JPH0357865B2 - - Google Patents
Info
- Publication number
- JPH0357865B2 JPH0357865B2 JP19521281A JP19521281A JPH0357865B2 JP H0357865 B2 JPH0357865 B2 JP H0357865B2 JP 19521281 A JP19521281 A JP 19521281A JP 19521281 A JP19521281 A JP 19521281A JP H0357865 B2 JPH0357865 B2 JP H0357865B2
- Authority
- JP
- Japan
- Prior art keywords
- electrodes
- needle
- electrode
- counter
- magnetic ink
- 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
- 230000005389 magnetism Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 9
- 239000011295 pitch Substances 0.000 description 8
- 239000011159 matrix material Substances 0.000 description 6
- 238000005530 etching Methods 0.000 description 2
- 230000005684 electric field Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/015—Ink jet characterised by the jet generation process
- B41J2/04—Ink jet characterised by the jet generation process generating single droplets or particles on demand
- B41J2/06—Ink jet characterised by the jet generation process generating single droplets or particles on demand by electric or magnetic field
- B41J2/065—Ink jet characterised by the jet generation process generating single droplets or particles on demand by electric or magnetic field involving the preliminary making of ink protuberances
Landscapes
- Particle Formation And Scattering Control In Inkjet Printers (AREA)
- Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
Description
【発明の詳細な説明】
本発明は、磁性インク記録装置にかするもので
あつて、内攻電極を２列千鳥状に配することによ
り、取り扱いが簡易で、均一かつノイズの少ない
画像を記録できる磁性インク記録装置を提供する
ものである。DETAILED DESCRIPTION OF THE INVENTION The present invention is a magnetic ink recording device that is easy to handle and records uniform images with less noise by arranging internal electrodes in two rows in a staggered manner. The purpose of the present invention is to provide a magnetic ink recording device that can.
第１図に従来の磁性インク記録装置の記録部の
断面図を示す。この図に於いて、スタイラス基台
１９上に配された針電極５は、***用磁石１５に
より磁化されている。一方インク室１８内に送ら
れた磁性インク１７は、***用磁石１５と供給用
スリツト磁石１６が作るスリツト部を通じて針電
極５の先端に送られる。支持台２上に固定されて
いる対向電極１は、記録紙１１を介して針電極５
と対向している。この針電極５と対向電極１との
間には常にバイアス電圧が印加されており、針電
極５の正の高圧パルス信号、対向電極１に負の高
圧パルス信号が印加されると、記録紙１１と針電
極５の先端の磁性インク１７間の電界強度が増
し、針電極５の先端の磁性インク１７に作用する
クーロンカでもつて、磁性インク１７が記録紙１
１上に飛翔する。 FIG. 1 shows a cross-sectional view of a recording section of a conventional magnetic ink recording device. In this figure, a needle electrode 5 placed on a stylus base 19 is magnetized by a bump magnet 15. On the other hand, the magnetic ink 17 sent into the ink chamber 18 is sent to the tip of the needle electrode 5 through the slit portion formed by the bump magnet 15 and the supply slit magnet 16. A counter electrode 1 fixed on a support base 2 is connected to a needle electrode 5 via a recording paper 11.
is facing. A bias voltage is always applied between the needle electrode 5 and the counter electrode 1, and when a positive high voltage pulse signal is applied to the needle electrode 5 and a negative high voltage pulse signal is applied to the counter electrode 1, the recording paper 11 The strength of the electric field between the magnetic ink 17 at the tip of the needle electrode 5 increases, and even the magnetic ink 17 acts on the magnetic ink 17 at the tip of the needle electrode 5.
Fly above 1.
第２図に従来の対向電極の概略構成図を示す。
この図で対向電極１は絶縁性基台３の上にエツチ
ング等の方法で等ピツチ（例えば２mm、電極間距
離200μｍ）で形成されていて、コネクター４に
より高圧パルス発生回路に接続される。 FIG. 2 shows a schematic configuration diagram of a conventional counter electrode.
In this figure, counter electrodes 1 are formed on an insulating base 3 by a method such as etching at equal pitches (for example, 2 mm, distance between electrodes 200 μm), and are connected to a high voltage pulse generation circuit by a connector 4.
