JP3301133B2 - Method for manufacturing flat nonaqueous electrolyte battery - Google Patents
Method for manufacturing flat nonaqueous electrolyte batteryInfo
- Publication number
- JP3301133B2 JP3301133B2 JP34025892A JP34025892A JP3301133B2 JP 3301133 B2 JP3301133 B2 JP 3301133B2 JP 34025892 A JP34025892 A JP 34025892A JP 34025892 A JP34025892 A JP 34025892A JP 3301133 B2 JP3301133 B2 JP 3301133B2
- Authority
- JP
- Japan
- Prior art keywords
- mixture pellet
- electrolyte
- mixture
- electrolyte battery
- nonaqueous electrolyte
- 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 - Fee Related
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M6/00—Primary cells; Manufacture thereof
- H01M6/14—Cells with non-aqueous electrolyte
- H01M6/16—Cells with non-aqueous electrolyte with organic electrolyte
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Primary Cells (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、偏平形リチウム電池等
の偏平形非水電解液電池の製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a flat nonaqueous electrolyte battery such as a flat lithium battery.
【０００２】[0002]
【従来の技術】図３は従来の偏平形非水電解液電池の製
造方法の一例を示す工程図であり、（ａ）は合剤ペレッ
トを内缶上に載置した状態を示す断面図、（ｂ）は正極
缶をカールした状態を示す断面図である。2. Description of the Related Art FIG. 3 is a process diagram showing an example of a conventional method of manufacturing a flat nonaqueous electrolyte battery, and FIG. 3 (a) is a cross-sectional view showing a state where a mixture pellet is placed on an inner can. (B) is a sectional view showing a state where the positive electrode can is curled.
【０００３】従来、この種の偏平形非水電解液電池を製
造する際には、図３（ａ）に示すように、正極缶（１）
内に内缶（２）をスポット溶接し、内缶（２）よりもや
や小径の合剤ペレット（３）を挿入し、電解液（５）を
注液した後、図３（ｂ）に示すように、セパレータ
（６）とガスケット（１０）を嵌着した負極部（７）を
被せるようにして組み立てていた。Conventionally, when manufacturing a flat type nonaqueous electrolyte battery of this type, as shown in FIG.
After the inner can (2) is spot-welded into it, a mixture pellet (3) having a diameter slightly smaller than that of the inner can (2) is inserted, and an electrolyte (5) is injected, and then shown in FIG. 3 (b). In this manner, the separator (6) and the gasket (10) were assembled so as to cover the negative electrode portion (7) fitted thereto.
【０００４】[0004]
【発明が解決しようとする課題】偏平形非水電解液電池
の生産性を向上させるためには、電解液（５）を注液し
た後、直ちにセパレータ（６）と負極部（７）を被せる
ことが望ましい。しかしながら、電解液（５）は合剤ペ
レット（３）にすぐには吸液されず、一定のエージング
時間が必要となることから、注液直後にセパレータ
（６）と負極部（７）を被せて偏平形非水電解液電池を
組み立てた場合には、内缶（２）内に溜まる電解液
（５）が少なく、そのため組立後の電解液（５）の残存
量が不足し、その結果、偏平形非水電解液電池の性能が
低下してしまう。これを解消するために、合剤ペレット
（３）の形成密度を小さくして電解液（５）を合剤ペレ
ット（３）に素早く吸液させることも考えられるが、こ
の場合には合剤ペレット（３）の容量不足を余儀なくさ
れ、結局、偏平形非水電解液電池の性能が低下するとい
う欠点があった。或いは、吸液回数を２回、３回と増や
して電解液（５）の不足に対処することも可能である
が、それだと必然的に工数増となるため生産性の低下に
つながる不都合があった。つまり、偏平形非水電解液電
池の性能の向上と生産性の向上とを両立させることは困
難であった。In order to improve the productivity of a flat type non-aqueous electrolyte battery, immediately after the electrolyte (5) is injected, the separator (6) and the negative electrode (7) are covered. It is desirable. However, since the electrolyte (5) is not immediately absorbed by the mixture pellet (3) and a certain aging time is required, the separator (6) and the negative electrode (7) are covered immediately after the injection. When the flat type nonaqueous electrolyte battery is assembled by the method, the amount of the electrolyte (5) accumulated in the inner can (2) is small, so that the residual amount of the electrolyte (5) after the assembly is insufficient. The performance of the flat type non-aqueous electrolyte battery is reduced. In order to solve this problem, it is conceivable to reduce the formation density of the mixture pellets (3) so that the electrolyte solution (5) is quickly absorbed into the mixture pellets (3). There is a disadvantage that the capacity of (3) is insufficient and the performance of the flat type nonaqueous electrolyte battery is eventually reduced. Alternatively, it is possible to cope with the shortage of the electrolyte solution (5) by increasing the number of times of liquid absorption to two or three times, but this would inevitably increase the number of steps and lead to a decrease in productivity. there were. That is, it has been difficult to achieve both improvement in the performance of the flat nonaqueous electrolyte battery and improvement in the productivity.
