JPS6032585B2 - Magnetofluid recording device - Google Patents
Magnetofluid recording deviceInfo
- Publication number
- JPS6032585B2 JPS6032585B2 JP55130949A JP13094980A JPS6032585B2 JP S6032585 B2 JPS6032585 B2 JP S6032585B2 JP 55130949 A JP55130949 A JP 55130949A JP 13094980 A JP13094980 A JP 13094980A JP S6032585 B2 JPS6032585 B2 JP S6032585B2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- metal needle
- tip
- magnetic metal
- magnetic fluid
- 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
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
- Duplication Or Marking (AREA)
- Particle Formation And Scattering Control In Inkjet Printers (AREA)
- Electrophotography Using Other Than Carlson'S Method (AREA)
Description
【発明の詳細な説明】
本発明は、単一または複数の磁性金属針上に磁力によっ
て磁性流動体トナーを保持，隆起せしめ、隆起せしめら
れた磁性流動体トナーにクーロン力を働かせて磁性流動
体トナ−を飛翻させ、記録面上に画像を得る磁性流動体
記録装置に関するもので、磁性金属針の先端近傍部の磁
力を増加させ、やや強い磁場を形成することにより、磁
性金属針の先端への磁性流動体トナーの供給を良くし、
高解像度，高品質の記録画像および高速記録が得られる
磁性流動体記録装置を提供しようとするものである。DETAILED DESCRIPTION OF THE INVENTION The present invention holds and bulges magnetic fluid toner on a single or plural magnetic metal needles by magnetic force, and applies a Coulomb force to the raised magnetic fluid toner to form a magnetic fluid. This relates to a magnetic fluid recording device that scatters toner and obtains an image on the recording surface.It increases the magnetic force near the tip of the magnetic metal needle and creates a somewhat strong magnetic field. Improves the supply of magnetic fluid toner to
The present invention aims to provide a magnetic fluid recording device that can obtain high-resolution, high-quality recorded images and high-speed recording.
従来の磁性流動体記録装置の磁性金属針は、高解像度，
高品質の記録画像を得るために、寸法精度が良く、製作
が容易な引抜き加工により得た細い磁性線材を使用し、
その磁性線村を一定寸法に切断したその形状で、単一、
または列状に複数本並べて使用していた。The magnetic metal needle of conventional magnetorheological recording devices is capable of high resolution,
In order to obtain high-quality recorded images, we use thin magnetic wire obtained through drawing processing, which has good dimensional accuracy and is easy to manufacture.
The shape of the magnetic wire village cut into a certain size allows for a single,
Or, multiple pieces were used in rows.
第１図，第２図は、従来の装置を示す要部の正面図，側
面図である。1 and 2 are a front view and a side view of main parts of a conventional device.
第１図は正面から見た磁性流動体トナーの保持状態を示
し、第２図は、側面から見た磁力線の出方および磁性流
動体トナーの保持状態を示す。１は磁性金属針で、基板
２の上に等間隔に複数本並べて設けられている。FIG. 1 shows how the magnetic fluid toner is held when viewed from the front, and FIG. 2 shows how the lines of magnetic force emerge and how the magnetic fluid toner is held when viewed from the side. A plurality of magnetic metal needles 1 are arranged on the substrate 2 at equal intervals.
