JPS6141755B2 - - Google Patents
Info
- Publication number
- JPS6141755B2 JPS6141755B2 JP51005720A JP572076A JPS6141755B2 JP S6141755 B2 JPS6141755 B2 JP S6141755B2 JP 51005720 A JP51005720 A JP 51005720A JP 572076 A JP572076 A JP 572076A JP S6141755 B2 JPS6141755 B2 JP S6141755B2
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- recording
- bias
- counter electrode
- voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000002245 particle Substances 0.000 claims description 31
- 239000000463 material Substances 0.000 claims description 28
- 230000005684 electric field Effects 0.000 claims description 14
- 238000011144 upstream manufacturing Methods 0.000 claims 1
- 239000003990 capacitor Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 230000004304 visual acuity Effects 0.000 description 1
Landscapes
- Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
- Electrophotography Using Other Than Carlson'S Method (AREA)
- Fax Reproducing Arrangements (AREA)
Description
【発明の詳細な説明】
本発明は記録材に記録信号に対応した可視像を
形成するためのフアクシミリ装置等に用いる静電
記録装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electrostatic recording device used in a facsimile device or the like for forming a visible image corresponding to a recording signal on a recording material.
従来から、表面が荷電着色粒子を含有する現像
液膜で覆われている対向電極と記録電極との間に
記録信号に応じて電圧を印加してそれらの間に配
置された記録材（普通紙等）を横切つて電界を形
成し、この電界の作用により荷電着色粒子を記録
材に付着させる静電記録装置が開発されている。
しかし、この静電記録装置は、対向電極の表面の
現像液膜には荷電着色粒子が分散しており、か
つ、記録材が直接に現像液膜に接触するから、記
録信号に応じて電圧が印加されない記録材の部分
にも荷電着色粒子が付着するため、記録材の地汚
れが発生し、コントラストの低い画像しか得るこ
とができず、解像力があまり良くないという欠点
があつた。 Conventionally, a recording material (plain paper An electrostatic recording device has been developed in which an electric field is formed across the recording material, and charged colored particles are attached to the recording material by the action of this electric field.
However, in this electrostatic recording device, charged colored particles are dispersed in the developer film on the surface of the counter electrode, and the recording material is in direct contact with the developer film, so the voltage is applied depending on the recording signal. Charged colored particles also adhere to areas of the recording material where no voltage is applied, causing background smudges on the recording material, making it possible to obtain only images with low contrast, and resulting in poor resolution.
また、表面が乾式の荷電着色粒子で覆われてい
る対向電極と記録電極との間に記録信号に応じて
電圧を印加してそれらの間に配置された記録材を
横切つて電界を形成し、この電界の作用により記
録材に乾式の荷電着色粒子を付着させる静電記録
装置も開発されている。しかし、この静電記録装
置は、記録電極と対向電極との間は空気であるか
ら空気中に浮遊している荷電着色粒子が広範囲に
わたつて記録電極の方向へ引きつけられることと
なり、記録材の地汚れが発生しコントラストの低
い画像しか得られず、解像力が良くないという欠
点があつた。 In addition, a voltage is applied in accordance with the recording signal between a counter electrode whose surface is covered with dry charged colored particles and a recording electrode to form an electric field across the recording material placed between them. An electrostatic recording device has also been developed in which dry charged colored particles are attached to a recording material by the action of this electric field. However, in this electrostatic recording device, since there is air between the recording electrode and the counter electrode, charged colored particles floating in the air are attracted over a wide range toward the recording electrode, and the recording material The drawbacks were that background smudges occurred, images with low contrast were obtained, and resolution was poor.
本発明の目的は、上述の欠点を解消することが
できる静電記録装置を提供することにある。 An object of the present invention is to provide an electrostatic recording device that can eliminate the above-mentioned drawbacks.
以下に図面を参照しながら本発明を説明する。 The present invention will be described below with reference to the drawings.
