JPH0450189B2 - - Google Patents
Info
- Publication number
- JPH0450189B2 JPH0450189B2 JP21097682A JP21097682A JPH0450189B2 JP H0450189 B2 JPH0450189 B2 JP H0450189B2 JP 21097682 A JP21097682 A JP 21097682A JP 21097682 A JP21097682 A JP 21097682A JP H0450189 B2 JPH0450189 B2 JP H0450189B2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- ink
- magnetic ink
- stylus
- printer
- 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
- 238000010438 heat treatment Methods 0.000 claims description 11
- 230000008859 change Effects 0.000 claims description 2
- 230000014759 maintenance of location Effects 0.000 claims description 2
- 230000035699 permeability Effects 0.000 claims description 2
- 241001422033 Thestylus Species 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 229910000859 α-Fe Inorganic materials 0.000 description 6
- 239000011553 magnetic fluid Substances 0.000 description 5
- 239000000696 magnetic material Substances 0.000 description 5
- 230000005415 magnetization Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000012546 transfer Methods 0.000 description 5
- 239000002245 particle Substances 0.000 description 3
- 230000005684 electric field Effects 0.000 description 2
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 description 1
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 description 1
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 description 1
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 description 1
- 239000005642 Oleic acid Substances 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 229940121375 antifungal agent Drugs 0.000 description 1
- 239000003429 antifungal agent Substances 0.000 description 1
- LYKJEJVAXSGWAJ-UHFFFAOYSA-N compactone Natural products CC1(C)CCCC2(C)C1CC(=O)C3(O)CC(C)(CCC23)C=C LYKJEJVAXSGWAJ-UHFFFAOYSA-N 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 description 1
- 239000003350 kerosene Substances 0.000 description 1
- 230000005381 magnetic domain Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000005499 meniscus Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 239000000080 wetting agent Substances 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
Landscapes
- Particle Formation And Scattering Control In Inkjet Printers (AREA)
- Dot-Matrix Printers And Others (AREA)
- Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
Description
【発明の詳細な説明】
本発明は磁気インクを使用し普通紙に直接記録
できるプリンタに関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a printer that can directly record on plain paper using magnetic ink.
OA機器が普及し、その用途が多様化すること
によつて情報出力端末としてのプリンタにも、高
精細・高速であること、低価格であり、ランニン
グリコストが安いこと、またメンテが容易なこと
が要求されている。以上の要求を満たす記憶方式
として、インクジエツト記録方式、熱転写記録方
式、通電転写記録方式等があり、各所で開発研
究、商品化が勧められている。しかし各方式共
に、一長一短があり、商品化に際して解決すべき
問題がある。インクジエツトは信頼性、特にノズ
ルの目詰まりに問題があり、熱転写においては感
熱ヘツドの立ち下がり時間がかかり、現行では、
くり返し周期２ｍsec／dot程度が限界であるこ
と、また熱転写、通電転写共にインクシートが比
較的コスト高につくこと、解像度に問題があるこ
とが、商品の普及化の障害になつている。このう
ち、インクジエツト方式の欠点がある目詰まりを
なくしたものとして、ノズルレスのマグネトフイ
ルドグラフイー方式がある。（昭和55年度画像電
子学会第８回全国大会予稿10）この方式は磁化し
たスタイラス先端に磁気インクを供給させ、メニ
スカスを形成させ、静電引力のスイツチングによ
りインクを飛翔させるものであるが、信号電圧が
数百ボルトと高いため、IC駆動は不可能である。
このため、ヘツドの実装が複雑となり、安価でコ
ンパクトなものをつくることは難しい。 With the spread of office automation equipment and the diversification of its uses, printers as information output terminals also require high definition, high speed, low price, low running costs, and easy maintenance. That is required. As storage systems that meet the above requirements, there are inkjet recording systems, thermal transfer recording systems, electrical transfer recording systems, etc., and their development, research, and commercialization are recommended in various places. However, each method has its advantages and disadvantages, and there are problems that need to be resolved before commercialization. Ink jets have problems with reliability, especially nozzle clogging, and in thermal transfer, it takes a long time for the thermal head to cool down.
The limitations of the repetition rate of about 2 msec/dot, the relatively high cost of ink sheets for both thermal transfer and electrical transfer, and problems with resolution are obstacles to the widespread use of the product. Among these methods, there is a nozzle-less magnetic field graphics method that eliminates clogging, which is a disadvantage of the inkjet method. (Preliminary 10 of the 8th National Conference of the Japan Society of Image Electronics Engineers, 1980) This method supplies magnetic ink to the tip of a magnetized stylus, forms a meniscus, and causes the ink to fly by switching electrostatic attraction. Since the voltage is high, several hundred volts, it is impossible to drive an IC.
