JPH0571470B2 - - Google Patents
Info
- Publication number
- JPH0571470B2 JPH0571470B2 JP18756089A JP18756089A JPH0571470B2 JP H0571470 B2 JPH0571470 B2 JP H0571470B2 JP 18756089 A JP18756089 A JP 18756089A JP 18756089 A JP18756089 A JP 18756089A JP H0571470 B2 JPH0571470 B2 JP H0571470B2
- Authority
- JP
- Japan
- Prior art keywords
- tape
- package
- welded
- tear tape
- tear
- 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
- 239000005022 packaging material Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 description 10
- 238000004806 packaging method and process Methods 0.000 description 10
- 238000003466 welding Methods 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000007789 sealing Methods 0.000 description 6
- 238000012805 post-processing Methods 0.000 description 5
- OEPOKWHJYJXUGD-UHFFFAOYSA-N 2-(3-phenylmethoxyphenyl)-1,3-thiazole-4-carbaldehyde Chemical compound O=CC1=CSC(C=2C=C(OCC=3C=CC=CC=3)C=CC=2)=N1 OEPOKWHJYJXUGD-UHFFFAOYSA-N 0.000 description 3
- 238000012858 packaging process Methods 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 235000013580 sausages Nutrition 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 235000013351 cheese Nutrition 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 229920006280 packaging film Polymers 0.000 description 1
- 239000012785 packaging film Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Landscapes
- Packging For Living Organisms, Food Or Medicinal Products That Are Sensitive To Environmental Conditiond (AREA)
- Packages (AREA)
Description
〔産業上の利用分野〕
本発明はソーセージ等の内容物を密封収納する
包装体の表面に開封テープを溶着した易開封性の
包装体に関する。
〔従来の技術〕
合成樹脂フイルム、例えば塩化ビニリデン系樹
脂フイルムを用い、例えばソーセージやチーズ等
を内容物とした筒状包装体は公知である。この種
の筒状包装体は、例えば特開昭58−171312号公報
の第１図に示されている様な装置によつて、平坦
な長尺帯状フイルムから連続的に筒状にするこ
と、即ちフオルダー部で帯状フイルムを反転さ
せ、その両側縁が重なり合うように折曲げて筒状
にし、その側縁の重なり部を溶着して製袋し、そ
の内部に内容物充填・密封することで、連続的に
筒状包装体が得られることで知られる。
一方この種の包装体の難点は、合成樹脂フイル
ムとその密封部との強靭さが相俟つて、包装体を
手等で開封することができ難いことである。従つ
てこの包装体に開封性を付与する提案も数多い
（例えば実公昭50−5916号公報、特公昭51−8080
号公報、実開昭62−36680号公報等。）
この種包装体の開封体は、包装体になつたとき
に別個の開封テープが包装体の適所に取付けられ
てある状態にすることである。しかし、これを実
用化するには困難な問題がある。即ち開封性を容
易にすることは、その包装体は製造途上や包装体
の加熱処理工程、及び包装体の移送・袋詰等の各
工程で受ける諸応力に対してその開封テープ部分
で破袋し易い状態になつていることを意味する。
従つてこの種の開封テープ付き包装体の実用化
は、容易に具現できないまま過きざりにされてい
る。
こうした現状に鑑みて本発明者等は、先に特開
昭63−317477号公報に記載の開封用テープ付け包
装体とその開封方法を完成した。この開封用テー
プは要するに、筒状包装体の端部密封部の近傍の
フイルム上に、筒軸と直交する方向に開封用テー
プを溶着して取付けた形態のものであるが、その
取付溶着シール線の片方側はテープの側縁に重な
り、シール線の他方側はテープ巾内いに留まつて
いる状態にあることを要件としている。この提案
の開封テープの性能は優秀で上記の調和の困難さ
を解消するものと期体したが、量産化の段階で別
の障害に直面した。即ち、「取付溶着シール線の
片方側とテープの側縁を重ねる」このの、製作精
度の難かしさである。つまり細い巾の開封テープ
を供給するときの、テープのわずかな供給ずれ
が、シール線の片方側をそのテープ側縁部よりは
み出たものや、内側に寄りすぎたものを生みだし
てしまう確率が、高いことの問題である。
本発明は、その意味ではこの特開昭63−317477
号公報の改良技術として創案されたものに当る。
〔発明が解決しようとする課題〕
包装体を開封して使用するときは、その開封が
容易に且つ確実に行なわれるが、その包装体の製
造工程・後工程・後処理工程では、その開封テー
プ部から破袋してしまうことがない開封テープの
溶着構造を提供すること、及びその溶着構造が加
工精度上の困難を伴なわない処の、所謂工業的に
容易に確実に繰返しの再現ができる開封テープの
溶着構造を提供することで、本発明ではその具現
を目的としている。
〔課題を解決するための手段〕
本発明は、上記目的を達成するために、内容物
を密封収納した筒状の包装材上の所定位置に細幅
の開封テープが溶着されていて成る包装体であつ
て、その開封テープの溶着部は、溶着される開封
テープの全長よりも短尺な長手寸法を有し、かつ
該溶着部のその両端部は中間部よりも膨れた拡形
部を有した形状であることを特徴とする開封テー
プ付き包装体を採用することである。
以下本発明の内容を図面等を用いて詳述する。
第１図及び第２図は、本発明で言う開封テープと
その溶着部の形状の関係を示す構造概念の平面
図、第４図は本発明で言う開封テープの溶着部構
造のものが取付けられた包装体の例示である。
第４図に於て本発明の包装体は、帯状フイルム
を溶着シール線１１で筒状にし、その中に内容物
を収納し、筒両端を密封部１３で密封して成る包
装体１０の、その密封部１３近傍位置のフイルム
上に、細幅の開封テープ４がその端末部９を自由
端にして筒軸に直交する方向に、開封テープ溶着
部１によつて取付けられてある。第１，２図に於
て、その（最大）幅寸法がw1、長さ寸法がｍの
開封テープ溶着部１は、幅寸法がｔ、長さ寸法が
Ｌである細幅の開封テープ４に比べて、幅、長さ
共に小寸法であつて開口テープのほぼ中央部に位
置している関係で、その長さ方向にはａの、幅方
向にはｔの溶着されていない自由端に当る処の開
封テープ端末部９が形成される。そしてこの溶着
部１の形状は、その中央部２はほぼ均一な幅寸法