第１図において符号１はローラ状の対向電極を
示している。この対向電極１は図示してない駆動
機構により矢印方向へ回転される。上記対向電極
の下部近傍には現像液供給装置２が配設されてい
る。この現像液供給装置２は、タンク２ａ内の荷
電着色粒子を含有した現像液２ｂに一部を浸漬す
ると共に対向電極１に接触し、かつ、図示してい
ない駆動機構により回転される液供給ローラ２ｃ
が現像液２ｂを汲み上げて対向電極１の表面に供
給するものである。現像液を供給された対向電極
１はその表面が現像液膜で覆われることとなる。
対向電極１の上部にはこれと一定間隔を隔てて記
録電極３が配設されている。この記録電極３の外
周には絶縁層３ａが形成されている。上記記録電
極３と対向電極１との間には記録信号用電源４に
より記録信号に応じて電圧が印加される。記録電
極３と対向電極１との間には記録材５が配置され
るようになつており、該記録材５は搬送装置６に
より搬送される。この搬送装置６は図示してない
駆動機構により矢印方向へ回転されるローラ６ａ
および案内板６ｂとからなる。対向電極１の下部
に接触しこれと逆方向に回転されるクリーニング
ローラ７が配設されている。上記記録材５の上方
位置であつて記録電極３の近傍には、荷電着色粒
子を対向電極１に移動させる電界を形成するため
のバイアス電極８が配設されており、このバイア
ス電極８はその電位を所定の値にするためのバイ
アス電圧用電源９に接続されている。また、記録
材５の下方位置に記録電極３と対向電極１との間
に入る前の荷電着色粒子を対向電極１の表面に移
動させる電界を形成するバイアス電極１０が配設
されており、このバイアス電極１０も、その電位
を所定の値にするためのバイアス電圧電源１１に
接続されている。 In FIG. 1, reference numeral 1 indicates a roller-shaped counter electrode. This counter electrode 1 is rotated in the direction of the arrow by a drive mechanism (not shown). A developer supply device 2 is disposed near the bottom of the counter electrode. This developer supply device 2 includes a solution supply roller that is partially immersed in a developer 2b containing charged colored particles in a tank 2a, contacts the counter electrode 1, and is rotated by a drive mechanism (not shown). 2c
is for pumping up the developer 2b and supplying it to the surface of the counter electrode 1. The surface of the counter electrode 1 supplied with the developer is covered with a developer film.
A recording electrode 3 is arranged above the counter electrode 1 at a constant distance therefrom. An insulating layer 3a is formed on the outer periphery of the recording electrode 3. A voltage is applied between the recording electrode 3 and the counter electrode 1 by a recording signal power source 4 according to the recording signal. A recording material 5 is arranged between the recording electrode 3 and the counter electrode 1, and the recording material 5 is transported by a transport device 6. This conveyance device 6 has rollers 6a rotated in the direction of the arrow by a drive mechanism (not shown).
and a guide plate 6b. A cleaning roller 7 that contacts the lower part of the counter electrode 1 and rotates in the opposite direction is provided. A bias electrode 8 is disposed above the recording material 5 and in the vicinity of the recording electrode 3 for forming an electric field to move the charged colored particles to the counter electrode 1. It is connected to a bias voltage power source 9 for setting the potential to a predetermined value. Further, a bias electrode 10 is disposed below the recording material 5 to form an electric field that moves the charged colored particles before they enter between the recording electrode 3 and the counter electrode 1 to the surface of the counter electrode 1. The bias electrode 10 is also connected to a bias voltage power supply 11 for setting its potential to a predetermined value.
上述のように構成された本発明の静電記録装置
によれば、バイアス電極８，１０と対向電極との
間に形成される電界の作用により荷電着色粒子が
対向電極１の表面に移動させられるため、現像液
膜の外表面には荷電着色粒子がほとんどない上澄
液が存在する状態となるため、記録電極３と対向
電極１との間に記録信号に応じた電圧が印加され
たとき記録材に荷電着色粒子が付着するので、記
録材３の地汚れは非常に少くなりコントラストの
高い画像を得ることができ、解像力を向上させる
ことができるという効果がある。 According to the electrostatic recording device of the present invention configured as described above, charged colored particles are moved to the surface of the counter electrode 1 by the action of the electric field formed between the bias electrodes 8 and 10 and the counter electrode. Therefore, a supernatant liquid with almost no charged colored particles exists on the outer surface of the developer film, so that when a voltage corresponding to the recording signal is applied between the recording electrode 3 and the counter electrode 1, recording is not possible. Since the charged colored particles adhere to the material, background stains on the recording material 3 are extremely reduced, an image with high contrast can be obtained, and the resolving power can be improved.
なお、記録材５の上方位置であつて記録電極３
の周囲にバイアス電極８がなく、記録材５の下方
位置に記録電極３と対向電極１との間に入る前の
荷電着色粒子を対向電極１の表面に移動させるバ
イアス電極１０を配設した場合であつても、現像
液膜の外表面に荷電着色粒子が非常に少ない状態
とすることができるから、記録材５の地汚れが非
常に少くなりコントラストの高い画像を得ること
ができ、解像力を向上させることができるという
効果がある。 Note that the recording electrode 3 is located above the recording material 5.
