JPH0451055A - Electrostatic recordor - Google Patents
Electrostatic recordorInfo
- Publication number
- JPH0451055A JPH0451055A JP15934990A JP15934990A JPH0451055A JP H0451055 A JPH0451055 A JP H0451055A JP 15934990 A JP15934990 A JP 15934990A JP 15934990 A JP15934990 A JP 15934990A JP H0451055 A JPH0451055 A JP H0451055A
- Authority
- JP
- Japan
- Prior art keywords
- recording
- electrode
- voltage
- developer
- cylindrical electrode
- 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
- 238000004140 cleaning Methods 0.000 claims abstract description 23
- 238000012546 transfer Methods 0.000 claims description 13
- 238000009413 insulation Methods 0.000 claims 1
- 238000001454 recorded image Methods 0.000 abstract description 20
- 238000010292 electrical insulation Methods 0.000 abstract description 2
- 230000032258 transport Effects 0.000 description 10
- 230000005284 excitation Effects 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 230000007547 defect Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 230000002093 peripheral effect Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000007790 scraping Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000011144 upstream manufacturing Methods 0.000 description 4
- 210000000078 claw Anatomy 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 230000005684 electric field Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 210000005069 ears Anatomy 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000002123 temporal effect Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000012840 feeding operation Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 210000003127 knee Anatomy 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 229910000889 permalloy Inorganic materials 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Landscapes
- Electrophotography Using Other Than Carlson'S Method (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明は、記録ヘッドと記録媒体とを接触させずに静電
記録画像を形成する非接触式静電記録装置に関するもの
である。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a non-contact electrostatic recording device that forms an electrostatically recorded image without bringing a recording head into contact with a recording medium.
従来、静電記録装置の一つとして、マルチスタイラスプ
リンタがよく知られている。このマルチスタイラスプリ
ンタは、多数の針状の記録電極を主走査方向へ微小等間
隔に並べて記録ヘッドを構成し、記録信号に応じて各針
状電極に電圧を選択的に印加し、用紙上に直接放電を行
なって静電潜像を形成するものである。この場合、用紙
上に電荷を容易且つ安定的に保持できる様に、高電気抵
抗剤を塗布した特殊紙を使用する。しかし、この様な特
殊紙は、鉛筆やペンによる記入性が悪（、又、湿度等の
環境条件に依って変質するから保存性にも問題があり、
事務用の用紙としては好ましくない。Conventionally, a multi-stylus printer is well known as one of electrostatic recording devices. This multi-stylus printer constructs a recording head by arranging a large number of needle-shaped recording electrodes at evenly spaced intervals in the main scanning direction, and selectively applies voltage to each needle-shaped electrode according to the recording signal to print on the paper. An electrostatic latent image is formed by direct discharge. In this case, special paper coated with a high electrical resistance agent is used so that charges can be easily and stably retained on the paper. However, such special paper is difficult to write on with a pencil or pen (and also has problems with its shelf life as it deteriorates depending on environmental conditions such as humidity).
Not suitable for office paper.
又、針状電極先端と用紙表面との間隔が大きいと、放電
電界が広がって形成するドツトが大きくなり、高解像度
の記録画像を得ることが難しい。Furthermore, if the distance between the tip of the needle electrode and the paper surface is large, the discharge electric field will spread and the formed dots will become large, making it difficult to obtain a high-resolution recorded image.
その為、用紙表面にギャップ材を設け、そのギャップ材
と針状電極先端を摺接させることにより微小な間隙を確
保している。然るに、この方式による場合、針状電極先
端が摩耗するという問題がある。Therefore, a minute gap is secured by providing a gap material on the surface of the paper and bringing the tip of the needle electrode into sliding contact with the gap material. However, when using this method, there is a problem that the tip of the needle electrode is worn out.
そこで、普通紙を用いることができ、且つ、画像媒体と
記録電極先端との微小間隔を正確に確保する為、−旦、
ドラム吠の中間記録媒体上にトナー画像を形成し、その
トナー画像を用紙上に転写する方式が用いられている。Therefore, in order to be able to use plain paper and to ensure an accurate minute distance between the image medium and the tip of the recording electrode,
A method is used in which a toner image is formed on an intermediate recording medium such as a drum and the toner image is transferred onto paper.
この方式による場合、中間記録媒体を用いる為に装置が
大型化する傾向がある為、通常、記録と現像を同時に行
なうプロセスを採用し装置の大型化を回避することが多
い。In this method, the use of an intermediate recording medium tends to increase the size of the apparatus, so a process in which recording and development are performed at the same time is usually employed to avoid increasing the size of the apparatus.
この場合、記録電極を現像剤搬送路の幅方向（主走査方
向）に並列設置し、記録情報に応じ現像剤を選択的に記
録電極上から中間記録媒体に転移させてトナー画像を形
成する。In this case, recording electrodes are arranged in parallel in the width direction (main scanning direction) of the developer transport path, and a toner image is formed by selectively transferring developer from the recording electrodes to an intermediate recording medium according to recording information.
然るに、上記記録装置においては、画像形成を繰り返す
内に記録電極上にトナーが堆積する傾向がある。その結
果、堆積トナーを介し記録電極間の電圧リークが発生し
て画像コントラストや解像度を低下させたり、トナーの
堆積部分に画像欠陥を発生させることがある。However, in the recording apparatus described above, toner tends to accumulate on the recording electrode while image formation is repeated. As a result, voltage leakage may occur between the recording electrodes through the accumulated toner, resulting in a decrease in image contrast and resolution, and may cause image defects in areas where toner is accumulated.
本発明は、上記従来技術の問題点に鑑みなされたもので
あって、普通紙を使用でき、且つ、高解像度で鮮明な画
像を安定して得ることが可能な小型で耐久性に優れた静
電記録装置を提供することを目的とする。The present invention has been made in view of the problems of the prior art described above, and is a compact and highly durable static device that can use plain paper and stably obtain clear images with high resolution. The purpose is to provide an electronic recording device.
上記目的は、表面が現像剤搬送路となる現像剤担持部材
と、前記現像剤担持部材表面に沿って現像剤を搬送する
現像剤搬送手段と、前記現像剤担持部材表面に所定の間
隔で互いに電気的絶縁を保って並列設置した複数の記録
電極と、前記記録電極に所定の間隙を保って対向配置し
た円筒電極と、各前記記録電極に記録情報に応じた記録
電圧を印加する記録電極駆動手段と、前記円筒電極へバ
イアス電圧を印加するバイアス電源と、前記記録電圧と
前記バイアス電圧を制御する電圧制御手段とを有し、前
記電圧制御手段は前記記録電圧を印加する記録時間外に
前記記録電極側の現像剤を前記円筒電極に強制的に転移
させるクリーニング電圧を前記記録電極に印加すること
を特徴とする静電記録装置を提供することにより、達成
される。The above object is to provide a developer carrying member whose surface serves as a developer carrying path, a developer carrying means for carrying the developer along the surface of the developer carrying member, and a developer carrying member that is arranged on the surface of the developer carrying member at a predetermined interval from each other. A plurality of recording electrodes arranged in parallel while maintaining electrical insulation, a cylindrical electrode arranged opposite to the recording electrodes with a predetermined gap, and a recording electrode drive that applies a recording voltage according to recording information to each of the recording electrodes. means, a bias power source for applying a bias voltage to the cylindrical electrode, and voltage control means for controlling the recording voltage and the bias voltage, and the voltage control means is configured to apply the recording voltage to the cylindrical electrode outside the recording time. This is achieved by providing an electrostatic recording device characterized in that a cleaning voltage is applied to the recording electrode to forcibly transfer the developer on the recording electrode side to the cylindrical electrode.
