with each other under pressure, there is no need to control the size of a minute gap between them. For these reasons, there is also the effect that the device can be mechanically simplified.
また従来の湿式記録装置に於て、感光体ドラム上のトナ
ー像を記録紙に転写する場合、トナー像の画質劣化が生
じ、平滑な記録紙以外では、転写が困難であった。本発
明の湿式記録装置では、トナー像は弾性を有する部材上
に形成されるため、これを記録紙と接触させると、記録
紙との密着性がよいため、良好な画質の転写が可能であ
るという効果も有する。Furthermore, in conventional wet-type recording apparatuses, when a toner image on a photoreceptor drum is transferred to recording paper, the image quality of the toner image deteriorates, and transfer is difficult on anything other than smooth recording paper. In the wet type recording device of the present invention, since the toner image is formed on an elastic member, when this is brought into contact with the recording paper, it has good adhesion to the recording paper, so that transfer of good image quality is possible. It also has this effect.
第１図は、本発明の第１の実施例である湿式記録装置を
構成する湿式現像装置の断面図。
第２図は、本発明の第１の実施例である湿式現像装置を
構成する現像ヘッドの構造を示す斜視図。
第３図は、本発明の第１の実施例である湿式記録装置の
断面図。
第４図は、本発明の第２の実施例を示す湿式記録装置に
用いられる現像装置の構成を示す斜視図。
感光体ドラム（静電潜像担持体）
湿式現像装置 ４
現像剤容器 ５１
現像ヘッド ５５
現像スリット ７２
弾性ドラム ５
湿式現像剤 ５６
弾性層 １１６
滞留部 １１５
以上
出願人 セイコーエプソン株式会社
代理人弁理士 鈴木喜三部 他１名
１２’ｌ ／、≦でヤ→ｚ
４，５昌Ｚく多／
−一（ワ７
特開平４、、、、、−１．５６４８７ （７）／FIG. 1 is a sectional view of a wet type developing device constituting a wet type recording apparatus according to a first embodiment of the present invention. FIG. 2 is a perspective view showing the structure of a developing head that constitutes a wet type developing device according to a first embodiment of the present invention. FIG. 3 is a cross-sectional view of a wet recording device according to a first embodiment of the present invention. FIG. 4 is a perspective view showing the configuration of a developing device used in a wet type recording apparatus showing a second embodiment of the present invention. Photoreceptor drum (electrostatic latent image carrier) Wet type developing device 4 Developer container 51 Developing head 55 Developing slit 72 Elastic drum 5 Wet type developer 56 Elastic layer 116 Retention part 115 Applicant Seiko Epson Co., Ltd. Representative Patent Attorney Suzuki Kisanbe and 1 other person 12'l /, ≦ ya → z 4,5 sho Z many / -1 (wa 7 JP-A-4, ,,, -1.56487 (7) /
Claims (1)
トナー像を得る湿式記録装置において、静電潜像担持体
、 一定電位に保たれた導電部と、前記静電潜像担持体と当
接する弾性層からなる弾性ドラムを有し、前記静電潜像
担持体と前記弾性ドラムとの当接部に、上記湿式現像剤
を供給し、前記静電潜像担持体上の静電潜像に応じて、
前記弾性ドラム上にトナー像を形成する如く構成したこ
とを特徴とする湿式記録装置。[Claims] Developing an electrostatic latent image on an electrostatic latent image carrier with a wet developer,
A wet recording device for obtaining a toner image includes an electrostatic latent image carrier, an elastic drum made up of a conductive portion kept at a constant potential, and an elastic layer in contact with the electrostatic latent image carrier, and the electrostatic latent image carrier The wet developer is supplied to the contact portion between the image carrier and the elastic drum, and depending on the electrostatic latent image on the electrostatic latent image carrier,
A wet type recording device characterized in that it is configured to form a toner image on the elastic drum.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2281550A JPH04156487A (en) | 1990-10-19 | 1990-10-19 | Wet type recording device |
| US07/775,130 US5387760A (en) | 1990-10-19 | 1991-10-11 | Wet recording apparatus for developing electrostatic latent image |
| EP91117841A EP0481516B1 (en) | 1990-10-19 | 1991-10-18 | Wet development apparatus and method |
| DE69122019T DE69122019T2 (en) | 1990-10-19 | 1991-10-18 | Wet development device and method |
| KR1019910018462A KR950003314B1 (en) | 1990-10-19 | 1991-10-19 | Wet development apparatus, wet recording apparatus and wet recording method |
| US08/296,416 US5434352A (en) | 1990-10-19 | 1994-08-26 | Wet recording apparatus for developing electrostatic latent images |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2281550A JPH04156487A (en) | 1990-10-19 | 1990-10-19 | Wet type recording device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04156487A true JPH04156487A (en) | 1992-05-28 |
Family
ID=17640746
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2281550A Pending JPH04156487A (en) | 1990-10-19 | 1990-10-19 | Wet type recording device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04156487A (en) |
-
1990
- 1990-10-19 JP JP2281550A patent/JPH04156487A/en active Pending
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