When there is no bias electrode 8 around the recording material 5, and a bias electrode 10 is provided below the recording material 5 to move the charged colored particles before they enter between the recording electrode 3 and the counter electrode 1 to the surface of the counter electrode 1. However, since the outer surface of the developer film can have very few charged colored particles, the background smear on the recording material 5 can be extremely reduced, and images with high contrast can be obtained, and the resolution can be improved. The effect is that it can be improved.
バイアス電極８，１０の電位をどのような値に
するかは、荷電着色粒子が正又は負の何れに帯電
しているか、および対向電極１の電位が何である
かにより決定される。すなわち、負に帯電された
荷電着色粒子を用い、記録電極３の電位が正の値
となるように記録電極３と対向電極１との間に記
録信号に応じて電圧を印加し、対向電極１の電位
を零とした場合には、バイアス電極８，１０の電
位を負の値としなければならない。また、負に帯
電された荷電着色粒子を用い、記録電極３の電位
が正の値となるように記録電極３と対向電極１の
間に記録信号に応じて電圧を印加し、対向電極１
の電位を記録信号に応じた電圧が印加されたとき
の記録電極３の電位より低い正の値とした場合に
は、バイアス電極８，１０の電位を負の値、零又
は対向電極１の電位より低い正の値としなければ
ならない。また、正に帯電された荷電着色粒子を
用い、記録電極３の電位が負の値になるように記
録電極３と対向電極１との間に記録信号に応じて
電圧を印加し、対向電極１の電位を零とした場合
には、バイアス電極８，１０の電位を正の値とし
なければならない。また、正に帯電された荷電着
色粒子を用い、記録電極３の電位が負の値になる
ように記録電極３と対向電極１との間に記録信号
に応じて電圧を印加し、対向電極１の電位を記録
信号に応じて電圧が印加されたときの記録電極３
の電位より高い負の値とした場合には、バイアス
電極８，１０の電位を正の値、零又は対向電極の
電位より高い負の値としなければならない。 The potential value of the bias electrodes 8 and 10 is determined depending on whether the charged colored particles are positively or negatively charged and the potential of the counter electrode 1. That is, using negatively charged colored particles, a voltage is applied between the recording electrode 3 and the counter electrode 1 according to the recording signal so that the potential of the recording electrode 3 becomes a positive value, and the counter electrode 1 When the potential of the bias electrodes 8 and 10 is set to zero, the potentials of the bias electrodes 8 and 10 must be set to negative values. Further, using negatively charged colored particles, a voltage is applied between the recording electrode 3 and the counter electrode 1 according to the recording signal so that the potential of the recording electrode 3 becomes a positive value.
When the potential of the bias electrodes 8 and 10 is set to a positive value lower than the potential of the recording electrode 3 when a voltage corresponding to the recording signal is applied, the potential of the bias electrodes 8 and 10 is set to a negative value, zero, or the potential of the counter electrode 1. Must be a lower positive value. Further, using positively charged colored particles, a voltage is applied between the recording electrode 3 and the counter electrode 1 according to the recording signal so that the potential of the recording electrode 3 becomes a negative value, and a voltage is applied between the recording electrode 3 and the counter electrode 1 according to the recording signal. When the potential of the bias electrodes 8 and 10 is set to zero, the potentials of the bias electrodes 8 and 10 must be set to positive values. Further, using positively charged colored particles, a voltage is applied between the recording electrode 3 and the counter electrode 1 according to the recording signal so that the potential of the recording electrode 3 becomes a negative value, and a voltage is applied between the recording electrode 3 and the counter electrode 1 according to the recording signal. Recording electrode 3 when a voltage is applied according to the recording signal
In this case, the potential of the bias electrodes 8 and 10 must be set to a positive value, zero, or a negative value higher than the potential of the counter electrode.