【０００５】本発明は、上記事情に鑑み、高性能で、か
つ安定した性能を示す偏平形非水電解液電池をその生産
性を低下させることなく製造することが出来る偏平形非
水電解液電池の製造方法を提供することを目的とする。SUMMARY OF THE INVENTION In view of the above circumstances, the present invention provides a flat type non-aqueous electrolyte battery capable of producing a flat type non-aqueous electrolyte battery exhibiting high performance and stable performance without lowering the productivity. It is an object of the present invention to provide a method for producing the same.
【０００６】[0006]
【課題を解決するための手段】即ち、本発明による偏平
形非水電解液電池の製造方法は、円環状の本体（２ａ）
に３個以上の凸部（２ｂ、２ｃ）を円周上にそれぞれ該
本体（２ａ）の内側に向けて突設した内缶（２）を正極
缶（１）内に溶接し、次いで、前記内缶（２）上に円盤
状の合剤ペレット（３）を当該内缶（２）の前記凸部に
引っ掛けて保持し、この状態で、前記合剤ペレット
（３）と前記内缶（２）の前記本体（２ａ）の底部との
間に形成された電解液貯溜空間（９）に電解液（５）を
その液面が前記合剤ペレット（３）の下端面を越えるま
で注液し、その後、直ちに前記合剤ペレット（３）上に
セパレータ（６）とガスケット（１０）を嵌着した負極
部（７）を被せて、当該合剤ペレット（３）が前記内缶
（２）の前記本体（２ａ）の底部に達するまで、前記電
解液（５）が当該合剤ペレット（３）に吸液するよう徐
々に押し下げ、その後、前記正極缶（１）をカールする
ようにして構成される。That is, a method of manufacturing a flat nonaqueous electrolyte battery according to the present invention comprises an annular main body (2a).
An inner can (2) having three or more convex portions (2b, 2c) projecting toward the inside of the main body (2a) on the circumference is welded into a positive electrode can (1). On the inner can (2), a disk-shaped mixture pellet (3) is hooked and held by the convex portion of the inner can (2). In this state, the mixture pellet (3) and the inner can (2) are held. ), The electrolyte (5) is injected into the electrolyte storage space (9) formed between the bottom of the main body (2a) and the electrolyte surface (5) until the liquid level exceeds the lower end surface of the mixture pellet (3). Then, immediately thereafter, the negative electrode portion (7) in which the separator (6) and the gasket (10) are fitted is put on the mixture pellet (3), and the mixture pellet (3) is placed on the inner can (2). Until reaching the bottom of the main body (2a), the electrolytic solution (5) is gradually pushed down so as to absorb the mixture pellet (3). Configured so as to curl the positive electrode can (1).
【０００７】なお、括弧内の番号等は、図面における対
応する要素を表わす便宜的なものであり、従って、本発
明は図面上の記載に限定拘束されるものではない。この
ことは、「特許請求の範囲」及び「作用」の欄について
も同様である。[0007] The numbers in parentheses are for convenience showing the corresponding elements in the drawings, and the present invention is not limited to the description on the drawings. The same applies to the fields of “Claims” and “Action”.