For this reason, the implementation of the head becomes complicated, and it is difficult to make an inexpensive and compact one.
本発明の目的は上記問題を解決し、複雑な構造
や高電圧印加を不用としながら高密度、高解像度
の記録を可能とする磁気インクを使用したプリン
タを提供する点にある
本発明のプリンタは、磁気インクを使用したプ
リンタにおいて、磁気インクを磁力で吸引保持す
る磁性体と、磁性体と間隔を隔てて設置された被
記録体と、磁気インクに前記被記録体方向に飛翔
する力をバイアス印加するバイアス手段とを備
え、磁性体を加熱して磁性体の透磁率を変化させ
磁気インクの磁性体に対する吸引保持力を減少さ
せる加熱手段とを備えたことを特徴とする。 An object of the present invention is to solve the above problems and provide a printer using magnetic ink that enables high-density, high-resolution recording without requiring a complicated structure or high voltage application. In a printer using magnetic ink, a magnetic body that attracts and holds the magnetic ink with magnetic force, a recording object placed at a distance from the magnetic body, and a bias force applied to the magnetic ink to fly toward the recording body. The present invention is characterized by comprising a bias means for applying a bias, and a heating means for heating the magnetic material to change the magnetic permeability of the magnetic material to reduce the attraction and retention force of the magnetic ink to the magnetic material.
本発明による熱磁気スイツチプリンタの装置の
模式図を第１図に示す。図中、１０１は対向電
極、１０２は磁性スタイラスで、対向電極、磁性
スタイラス間には直流電圧がバイアスとして印加
されれている。１０３は発熱体、１０４は永久磁
石、１０５は磁気インク、１０６は記録紙で、発
熱体は画信号に応じてスタイラスをキユーリー温
度付近まで加熱する。磁気インクはスタイラスが
加熱されると、対向電極方向に飛翔し、スライラ
スと間隔を隔てて設置された記録紙上にドツト形
成する。 A schematic diagram of a thermomagnetic switch printer apparatus according to the present invention is shown in FIG. In the figure, 101 is a counter electrode, 102 is a magnetic stylus, and a DC voltage is applied as a bias between the counter electrode and the magnetic stylus. 103 is a heating element, 104 is a permanent magnet, 105 is magnetic ink, and 106 is a recording paper. The heating element heats the stylus to around the Curie temperature in accordance with the image signal. When the stylus is heated, the magnetic ink flies toward the counter electrode and forms a dot on a recording paper placed at a distance from the stylus.
次にインク飛翔のメカニズムを第１図における
磁気インクに作用する各種の力を基に説明する。
第２図はその力を示したものである。図中、Fc
は対向電極方向に働く静電引力、Fmは磁石方向
に働く磁気力、Fsはスタイラスへの付着力（主
に表面張力）であり、Fc、Fmは次式で表わされ
る。 Next, the mechanism of ink flying will be explained based on various forces acting on the magnetic ink in FIG. 1.
Figure 2 shows this force. In the figure, Fc
is the electrostatic attraction force acting in the direction of the opposing electrode, Fm is the magnetic force acting in the direction of the magnet, Fs is the adhesion force (mainly surface tension) to the stylus, and Fc and Fm are expressed by the following equation.
Fc＝q.E
Fm＝ｖ・ｍ・dH／dl
（式中、ｑは磁気インク滴の電荷、Ｅは電界強
度、Ｖは該インク滴の体積、ｍは磁化の強さ、
dH／dlは磁場勾配を表わす）
非加熱時にはFc＜Fm＋Fsであり、スタイラス
に付着しているが、加熱時には前式中、ｍ・
dH／dlが減少し、Fc＞Fm＋Fsとなりインクは
電界方向にひかれ飛翔する。飛翔の原理は以上述
べた通りであるが、以下に実施例を掲げて詳しく
説明する。 Fc=qE Fm=v・m・dH/dl (where q is the charge of the magnetic ink droplet, E is the electric field strength, V is the volume of the ink droplet, m is the strength of magnetization,
(dH/dl represents the magnetic field gradient) When not heated, Fc<Fm+Fs, and it is attached to the stylus, but when heated, m・
dH/dl decreases, Fc > Fm + Fs, and the ink is drawn in the direction of the electric field and flies. The principle of flight is as described above, and will be explained in detail below using examples.