この第２図に示した対向電極１と針電極５との
従来例のマトリツクス構成図を第３図に示す。針
電極５は等ピツチ（記録密度が８ドツト／mmの場
合は125μｍピツチ）で配されており32本おきに
電気的に接続されている。対向電極１のピツチは
針電極16本分に相当し、第１の対向電極１ａには
１番から４番までの針電極が対向しており、第２
の対向電極１ｂには５番から20番までの針電極が
対向しており、第３の対向電極１ｃには２１番か
ら37番の針電極が対向している。以下このように
１６本の針電極５に体し１個の対向電極が対向し
ている。このマトリツクス構成を用いて画像の記
録を行う場合、まず針電極制御回路８より針電極
高圧パルス発生回路６ａに制御信号が送られ、１
番目から32本おきの針電極５に選択信号が送られ
る。このとき１番目、33番目、65番目等の針電極
５に対応するドツトに画像がある場合、その針電
極５が対向している対向電極１に、対向電極制御
回路９からの画信号に対応した制御信号により対
向電極高圧パルス発生回路７によつて作られた高
圧パルス信号が加えられる。一方針電極５の対向
電極間にはバイアス電源１０によりDCのバイア
スが加えられていて、針電極５と対向電極１との
相方に高圧パルスが加えられると針電極５の先端
の磁性インク１７が飛翔し画像を形成する。この
ように針電極高圧パルス発生回路６を順次６ａか
ら６ｚまで選択し、それぞれの針電極５に対向し
た対向電極１を用いて、順次画像を形成してゆ
く。しかしながら対向電極１ａと対向電極１ｂの
間など、各対向電極１間のギヤツプは電極間どう
しの耐圧によりあまり小さくすることはできない
（第２図の場合は200μｍ）。又針電極５と対向電
極１との位置合わせの精度上の問題などから、対
向電極１のギヤツプ付近に対向する針電極５で記
録する場合は左右両方の対向電極に同一の画信号
を入れて記録を行わなけれはならない。たとえば
第３図の針電極５ｂから針電極５ｈを記録する場
合は、対向電極１ａと対向電極１ｂの両方に画信
号に対応した高圧パルスを印加する。この場合に
対向電極１ａ，１ｂに接している記録紙上に表わ
れる表面電位の分布を第４図に示す。この図で上
段に示したグラフは蒸気紙１１上での主走査方向
への電位分布を示しており、破線は対向電極１
ａ、対向電極１ｂ単独に電極を印加した場合であ
り、実線は両方の対向電極に電圧を印加した場合
である。このグラフで示した様に２個の対向電極
１に電圧を印加した場合、対向電極１間のギヤツ
プ付近の電位が高くなる。従つてこの様な状態で
前記を行うと、対向電極１を２個印加して記録す
る部分の磁性インクが非常に飛翔しやすくなり、
この部分だけが他の部分よりも濃度が高くなり記
録ラムを生じる。又、記録紙１１上の表面電位が
高くなりすぎるため、高圧パルスが印加されてい
ない針電極５からも磁性インクが、バイアス電圧
と記録紙１１の表面電位により飛翔してしまう。
その結果非常にノズルの多い画像になつてしま
う。 A conventional matrix configuration diagram of the counter electrode 1 and the needle electrode 5 shown in FIG. 2 is shown in FIG. The needle electrodes 5 are arranged at equal pitches (125 μm pitch when the recording density is 8 dots/mm) and are electrically connected every 32 needles. The pitch of the counter electrode 1 corresponds to 16 needle electrodes, and needle electrodes numbered 1 to 4 face the first counter electrode 1a, and the needle electrodes numbered 1 to 4 are opposed to the first counter electrode 1a.
Needle electrodes numbered 5 to 20 are opposed to the counter electrode 1b, and needle electrodes numbered 21 to 37 are opposed to the third counter electrode 1c. As described above, the 16 needle electrodes 5 are arranged so that one counter electrode faces them. When recording an image using this matrix configuration, first, a control signal is sent from the needle electrode control circuit 8 to the needle electrode high voltage pulse generation circuit 6a.