磁性金属針１上には、磁性金属針１を磁化するための隆
起用磁石３が磁性金属針先端ｌａより後方に距離Ａ離れ
て接着されている。ここで磁性金属針１を形成する粒子
の並びは、引抜き加工により得た磁性線材を使用してい
るために引抜き方向（Ｂ方向）いわゆる軸方向（以下、
鞠方向Ｂと記する）に配列された状態に形成されており
、そのために磁性金属針１を磁化すると麹方向Ｂに強く
磁化される傾向がある。また磁性材料を磁化すると、磁
性材料の角部は、滑らかな面より強い磁力が発生する現
象がある。そのために、隆起用磁石３により磁性金属針
１が磁化されると、第２図の磁力線（矢印線）Ｃで示す
ように、磁性金属針先端ｌａは、強い磁力が発生し強い
磁場が形成された。しかし、磁性金属針先端近傍部ｌｂ
は、鯛方向Ｂに強く磁化されているために磁性金属針１
の外周面からの漏れ磁力が少なく、また磁性金属針１の
外周面が潜めらかな面であるために強い磁力を生じる箇
所がなく、弱い磁場しか形成されなかった。このように
磁化された磁性金属針１および隆起用磁石３の上に、外
部より、磁性流動体トナ−を供給（図示せず）すると、
第１図，第２図に示すように磁場の強さに対応して磁性
流動体トナー４が配され、磁性金属針先端ｌａおよび隆
起用磁石３上には多量に、磁性金属針先端近傍部ｌｂ上
には少量の磁性流動体トナー４が保持されている。また
、磁性金属針先端部ｌａが保持する磁性流動体トナー４
は、磁性金属針先端ｌａを覆うように隆起５が形成され
る。隆起５形状の先端半径Ｒの大きさは、磁性金属針先
端ｌａの磁場が強いほど大きく、また外部より供給され
る磁性流動体トナ−の供給量が多いほど大きくなる。６
は制御電極で、磁性金属針１と対向し、かつ離間して設
けられている。A protruding magnet 3 for magnetizing the magnetic metal needle 1 is adhered onto the magnetic metal needle 1 at a distance A rearward from the tip la of the magnetic metal needle. Here, the arrangement of particles forming the magnetic metal needle 1 is in the drawing direction (direction B), so-called axial direction (hereinafter referred to as
Therefore, when the magnetic metal needle 1 is magnetized, it tends to be strongly magnetized in the direction B. Furthermore, when a magnetic material is magnetized, there is a phenomenon in which a stronger magnetic force is generated at the corners of the magnetic material than on a smooth surface. Therefore, when the magnetic metal needle 1 is magnetized by the bump magnet 3, a strong magnetic force is generated at the tip la of the magnetic metal needle, and a strong magnetic field is formed, as shown by the lines of magnetic force (arrow line) C in FIG. Ta. However, the part near the tip of the magnetic metal needle lb
is strongly magnetized in the sea bream direction B, so the magnetic metal needle 1
There was little leakage magnetic force from the outer peripheral surface of the magnetic metal needle 1, and since the outer peripheral surface of the magnetic metal needle 1 was a smooth surface, there were no places where strong magnetic force was generated, and only a weak magnetic field was formed. When magnetic fluid toner is externally supplied (not shown) onto the magnetic metal needle 1 and the bump magnet 3 that have been magnetized in this way,
As shown in FIGS. 1 and 2, magnetic fluid toner 4 is arranged in accordance with the strength of the magnetic field, and a large amount is distributed on the magnetic metal needle tip la and the bump magnet 3 near the magnetic metal needle tip. A small amount of magnetic fluid toner 4 is held on the lb. Further, the magnetic fluid toner 4 held by the magnetic metal needle tip portion la
In this case, a protuberance 5 is formed to cover the tip la of the magnetic metal needle. The radius R of the tip of the protuberance 5 increases as the magnetic field at the tip la of the magnetic metal needle becomes stronger, and as the amount of externally supplied magnetic fluid toner increases. 6
is a control electrode, which is provided facing and spaced apart from the magnetic metal needle 1.
７は、記録紙で、磁性金属針１と対向する記録紙７面の
鱗面は、制御電極６に当接されている。Reference numeral 7 denotes a recording paper, and the scale surface of the recording paper 7 facing the magnetic metal needle 1 is in contact with the control electrode 6 .
８は、磁性流動体トナー４を記録体７上に飛翻させるた
めの制御回路である。8 is a control circuit for causing the magnetic fluid toner 4 to fly onto the recording medium 7.