以下、本発明の実施例について、第１図乃至第１１図に
基づき詳細に説明する。Embodiments of the present invention will be described in detail below with reference to FIGS. 1 to 11.
第１図は本発明の一実施例としての記録装置の全体構成
を示す模式的断面図である。同図において、１は普通紙
のカット用紙Ｐを積載収納した給紙カセットであり、機
体側方に挿脱自在に装着しである。挿着した給紙カセッ
トエの先端部上方には、給紙コロ１ａが矢印方向に駆動
回転可能に配設しである。給紙コロ１ａの前方には、絶
縁部材よりなる上、下搬送ガイド＆Ｆ２ａ、２ｂで画定
される用紙搬入経路を形成しである。この用紙搬入経路
中には、待機ロール対３を配設してあり、給紙コロ１ａ
により繰り出された用紙Ｐの進行を一旦停止させて搬送
姿勢を整えた後、下流側の画像転写部Ｔへ後述する記録
画像の到達タイミングと同期する様に再給送する。FIG. 1 is a schematic cross-sectional view showing the overall configuration of a recording apparatus as an embodiment of the present invention. In the figure, reference numeral 1 denotes a paper feed cassette loaded with cut sheets P of plain paper, which is detachably mounted on the side of the machine. A paper feed roller 1a is arranged above the tip of the inserted paper feed cassette so as to be rotatable in the direction of the arrow. In front of the paper feed roller 1a, a paper transport path is defined by upper and lower conveyance guides &F2a and 2b made of insulating members. A pair of standby rolls 3 is arranged in this paper transport path, and a paper feed roller 1a
After the advance of the paper P that has been fed out is temporarily stopped and the transport attitude is adjusted, the paper P is fed again to the image transfer section T on the downstream side in synchronization with the arrival timing of a recorded image, which will be described later.
待機ロール対３下流側の画像転写部Ｔには、転写帯電器
４を像担持体を兼ねる円筒電極５に対向配置しである。In the image transfer section T on the downstream side of the standby roll pair 3, a transfer charger 4 is arranged opposite to a cylindrical electrode 5 which also serves as an image carrier.
本例では、円筒電極５を矢印ａで示す反時計回り方向に
駆動回転させる。この円筒電極５には、後述する様に、
本例では負（−）の摩擦帯電極性を備えた現像剤を使用
するから、５０Ｖの記録時におけるバイアス電圧と＋２
００Ｖのクリーニング電圧を出力可能なバイアス電源５
ａを接続しである。このバイアス電源５ａは、記録装置
全体の記録動作を制御する記録制御部Ｃと信号接続して
あり、この記録制御部Ｃがら送られる電圧制御信号に応
じてその出力電圧を切り換える構成となっている。In this example, the cylindrical electrode 5 is driven to rotate in the counterclockwise direction indicated by arrow a. This cylindrical electrode 5 includes, as described later,
In this example, since a developer with negative (-) friction charge polarity is used, the bias voltage at the time of recording of 50V and +2
Bias power supply 5 capable of outputting 00V cleaning voltage
Connect a. This bias power supply 5a is signal-connected to a recording control section C that controls the recording operation of the entire recording apparatus, and is configured to switch its output voltage in accordance with a voltage control signal sent from this recording control section C. .
円筒電極５の反対側の周面には、後述する記録画像形成
ユニツ）Ｕを対向設置しである。この記録画像形成ユニ
ットＵにより円筒電極５表面にトナー記録画像が形成さ
れ、円筒電極５の回転と共にトナー記録画像が画像転写
部Ｔへ搬送され、再給送されてくる用紙上に転写される
。記録画像形成ユニットＵの構成については、抜栓詳細
に説明する。On the opposite circumferential surface of the cylindrical electrode 5, a recording image forming unit (U), which will be described later, is arranged to face the cylindrical electrode 5. A toner recorded image is formed on the surface of the cylindrical electrode 5 by this recorded image forming unit U, and as the cylindrical electrode 5 rotates, the toner recorded image is conveyed to the image transfer section T and transferred onto the paper that is being fed again. The configuration of the recording image forming unit U will be explained in detail including the plug removal.
画像転写部Ｔの下流側には、分離爪６を先端を円筒電極
周面に圧接させて配設しである。そして、分離爪６の下
流側には、エアーサクシＢン方式の搬送ベルト７が水平
方向に張設されており、記録画像の転写を終え分離爪６
により円筒電極５周面から分離された用紙の裏面を吸引
しつつその前方に設けられている定着器８に向けて搬送
する。定着器８は加熱ロール８ａと圧接ロール８ｂから
成り、両ロール間に用紙を挾持し搬送する際にトナー像
を熱定着する。定着を終えた用紙は、排出口９から画像
面を下にしたフェイスダウン状態で排紙トレイ１０上に
排出積載される。On the downstream side of the image transfer section T, a separating claw 6 is disposed with its tip pressed against the circumferential surface of the cylindrical electrode. An air sushi B type conveyor belt 7 is stretched horizontally downstream of the separation claw 6, and after transferring the recorded image, the separation claw 6
The back surface of the sheet separated from the circumferential surface of the cylindrical electrode 5 is sucked and conveyed toward the fixing device 8 provided in front of the sheet. The fixing device 8 consists of a heating roll 8a and a pressure roll 8b, and thermally fixes the toner image when the paper is held between the two rolls and conveyed. After the fixing, the sheets are discharged from the discharge port 9 and stacked on the paper discharge tray 10 in a face-down state with the image side facing down.
以上の如く、本例の記録装置においては、用紙の給紙か
ら排紙に至る全用紙搬送経路が略ストレート状に形成さ
れている為、通紙動作が全般的に滑らかであり、画像不
良やジャム等の通紙不良が発生し難い。又、記録装置に
とって好ましいページ揃えが不要なフェイスダウン排紙
状態を上述のストレート通紙経路で得ることができると
いう利点も備えている。As described above, in the recording apparatus of this example, the entire paper transport path from paper feeding to paper ejection is formed in a substantially straight shape, so the paper feeding operation is generally smooth, and image defects are avoided. Paper feeding defects such as jams are less likely to occur. It also has the advantage that the above-mentioned straight sheet passing path can achieve a face-down sheet discharge state that does not require page alignment, which is preferable for the recording apparatus.
ここで、記録画像形成ユニッ）Ｕの詳細な構成について
説明する。Here, the detailed configuration of the recording image forming unit (U) will be explained.