バイアス電極８は第１図に示すように記録電極
３と別に配設してもよく、第２図乃至第４図に示
すように記録電極３と一体的に配設してもよい。
記録電極３とバイアス電極８を一体的に配設する
場合には記録電極３とバイアス電極８とを電気的
に絶縁するためにその間に絶縁層１２を介在させ
る必要がある。第２図には記録電極３の先端３１
がバイアス電極８の先端面８１とほぼ同一面をな
す実施例が示されており、第３図には記録電極３
の先端３１がバイアス電極８の先端面８１より少
し突出する実施例が示されている。記録電極３と
対向電極１との間に荷電着色粒子が入る直前およ
びその間から出た直後に荷電着色粒子を対向電極
１の表面に移動させておく方が記録材５の地汚れ
を防止してコントラストの高い画像を得るために
良いから、記録電極３とバイアス電極８とを近接
する必要がある。しかし、記録電極３とバイアス
電極８とは一定間隔以上離さないと放電現象を起
こす。第３図に示すように記録電極３の先端３１
がバイアス電極８の先端面８１より少し突出した
構成の方が、第２図に示すように記録電極３の先
端３１がバイアス電極８の先端面８１とほぼ同一
面にある構成よりも、記録電極３の先端３１から
バイアス電極８の先端面８１までの距離が同じで
ある場合には、バイアス電極８の先端と記録電極
３の水平距離をより近づけることができる利点が
ある。第４図には記録電極３を２列状に絶縁層１
２に埋設すると共にそれらの列の間にバイアス電
極８を配設し、かつ、絶縁層１２の外側に記録電
極３を挾むようにバイアス電極８を配設した実施
例が示されている。このように構成した場合には
絶縁層１２の外側のみにバイアス電極８を配設し
た場合よりも記録材５の地汚れを防止することが
できる利点がある。なお、記録電極３が複数列状
をなす場合にはその各列間にバイアス電極８を配
設した方がよい。 The bias electrode 8 may be provided separately from the recording electrode 3 as shown in FIG. 1, or may be provided integrally with the recording electrode 3 as shown in FIGS. 2 to 4.
When the recording electrode 3 and the bias electrode 8 are arranged integrally, it is necessary to interpose an insulating layer 12 between the recording electrode 3 and the bias electrode 8 in order to electrically insulate them. FIG. 2 shows the tip 31 of the recording electrode 3.
An embodiment is shown in which the tip surface 81 of the bias electrode 8 is substantially flush with the tip surface 81 of the bias electrode 8, and FIG.
An embodiment is shown in which the tip 31 of the bias electrode 8 slightly protrudes from the tip surface 81 of the bias electrode 8. It is better to move the charged colored particles to the surface of the counter electrode 1 immediately before they enter between the recording electrode 3 and the counter electrode 1 and immediately after they exit from there, to prevent scumming on the recording material 5. The recording electrode 3 and the bias electrode 8 need to be placed close to each other because this is good for obtaining a high-contrast image. However, if the recording electrode 3 and the bias electrode 8 are not separated by a certain distance or more, a discharge phenomenon will occur. As shown in FIG. 3, the tip 31 of the recording electrode 3
A configuration in which the tip 31 of the recording electrode 3 protrudes a little beyond the tip surface 81 of the bias electrode 8 is better than a configuration in which the tip 31 of the recording electrode 3 is substantially flush with the tip surface 81 of the bias electrode 8, as shown in FIG. If the distance from the tip 31 of the bias electrode 8 to the tip surface 81 of the bias electrode 8 is the same, there is an advantage that the horizontal distance between the tip of the bias electrode 8 and the recording electrode 3 can be made closer. In FIG. 4, recording electrodes 3 are arranged in two rows on an insulating layer 1.
An embodiment is shown in which the bias electrodes 8 are embedded in the recording electrodes 2 and disposed between the columns, and the bias electrodes 8 are disposed outside the insulating layer 12 so as to sandwich the recording electrodes 3. This configuration has the advantage that scumming of the recording material 5 can be prevented more than when the bias electrode 8 is provided only on the outside of the insulating layer 12. Note that when the recording electrodes 3 are arranged in a plurality of rows, it is preferable to arrange the bias electrodes 8 between each row.
以下に本発明の一具体例を示す。 A specific example of the present invention is shown below.
直径40φのアースされた対向電極１に対して１
列の多針電極の両側にそれぞれ10mmのアルミ電極
板を固定した第１バイアス電極板８を対向電極１
から針電極部付近において0.3mmの距離に長さ20
mmの電極板を設置する第２のバイアス電極板１０
は対向電極１から0.5mm離し、その一方の先端が
第１のバイアス電極板８の端から0.5mm離した位
置に設置し、正常電粒子を含有する、着色粒子濃
度５ｇ／の現像液に対し第１，第２のバイアス
電極と対向電極間に＋25〜＋50ボルトのバイアス
を印加しながら、記録針に−400〜−600ボルトの
電圧を、針電極と対向電極間に４〜10mSecのパ
ルス信号で付与するとスポツト濃度は0.7〜1.0、
地肌濃度0.05の高コントラストのスポツト像が得
られた。 1 for 1 grounded counter electrode with a diameter of 40φ
A first bias electrode plate 8 with a 10 mm aluminum electrode plate fixed on each side of a row of multi-needle electrodes is connected to a counter electrode 1.
At a distance of 0.3 mm near the needle electrode part, the length is 20 mm.