実施例
磁気インクのベースに用いた磁気流体、の磁気
特性を第３図に示す。図において構軸は磁場の強
さ、縦軸は磁性流体の磁化の強さを示す。磁性流
体は、ケロシン等の有機溶倍中に、フエライト粒
子がコロイド状に分散しており、各粒子が短磁区
構造をしており、また粒子表面がオレイン酸等の
表面活性剤で覆われているため、磁場をかけても
凝集・沈降が起こらず、また第３図に示す如く、
磁気ヒステリシスをもたず、超常磁性を示す。磁
気インクは、この磁性流体をベースに染料・防カ
ビ剤、湿潤剤等を添加調合してつくる。EXAMPLE FIG. 3 shows the magnetic properties of the magnetic fluid used as the base of the magnetic ink. In the figure, the axis shows the strength of the magnetic field, and the vertical axis shows the strength of magnetization of the magnetic fluid. Magnetic fluid consists of ferrite particles colloidally dispersed in an organic solvent such as kerosene, each particle having a short magnetic domain structure, and the particle surface covered with a surfactant such as oleic acid. Therefore, even if a magnetic field is applied, no aggregation or sedimentation occurs, and as shown in Figure 3,
It has no magnetic hysteresis and exhibits superparamagnetism. Magnetic ink is made by adding dyes, antifungal agents, wetting agents, etc. to this magnetic fluid as a base.
第４図に、磁気スタライス材料の飽和磁化の温
度依存性を示す。この磁性材料は例えばMn−Zn
系のフエライトで、金属組成を変えることで、キ
ユーリー温度を室温付近で、適当な値に調整する
ことができる。 FIG. 4 shows the temperature dependence of the saturation magnetization of the magnetic starice material. This magnetic material is, for example, Mn-Zn
By changing the metal composition of this type of ferrite, the Curie temperature can be adjusted to an appropriate value around room temperature.
第５図にスタイラスヘツド部の構造を示す。図
中、２０１は発熱体、２０２は磁性フエライト、
２０３は電極、２０４は磁気インクである。 FIG. 5 shows the structure of the stylus head. In the figure, 201 is a heating element, 202 is a magnetic ferrite,
203 is an electrode, and 204 is magnetic ink.
磁性スタイラスに、キユーリー温度60℃のMn
−Zn系フエライトを用い、スタイラスー対向電
極間350μｍに設定し、直流電圧1Kvを印加し、印
加電力20W／mm2の発熱体で室温−60℃の温度スイ
ツチを行なつたところ、くり返し周波数1KHzに
て、磁気インクの飛翔が確認された。 Mn with a Curie temperature of 60°C for the magnetic stylus
- Using Zn-based ferrite, setting the distance between the stylus and the opposing electrodes to 350 μm, applying a DC voltage of 1 Kv, and performing a temperature switch from room temperature to -60°C using a heating element with an applied power of 20 W/mm 2 , the repetition frequency decreased to 1 KHz. The flying of magnetic ink was confirmed.
なお、上記の実施例は磁気インクと永久磁石と
の間に介在する磁気インクを保持した磁性スタイ
ラスと一体化した発熱体により、スタイラスをキ
ユーリー温度付近まで加熱し、磁気インクに働く
磁気力を減少させ、バイアスとして印加されてい
る静電引力によりインクを飛翔させるものであ
る。 In addition, in the above embodiment, a heating element integrated with a magnetic stylus holding magnetic ink interposed between the magnetic ink and a permanent magnet heats the stylus to around the Curie temperature, thereby reducing the magnetic force acting on the magnetic ink. The ink is caused to fly due to the electrostatic attraction applied as a bias.
以上述べた本発明の磁気インクプリンタによれ
ば、記録信号に対応して磁気インクを保持する磁
性体に熱を印加すればよく、高圧印加が不用であ
り、かつ印刷ヘツドの構造を簡単にできる。ま
た、磁気インクを飛翔させるものであるため、極
めて高密度、高解像度の印刷を行なうことができ
る。 According to the above-described magnetic ink printer of the present invention, it is only necessary to apply heat to the magnetic material that holds the magnetic ink in response to the recording signal, and high voltage application is unnecessary, and the structure of the printing head can be simplified. . Furthermore, since magnetic ink is ejected, extremely high density and high resolution printing can be performed.