この構成で磁性金属針１と制御電極６との間に制御回路
８によって電圧を印加すると、隆起５の先端にクーロン
力が働き、磁性流動体トナー４は、記録体７に向って飛
翻し、記録体７上に印字が得られる。When a voltage is applied by the control circuit 8 between the magnetic metal needle 1 and the control electrode 6 in this configuration, a Coulomb force acts on the tip of the protuberance 5, and the magnetic fluid toner 4 flies toward the recording medium 7. , a print is obtained on the recording medium 7.
磁性流動体トナーを飛翻させるに必要な印加電圧は、隆
起５の先端半径Ｒが小さいほど低電圧となる。また、飛
轍する磁性流動体トナー４ａ量は、隆起５の先端半径Ｒ
が大きいほど多く、飛翻する磁性流動体トナー４ａ量が
多いほど印字濃度の濃い記録画像が得られる。記録体７
に向って磁性流動体トナー４ａが飛翻すると、磁性金属
針先端ｌａに保持されている磁性流動体トナー４量は減
少し、隆起５の先端半径Ｒは小さくなるが、磁力によっ
て隆起用磁石３上に磁性流動体トナー４が磁性金属針先
端近傍部ｌｂを伝わって供給される。しかし、前従のよ
うに従来の構成では磁性金属針先端近傍部ｌｂの磁場は
、外周面からの漏れ磁力が少ないために弱く、そのため
に磁性金属針先端近傍部ｌｂを伝わって流動する磁性流
動体トナー４の流れが遅く、また磁性金属針先端近傍部
ｌｂが保持する磁性流動体トナ−４量が少なく、磁性金
属針先端Ｉａへの磁性流動体トナ−４の供給能力が低か
った。磁性流動体を用いる記録では、常に均一な印字濃
度の記録画像を得るために、飛糊する磁性流動体トナー
４ａ量を常時一定にする必要があり、そのためには飛糊
時の隆起５の先端半径Ｒが一定であることが必要である
。したがって、常に飛鋼開始時に磁性金属針先端ｌａが
保持する磁性流動体トナー４量が一定量に達していると
、常に均一な印字濃度の記録画像が得られる。しかし、
この従来の構成では、磁性金属針先端近傍部ｌｂにおい
て磁性金属針先端ｌａへの磁性流動体トナー４の供繋合
能力が低かったために、均一な印字濃度を得ようとする
と高速で記録することができなかった。すなわち高速記
録を行うと、記録するに従って印字濃度が薄くなり、記
録画像のかすれが発生していた。また、情報の密度の差
によって、飛糊開始時における磁性金属針先端ｌａが保
持する磁性流動体トナー４量が変化するために、飛籾す
る磁性流動体トナ−４ａ量が不均一となり、記録画像に
印字濃度むらが生じるという欠点もあった。これに対し
て磁性金属針先端近傍部ｌｂにおける供給能力を上げる
ために、隆起用磁石３を磁性金属針先端ｌａに近づけて
設け、磁性金属針先端近傍部ｌｂを伝って磁性流動体ト
ナー４が流動すると距離を短くすることにより供給能力
の向上を図ると、磁性流動体トナーの供給性は改善され
たが、磁性金属針先端ｌａの磁場がより強くなり、磁性
金属針先端ｌａが保持する磁性流動体トナー４量が増加
したために飛翻される磁性流動体トナ−４ａ量が多量と
なり、記録画像の解像度が非常に悪くなった。本発明は
上記従来の欠点を解決するもので、磁性金属針の先端近
傍部の形状を変化させて磁力を増加させることを特徴と
するものである。以下本発明の一実施例を図面にもとづ
いて説明する。第３図〜第６図は、本発明の一実施例を
示す要部側面図であり、第７図は、本発明の一実施例に
おける磁力線の出方および磁性流動体トナーの保持状態
を示す。１１は、磁性金属針で、基板１２の上に設けら
れている。The applied voltage required to fly the magnetic fluid toner becomes lower as the tip radius R of the protuberance 5 becomes smaller. Furthermore, the amount of flying magnetic fluid toner 4a is determined by the tip radius R of the bump 5.