Second bias electrode plate 10 on which an electrode plate of mm is installed
is placed 0.5 mm away from the counter electrode 1, and one of its tips is placed 0.5 mm away from the end of the first bias electrode plate 8, and is applied to a developing solution containing normal charged particles and a colored particle concentration of 5 g/. While applying a bias of +25 to +50 volts between the first and second bias electrodes and the counter electrode, a voltage of -400 to -600 volts is applied to the recording needle, and a pulse signal of 4 to 10 mSec is applied between the needle electrode and the counter electrode. When applied with , the spot density is 0.7 to 1.0,
A high contrast spot image with a background density of 0.05 was obtained.
同一条件で第二のバイアス電極を取り除くと地
肌濃度は0.15、第１第２の両バイアス電極を取り
除くと地肌濃度は0.4〜0.5となり、両バイアス極
板の地肌れ防止の効果は顕ちよであることがわか
つた。 Under the same conditions, when the second bias electrode is removed, the background density is 0.15, and when both the first and second bias electrodes are removed, the background density is 0.4 to 0.5, and the effect of both bias electrode plates on preventing background graying is obvious. I found out.
本発明の静電記録装置の記録電極を第５図から
第８図に示すように構成すれば、荷電着色粒子を
より有効に対向電極１の表面に移動させることが
でき、地汚れが少なくコントラストの高い画像を
得ることができる。 If the recording electrode of the electrostatic recording device of the present invention is configured as shown in FIGS. 5 to 8, charged colored particles can be more effectively moved to the surface of the counter electrode 1, and there is less background stain and contrast. It is possible to obtain high-quality images.
第５図に示す記録電極は、画像信号用電極針１
３とバイアス電圧用電極針１４を交互に、かつ、
一列状又は複数列状に絶縁層１５に埋設し、上記
画像信号用電極針１３をこれに記録信号に応じて
電圧を印加する記録信号分配器１６に接続し、か
つ、上記バイアス電圧用電極針１４をコンデンサ
１７に接続してなるものである。 The recording electrode shown in FIG. 5 is an image signal electrode needle 1.
3 and bias voltage electrode needle 14 alternately, and
The electrode needles 13 for the image signal are embedded in the insulating layer 15 in a row or in multiple rows, and are connected to a recording signal distributor 16 that applies a voltage according to the recording signal, and the electrode needles for the bias voltage 14 is connected to a capacitor 17.
このように構成された記録電極の画像信号用電
極針１３に記録信号に応じた電圧が印加された場
合には、これと同期して、バイアス電圧用電極針
１４には、上記画像信号用電極針１３の電位と同
極性であつてそれにより絶対値の小さい電位が誘
起されるすなわち、バイアス電圧が誘起される。
上記バイアス電圧用電極針１４の電位は、記録信
号に応じた電圧、隣接する画像信号用電極針１３
とバイアス電圧用電極針１４との間の静電容量、
記録信号に応じて電圧が印加されていない画像信
号用電極針１３の数、および、コンデンサ１７の
静電容量によつて決まる。 When a voltage corresponding to the recording signal is applied to the image signal electrode needle 13 of the recording electrode configured in this way, the bias voltage electrode needle 14 is synchronously applied with the image signal electrode needle 13 of the recording electrode configured in this way. A potential having the same polarity as the potential of the needle 13 and having a small absolute value is thereby induced, that is, a bias voltage is induced.
The potential of the bias voltage electrode needle 14 is a voltage corresponding to the recording signal, and the voltage of the adjacent image signal electrode needle 13 is
and the capacitance between the bias voltage electrode needle 14,
It is determined by the number of image signal electrode needles 13 to which no voltage is applied in accordance with the recording signal and the capacitance of the capacitor 17.