記録画像形成ユニットＵは、大略、現像剤を貯留するユ
ニット容器１１内の底部に攪拌ロール１２と供給ロール
１３を駆動回転可能に配設し、画像記録手段と現像剤搬
送手段を一体化した記録ユニッ） Ｕ ｗを、円筒電極
Ｓ周面に向けて開いた容器１１の開口１１ａにその記録
ヘッド部が位置する姿勢で配設して成る。本例では、現
像剤として、少なくとも絶縁性樹脂、磁性微粉末及び着
色剤粒子を含宵する一成分現像剤で、負（−）の摩擦帯
電特性を備えた絶縁性磁性トナーを使用する。尚、現像
剤としては、磁性体キャリヤと絶縁性トナーを所定の割
合で混合した二成分現像剤も使用できる。The recording image forming unit U is generally a recording unit in which an agitation roll 12 and a supply roll 13 are rotatably arranged at the bottom of a unit container 11 for storing developer, and an image recording means and a developer conveying means are integrated. A unit) Uw is disposed in such a manner that its recording head portion is located in the opening 11a of the container 11, which is open toward the circumferential surface of the cylindrical electrode S. In this example, an insulating magnetic toner is used as the developer, which is a one-component developer containing at least an insulating resin, magnetic fine powder, and colorant particles, and has negative (-) triboelectric charging characteristics. As the developer, a two-component developer in which a magnetic carrier and an insulating toner are mixed in a predetermined ratio can also be used.
第２図は、記録ユニツ） Ｕｗとその周辺部材を示す模
式的断面図である。本例の記録ユニットＵ、は、断面が
長円形で紙面垂直方向に延びる柱体をなしており、鉄、
ニッケル、パーマロイ等の高透磁率部材から成る基体１
４の外周面の一部を除いた領域に、非磁性材料がら成り
表面が磁性トナーｄの搬送路となる外被部材１５を被覆
してなる。基体１４の外被部材１５で覆った周表面には
、断面がＶ字形をなす多数の凹部溝１４ａを、基体長手
軸方向（紙面垂直方向）に沿って平行に等間隔て凹設形
成しである。尚、第２図では、計１２個の凹部溝１４ａ
だけを図示しであるが、実際はそれより多くの凹部溝１
４ａを密に形成しである。FIG. 2 is a schematic cross-sectional view showing the recording unit (Uw) and its peripheral members. The recording unit U of this example has an oval cross section and a columnar body extending in the direction perpendicular to the plane of the paper.
Base 1 made of a high magnetic permeability material such as nickel or permalloy
A region other than a part of the outer circumferential surface of 4 is covered with an outer cover member 15 made of a non-magnetic material and whose surface serves as a conveying path for the magnetic toner d. On the circumferential surface of the base body 14 covered with the outer covering member 15, a large number of concave grooves 14a having a V-shaped cross section are formed in parallel and at equal intervals along the longitudinal axis direction of the base body (direction perpendicular to the plane of the paper). It is. In addition, in FIG. 2, there are a total of 12 recessed grooves 14a.
Although only the recessed groove 1 is shown in the diagram, in reality there are more recessed grooves 1 than that.
4a are densely formed.
各回部溝１４ａの長さは、外被部材１５周表面上に画定
しである搬送経路の幅よりも長く設定しである。The length of each turning groove 14a is set to be longer than the width of the conveying path defined on the circumferential surface of the outer cover member 15.
各回部溝１４ａ内には、導線１６ａを埋め込み敷設し、
励磁コイルの一部としてのコイル部１６を夫々形成しで
ある。このフィル部１６を、第３図（ａ）に示す様に、
本例ではＡ、Ｂの２Ｍに分け、各組のフィル部１６Ａ、
１６Ｂを１個おきに配置しである。この場合、第３図（
ｂ）に示す様に、同じ組において他の組の１個のコイル
部１６をおいて隣合う一対のコイル部１８．１６（例え
ばコイル部１６Ｂ１をおいた連続する奇数番目と偶数番
目のコイル部１８Ａｌと１６Ａ２）は、同一導線ｌｅａ
を１個おきの１対の凹部＃１４ａ、１４ａに亘って所定
方向に多数回巻きつけて形成しである。従って、同じ組
において１個おきで隣合う一対のコイル［１６，１６の
導線ｌｅａの走行方向（コイルの巻線方向に基づく）は
、互いに逆方向となる。A conducting wire 16a is buried in each circuit groove 14a, and
A coil portion 16 as a part of the excitation coil is formed respectively. As shown in FIG. 3(a), this fill portion 16 is
In this example, it is divided into 2M parts A and B, and each set of fill parts 16A,
16B are arranged every other piece. In this case, Figure 3 (
As shown in b), a pair of coil portions 18.16 adjacent to each other with one coil portion 16 in the other group in the same group (for example, consecutive odd-numbered and even-numbered coil portions with the coil portion 16B1 18Al and 16A2) are the same conductor lea
It is formed by winding it many times in a predetermined direction across every other pair of recesses #14a, 14a. Therefore, the running directions (based on the winding direction of the coils) of the conducting wires lea of every other pair of adjacent coils [16, 16] in the same group are opposite to each other.
尚、コイル部１６を３組以上のｍ組に分ける場合は、各
組のコイル部は（ｍ−１）個おきの配置となり、導線ｌ
ｅａを（ｍ−１）個おきの一対の凹部溝１４ａ、１４ａ
に亘って巻回し、同じ組の一対のコイル部を形成する。In addition, when the coil part 16 is divided into m groups of 3 or more, the coil parts of each group are arranged every (m-1) pieces, and the conductor l
A pair of concave grooves 14a, 14a every (m-1) ea
to form a pair of coil parts of the same set.
上述の様に構成したＡ組のコイル部４ＡとＢ組のフィル
部４Ｂに対し、第４図に示す様にπ／２だけ位相をずら
せた２種類（２相）の交番電流ＡＩＩＢ
ｉ Ａ： 工ｓｉｎ （ωｔ） ・・・・・・・
・・・・・ （１）ｉ Ｂ： （ｓｉｎ （ωｔ＋π／
２）・・・・・・ （２）を、夫々通電する。As shown in FIG. 4, two types (two phases) of alternating currents AIIB i A with a phase shift of π/2 are applied to the coil section 4A of group A and the fill section 4B of group B configured as described above.工 sin (ωt) ・・・・・・・・・
... (1) i B: (sin (ωt+π/
2)...... (2) are energized, respectively.
各コイル部１６へ上述の様に交番電流を通電することに
より、基体１４における各凹部溝１４ａ間の各仕切り部
１４ｂには、第５図に示す様な通電電流に対応した磁界
が励磁される。第５図は、スリーブ２表面における励磁
磁界分布の時間的変化を示すグラフ図である。同グラフ
図では、縦軸が励磁磁界のスリーブ半径方向成分Ｈｒを
表し、横軸がスリーブ２表面上の位置を表している。尚
、Ｔは、通電する交番電流の周期である。本例では、前
述した様に各組における奇数番目と偶数番目の各コイル
部１６（例えば１６Ａ１とＩＥ３Ａ２）における導線の
走行方向が逆になっている。従って、同経のコイル部１
６に同位相の交番電流を流せば、奇数番目と偶数番目の
各フィル部１６により励磁される磁界の方向が互いに逆
方向となる。その結果、スリーブ２表面上に形成される
磁界の分布曲線も、第５図に示す様に交番電流に対応し
た波形を描いている。そして、この波形磁界は交番電流
と同様に周期Ｔで変化するから、結果的に図中凸方向に
進行する進行波磁界を形成することになる。By applying an alternating current to each coil portion 16 as described above, a magnetic field corresponding to the applied current as shown in FIG. 5 is excited in each partition portion 14b between each concave groove 14a in the base body 14. . FIG. 5 is a graph showing temporal changes in the excitation magnetic field distribution on the surface of the sleeve 2. FIG. In the graph, the vertical axis represents the sleeve radial component Hr of the excitation magnetic field, and the horizontal axis represents the position on the surface of the sleeve 2. Note that T is the period of the alternating current that is applied. In this example, as described above, the running directions of the conducting wires in the odd-numbered and even-numbered coil portions 16 (for example, 16A1 and IE3A2) in each set are reversed. Therefore, the same coil part 1
When alternating currents of the same phase are passed through the filters 6, the directions of the magnetic fields excited by the odd-numbered and even-numbered fill portions 16 become opposite to each other. As a result, the distribution curve of the magnetic field formed on the surface of the sleeve 2 also draws a waveform corresponding to the alternating current as shown in FIG. Since this waveform magnetic field changes with a period T like an alternating current, it results in the formation of a traveling wave magnetic field that travels in a convex direction in the figure.