【０００８】[0008]
【作用】上記した構成により、本発明は、電解液（５）
を注液した直後に合剤ペレット（３）上にセパレータ
（６）と負極部（７）を被せて徐々に押し下げることに
より、正極缶（１）内に貯溜された電解液の大部分が合
剤ペレット（３）とセパレータ（６）に吸収され、カー
ル後も電池内に残存するように作用する。According to the above construction, the present invention provides an electrolytic solution (5)
Immediately after pouring the mixture, the separator (6) and the negative electrode portion (7) are put on the mixture pellet (3) and gradually pressed down, so that most of the electrolyte solution stored in the positive electrode can (1) is mixed. It is absorbed by the agent pellet (3) and the separator (6) and acts so as to remain in the battery even after curling.
【０００９】[0009]
【実施例】以下、本発明の実施例を図面に基づいて説明
する。Embodiments of the present invention will be described below with reference to the drawings.
【００１０】図１は本発明による偏平形非水電解液電池
の製造方法の一実施例を示す工程図であり、（ａ）は合
剤ペレットを内缶上に載置した状態を示す断面図、
（ｂ）は正極缶をカールした状態を示す断面図、図２は
本発明による偏平形非水電解液電池の製造方法において
用いる内缶の別の例を示す断面図である。FIG. 1 is a process diagram showing one embodiment of a method of manufacturing a flat type nonaqueous electrolyte battery according to the present invention. FIG. 1 (a) is a cross-sectional view showing a state where a mixture pellet is placed on an inner can. ,
(B) is a cross-sectional view showing a state in which the positive electrode can is curled, and FIG. 2 is a cross-sectional view showing another example of the inner can used in the method of manufacturing a flat nonaqueous electrolyte battery according to the present invention.
【００１１】本発明による偏平形非水電解液電池の製造
方法を実施する際には、図１に示すように、まず正極缶
（１）内に内缶（２）をスポット溶接するが、この内缶
（２）は、円環状の本体（２ａ）に４個の切り欠き（２
ｂ）がそれぞれその先端を該本体（２ａ）の内側に向け
た形で円周上に等角度間隔（即ち、９０°間隔）で形成
されたものである。In carrying out the method for manufacturing a flat nonaqueous electrolyte battery according to the present invention, as shown in FIG. 1, first, an inner can (2) is spot-welded in a positive electrode can (1). The inner can (2) has four notches (2) in an annular main body (2a).
b) are formed at equal angular intervals (ie, 90 ° intervals) on the circumference with their tips facing the inside of the main body (2a).
【００１２】次に、内缶（２）よりもやや小径の円盤状
に形成した合剤ペレット（３）を内缶（２）上に載置す
る。すると、合剤ペレット（３）は内缶（２）の４個の
切り欠き（２ｂ）に引っ掛かる形で中空に保持され、該
合剤ペレット（３）と内缶（２）の本体（２ａ）の底部
との間には、円筒状の電解液貯溜空間（９）が形成され
る。Next, a mixture pellet (3) formed in a disk shape slightly smaller in diameter than the inner can (2) is placed on the inner can (2). Then, the mixture pellet (3) is held in a hollow state by being hooked on the four notches (2b) of the inner can (2), and the mixture pellet (3) and the main body (2a) of the inner can (2) are held. A cylindrical electrolyte storage space (9) is formed between the bottom and the bottom.