バイアス電圧用電極針１４の電位をどのような
関係式で表わすことができるかを説明する。隣接
する画線信号用電極針１３とバイアス電圧用電極
針１４との間の静電容量をC1とし、記録信号に
応じて電圧が印加されていない画像信号用電極針
１３（この画像信号用電極針１３の電位は零であ
る）の数をｎとし、および、コンデンサ１７の静
電容量をC2とした場合には、画像信号用電極針
１３とこれに隣接する２つのバイアス電圧用電極
針１４の間の静電容量は2C1となり、当該バイア
ス電圧用電極針１４とコンデンサ１４の接地側お
よび記録信号に応じて電圧が印加されていない画
像信号用電極針１３との間の合計の静電容量は
C2＋2nC1となる。いま、記録信号に応じた電圧
をV0とし、記録信号に応じて電圧が印加された
画像信号用電極針とその隣りのバイアス電圧用電
極針１４との電位差をV1とし、および、当該バ
イアス電圧用電極針１４の電位をV2とした場
合、V1＋V2＝V0であり、かつ、記録信号に応じ
た電圧の立ち上り時間を無視すれば2C1とC2＋
2nC1の逆比でV1とV2が決まる。したがつて、V2
＝２Ｃ１／２Ｃ１＋Ｃ２＋２ｎＣ１V0と表わすことがで
きる。 What kind of relational expression can express the potential of the bias voltage electrode needle 14 will be explained. The capacitance between the adjacent image signal electrode needle 13 and the bias voltage electrode needle 14 is C1 , and the image signal electrode needle 13 to which no voltage is applied according to the recording signal (for this image signal When the number of electrode needles 13 (the potential of which is zero) is n, and the capacitance of the capacitor 17 is C2 , the image signal electrode needle 13 and the two adjacent bias voltage electrodes The capacitance between the needles 14 is 2C 1 , and the total capacitance between the bias voltage electrode needle 14 and the ground side of the capacitor 14 and the image signal electrode needle 13 to which no voltage is applied according to the recording signal is The capacitance is
It becomes C 2 + 2nC 1 . Now, let V 0 be the voltage corresponding to the recording signal, V 1 be the potential difference between the image signal electrode needle to which a voltage is applied according to the recording signal and the bias voltage electrode needle 14 next to it, and the bias voltage If the potential of the voltage electrode needle 14 is V 2 , then V 1 + V 2 = V 0 , and if the rise time of the voltage according to the recording signal is ignored, 2C 1 and C 2 +
V 1 and V 2 are determined by the inverse ratio of 2nC 1 . Therefore, V 2
It can be expressed as =2C 1 /2C 1 +C 2 +2nC 1 V 0 .
第６図に示す記録電極は、画像信号用電極針１
３とバイアス電圧用電極針１４とを交互に、か
つ、一列状又は複数列状に（図示した実施例では
２列状に）絶縁層１５に埋設し、上記画像信号用
電極針１３これに記録信号に応じた電圧を印加す
る記録信号分配器１６に接続し、上記バイアス電
圧用電極針１４を抵抗Ｒを介してパルス電源回路
１８に接続してなるものである。上記画像信号用
電極針１３に記録信号に応じて電圧を印加するの
に同期して、パルス電源回路１８は、バイアス電
圧用電極針１４にパルス信号を入力して、バイア
ス電圧用電極針１４の電位を上記画像信号用電極
針１３の電位と同極性であつてそれより絶対値の
小さい値とする、すなわち、バイアス電圧用電極
針１４にバイアス電圧を印加する。 The recording electrode shown in FIG. 6 is an image signal electrode needle 1.
3 and bias voltage electrode needles 14 are embedded in the insulating layer 15 alternately in one row or in a plurality of rows (two rows in the illustrated embodiment), and the image signal electrode needles 13 are used to record information. It is connected to a recording signal distributor 16 that applies a voltage according to a signal, and the bias voltage electrode needle 14 is connected to a pulse power supply circuit 18 via a resistor R. In synchronization with the application of a voltage to the image signal electrode needle 13 according to the recording signal, the pulse power supply circuit 18 inputs a pulse signal to the bias voltage electrode needle 14 to control the bias voltage electrode needle 14. The potential is made to have the same polarity as the potential of the image signal electrode needle 13 and a smaller absolute value, that is, a bias voltage is applied to the bias voltage electrode needle 14.
第７図に示す記録電極は、画像信号用電極針１
９ａの外周にこれを包囲するように絶縁層１９ｂ
を形成してなる複数の電極単体１９を、バイアス
電極層２０に一列状又は複数列状に（図示した実
施例では２列状に）埋設し、上記画像信号用電極
針１９ａをこれに記録信号に応じて電圧を印加す
るための記録信号分配器１６に接続し、上記バイ
アス電極層２０をコンデンサ１７に接続してなる
ものである。上記画像信号用電極針１９ａに記録
信号に応じて電圧が印加された場合には、これと
同期して、バイアス電極層２０には、上記画像信
号用電極針１９ａの電位と同極性であつてそれよ
り絶対値の小さい電位が誘起される、すなわち、
バイアス電圧が誘起される。上記バイアス電極層
２０の電位は、記録信号に応じた電圧、画像信号
用電極針１９ａとバイアス電極層２０との間の静
電容量、記録信号に応じて電圧が印加されていな
い画像信号用電極針１９ａの数、および、コンデ
ンサ１７の静電容量によつて決まる。バイアス電
極層２０の電位を決める関係式は第５図に示す記
録電極の場合と同様に求めることができる。 The recording electrode shown in FIG. 7 is an image signal electrode needle 1.