A selection signal is sent to every 32 needle electrodes 5 from the th. At this time, if there is an image on a dot corresponding to the 1st, 33rd, 65th, etc. needle electrode 5, the image signal from the counter electrode control circuit 9 is applied to the counter electrode 1 that the needle electrode 5 is facing. A high voltage pulse signal generated by the counter electrode high voltage pulse generation circuit 7 is added based on the control signal. On the other hand, a DC bias is applied between the opposing electrodes of the needle electrode 5 by a bias power supply 10, and when a high voltage pulse is applied to the partner of the needle electrode 5 and the opposing electrode 1, the magnetic ink 17 at the tip of the needle electrode 5 is It flies and forms an image. In this way, the needle electrode high voltage pulse generation circuits 6 are sequentially selected from 6a to 6z, and images are sequentially formed using the counter electrode 1 facing each needle electrode 5. However, the gap between the opposing electrodes 1, such as between the opposing electrodes 1a and 1b, cannot be made very small due to the withstand voltage between the electrodes (200 μm in the case of FIG. 2). Also, due to problems with the accuracy of alignment between the needle electrode 5 and the counter electrode 1, when recording with the needle electrodes 5 facing each other near the gap of the counter electrode 1, the same image signal should be input to both the left and right counter electrodes. Records must be made. For example, when recording from the needle electrode 5b to the needle electrode 5h in FIG. 3, a high voltage pulse corresponding to the image signal is applied to both the counter electrode 1a and the counter electrode 1b. FIG. 4 shows the distribution of surface potential appearing on the recording paper in contact with the counter electrodes 1a and 1b in this case. The graph shown in the upper part of this figure shows the potential distribution in the main scanning direction on the steam paper 11, and the broken line shows the potential distribution in the main scanning direction on the steam paper 11.
a shows the case where the electrode is applied to the counter electrode 1b alone, and the solid line shows the case where the voltage is applied to both the counter electrodes. When a voltage is applied to the two opposing electrodes 1 as shown in this graph, the potential near the gap between the opposing electrodes 1 becomes high. Therefore, if the above is carried out in such a state, the magnetic ink in the area to be recorded by applying two opposing electrodes 1 will be extremely likely to fly away.
Only this portion has a higher density than other portions, resulting in a recording ram. In addition, since the surface potential on the recording paper 11 becomes too high, magnetic ink flies off even from the needle electrode 5 to which no high voltage pulse is applied due to the bias voltage and the surface potential of the recording paper 11.
As a result, the image becomes an image with many nozzles.
本発明は以上の様な問題点を解決するものであ
り、非常に簡単な構成により濃度ムラ、磁性イン
クのノイル飛翔のない磁性インク記録装置を提供
するものである。 The present invention solves the above-mentioned problems, and provides a magnetic ink recording device which has a very simple structure and is free from uneven density and no flying magnetic ink.
以下本発明の具体的構成を第５図、第６図を用
いて説明する。第４図は本発明による磁性インク
記録装置の対向電極の概略構成図である。絶縁性
の基台３上にエツチング等の手段により２列の等
ピツチの対向電極を1/2ピツチずらせて配列（以
後これを千鳥対向電極１２と称する）し、支持台
２に固定されている。この千鳥対向電極１２はコ
ネクター４を介して高圧パルス発生回路（図示せ
ず）に接続される。 The specific configuration of the present invention will be described below with reference to FIGS. 5 and 6. FIG. 4 is a schematic diagram of the counter electrode of the magnetic ink recording device according to the present invention. On an insulating base 3, two rows of equally spaced counter electrodes are arranged with a 1/2 pitch shift (hereinafter referred to as staggered counter electrodes 12) by means such as etching, and are fixed to the support base 2. . The staggered counter electrodes 12 are connected to a high voltage pulse generation circuit (not shown) via a connector 4.
第６図に本発明による千鳥対向電極１２を用い
た磁性インク記録装置のマトリツクス構成図を示
す。針電極５は等ピツチ（記録密度が８ドツト／
mmの場合は125μｍピツチ）で配されており32本
おきに電気的に接続されている。千鳥対向電極１
２の１ピツチは針電極５の16本分に相当してお
り、第１の千鳥対向電極１２ａには、１番から４
番の針電極５が対応し、第２の千鳥対向電極１２
ｂには１番から12番までの針電極５が対応し、第
３の千鳥対向電極１２ｃには、５番から20番まで
の針電極５が対応し、第４の千鳥対向電極１２ｄ
には13番から28番までの針電極５が対応してい
る。以下同様に16本づつの針電極５が１つの千鳥
対向電極１２に対向している。この様に対向電極
を配置することにより対向電極間のギヤツプを無
くすことができる。このマトリツクス構成を用い
て記録を行う場合、まず電極制御回路８より針電
極高圧パルス発生回路６ａに制御信号が送られ、
１番目から32本おきの針電極５に高圧パルスが印
加される。このとき１番目、33番目、65番目等32
本おきの針電極５に対応するドツトに画像がある
場合、その該当する針電極５が対向している千鳥
対向電極１２に千鳥対向電極制御回路１４からの
画信号に対応した制御信号により千鳥対向電極高
圧パルス発生回路１３によつて作られた高圧パル
ス信号が印加かれる。このように針電極高圧パル
ス発生回路６を順次６ａから６ｚまで選択し、そ
れぞれの針電極５に対向した千鳥対向電極１２を
用いて画像を記録していく。この場合１番から８
番までの針電極で記録する場合には千鳥対向電極
１２ｂを、９番から16番までの針電極５で記録す
る場合には千鳥対向電極１２ｃを、17番から24番
までの針電極５で記録する場合は千鳥対向電極１
２ｄを、という様に常に千鳥対向電極１２の中央
付近のみを針電極５に対向させて記録するように
する。こうすると同時に２個の千鳥対向電極を使
用して磁性インクを飛翔させるという状態を排除
できる。 FIG. 6 shows a matrix configuration diagram of a magnetic ink recording device using staggered counter electrodes 12 according to the present invention. The needle electrodes 5 are arranged at equal pitch (recording density is 8 dots/
mm, they are arranged at a pitch of 125 μm), and every 32 wires are electrically connected. Staggered counter electrode 1
1 pitch of 2 corresponds to 16 needle electrodes 5, and the first staggered opposing electrode 12a has 1 to 4 needle electrodes.