【００１３】次いで、合剤ペレット（３）の上方から電
解液（５）を注液する。すると、電解液貯溜空間（９）
及び内缶（２）と正極缶（１）との間の空間に電解液
（５）が溜まっていく。電解液（５）の液面が合剤ペレ
ット（３）の下端面を越えたところで、注液を中止す
る。その後、直ちに合剤ペレット（３）上にセパレータ
（６）と予め金属リチウムを貼付した負極部（７）の外
周にガスケット（１０）を嵌着して、前記電解液（５）
の合剤ペレット（３）への吸収と合わせ負極部（７）を
徐々に押し下げる。すると、合剤ペレット（３）は電解
液（５）を充分含んだ状態で内缶（２）の本体（２ａ）
の底部に達するまで下がる。Next, an electrolyte (5) is injected from above the mixture pellet (3). Then, the electrolyte storage space (9)
And the electrolyte (5) accumulates in the space between the inner can (2) and the positive electrode can (1). When the liquid level of the electrolyte (5) exceeds the lower end face of the mixture pellet (3), the injection is stopped. Thereafter, a gasket (10) was immediately fitted to the outer periphery of the negative electrode portion (7) on which the separator (6) and metal lithium were previously adhered on the mixture pellet (3), and the electrolytic solution (5)
The negative electrode part (7) is gradually pushed down in accordance with the absorption of the mixture into the mixture pellet (3). Then, the mixture pellet (3) contains the electrolyte (5) sufficiently and the main body (2a) of the inner can (2).
Go down until you reach the bottom.
【００１４】その後、正極缶（１）をカールする。この
際、貯溜されていた電解液（５）はカール後も大部分が
電池内に残存するので、電解液（５）の不足に起因する
性能低下は生じない。Thereafter, the positive electrode can (1) is curled. At this time, most of the stored electrolytic solution (5) remains in the battery even after curling, so that performance deterioration due to lack of the electrolytic solution (5) does not occur.
【００１５】上述の効果を確認するため、本発明による
偏平形非水電解液電池の製造方法を適用して外径２４．
３mm、高さ５．０mmの偏平形リチウム電池ＣＲ２４５０
を製造し、温度２０℃で２．７ kΩ連続の放電性能試験
を実施した。従来品についても同様に放電性能試験を実
施した。その結果、閉路電圧が急激に衰え始めるまでの
持続時間が、従来品では約３００時間であったのに対し
て、本発明品では約４００時間と長くなり、放電性能に
優れていることが確認できた。また、放電性能のバラツ
キについても、本発明品は従来品と比べてバラツキが小
さく安定性が高かった。In order to confirm the above-mentioned effects, an outer diameter of 24.degree.
3mm, height 5.0mm flat type lithium battery CR2450
Was manufactured, and a continuous discharge performance test of 2.7 kΩ was conducted at a temperature of 20 ° C. The discharge performance test was similarly performed for the conventional product. As a result, the duration until the closed circuit voltage began to rapidly decline was about 300 hours in the conventional product, but was increased to about 400 hours in the product of the present invention, confirming that the discharge performance was excellent. did it. In addition, with respect to the variation in the discharge performance, the product of the present invention showed a small variation as compared with the conventional product, and the stability was high.
【００１６】なお、上述の実施例においては、４個の切
り欠き（２ｂ）が設けられた内缶（２）を用いた場合に
ついて説明したが、切り欠き（２ｂ）の個数は３個以上
であれば４個に限らず何個でもよい。また、図２に示す
ように、合剤ペレット（３）を一時的に中空で保持する
ことが出来る限り、切り欠き（２ｂ）の代わりに突起
（２ｃ）を設けても構わない。突起（２ｃ）を設ける場
合は内缶（２）の底部は必ずしも透孔としなくてよい。In the above embodiment, the case where the inner can (2) provided with four notches (2b) is used has been described, but the number of the notches (2b) is three or more. If so, the number is not limited to four and may be any number. Further, as shown in FIG. 2, a projection (2c) may be provided instead of the notch (2b) as long as the mixture pellet (3) can be temporarily held in a hollow state. When the projection (2c) is provided, the bottom of the inner can (2) does not necessarily have to be a through hole.
【００１７】また、ガスケット（１０）の嵌着順序は必
ずしも負極部（７）に嵌着せず、正極缶（１）に内缶
（２）を溶接した後、正極缶（１）の内周に嵌着し、合
剤ペレット（３）を所定位置に装着してもよい。The order of fitting the gasket (10) is not always to the negative electrode (7), but after the inner can (2) is welded to the positive can (1), the inner circumference of the positive can (1) is The mixture pellets (3) may be fitted in place.