即ち、第３図（ａ）において、全フィル部１６によりス
リーブ２表面に形成された波形磁界が、外被部材１５表
面に沿って反時計回り方向イヘ所定速度で進行すること
になる。その結果、進行波磁界の進行方向イとは逆の時
計回り方向口に磁性トナーを搬送することができる。こ
の場合、第２図に示す様に、磁性トナーｄは進行波磁界
の磁力線に対応したトナーの穂を形成しつつ搬送される
。That is, in FIG. 3(a), the wave-shaped magnetic field formed on the surface of the sleeve 2 by the entire fill portion 16 travels counterclockwise along the surface of the jacket member 15 at a predetermined speed. As a result, the magnetic toner can be conveyed to the port in the clockwise direction opposite to the traveling direction A of the traveling wave magnetic field. In this case, as shown in FIG. 2, the magnetic toner d is conveyed while forming toner spikes corresponding to the lines of magnetic force of the traveling wave magnetic field.
第２図に戻って、本例では、基体１４を２個に接離可能
に分割し、分割基体１４Ａ、１４Ｂを接合した状態で内
部空間Ｓが形成される構成となっている。各分割基体１
４Ａ、１４Ｂには、個々に外被部材１５Ａ、１５Ｂを被
設しである。そして、平坦なトナー搬送路を形成する為
、両外被部材１５人。Returning to FIG. 2, in this example, the base body 14 is separably divided into two parts, and the internal space S is formed by joining the divided base bodies 14A and 14B. Each divided base 1
4A and 14B are individually covered with outer cover members 15A and 15B. In order to form a flat toner conveyance path, 15 people worked on both outer covers.
１５Ｂの接合部にブリッジ部材１７を架設しである。A bridge member 17 is installed at the joint portion of 15B.
トナー搬送路の上流側には、トナーの穂を適正な長さに
規制してトナー層を形成するためのドクタブレード１８
を配設しである。本例のドクタブレード１８は、先端を
外被部材１５Ｂ表面に近接させた姿勢で、ユニット容器
１１の側壁に固着しである。ドクタブレード１８の下流
側で外被部材１５Ａの周表面が円筒電極５周表面に微小
間隙を保って最近接する位置が記録部Ｗとなり、ここで
磁性トナーｄを入力記録データに応じて円筒電極５表面
へ選択的に転移させ、トナー記録画像を形成する。記録
部Ｗより下流側には、掻取り板１９を、先端を外被部材
１５１表面に圧接させた姿勢で配設しである。この掻取
り板１９により、記録部Ｗで使用されずに搬送されてき
た残留磁性トナーｄ’を掻き落とす。On the upstream side of the toner conveyance path, there is a doctor blade 18 for regulating the toner spikes to an appropriate length to form a toner layer.
It is arranged. The doctor blade 18 of this example is fixed to the side wall of the unit container 11 with its tip brought close to the surface of the outer cover member 15B. The position where the circumferential surface of the jacket member 15A is closest to the circumferential surface of the cylindrical electrode 5 with a small gap on the downstream side of the doctor blade 18 is the recording section W, where the magnetic toner d is applied to the cylindrical electrode 5 according to input recording data. The toner is selectively transferred to the surface to form a toner recorded image. On the downstream side of the recording section W, a scraping plate 19 is disposed with its tip pressed against the surface of the jacket member 151. This scraping plate 19 scrapes off the residual magnetic toner d' that has been conveyed without being used in the recording section W.
外被部材１５Ａの表面上で、記録部Ｗからトナー搬送方
向口に対して上流側の領域には、記録電極シート２０を
被着敷設しである。本例の記録電極シート２０は、第６
図に示す様に、可視性印刷回路基板（ＦＰＣ）で構成し
てあり、シート長手方向に互いに平行に延びる複数の記
録電極線２０ａを、ベースフィルム２Ｏｂ上にシート幅
方向（トナー搬送路幅方向：主走査方向）へ所定の微細
ピッチで並列に延在形成しである。この記録電極線２０
ａの数は、主走査１ライン分の最大データ数に対応させ
である。本例では、多数の記録電極線２０ａを、４０μ
ｍの間隔を保って８６μｍピッチ（３００ＤＰＩ）の密
度で、エツチング加工によりパターン形成しである。On the surface of the outer covering member 15A, a recording electrode sheet 20 is adhered and laid in an area upstream from the recording section W with respect to the toner transport direction opening. The recording electrode sheet 20 of this example has the sixth
As shown in the figure, a plurality of recording electrode lines 20a, which are made of a visible printed circuit board (FPC) and extend parallel to each other in the sheet longitudinal direction, are placed on the base film 2Ob in the sheet width direction (toner transport path width direction). : are formed extending in parallel at a predetermined fine pitch in the main scanning direction). This recording electrode wire 20
The number a corresponds to the maximum number of data for one main scanning line. In this example, a large number of recording electrode lines 20a are
The pattern was formed by etching at a density of 86 μm pitch (300 DPI) with a spacing of m.
上述の様に構成した記録電極シート２０は、第６図に示
す様に、ブリッジ部材１７の下方に潜らせ、分割基体１
４Ａ、１４Ｂの接合面を通って内部空間Ｓまで敷設しで
ある。内部空間Ｓ内には、各記録電極線２０ａを駆動す
る複数個の駆動回路素子２１を配設しである。これら駆
動回路素子２１に、上述した記録電極シート２０の記録
電極線２０ａを適切な本数づつに分けて夫々接続しであ
る。The recording electrode sheet 20 configured as described above is submerged below the bridge member 17, as shown in FIG.
It passes through the joint surfaces of 4A and 14B and extends to the internal space S. Inside the internal space S, a plurality of drive circuit elements 21 are arranged to drive each recording electrode line 20a. The recording electrode wires 20a of the recording electrode sheet 20 described above are divided into appropriate numbers and connected to these drive circuit elements 21, respectively.
各駆動回路素子２１からは、入力配線回路２２を分割基
体１４Ａ、１４Ｂの他方の接合面から記録ユニッ）ＵＷ
外へ引き出しである。入力配線回路２２は、前述した記
録制御部Ｃに接続しである。従って、駆動回路素子２１
は、記録制御部Ｃから送られてくる記録データを含む各
種記録制御信号に応じて各記録電極線２０ａに記録制御
電圧を印加する。From each drive circuit element 21, the input wiring circuit 22 is connected to the recording unit (UW) from the other joint surface of the divided bases 14A, 14B.
There is a drawer outside. The input wiring circuit 22 is connected to the recording control section C mentioned above. Therefore, the drive circuit element 21
applies a recording control voltage to each recording electrode line 20a in response to various recording control signals including recording data sent from the recording control section C.