w3で形成されるが、その両端部には（最大）幅
寸法w1に及ぶ膨れた形状の拡形部３が長手方向
にw2の寸法を有して、形成されている処に特徴
がある。即ち、第１図及び第２図で代表される形
状の溶着部１であることで、例えば第３図に示さ
れる様な従来の溶着部の形状のものとは、異なる
形状を有している。
本発明の溶着部１の形状寸法、即ちw1，w2，
w3の各寸法は次の関係にあるときが効果的で好
ましい。即ち、
w2＝0.5w1乃至2w1
w3＝0.9w1
w3＞0.5mm
w1＜ｔ
の関係である。つまり具体的に例えば開封テープ
４の幅寸法ｔを６mmとし、w3を２mmとすると、
w1は2.2mmより大きい寸法となる。例えばw1を３
mmとするとw2は1.5mm乃至６mmとなる。また前式
のごとくw1は少なくとも開封テープ４の幅寸法
より小さく、幅端からはみ出さないようになつて
いる。
第５図は包装材である帯状フイルム７に開封テ
ープ４を取付ける様子を示す断面概念図である。
この溶着操作は、固定電極５と可動電極６との
間に帯状フイルム７と開封テープ４とを挟み、両
電極間に通じる高周波電流によつて加熱溶着させ
ることになる。只この場合の難かしさは、両電極
５，６と、フイルム７の長軸に直交して位置する
開封テープとの双方を、走行する帯状フイルム７
の走行速度と同調させた速度で移動させながら上
記の溶着を完了させることで、細幅テープの供給
位置精度が特に要求される。又電極端の角から生
じる異常電流（スパーク）も大きな支障となる。
本発明の開封テープ４にある溶着部１の両端拡形
部３が角のないなだらかな膨らんだ様な形状〔例
えば第２図でのＲ，３ａ等〕になつているのは、
このスパーク現象を防ぐためのものである。
〔作 用〕
開封テープ４のほぼ中央に位置する開封テープ
溶着部１の形状で、その両端部にある拡形部３の
役割は、包装体にするための製袋工程、包装体の
後処理工程、及びその引き揃え、包装工程等の各
所で生じてしまう処の「開封テープ溶着部からの
包装体の破袋」と防止するためのものである。従
つてこの拡形部３はより大面積の状態にするほ
ど、上記諸工程で生じる破袋応力に対して強靭と
なるが、大面積にすぎると包装体を開封したい実
用時の、その易開封性が損なわれることになる
し、上述した様な開封テープ供給位置精度との関
係で、拡形部が開封テープの側縁外にはみ出す不
良原因になり易い。こうした意味に於て本発明で
言う溶着部１の形状構造は、製袋・包装体の諸製
造工程で生じる破袋応力には耐えるが、開封テー
プの端末部を指でつまんで開封テープを強く引き
めくる開封操作時は、簡単に包装体フイルムを引
き破ることが出来る形状寸法が選ばれており更に
開封テープの取付け時の位置調整精度をも考慮し
て選ばれた形状寸法でもある。
〔実施例〕
塩化ビニリデン系樹脂フイルム〔旭化成工業(株)
社製、厚み0.04mm、幅80mmの帯状長尺フイルム〕
を用い、魚肉ソーセージを一包装体当り約75gr内
装した処の、直径約22mm、長さ200mmの包装体を
能力150体／分のADパツカー（旭化成工業(株)
製；自動連続包装機）を用いて、繰返しの再現実
験をした。
この場合の開封テープ４は、軸ｔは８mm、長さ
Ｌは46mm、厚さ0.07mmの塩化ビニリデン系樹脂フ
イルムでそのほぼ中央に位置する開封テープ溶着
部１は、その形状が第１図に示すもので、最大巾
w1は４mm、長さｍは28mm、中央部の幅w3は２mm
拡形部長手寸法の形状寸法のものを用いた。開封
テープの取付けは、帯状フイルムの走行工程、即
ち帯状フイルムを筒状に折曲げる前の段階での、
帯状フイルムの走行途上で長軸に直交する方向に
取付けることを実施した。
得られた包装体は120℃のレトルト釜で熱処理
され、コンベアー装置で移送されながら引き揃え
られ、袋詰されたが、この実験では製袋包装工程
での破袋発生率と、包装体になつて以降の後処理
工程での破袋発生率とを区別して示すようにし
た。
尚この際の比較品としては、溶着部１の形状の
みを第３図の形に変更したもの（比較例１とす
る）と、特開昭63−317477号公報に記載の発明の
溶着部（第１表本発明品項）を工業的に再現した
もの（比較例２とする）とを加えた。評価は各々
の各母集団から10000本の包装体について抜取検
査の様式で行つた。その結果は第１表にまとめて
示す。
[Industrial Field of Application] The present invention relates to an easy-to-open package in which a tear tape is welded to the surface of the package for sealingly storing contents such as sausages. [Prior Art] A cylindrical package containing, for example, sausage, cheese, etc., using a synthetic resin film, such as a vinylidene chloride resin film, is well known. This type of cylindrical packaging is produced by continuously forming a flat long strip-shaped film into a cylindrical shape using, for example, a device such as that shown in FIG. That is, by inverting the film strip in the folder section, bending it so that both side edges overlap to form a tube, welding the overlapping portions of the side edges to form a bag, and filling and sealing the inside with the contents, It is known for being able to continuously produce cylindrical packages. On the other hand, a drawback of this type of packaging is that the synthetic resin film and its sealing portion are strong, making it difficult to open the packaging by hand. Therefore, there are many proposals for imparting openability to this package (for example, Japanese Utility Model Publication No. 50-5916, Japanese Patent Publication No. 51-8080).
Publication No. 62-36680, etc. ) The opening of this type of package is such that when the package is assembled, a separate tear tape is attached to the package in place. However, there are difficult problems in putting this into practical use. In other words, making the package easy to open means that the package will not break at the opening tape when exposed to various stresses during manufacturing, heat treatment of the package, and other processes such as transporting and bagging the package. It means that it is easy to do.