【００１８】[0018]
【発明の効果】以上説明したように、本発明によれば、
円環状の本体（２ａ）に３個以上の切り欠き（２ｂ）、
突起（２ｃ）等の凸部を円周上にそれぞれ該本体（２
ａ）の内側に向けて突設した内缶（２）を正極缶（１）
内に溶接し、次いで、前記内缶（２）上に円盤状の合剤
ペレット（３）を当該内缶（２）の前記凸部に引っ掛け
て保持し、この状態で、前記合剤ペレット（３）と前記
内缶（２）の前記本体（２ａ）の底部との間に形成され
た電解液貯溜空間（９）に電解液（５）をその液面が前
記合剤ペレット（３）の下端面を越えるまで注液し、そ
の後、直ちに前記合剤ペレット（３）上にセパレータ
（６）とガスケット（１０）を嵌着した負極部（７）を
被せて、当該合剤ペレット（３）が前記内缶（２）の前
記本体（２ａ）の底部に達するまで、前記電解液（５）
が当該合剤ペレット（３）に吸液するよう徐々に押し下
げ、その後、前記正極缶（１）をカールするようにして
構成したので、電解液（５）を注液した直後に合剤ペレ
ット（３）上にセパレータ（６）と負極部（７）を被せ
て押し下げても、正極缶（１）内に貯溜された電解液
（５）の大部分がカール後も電池内に残存することか
ら、高性能で、かつ安定した性能を示す偏平形非水電解
液電池をその生産性を低下させることなく製造すること
が可能となる。As described above, according to the present invention,
Three or more notches (2b) in the annular body (2a),
The protrusions such as the projections (2c) are respectively provided on the circumference of the body (2c).
The inner can (2) protruding toward the inside of a) is replaced with the positive can (1).
Then, a disk-shaped mixture pellet (3) is hooked on the projection of the inner can (2) and held on the inner can (2), and in this state, the mixture pellet ( 3) and an electrolyte solution (5) in an electrolyte solution storage space (9) formed between the bottom of the main body (2a) of the inner can (2). The mixture was injected until it exceeded the lower end face, and immediately thereafter, the negative electrode portion (7) in which the separator (6) and the gasket (10) were fitted was placed on the mixture pellet (3), and the mixture pellet (3) Until the electrolyte reaches the bottom of the body (2a) of the inner can (2).
Is gradually pushed down to absorb liquid into the mixture pellet (3), and then the positive electrode can (1) is curled. Therefore, immediately after the electrolyte (5) is injected, the mixture pellet ( 3) Even if the separator (6) and the negative electrode part (7) are put on and pressed down, most of the electrolyte (5) stored in the positive electrode can (1) remains in the battery after curling. A flat nonaqueous electrolyte battery exhibiting high performance and stable performance can be manufactured without lowering its productivity.
【００１９】また、内缶（２）に設けられた凸部によ
り、合剤ペレット（３）との接触抵抗が低下し、電池内
部抵抗も低下する。Further, due to the projections provided on the inner can (2), the contact resistance with the mixture pellet (3) is reduced, and the internal resistance of the battery is also reduced.
【図１】本発明による偏平形非水電解液電池の製造方法
の一実施例を示す工程図であり、（ａ）は合剤ペレット
を内缶上に載置した状態を示す断面図、（ｂ）は正極缶
をカールした状態を示す断面図である。FIG. 1 is a process diagram showing one embodiment of a method for manufacturing a flat nonaqueous electrolyte battery according to the present invention, in which (a) is a cross-sectional view showing a state where a mixture pellet is placed on an inner can, (b) is a cross-sectional view showing a state where the positive electrode can is curled.
【図２】本発明による偏平形非水電解液電池の製造方法
において用いる内缶の別の例を示す断面図である。FIG. 2 is a sectional view showing another example of the inner can used in the method of manufacturing a flat nonaqueous electrolyte battery according to the present invention.