The numbered needle electrode 5 corresponds to the second staggered counter electrode 12.
Needle electrodes 5 numbered 1 to 12 correspond to b, needle electrodes 5 numbered 5 to 20 correspond to the third staggered counter electrode 12c, and needle electrodes 5 numbered 5 to 20 correspond to the fourth staggered counter electrode 12d.
Needle electrodes 5 from No. 13 to No. 28 correspond to the above. Similarly, 16 needle electrodes 5 each face one staggered opposing electrode 12. By arranging the opposing electrodes in this manner, a gap between the opposing electrodes can be eliminated. When recording using this matrix configuration, first a control signal is sent from the electrode control circuit 8 to the needle electrode high voltage pulse generation circuit 6a.
A high voltage pulse is applied to every 32 needle electrodes 5 from the first. At this time, 1st, 33rd, 65th etc. 32
When there is an image on a dot corresponding to every other needle electrode 5, the corresponding needle electrode 5 is placed in a staggered manner by a control signal corresponding to an image signal from the staggered counter electrode control circuit 14 to the facing staggered counter electrode 12. A high voltage pulse signal generated by the electrode high voltage pulse generation circuit 13 is applied. In this way, the needle electrode high-voltage pulse generating circuits 6 are sequentially selected from 6a to 6z, and images are recorded using the staggered opposing electrodes 12 facing each needle electrode 5. In this case, numbers 1 to 8
When recording with needle electrodes Nos. 5 to 16, use the staggered opposing electrodes 12b, when recording with needle electrodes 5 from No. 9 to 16, use the staggered opposing electrodes 12c, and when recording with needle electrodes 5 from No. 17 to 24. When recording, staggered opposing electrode 1
2d, so that only the center of the staggered opposing electrode 12 is always opposed to the needle electrode 5 for recording. At the same time, it is possible to eliminate the situation in which magnetic ink is caused to fly using two staggered opposing electrodes.
以上のように本発明によれば対向電極を２列千
鳥状に配し、常に１個の対向電極のみを使用して
記録を行うことにより、前記紙表面電位を常に一
定にして記録ができ、記録紙表面電位が変動する
ことによる濃度ムラ、磁性インクのノズル飛翔を
防止し鮮明な画像を得ることができる。さらに、
本発明によれば千鳥対向電極の中央付近にのみ対
向した針電極により記録を行うため、針電極と千
鳥対向電極の主走査方向の位置合せ精度も粗くて
良く、又千鳥対向電極の製造精度も粗くて良い。 As described above, according to the present invention, by arranging the counter electrodes in two rows in a staggered manner and performing recording using only one counter electrode at all times, it is possible to perform recording while keeping the paper surface potential always constant. It is possible to obtain clear images by preventing density unevenness and magnetic ink nozzle flying caused by fluctuations in recording paper surface potential. moreover,
According to the present invention, since recording is performed using the needle electrodes facing only near the center of the staggered counter electrodes, the alignment accuracy of the needle electrodes and the staggered counter electrodes in the main scanning direction does not need to be coarse, and the manufacturing accuracy of the staggered counter electrodes can also be improved. Rough and good.