ここで、本例の記録装置における記録画像形成動作につ
いて説明する。Here, the recorded image forming operation in the recording apparatus of this example will be explained.
第２図において、励磁コイルに前述した様な交番電流を
通電すると、記録ユニツ）Ｕｗの励磁コイルを配設した
領域の外周面上には、矢印イ方向に移動する進行波磁界
が形成され、磁性トナーｄが穂を形成しつつその反対の
矢印口方向に搬送される。搬送される磁性トナーｄは、
ドクタブレード１８により所定の厚さに穂切り規制され
た後、記録部Ｗへ搬送される。この際に、磁性トナーｄ
は負極性に摩擦帯電される。In FIG. 2, when an alternating current as described above is applied to the excitation coil, a traveling wave magnetic field moving in the direction of arrow A is formed on the outer peripheral surface of the area where the excitation coil of the recording unit Uw is disposed. The magnetic toner d is conveyed in the opposite direction of the arrow while forming ears. The magnetic toner d being conveyed is
After the ears are cut to a predetermined thickness by the doctor blade 18, they are conveyed to the recording section W. At this time, magnetic toner d
is triboelectrically charged to negative polarity.
記録部Ｗでは、記録制御部Ｃにより、各記録電極線２０
ａと円筒電極５に対する各印加電圧が第７図に示す様に
制御され、記録電極線２Ｏａ上の磁性トナーｄを円筒電
極５周表面へ選択的に転移させる。In the recording section W, the recording control section C controls each recording electrode line 20.
The voltages applied to a and the cylindrical electrode 5 are controlled as shown in FIG. 7, and the magnetic toner d on the recording electrode line 2Oa is selectively transferred to the circumferential surface of the cylindrical electrode 5.
記録電極線２０ａに対しては、駆動回路素子２１が、入
力される記録データに応じて本例では一２００Ｖ （オ
ン電圧）とＯＶ（オフ電圧）の間で変化する記録電圧Ｖ
ｌを、所定の記録時間ｔ１に亘って印加する。この場合
、記録時間ｔｌは１枚のカット用紙Ｐ分の記録画像を形
成するのに要する時間で、この記録時間ｔｌと次順の記
録時間ｔ１との間には、本例ではＯｖの電圧（オフ電圧
）を印加する非記録時間ｔ２を確保しである。この非記
録時間ｔ２は、カット用紙Ｐを連続的に搬送する際の間
隔時間となる。従って、上記記録時間ｔ１と非記録時間
ｔ２を加えた時間が、１枚のカット用紙Ｐに対する画像
形成周期ｔ３となる。For the recording electrode line 20a, the drive circuit element 21 applies a recording voltage V that changes between -200V (on voltage) and OV (off voltage) in this example according to input recording data.
l is applied over a predetermined recording time t1. In this case, the recording time tl is the time required to form a recorded image for one sheet of cut paper P, and between this recording time tl and the next recording time t1, in this example, a voltage of Ov ( This is to ensure a non-recording time t2 during which an off-voltage is applied. This non-recording time t2 is an interval time when the cut paper P is continuously conveyed. Therefore, the sum of the recording time t1 and the non-recording time t2 becomes the image forming cycle t3 for one sheet of cut paper P.
一方、円筒電極５に対しては、バイアス電源５ａが、上
述した各非記録時間ｔ２中に、後述する様に記録電極線
２０ａをクリーニングする為のクリーニング電圧Ｖ３（
本例では＋２００Ｖ）を、時間ｔ４に亘って間欠的に印
加する。このりＩＪ−ニング時間ｔ４は、非記録時間ｔ
２より短く設定する。クリーニング時間ｔ４以外の時間
は、本例では一５０Ｖのバイアス電圧Ｖ２を印加する。On the other hand, for the cylindrical electrode 5, the bias power supply 5a applies a cleaning voltage V3 (
In this example, +200V) is applied intermittently over time t4. This IJ-ning time t4 is the non-recording time t
Set shorter than 2. In this example, a bias voltage V2 of -50V is applied during times other than the cleaning time t4.
記録時間ｔ１においては、駆動回路素子２１に入力され
る１ビツトの記録データが“Ｈ”のときに、対応する記
録電極線２０ａへ一２００Ｖのオン電圧が印加される。At recording time t1, when one bit of recording data input to the drive circuit element 21 is "H", an on-voltage of -200V is applied to the corresponding recording electrode line 20a.
これにより、円筒電極５には一５０Ｖのバイアス電圧Ｖ
２が印加されているから、円筒電極５から記録電極線２
０ａに向けて１５０Ｖの電位差が形成される。負極性に
帯電した磁性トナーｄは電位の高い方へ移動するから、
間隔が最も狭く電界が最大となる記録部Ｗにおいて、−
２００Ｖの電圧が印加されている記録電極線２Ｏａ上の
磁性トナーｄだけが選択的に円筒電極５表面に転移し、
黒ドツトを形成する。This causes the cylindrical electrode 5 to have a bias voltage of -50V.
2 is applied, the recording electrode line 2 is connected from the cylindrical electrode 5.
A potential difference of 150V is formed toward 0a. Because the negatively charged magnetic toner d moves toward the higher potential,
In the recording section W where the interval is the narrowest and the electric field is maximum, -
Only the magnetic toner d on the recording electrode line 2Oa to which a voltage of 200V is applied is selectively transferred to the surface of the cylindrical electrode 5,
Form a black dot.
一方、１ビツトの記録データが“Ｌ′”の場合、記録電
極線２０ａに本例ではＯＶのオフ電圧が印加される。そ
の結果、円筒電極５からその対応記録電極線２０ａに見
た電位差は一５０Ｖとなり、負極性の磁性トナーｄは記
録電極線２Ｏａ側に保持されたままで転移しない。On the other hand, when one bit of recording data is "L'", an off voltage of OV in this example is applied to the recording electrode line 20a. As a result, the potential difference seen from the cylindrical electrode 5 to its corresponding recording electrode line 20a is -50V, and the negative magnetic toner d remains held on the recording electrode line 2Oa side and does not transfer.
上述の様に、記録時間ｔｌにおいては、入力記録データ
に応じて記録電極線２０ａの電位が一２００ＶとＯｖに
選択的に制御され、円筒電極５周表面の対向部に記録デ
ータに応じたトナー記録画像が形成される。このトナー
記録画像の濃度は、バイアス電源５ａのバイアス電圧ｖ
２を変化させることにより調節できる。その場合、適切
な調節範囲はＯ〜−５０Ｖ程度であり、ＯＶに近い程、
画像濃度が高くなる。As described above, during the recording time tl, the potential of the recording electrode line 20a is selectively controlled to 1200 V and Ov according to the input recording data, and toner corresponding to the recording data is applied to the opposing portion of the circumferential surface of the cylindrical electrode 5. A recorded image is formed. The density of this toner recorded image is determined by the bias voltage v of the bias power supply 5a.
It can be adjusted by changing 2. In that case, the appropriate adjustment range is about 0 to -50V, and the closer it is to OV, the more
Image density increases.