【図３】従来の偏平形非水電解液電池の製造方法の一例
を示す工程図であり、（ａ）は合剤ペレットを内缶上に
載置した状態を示す断面図、（ｂ）は正極缶をカールし
た状態を示す断面図である。FIG. 3 is a process diagram showing an example of a method for manufacturing a conventional flat nonaqueous electrolyte battery, in which (a) is a cross-sectional view showing a state where a mixture pellet is placed on an inner can, and (b) is a sectional view. It is sectional drawing which shows the state which curled the positive electrode can.
１……正極缶 ２……内缶 ２ａ……本体 ２ｂ……凸部（切り欠き） ２ｃ……凸部（突起） ３……合剤ペレット ５……電解液 ６……セパレータ ７……負極部 ９……電解液貯溜空間 １０……ガスケット DESCRIPTION OF SYMBOLS 1 ... Positive electrode can 2 ... Inner can 2a ... Main body 2b ... Convex part (notch) 2c ... Convex part (projection) 3 ... Pellet mixture 5 ... Electrolyte 6 ... Separator 7 ... Negative electrode Part 9: Electrolyte storage space 10: Gasket
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭55−16352（ＪＰ，Ａ) 特開 昭56−59467（ＪＰ，Ａ) 実開 昭57−170275（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) H01M 6/16 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-55-16352 (JP, A) JP-A-56-59467 (JP, A) Japanese Utility Model Showa 57-170275 (JP, U) (58) Field (Int.Cl. 7 , DB name) H01M 6/16
Claims (1)
（２ｂ、２ｃ）を円周上にそれぞれ該本体（２ａ）の内
側に向けて突設した内缶（２）を正極缶（１）内に溶接
し、 次いで、前記内缶（２）上に円盤状の合剤ペレット
（３）を当該内缶（２）の前記凸部（２ｂ、２ｃ）に引
っ掛けて保持し、 この状態で、前記合剤ペレット（３）と前記内缶（２）
の前記本体（２ａ）の底部との間に形成された電解液貯
溜空間（９）に電解液（５）をその液面が前記合剤ペレ
ット（３）の下端面を越えるまで注液し、 その後、直ちに前記合剤ペレット（３）上にセパレータ
（６）と予めリチウム等の負極作用物質を端子板に貼付
した負極部（７）を被せて、当該合剤ペレット（３）が
前記内缶（２）の前記本体（２ａ）の底部に達するまで
徐々に押し下げ、 その後、前記正極缶（１）をカールするようにして構成
した偏平形非水電解液電池の製造方法。1. An inner can (2) having three or more projections (2b, 2c) provided on an annular main body (2a) and projecting toward the inside of the main body (2a) on the circumference thereof. Welding into the can (1); and then, holding the disc-shaped mixture pellet (3) on the inner can (2) by hooking the convex portion (2b, 2c) on the inner can (2); In this state, the mixture pellet (3) and the inner can (2)
An electrolyte (5) is poured into an electrolyte storage space (9) formed between the bottom of the main body (2a) and the bottom of the mixture pellet (3), Then, immediately after the mixture pellet (3), a separator (6) and a negative electrode portion (7) in which a negative electrode active material such as lithium was previously adhered to a terminal plate were put on the mixture pellet (3). (2) The method for manufacturing a flat nonaqueous electrolyte battery according to (2), wherein the positive electrode can (1) is gradually depressed until it reaches the bottom, and then the positive electrode can (1) is curled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34025892A JP3301133B2 (en) | 1992-12-21 | 1992-12-21 | Method for manufacturing flat nonaqueous electrolyte battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34025892A JP3301133B2 (en) | 1992-12-21 | 1992-12-21 | Method for manufacturing flat nonaqueous electrolyte battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06187999A JPH06187999A (en) | 1994-07-08 |
| JP3301133B2 true JP3301133B2 (en) | 2002-07-15 |
Family
ID=18335219
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP34025892A Expired - Fee Related JP3301133B2 (en) | 1992-12-21 | 1992-12-21 | Method for manufacturing flat nonaqueous electrolyte battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3301133B2 (en) |
-
1992
- 1992-12-21 JP JP34025892A patent/JP3301133B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06187999A (en) | 1994-07-08 |
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