The larger the amount of magnetic fluid toner 4a, the larger the amount of flying magnetic fluid toner 4a, the higher the density of the recorded image. Recording body 7
When the magnetic fluid toner 4a flies toward The magnetic fluid toner 4 is supplied onto the magnetic metal needle through a portion lb near the tip thereof. However, in the conventional configuration, the magnetic field near the tip of the magnetic metal needle lb is weak because there is little leakage magnetic force from the outer circumferential surface, and as a result, the magnetic flux flowing through the tip of the magnetic metal needle lb is weak. The flow of the magnetic fluid toner 4 was slow, and the amount of magnetic fluid toner 4 held by the magnetic metal needle tip portion lb was small, so that the ability to supply the magnetic fluid toner 4 to the magnetic metal needle tip Ia was low. In recording using a magnetic fluid, it is necessary to keep the amount of the magnetic fluid toner 4a constant at all times in order to obtain a recorded image with uniform print density. It is necessary that the radius R be constant. Therefore, if the amount of magnetic fluid toner 4 held by the magnetic metal needle tip la always reaches a certain amount at the start of flying, a recorded image with uniform print density can always be obtained. but,
In this conventional configuration, the ability to supply the magnetic fluid toner 4 to the tip la of the magnetic metal needle in the vicinity of the tip lb of the magnetic metal needle was low, so that recording at high speed was required in order to obtain uniform print density. I couldn't do it. That is, when high-speed recording was performed, the print density became thinner as the recording progressed, causing blurring of the recorded image. Furthermore, due to the difference in information density, the amount of magnetic fluid toner 4 held by the magnetic metal needle tip la at the start of glue flying changes, so the amount of flying magnetic fluid toner 4a becomes uneven, and recording There was also the drawback that uneven print density occurred in the image. On the other hand, in order to increase the supply capacity in the area lb near the tip of the magnetic metal needle, the protruding magnet 3 is provided close to the tip la of the magnetic metal needle, and the magnetic fluid toner 4 is transmitted through the area lb near the tip of the magnetic metal needle. When the supply capacity of the magnetic fluid toner was improved by shortening the distance when it flows, the magnetic fluid toner supply performance was improved, but the magnetic field of the magnetic metal needle tip la became stronger, and the magnetism held by the magnetic metal needle tip la became stronger. Since the amount of fluid toner 4 increased, the amount of magnetic fluid toner 4a that was blown away became large, and the resolution of the recorded image became extremely poor. The present invention solves the above-mentioned conventional drawbacks, and is characterized by increasing the magnetic force by changing the shape of the vicinity of the tip of the magnetic metal needle. An embodiment of the present invention will be described below based on the drawings. 3 to 6 are side views of main parts showing one embodiment of the present invention, and FIG. 7 shows how magnetic lines of force emerge and the state of holding magnetic fluid toner in one embodiment of the present invention. . 11 is a magnetic metal needle provided on the substrate 12.
磁性金属針１ １上には、磁性金属針１１を磁化するた
めの隆起用磁石１３が磁性金属針先端１１ａより後方に
距離Ａ離れて接着されている。１１ｂは、磁性金属針先
端近傍部を示し、軸方向Ｂに直角な断面の形状または断
面積が部分的に、または連続的に軸方向別こ変化するよ
うに、磁性金属針先端近傍部１１ｂの外周面を凹凸状に
形成している。A protruding magnet 13 for magnetizing the magnetic metal needle 11 is adhered to the magnetic metal needle 11 at a distance A behind the magnetic metal needle tip 11a. 11b indicates a portion near the tip of the magnetic metal needle, and the portion 11b near the tip of the magnetic metal needle is designed such that the shape or cross-sectional area of the cross section perpendicular to the axial direction B changes partially or continuously in the axial direction. The outer peripheral surface is formed into an uneven shape.