第１図は本発明の磁気インクプリンタの構成を
示す図。第２図は本発明の磁気インクプリンタの
磁気インクに働く各種力を示した図。第３図は本
発明の磁気インクプリンタに使用する磁性流体の
磁化特性を示す図。第４図は本発明の磁気インク
プリンタに使用する磁化フエライトの飽和磁化の
温度依存性を示した図。第５図は本発明の磁気イ
ンクプリンタに用いるスタイラスヘツドの構造を
示す図。
１０１……対向電極、１０２……磁性スタイラ
ス、１０３……発熱体、１０４……永久磁石、１
０５……磁気インク、１０６……記録紙、２０１
……発熱体、２０２……磁性フエライト、２０３
…電極、２０４……磁気インク、Fc……静電引
力、Fm……磁気力、Fs……スタイラス付着力。
FIG. 1 is a diagram showing the configuration of a magnetic ink printer of the present invention. FIG. 2 is a diagram showing various forces acting on the magnetic ink of the magnetic ink printer of the present invention. FIG. 3 is a diagram showing the magnetization characteristics of the magnetic fluid used in the magnetic ink printer of the present invention. FIG. 4 is a diagram showing the temperature dependence of saturation magnetization of magnetized ferrite used in the magnetic ink printer of the present invention. FIG. 5 is a diagram showing the structure of a stylus head used in the magnetic ink printer of the present invention. 101... Counter electrode, 102... Magnetic stylus, 103... Heating element, 104... Permanent magnet, 1
05...Magnetic ink, 106...Recording paper, 201
... Heating element, 202 ... Magnetic ferrite, 203
...electrode, 204...magnetic ink, Fc...electrostatic attraction, Fm...magnetic force, Fs...stylus adhesion force.
Claims (1)
と、前記磁性体と間隔を隔てて設置された被記録
体と、前記磁気インクに前記被記録体方向に飛翔
する力をバイアス印加するバイアス手段とを備
え、前記磁性体を加熱して前記磁性体の透磁率を
変化させ前記磁気インクの前記磁性体に対する吸
引保持力を減少させる加熱手段とを備えたことを
特徴とする磁気インクプリンタ。[Scope of Claims] 1. A printer using magnetic ink, comprising: a magnetic body that magnetically attracts and holds the magnetic ink; a recording body placed at a distance from the magnetic body; bias means for applying a bias force to cause the magnetic ink to fly in the direction of the recording medium; heating means for heating the magnetic body to change the magnetic permeability of the magnetic body to reduce the attraction and retention force of the magnetic ink to the magnetic body; A magnetic ink printer characterized by being equipped with.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21097682A JPS59101371A (en) | 1982-12-01 | 1982-12-01 | Thermomagnetic switch printer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21097682A JPS59101371A (en) | 1982-12-01 | 1982-12-01 | Thermomagnetic switch printer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59101371A JPS59101371A (en) | 1984-06-11 |
| JPH0450189B2 true JPH0450189B2 (en) | 1992-08-13 |
Family
ID=16598239
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21097682A Granted JPS59101371A (en) | 1982-12-01 | 1982-12-01 | Thermomagnetic switch printer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59101371A (en) |
-
1982
- 1982-12-01 JP JP21097682A patent/JPS59101371A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59101371A (en) | 1984-06-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4315267A (en) | Method of magnetofluidic recording | |
| Maruno et al. | Plain paper recording process using magnetic fluids magneto-fluid-graphy | |
| JPS5919819B2 (en) | Image recording method | |
| JPH0450189B2 (en) | ||
| CA1092638A (en) | Direct current bias fields for magnetic printing | |
| JPH0450190B2 (en) | ||
| JPH055663B2 (en) | ||
| US4359752A (en) | Magneto-fluidic recording apparatus | |
| JPS59103763A (en) | Magnetic switch printer | |
| JPS5644669A (en) | Ink-jet recorder | |
| JPS6212028B2 (en) | ||
| Meiklejohn | A review of magnetic printing | |
| Epstein | The electrographic recording technique | |
| JPS6054874B2 (en) | image recording device | |
| JPS5839068B2 (en) | Recording method | |
| KR830000929B1 (en) | Magnetic fluid recording method | |
| JPS6321621B2 (en) | ||
| JPS5835870B2 (en) | Image recording method | |
| JPS6217544B2 (en) | ||
| JPS63283966A (en) | Transferring method | |
| JPS6313767A (en) | Printing method | |
| JPS61252166A (en) | Ordinary paper recorder | |
| JPH01113265A (en) | Thermal transfer printer | |
| JPH02293164A (en) | Printer | |
| JPS60187568A (en) | Thermal transfer recording apparatus |