而して、非記録時間ｔ２の内のクリーニング時間ｔ４に
おいては、円筒電極５に＋２００ｖのクリーニング電圧
が印加され、全ての記録電極線２０ａにＯＶのオフ電圧
が印加されている。これにより、円筒電極５から記録電
極線２０ａに見て＋２００Ｖの電位差が形成され、全記
録電極線２０ａ上の磁性トナーｄが円筒電極５周表面に
転移する。この場合の電位差は、前述した記録時間ｔ１
でのオン記録電圧印加時に形成される電位差＋１５０Ｖ
より＋５０Ｖだけ大きい。従って、オン記録電圧印加時
に転移せずに記録電極線２Ｏａ上に残留する磁性トナー
も、強制的に円筒電極５周表面に転移させることができ
る。これにより、記録電極線２Ｏａ上への磁性トナーの
堆積を防止するこきができる。その結果、堆積磁性トナ
ーを介した記録電極線２Ｏａ間の電圧リークによる画像
コントラストの低下や画像欠陥の発生を確実に防止する
ことができる。During the cleaning time t4 of the non-recording time t2, a +200V cleaning voltage is applied to the cylindrical electrode 5, and an OV off-voltage is applied to all the recording electrode lines 20a. As a result, a potential difference of +200 V is created from the cylindrical electrode 5 to the recording electrode line 20a, and the magnetic toner d on all the recording electrode lines 20a is transferred to the circumferential surface of the cylindrical electrode 5. The potential difference in this case is the recording time t1 mentioned above.
Potential difference +150V formed when applying on-record voltage at
+50V larger than that. Therefore, the magnetic toner that remains on the recording electrode line 2Oa without being transferred when the ON recording voltage is applied can also be forcibly transferred to the circumferential surface of the cylindrical electrode 5. This makes it possible to prevent magnetic toner from being deposited on the recording electrode line 2Oa. As a result, it is possible to reliably prevent a decrease in image contrast and the occurrence of image defects due to voltage leakage between the recording electrode lines 2Oa via the deposited magnetic toner.
非記録時間ｔ２の内のクリーニング時間ｔ４以外のとき
は、円筒電極５に一５０Ｖのバイアス電圧Ｖ２、記録電
極線２０ａにはＯｖのオフ電圧、が夫々印加されており
、記録時間ｔｌ中のデータ“Ｌ”時と同様に磁性トナー
ｄを記録電極線２Ｏａ上に保持し転移させない。At times other than the cleaning time t4 within the non-recording time t2, a bias voltage V2 of -50V is applied to the cylindrical electrode 5, and an off-voltage of Ov is applied to the recording electrode line 20a, and the data during the recording time tl is applied. As in the case of "L", the magnetic toner d is held on the recording electrode line 2Oa and is not transferred.
記録部Ｗで円筒電極Ｓ側へ転移せずに残留する磁性トナ
ーｄ′は、進行波磁界の進行と共に下流側へ移動して掻
取り板１９により外被部材１５Ａ表面から掻き落とされ
、貯留磁性トナーと攪拌混合される。The magnetic toner d' remaining in the recording section W without being transferred to the cylindrical electrode S side moves downstream with the progress of the traveling wave magnetic field and is scraped off from the surface of the jacket member 15A by the scraping plate 19, and the stored magnetic toner is Stirred and mixed with toner.
円筒電極５周表面に形成されたトナー記録画像は、第１
図に示す様に円筒ｉｉ５の反時計回り方向ａの回転と共
に画像転写部Ｔへ搬送され、ここで待機ロール対３によ
りタイミングを測って再給送されてくる用紙上に転写さ
れる。又、クリーニング時間ｔ４に強制転移させたクリ
ーニングトナーが画像転写部Ｔを移動する際は、カット
用紙Ｐの用紙間に対応する為、そのクリーニングトナー
がカット用紙Ｐ上に転写されて画像を汚す不都合は発生
しない。The toner recorded image formed on the circumferential surface of the cylindrical electrode 5 is
As shown in the figure, as the cylinder ii5 rotates in the counterclockwise direction a, the image is conveyed to the image transfer section T, where it is transferred onto a sheet of paper that is re-fed by a pair of standby rolls 3 at a certain timing. Furthermore, when the cleaning toner forcibly transferred during the cleaning time t4 moves through the image transfer section T, the cleaning toner is transferred onto the cut paper P and stains the image, since it corresponds between the sheets of the cut paper P. does not occur.
転写されずに円筒電極５周表面に残留する未転写トナー
（クリーニングトナーも含む〕は、円筒電極５の回転と
共に再度記録部Ｗに返送されてくる。記録ＮＷの上流側
には、磁性トナーが円筒電極５と記録電極線２Ｏａ間に
おいて浮動した状態で滞留するトナー溜りＲｔが形成さ
れている。このトナー溜りＲｔは、記録電極線２０ａに
オン−オフ各電圧が印加されることにより、記録部Ｗの
上流側にもそれに対応して双方向の電界が形成され、磁
性トナーｄが両電極間で往復移動する様な状態となった
ものである。円筒電極５周表面は、そのトナー溜りＲｔ
のトナー掻取り効果によりクリーニングされた後、記録
部Ｗに至る。記録部Ｗでは、クリーニングされた円筒電
極５周表面とクリーニング時間ｔ４でクリーニングされ
ている記録電極線２０ａにより、鮮明なトナー記録画像
を繰り返し形成することができる。Untransferred toner (including cleaning toner) remaining on the circumferential surface of the cylindrical electrode 5 without being transferred is returned to the recording section W again as the cylindrical electrode 5 rotates.On the upstream side of the recording NW, magnetic toner is A toner pool Rt that stays in a floating state is formed between the cylindrical electrode 5 and the recording electrode line 20a.This toner pool Rt is generated by applying on/off voltages to the recording electrode line 20a, so that the toner pool Rt Correspondingly, a bidirectional electric field is formed on the upstream side of W, and the magnetic toner d moves back and forth between both electrodes.The circumferential surface of the cylindrical electrode 5 has a toner pool Rt
After being cleaned by the toner scraping effect, the toner reaches the recording section W. In the recording section W, clear toner recorded images can be repeatedly formed by the cleaned peripheral surface of the cylindrical electrode 5 and the recording electrode wire 20a that has been cleaned during the cleaning time t4.
尚、クリーニング時間ｔ４中は、コイル部１６による磁
性トナーｄの搬送動作を中断してもよい。Note that during the cleaning time t4, the operation of conveying the magnetic toner d by the coil section 16 may be interrupted.
これにより、クリーニング時間ｔ４において円筒電極５
周表面に強制転移させるトナー量を軽減し、磁性トナー
ｄの消費を節約することができる。As a result, during the cleaning time t4, the cylindrical electrode 5
The amount of toner forcibly transferred to the peripheral surface can be reduced, and the consumption of magnetic toner d can be saved.
次に、本発明の他の実施例について説明する。Next, other embodiments of the present invention will be described.
尚、上記実施例と同一の構成要素については、同一の符
号を付してその説明を省略する。Note that the same components as those in the above embodiment are given the same reference numerals, and the explanation thereof will be omitted.
第８図に示す実施例は、画像形成ニー”−／ ）Ｕの記
録ユニツ） Ｕ ｗにおける現像剤搬送手段として一対
のマグネットロール２３，２４を使用するものである。The embodiment shown in FIG. 8 uses a pair of magnet rolls 23 and 24 as a developer conveying means in the recording unit (U) of the image forming knee (U).