An insulating layer 19b surrounds the outer periphery of 9a.
A plurality of electrode units 19 formed by the above are embedded in a bias electrode layer 20 in one row or in a plurality of rows (two rows in the illustrated embodiment), and the image signal electrode needles 19a are connected to the electrode needles 19a for recording signals. The bias electrode layer 20 is connected to a recording signal distributor 16 for applying a voltage according to the voltage, and the bias electrode layer 20 is connected to a capacitor 17. When a voltage is applied to the image signal electrode needle 19a in accordance with a recording signal, in synchronization with this, a voltage having the same polarity as the potential of the image signal electrode needle 19a is applied to the bias electrode layer 20. A potential with a smaller absolute value is induced, i.e.,
A bias voltage is induced. The potential of the bias electrode layer 20 is a voltage according to the recording signal, a capacitance between the image signal electrode needle 19a and the bias electrode layer 20, and an image signal electrode to which no voltage is applied according to the recording signal. It is determined by the number of needles 19a and the capacitance of capacitor 17. The relational expression for determining the potential of the bias electrode layer 20 can be obtained in the same manner as in the case of the recording electrode shown in FIG.
第８図に示す記録電極は、画像信号用電極針１
９ａの外周にこれを包囲するように絶縁層１９ｂ
を形成してなる複数の電極単体１９を、バイアス
電極層２０に一列状又は複数列状に（図示した実
施例では２列状に）埋設し、上記画像信号用電極
針１９ａを記録信号分配器１６に接続し、かつ、
上記バイアス電極層２０を抵抗Ｒを介してパルス
電源回路１８に接続してなるものである。上記画
像信号用電極針１９ａに記録信号に応じて電圧を
印加するのに同期して、パルス電源回路１８は、
バイアス電極層２０にパルス信号を入力して、バ
イアス電極層２０の電位を上記画像信号用電極針
１９ａの電位と同極性であつてそれより絶対値の
小さい値とする、すなわち、バイアス電極層２０
にバイアス電圧を印加する。 The recording electrode shown in FIG. 8 is an image signal electrode needle 1.
An insulating layer 19b surrounds the outer periphery of 9a.
A plurality of electrode units 19 formed by the above are embedded in a bias electrode layer 20 in a row or in a plurality of rows (in the illustrated embodiment, two rows), and the image signal electrode needles 19a are connected to a recording signal distributor. 16, and
The bias electrode layer 20 is connected to the pulse power supply circuit 18 via a resistor R. In synchronization with applying a voltage to the image signal electrode needle 19a according to the recording signal, the pulse power supply circuit 18
A pulse signal is input to the bias electrode layer 20 to set the potential of the bias electrode layer 20 to a value that has the same polarity as the potential of the image signal electrode needle 19a and has a smaller absolute value, that is, the bias electrode layer 20
Apply bias voltage to .
第５図乃至第８図に示す記録電極を用いる場合
には、対向電極１の電位を、記録信号に応じて電
圧が印加された画像信号用電極針１３，１９ａの
電位と同極であつてその電位より絶対値が小さい
値であり、かつ、バイアス電圧用電極針１４およ
びバイアス電極層２０の電位より絶対値が大きい
値となるようにしなければならない。このように
すると、バイアス電圧用電極針１４およびバイア
ス電極層２０と対向電極１との間に形成される電
界の作用により荷電着色粒子が対向電極１の表面
に移動させられるから、記録材５の地汚れが非常
に少なくなりコントラストの高い画像を得ること
ができる。 When using the recording electrodes shown in FIGS. 5 to 8, the potential of the counter electrode 1 should be the same polarity as the potential of the image signal electrode needles 13, 19a to which a voltage is applied according to the recording signal. The absolute value must be smaller than that potential, and the absolute value must be larger than the potentials of the bias voltage electrode needle 14 and the bias electrode layer 20. In this way, the charged colored particles are moved to the surface of the counter electrode 1 by the action of the electric field formed between the bias voltage electrode needle 14 and the bias electrode layer 20, and the counter electrode 1. Background smudges are greatly reduced and images with high contrast can be obtained.
本発明の静電記録装置には、ローラ状の対向電
極を乾式の荷電着色粒子で覆い、そのほかは第１
図示す静電記録装置と同じである型式の静電記録
装置も含まれ、この型式の静電記録装置によれ
ば、バイアス電極と対向電極との間に形成される
電界により荷電着色粒子が対向電極の表面に移動
させられるから、荷電着色粒子が広範囲にわたつ
て記録電極の方へ移動することはなく、記録材の
地汚れが非常に少なくなりコントラストの高い画
像を得ることができ、解像力を向上させることが
できる。 In the electrostatic recording device of the present invention, a roller-shaped counter electrode is covered with dry charged colored particles, and the other parts are covered with a first electrode.