第１図は従来の磁性インク記録装置の記録部の
横断面図、第２図は同部の対向電極の概略図、第
３図は同部の針電極、対向電極のマトリツクス構
成図、第４図は同対向電極を使用した場合の記録
紙表面電位を示す説明図、第５図は本発明による
磁性インク記録装置の対向電極の概略図、第６図
は同装置の針電極、対向電極のマトリツクス構成
図である。
１……対向電極、２……支持台、３……基台、
４……接続コネクター、５……針電極、６……針
電極高圧パルス発生回路、７……対向電極高圧パ
ルス発生回路、８……針電極制御回路、９……対
向電極制御回路、１０……バイアス電源、１１…
…記録紙、１２……千鳥対向電極、１３……千鳥
対向電極高圧パルス発生回路、１４……千鳥対向
電極制御回路、１５……***用磁石、１６……供
給用スリツト磁石、１７……磁性インク、１８…
…インク室、１９……スタイラス基台。
FIG. 1 is a cross-sectional view of a recording section of a conventional magnetic ink recording device, FIG. 2 is a schematic diagram of a counter electrode in the same section, FIG. 3 is a matrix configuration diagram of a needle electrode and a counter electrode in the same section, and FIG. The figure is an explanatory diagram showing the surface potential of the recording paper when the same counter electrode is used. FIG. 5 is a schematic diagram of the counter electrode of the magnetic ink recording device according to the present invention. FIG. FIG. 3 is a matrix configuration diagram. 1... Counter electrode, 2... Support stand, 3... Base,
4... Connector, 5... Needle electrode, 6... Needle electrode high voltage pulse generation circuit, 7... Counter electrode high voltage pulse generation circuit, 8... Needle electrode control circuit, 9... Counter electrode control circuit, 10... ...bias power supply, 11...
...Recording paper, 12...Staggered counter electrode, 13...Staggered counter electrode high voltage pulse generation circuit, 14...Staggered counter electrode control circuit, 15...Elevation magnet, 16...Slit magnet for supply, 17...Magnetism Ink, 18...
...Ink chamber, 19...Stylus base.
Claims (1)
かつ一つの列を形成する複数本の針電極と、前記
針電極の列を挟むように２列に配することにより
前記針電極と対向する複数個の対向電極と、前記
針電極に選択信号および前記対向電極に画信号を
それぞれ印加し、前記対向電極の近傍に配した記
録紙上に前記針電極の先端より磁性インクを飛翔
せしめる飛翔手段とを備え、前記対向電極の一個
が前記針電極の複数個と対向し、かつ前記対向電
極のうち一方の列を形成する対向電極と他方の列
を形成する対向電極が互いに千鳥状に配され、か
つ一方の列を形成する対向電極の一個が他方の列
を形成する対向電極の二個と対向するように配さ
れた磁性インク記録装置において、記録の際には
前記対向電極の中央付近のみを前記針電極に対向
させて記録することを特徴とする磁性インク記録
装置。1 Use magnetism to hold magnetic ink at the tip,
and a plurality of needle electrodes forming one row, a plurality of counter electrodes arranged in two rows so as to sandwich the row of needle electrodes to face the needle electrodes, and a selection signal and a signal to the needle electrodes. flying means for applying an image signal to each of the opposing electrodes and causing magnetic ink to fly from the tip of the needle electrode onto a recording paper disposed near the opposing electrode, one of the opposing electrodes being one of the plurality of needle electrodes; The counter electrodes forming one row of the counter electrodes and the counter electrodes forming the other row are arranged in a staggered manner, and one of the counter electrodes forming one row is connected to the other counter electrode. A magnetic ink recording device arranged to face two opposing electrodes forming a row, characterized in that during recording, only the central portion of the opposing electrodes is opposed to the needle electrode. Magnetic ink recording device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19521281A JPS5896571A (en) | 1981-12-03 | 1981-12-03 | Magnetic ink recorder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19521281A JPS5896571A (en) | 1981-12-03 | 1981-12-03 | Magnetic ink recorder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5896571A JPS5896571A (en) | 1983-06-08 |
| JPH0357865B2 true JPH0357865B2 (en) | 1991-09-03 |
Family
ID=16337318
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19521281A Granted JPS5896571A (en) | 1981-12-03 | 1981-12-03 | Magnetic ink recorder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5896571A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9404741D0 (en) * | 1994-03-10 | 1994-04-27 | Domino Printing Sciences Plc | Electrode assembly for a continuous ink jet printer |
| US5997133A (en) * | 1996-11-21 | 1999-12-07 | Nec Corporation | Inkjet recording apparatus having a minimum number of ejection electrode driving circuits and method for driving same |
-
1981
- 1981-12-03 JP JP19521281A patent/JPS5896571A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5896571A (en) | 1983-06-08 |
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