第９図はその記録ユニッｈＵｗと円筒電極５からなる画
像形成プロセス部を詳細に示す模式的断面図である。第
９図に示す様に、本例の記録ユニツ）Ｕｌｌは、マグネ
ットロール２３，２４を夫々内包した一対の磁気搬送ロ
ール２５，２６間に非磁性材からなる現像剤担持部材２
７を架設し、記録手段としての記録電極体２８を再磁気
搬送ロール２５，２６間に配設して構成しである。FIG. 9 is a schematic sectional view showing in detail the image forming process section consisting of the recording unit hUw and the cylindrical electrode 5. As shown in FIG. 9, the recording unit (Ull) of this example has a developer carrying member 2 made of a non-magnetic material between a pair of magnetic conveyance rolls 25 and 26 containing magnet rolls 23 and 24, respectively.
7, and a recording electrode body 28 serving as a recording means is arranged between remagnetic transport rolls 25 and 26.
両マグネットロール２３．２４を夫々矢印すで示す同一
方向へ同速度で回転させれば、現像剤担持部材２７表面
上には、両マグネットロール２３゜２４の各磁力の合力
による合成回転磁場が形成される。この合成回転磁場に
より、磁性トナーｄを現像剤担持部材２７表面に沿って
矢印Ｃ方向に搬送する。When both magnet rolls 23 and 24 are rotated at the same speed in the same direction indicated by the arrows, a composite rotating magnetic field is formed on the surface of the developer carrying member 27 by the resultant force of the magnetic forces of both magnet rolls 23 and 24. be done. This combined rotating magnetic field transports the magnetic toner d along the surface of the developer carrying member 27 in the direction of arrow C.
現像剤担持部材２７表面に沿った現像剤搬送路中で、円
筒電極５周面に最近接する記録部Ｗには、記録電極体２
８の先端面を突出させである。記録電極体２８は、第１
０図に示す様に、板状の電極支持部材２８ａ表面に上記
実施例の記録電極シート２０と同一構成のものを被着し
てなる。記録電極ンー）２０には、駆動回路素子２９を
直接搭載しである。In the developer transport path along the surface of the developer carrying member 27, the recording portion W closest to the circumferential surface of the cylindrical electrode 5 has the recording electrode body 2
The tip surface of No. 8 is made to protrude. The recording electrode body 28
As shown in FIG. 0, a sheet having the same structure as the recording electrode sheet 20 of the above embodiment is adhered to the surface of a plate-shaped electrode support member 28a. A drive circuit element 29 is directly mounted on the recording electrode (20).
而して、本例においても、円筒電極５にバイアス電圧を
印加するバイアス電源５ａと、記録電極線２０ａを駆動
する駆動回路素子２９を、記録制御部Ｃに接続しである
。駆動制御部Ｃは、円筒電極５に対するバイアス電源５
ａによる印加電圧と、記録電極線２０ａに対する駆動回
路素子２９による印加電圧を、第７図のタイミングチャ
ート図に示す様に制御する。これにより、上記実施例と
同様に、記録電極線２Ｏａ上に付着する磁性トナーをク
リーニング除去してその堆積を確実に防止でき、鮮明で
画像欠陥のない良好な記録画像を安定して形成すること
ができる。In this example as well, the bias power supply 5a that applies a bias voltage to the cylindrical electrode 5 and the drive circuit element 29 that drives the recording electrode line 20a are connected to the recording control section C. The drive control unit C has a bias power supply 5 for the cylindrical electrode 5.
The voltage applied by a and the voltage applied by the drive circuit element 29 to the recording electrode line 20a are controlled as shown in the timing chart of FIG. As a result, as in the above embodiment, the magnetic toner adhering to the recording electrode line 2Oa can be removed by cleaning and its accumulation can be reliably prevented, and a good recorded image that is clear and free from image defects can be stably formed. I can do it.
又、記録手段としての記録電極体２８を記録ユニットＵ
ｗ内に内蔵したから、記録電極を高密度に実装した記録
ユニッ）ＵＷを小型でコンパクトに構成できる。従って
、円筒電極５周辺と記録ユニットＵｗから成る画像形成
プロセス部の小型化が促進され、中間記録媒体（円筒電
極５）を用いた非接触式静電記録装置の小型化を大幅に
促進することが可能となる。Further, the recording electrode body 28 as a recording means is connected to a recording unit U.
Because it is built into the UW, the recording unit (UW) in which recording electrodes are densely mounted can be made small and compact. Therefore, the size of the image forming process section consisting of the periphery of the cylindrical electrode 5 and the recording unit Uw is promoted, and the size of the non-contact electrostatic recording device using the intermediate recording medium (cylindrical electrode 5) is greatly promoted. becomes possible.
尚、本発明は、上記の特定の実施例に限定されるべきも
のでなく、本発明の技術的節回において種々の変形が可
能であることは勿論である。It should be noted that the present invention is not limited to the specific embodiments described above, and it goes without saying that various modifications can be made within the technical scope of the present invention.
例えば、第１１図に示す様に、クリーニング電圧として
、電位が上記実施例におけるクリー二／グ電圧Ｖ３とバ
イアス電圧Ｖ２の間でパルス状に変化する電圧を印加し
てもよい。この場合の周波数は、商用周波数以上とする
。本例による場合、記録電極に付着する現像剤に振動を
与える様な効果が加わり、記録電極のクリーニング効果
がより向上する。For example, as shown in FIG. 11, a voltage whose potential changes in a pulsed manner between the cleaning voltage V3 in the above embodiment and the bias voltage V2 may be applied as the cleaning voltage. In this case, the frequency shall be higher than the commercial frequency. According to this example, an effect of giving vibration to the developer adhering to the recording electrode is added, and the cleaning effect of the recording electrode is further improved.
又、上記実施例等の様に線状の記録電極を用いる場合に
限らず、所謂マルチスタイラスプリ／夕の針状電極等の
様に記録電極を点状に並設した場合にも、本発明を適用
することができる。Furthermore, the present invention is applicable not only to the case where linear recording electrodes are used as in the above-mentioned embodiments, but also when the recording electrodes are arranged in a dotted manner, such as in a so-called multi-stylus sprite/evening needle electrode. can be applied.
更に、本発明は、現像剤として磁性現像剤ではなく非磁
性現像剤を使用する場合にも適用可能である。Furthermore, the present invention is also applicable to the case where a non-magnetic developer is used instead of a magnetic developer.
以上、詳細に説明した様に、本発明によれば、現像剤担
持部材上に並設した記録電極と中間記録媒体を兼ねる円
筒電極を微小間隙で対向させ、記録画像を形成しない非
記録時間に記録電極上の現像剤を円筒電極に強制的に転
移させるクリーニング電圧を電極対向部に印加すること
により、記録電極上に現像剤が堆積する不都合を防止す
ることができる。その結果、堆積現像剤に起因する記録
電極間の電圧リークや画像欠陥の発生を確実に防止し、
普通紙上にフントラスト及び解像度が共に高く鮮明な記
録画像を安定的に形成することが可能となる。As described in detail above, according to the present invention, the recording electrodes arranged in parallel on the developer carrying member and the cylindrical electrode that also serves as an intermediate recording medium are opposed to each other with a minute gap, and during the non-recording time when no recorded image is formed, By applying a cleaning voltage to the electrode facing portion to forcibly transfer the developer on the recording electrode to the cylindrical electrode, it is possible to prevent the inconvenience of the developer accumulating on the recording electrode. As a result, voltage leaks between recording electrodes and image defects caused by accumulated developer can be reliably prevented.