第３図は磁性金属針先端近傍部１１ｂの外周面を凹凸状
に形成する一実施例を示すもので、少なくとも１個のり
ング状の溝２０を設けたものである。他の実施例として
、第４図に示すように少な〈とそ１個のＶ状または四角
状等のカット面２１を設ける。FIG. 3 shows an embodiment in which the outer circumferential surface of the magnetic metal needle tip vicinity portion 11b is formed into an uneven shape, in which at least one ring-shaped groove 20 is provided. As another embodiment, as shown in FIG. 4, a small number of V-shaped or square cut surfaces 21 are provided.
また、第５図に示すように外周面の一部分または全面を
サンドブラスト加工し、表面に凹凸面２２を設けてもよ
い。また、第６図に示すように外周面に磁性粉末を付着
することにより表面に凹凸面２３を設ける。以上の実施
例のように、磁性金属針先端近傍部ｌｂの外周面に凹凸
面を設けた磁性金属針１１上に隆起用磁石１３を設ける
と、第７図の磁力線（矢印線）Ｃで示すように、凹凸面
に漏れ磁力が発生し、磁性金属針先端近傍部１１ｂには
従来よりも強い磁場が形成されている。Further, as shown in FIG. 5, a part or the entire outer circumferential surface may be sandblasted to provide an uneven surface 22 on the surface. Further, as shown in FIG. 6, an uneven surface 23 is provided on the outer peripheral surface by adhering magnetic powder to the outer peripheral surface. As in the above embodiment, when the protruding magnet 13 is provided on the magnetic metal needle 11 having an uneven surface on the outer circumferential surface of the magnetic metal needle tip portion lb, the magnetic force lines (arrow lines) C in FIG. As such, leakage magnetic force is generated on the uneven surface, and a stronger magnetic field than before is formed in the vicinity of the tip of the magnetic metal needle 11b.
したがって、磁性金属針１１上に磁性流動体トナー１４
を配すると、第７図に示すように、磁性金属針先端近傍
１１ｂには、磁性流動体トナー１４がやや多く保持され
ている。このように、磁性金属針先端近傍１１ｂの磁場
が強いと、磁性金属針１１の後方より磁性金属針先端近
傍部１１ｂを伝わって流動する磁性流動体トナ−１４の
流れが遠く、また磁性金属針先端近傍部１１ｂが保持す
る磁性流動体トナー１４量が多いため、磁性金属針１１
ａへの磁性流動体トナー１４の供給能力が向上され、磁
性金属針先端１１ａより記録面に向かって磁性流動体ト
ナ−が飛翻し、磁性流動体トナー１４が減少しても、磁
性金属針先端１１ａに磁性流動体トナ−１４がすみやか
に補給される。したがって高解像度の記録が高速に行え
、画像の濃度も十分な濃さを保つことが可能である。以
上のように、本発明の磁性流動体記録装置は磁性金属針
先端近傍部に、軸方向に直角な断面の形状または断面積
が部分的にまたは連続的に藤方向に変化するよう磁性金
属針先端近傍の外周面を凹凸状に形成したことにより、
磁性金属針先端近傍部の磁場が強く形成され、磁性金属
針先端への磁性流動体トナーの供給能力が向上される。Therefore, the magnetic fluid toner 14 is placed on the magnetic metal needle 11.
As shown in FIG. 7, a slightly larger amount of magnetic fluid toner 14 is retained near the tip 11b of the magnetic metal needle. As described above, when the magnetic field near the tip 11b of the magnetic metal needle is strong, the flow of the magnetic fluid toner 14 flowing from the rear of the magnetic metal needle 11 through the portion 11b near the tip of the magnetic metal needle is far away; Since the amount of magnetic fluid toner 14 held by the tip vicinity portion 11b is large, the magnetic metal needle 11
The ability to supply the magnetic fluid toner 14 to a is improved, the magnetic fluid toner flies from the magnetic metal needle tip 11a toward the recording surface, and even if the magnetic fluid toner 14 decreases, the magnetic metal needle The magnetic fluid toner 14 is quickly replenished to the tip 11a. Therefore, high-resolution recording can be performed at high speed, and it is possible to maintain sufficient image density. As described above, the magnetic fluid recording device of the present invention has a magnetic metal needle in the vicinity of the tip of the magnetic metal needle so that the cross-sectional shape or cross-sectional area perpendicular to the axial direction changes partially or continuously in the wisteria direction. By forming the outer peripheral surface near the tip into an uneven shape,
A strong magnetic field is formed near the tip of the magnetic metal needle, and the ability to supply the magnetic fluid toner to the tip of the magnetic metal needle is improved.