It also includes an electrostatic recording device of the same type as the electrostatic recording device shown in the figure, and according to this type of electrostatic recording device, charged colored particles are opposed by an electric field formed between a bias electrode and a counter electrode. Because they are moved to the surface of the electrode, the charged colored particles do not move over a wide area toward the recording electrode, which greatly reduces background stains on the recording material, making it possible to obtain images with high contrast and improving resolution. can be improved.
第１図は本発明の静電記録装置の一実施例を示
す配置図、第２図乃至第４図は同上装置の主要部
を示す縦断面図、第５図乃至第８図は同上装置に
用いる記録電極を示す配置図である。
１……対向電極、３……記録電極、５……記録
材、８，１０……バイアス電極、１３，１９ａ…
…画像信号用電極針、１４……バイアス電圧用電
極針、２０……バイアス電極層。
FIG. 1 is a layout diagram showing an embodiment of the electrostatic recording device of the present invention, FIGS. 2 to 4 are longitudinal cross-sectional views showing the main parts of the same device, and FIGS. 5 to 8 are diagrams showing the same as the above device. FIG. 3 is a layout diagram showing recording electrodes used. 1... Counter electrode, 3... Recording electrode, 5... Recording material, 8, 10... Bias electrode, 13, 19a...
... Electrode needle for image signal, 14... Electrode needle for bias voltage, 20... Bias electrode layer.
Claims (1)
現像液を表面に担持して回転する対向電極と、こ
の対向電極に対向する複数の記録電極針と、上記
対向電極と記録電極針との間に記録材を移送する
とともに、書画信号に応じた電圧を印加して、記
録材を横切つて電界を形成させ、その作用により
現像液中に含まれている荷電着色粒子を記録材に
付着させる静電記録装置において上記電極針の周
辺に第１バイアス電極を配置し、上記対向電極の
回転方向において上記記録電極針よりも上流側に
おける上記現像液供給装置と上記記録電極との間
であり、かつ、上記対向電極に近接した位置に第
２バイアス電極を配置し、第１および第２のバイ
アス電極と対向電極の間に電界を形成してこの電
界の作用により対向電極の表面を覆つている現像
液中の荷電着色粒子を対向電極の表面に移動せし
め、前記記録電極と前記対向電極の間に記録信号
を与えて前記記録材を横切つて電界を形成させ、
前記対向電極の表面に移動されている荷電着色粒
子を前記記録信号による電界の影響により前記記
録材の記録面に付着させることを特徴とする静電
記録装置。1. A counter electrode that rotates while carrying a developer on its surface in a developer supply device in which charged colored particles are dispersed, a plurality of recording electrode needles facing the counter electrode, and a space between the counter electrode and the recording electrode needles. At the same time, a voltage corresponding to the writing/image signal is applied to form an electric field across the recording material, and this action causes the charged colored particles contained in the developer to adhere to the recording material. A first bias electrode is disposed around the electrode needle in the electrostatic recording device, and is between the developer supply device and the recording electrode on the upstream side of the recording electrode needle in the rotation direction of the counter electrode, A second bias electrode is disposed close to the counter electrode, an electric field is formed between the first and second bias electrodes and the counter electrode, and the surface of the counter electrode is covered by the action of this electric field. moving charged colored particles in a developer to the surface of a counter electrode, applying a recording signal between the recording electrode and the counter electrode to form an electric field across the recording material;
An electrostatic recording device characterized in that charged colored particles being moved to the surface of the counter electrode are made to adhere to the recording surface of the recording material under the influence of an electric field caused by the recording signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP572076A JPS5289325A (en) | 1976-01-20 | 1976-01-20 | Electrostatic recording system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP572076A JPS5289325A (en) | 1976-01-20 | 1976-01-20 | Electrostatic recording system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5289325A JPS5289325A (en) | 1977-07-26 |
| JPS6141755B2 true JPS6141755B2 (en) | 1986-09-17 |
Family
ID=11618945
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP572076A Granted JPS5289325A (en) | 1976-01-20 | 1976-01-20 | Electrostatic recording system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5289325A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54157626A (en) * | 1978-06-02 | 1979-12-12 | Nippon Telegr & Teleph Corp <Ntt> | Recording method |
-
1976
- 1976-01-20 JP JP572076A patent/JPS5289325A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5289325A (en) | 1977-07-26 |
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