It becomes possible to stably form a clear recorded image with high image retention and resolution on plain paper.
又、記録電極の駆動回路を現像剤搬送手段内に設置すれ
ば、多数の記録電極とその駆動回路を高密度実装した記
録手段と現像剤搬送手段とをコンパクトに一体化でき、
且つ、記録と現像を同時に行なうから、大型化する傾向
のある中間記録媒体を用いた静電記録装置の小型化を図
ることができる。従って、上述した良好な記録画像を普
通紙上に安定的に形成可能な非接触式の静電記録装置を
小型で安価に製造することが可能となる。Furthermore, by installing the recording electrode drive circuit within the developer conveyance means, it is possible to compactly integrate the recording means in which a large number of recording electrodes and their drive circuits are densely packaged, and the developer conveyance means.
Furthermore, since recording and development are performed simultaneously, it is possible to downsize an electrostatic recording apparatus using an intermediate recording medium, which tends to be large. Therefore, it is possible to manufacture a non-contact type electrostatic recording device that is small and inexpensive and can stably form the above-mentioned good recorded images on plain paper.
第１図は本発明の一実施例としての記録装置の全体構成
を示す模式的断面図、第２図は上記記録装置における記
録画像形成ユニットとその周辺構成を示す断面図、第３
図（ａ）及び第３図（ｂ）は夫々上記記録装置における
励磁コイルの構成を示す各説明図、第４図は上記励磁フ
ィルに通電する電流の波形を示すグラフ図、第５図は上
記励磁フィルによる励磁磁界分布曲線の時間的変化を示
すグラフ図、第６図は上記記録画像形成ユニットにおけ
る記録ユニットを示す一部破断斜視図、第７図は上記記
録装置における電圧制御動作を示すタイミングチャート
図、第８図は本発明の他の実施例を示す模式的断面図、
第９図は上記他の実施例における画像形成プロセス部を
示す模式的断面図、第１０図は上記画像形成プロセス部
の記録電極体を示す斜視図、第１１図は本発明の記録電
圧制御動作の変形例を示すタイミングチャート図である
。
１・・・給紙力セント
３・・・待機ロール対
４・・・転写帯電器
５・・・円筒電極
５ａ・・・バイアス電源（円筒電極側）８・・・定着器
１１・・・ユニット容器
１２・・・撹拌ロール
１４・・・基体
１４Ａ、１４Ｂ・・・分割基体
１５．１５Ａ、１５Ｂ・・・外被部材
工６・・・コイル部
１８・・・ドクタブレード
１９・・・掻き取り板
２０・・・記録電極シート
２０ａ・・・記録電極線
２０ｂ・・・ベースフィルム
２１．２９・・・駆動回路素子
２２・・・入力配線回路
２３．２４・・・マグネットロール
２７・・・現像剤担持部材
２８・・・記録電極体
Ｃ・・・記録制御部
Ｔ・・・画像転写部
Ｕ・・・記録画像形成ユニ・ｙ）
Ｕ、・・・記録ユニット
Ｗ・・・記録部FIG. 1 is a schematic cross-sectional view showing the overall configuration of a recording apparatus as an embodiment of the present invention, FIG. 2 is a cross-sectional view showing a recorded image forming unit and its peripheral configuration in the recording apparatus, and FIG.
Figures (a) and 3(b) are explanatory diagrams showing the configuration of the excitation coil in the recording device, Figure 4 is a graph diagram showing the waveform of the current flowing through the excitation filter, and Figure 5 is the A graph showing temporal changes in the excitation magnetic field distribution curve due to the excitation filter, FIG. 6 is a partially cutaway perspective view showing the recording unit in the recording image forming unit, and FIG. 7 is a timing diagram showing the voltage control operation in the recording apparatus. A chart diagram, FIG. 8 is a schematic sectional view showing another embodiment of the present invention,
FIG. 9 is a schematic sectional view showing an image forming process section in the other embodiment, FIG. 10 is a perspective view showing a recording electrode body of the image forming process section, and FIG. 11 is a recording voltage control operation of the present invention. FIG. 4 is a timing chart diagram showing a modification example of FIG. 1... Paper feeding power cent. 3... Standby roll pair 4... Transfer charger 5... Cylindrical electrode 5a... Bias power supply (cylindrical electrode side) 8... Fixing device 11... Unit Container 12...Stirring roll 14...Base 14A, 14B...Divided base 15.15A, 15B...Sheath member processing 6...Coil portion 18...Doctor blade 19...Scraping Plate 20...Recording electrode sheet 20a...Recording electrode wire 20b...Base film 21.29...Drive circuit element 22...Input wiring circuit 23.24...Magnet roll 27...Development Agent carrying member 28...Recording electrode body C...Recording control section T...Image transfer section U...Recording image forming unit y) U,...Recording unit W...Recording section
Claims (2)
記現像剤担持部材表面に沿って現像剤を搬送する現像剤
搬送手段と、前記現像剤担持部材表面に所定の間隔で互
いに電気的絶縁を保って並列設置した複数の記録電極と
、前記記録電極に所定の間隙を保って対向配置した円筒
電極と、各前記記録電極に記録情報に応じた記録電圧を
印加する記録電極駆動手段と、前記円筒電極へバイアス
電圧を印加するバイアス電源と、前記記録電圧と前記バ
イアス電圧を制御する電圧制御手段とを有し、前記電圧
制御手段は前記記録電圧を印加する記録時間外に前記記
録電極側の現像剤を前記円筒電極に強制的に転移させる
クリーニング電圧を前記記録電極に印加することを特徴
とする静電記録装置。(1) A developer carrying member whose surface serves as a developer carrying path, a developer carrying means for carrying the developer along the surface of the developer carrying member, and an electrical connection between the developer carrying member surface at a predetermined interval. a plurality of recording electrodes arranged in parallel while maintaining physical insulation; a cylindrical electrode disposed facing the recording electrodes with a predetermined gap therebetween; and a recording electrode driving means for applying a recording voltage to each recording electrode according to recording information. a bias power supply that applies a bias voltage to the cylindrical electrode; and a voltage control means that controls the recording voltage and the bias voltage; An electrostatic recording device characterized in that a cleaning voltage is applied to the recording electrode to forcibly transfer the developer on the electrode side to the cylindrical electrode.
せた電圧である請求項１記載の静電記録装置。(2) The electrostatic recording device according to claim 1, wherein the cleaning voltage is a voltage whose potential is changed in a pulsed manner.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15934990A JPH0451055A (en) | 1990-06-18 | 1990-06-18 | Electrostatic recordor |
| US07/710,684 US5210551A (en) | 1990-06-18 | 1991-06-05 | Electrostatic recording apparatus with an electrode drive means within the developer circulating path |
| EP91109301A EP0462457B1 (en) | 1990-06-18 | 1991-06-06 | Electrostatic recording apparatus |
| DE69106940T DE69106940T2 (en) | 1990-06-18 | 1991-06-06 | Electrostatic recorder. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15934990A JPH0451055A (en) | 1990-06-18 | 1990-06-18 | Electrostatic recordor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0451055A true JPH0451055A (en) | 1992-02-19 |
Family
ID=15691906
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15934990A Pending JPH0451055A (en) | 1990-06-18 | 1990-06-18 | Electrostatic recordor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0451055A (en) |
-
1990
- 1990-06-18 JP JP15934990A patent/JPH0451055A/en active Pending
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