したがって、高速記録等で消費量が多くても磁性金属針
先端が保持する磁性流動体トナー量を、常にほぼ一定量
に保つことができ、すなわち飛翻する磁性流動体トナー
量も常にほぼ一定量となり、高速記録を行っても情報密
度に関係なく、一定の濃度で記録が可能となり、品質の
良い記録画像が得られる優れた効果を有するものである
。Therefore, even if the consumption is large during high-speed recording, etc., the amount of magnetic fluid toner held by the magnetic metal needle tip can always be kept at an almost constant amount.In other words, the amount of flying magnetic fluid toner is always almost constant. Therefore, even if high-speed recording is performed, it is possible to record at a constant density regardless of the information density, and it has the excellent effect of obtaining a high-quality recorded image.
第１図は従来の磁性流動体記録装置を示す要部平面図、
第２図は同要部側面図ｈ第３図ないし第６図は、本発明
の一実施例を示す要部側面図、第７図は、本発明の一実
施例における磁力線および磁性流動体トナーの保持状態
を示す側面図である。
１１・・・・・・磁性金属針、ｉｌａ・・・・・・磁性
記録針先端、１１ｂ・・・・・・磁性金属針先端近傍部
、１３・・・・・・隆起用磁石、２０・…・・溝、２１
・・・・・・カット面、２２，２３……凹凸面。
第１図
第２図
第３図
第４図
第５図
第６図
第７図FIG. 1 is a plan view of the main parts of a conventional magnetic fluid recording device.
FIG. 2 is a side view of the main part; FIGS. 3 to 6 are side views of the main part showing an embodiment of the present invention; and FIG. 7 is a side view of the main part of the embodiment of the present invention. FIG. 3 is a side view showing a held state. 11...Magnetic metal needle, ila...Magnetic recording needle tip, 11b...Magnetic metal needle tip vicinity, 13...Elevation magnet, 20... ... Groove, 21
...Cut surface, 22, 23... Uneven surface. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7
Claims (1)
先端に磁性流動体トナーを隆起用させる隆起用磁石と、
前記磁性金属針の先端に隆起した磁性流動体トナーを画
信号に対応して記録面に飛翔または泳動させる制御手段
とを有し、前記磁性金属針の軸方向に対し直角な断面の
形状または断面積が軸方向に変化するごとく、前記磁性
金属針の先端近傍部の外周面を凹凸状に形成したことを
特徴とする磁性流動体記録装置。1. A single or plural magnetic metal needles, and a protrusion magnet for elevating magnetic fluid toner at the tip of the magnetic metal needles;
control means for causing the raised magnetic fluid toner to fly or migrate to the recording surface in response to an image signal at the tip of the magnetic metal needle; A magnetic fluid recording device characterized in that the outer circumferential surface of the magnetic metal needle near the tip is formed in an uneven shape so that the area changes in the axial direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55130949A JPS6032585B2 (en) | 1980-09-19 | 1980-09-19 | Magnetofluid recording device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55130949A JPS6032585B2 (en) | 1980-09-19 | 1980-09-19 | Magnetofluid recording device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5754958A JPS5754958A (en) | 1982-04-01 |
| JPS6032585B2 true JPS6032585B2 (en) | 1985-07-29 |
Family
ID=15046416
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP55130949A Expired JPS6032585B2 (en) | 1980-09-19 | 1980-09-19 | Magnetofluid recording device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6032585B2 (en) |
-
1980
- 1980-09-19 JP JP55130949A patent/JPS6032585B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5754958A (en) | 1982-04-01 |
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