Therefore, the practical application of this type of package with a tear tape has not been easily realized and has been neglected. In view of the current situation, the present inventors have previously completed a package with an opening tape attached and a method for opening the package described in Japanese Patent Application Laid-Open No. 63-317477. In short, this tear-opening tape is attached to a film near the sealed end of a cylindrical package by welding it in a direction perpendicular to the cylinder axis. One side of the line must overlap the side edge of the tape, and the other side of the seal line must remain within the width of the tape. Although the proposed tear tape had excellent performance and was expected to solve the above-mentioned difficulty in harmonization, another obstacle was encountered at the stage of mass production. That is, ``overlapping one side of the attachment weld seal line with the side edge of the tape'' is difficult to manufacture accurately. In other words, when supplying narrow width tear tape, the probability that a slight deviation in the supply of tape will cause one side of the seal line to protrude from the edge of the tape or to be too far inward is as follows: The problem is that it is expensive. In that sense, the present invention is
This is a technique created as an improved technology of the No. 3 publication. [Problem to be Solved by the Invention] When a package is opened and used, it is easily and reliably opened, but in the manufacturing process, post-processing, and post-processing process of the package, the opening tape is used. To provide a welded structure of a tear-opening tape that does not cause the bag to break from the beginning, and where the welded structure does not involve difficulties in processing accuracy and can be easily and reliably reproduced on a so-called industrial basis. The present invention aims to realize this by providing a welded structure of a tear tape. [Means for Solving the Problems] In order to achieve the above object, the present invention provides a packaging body in which a narrow opening tape is welded to a predetermined position on a cylindrical packaging material that seals the contents. The welded part of the tear tape had a longitudinal dimension shorter than the entire length of the tear tape to be welded, and both ends of the welded part had an enlarged part that was more swollen than the middle part. The present invention is to adopt a package with a tear tape that is characterized by its shape. The contents of the present invention will be explained in detail below using drawings and the like.
1 and 2 are plan views of the structural concept showing the relationship between the shape of the tear tape according to the present invention and its welded portion, and FIG. This is an example of a package. In FIG. 4, the packaging body of the present invention is a packaging body 10 which is formed by forming a belt-shaped film into a cylinder shape with a welded seal line 11, storing the contents therein, and sealing both ends of the cylinder with sealing parts 13. A narrow opening tape 4 is attached to the film in the vicinity of the sealing part 13 by a opening tape welding part 1 in a direction perpendicular to the axis of the cylinder, with its terminal part 9 being a free end. In Figures 1 and 2, a tear tape welded part 1 whose (maximum) width is w 1 and a length m is a narrow tear tape 4 whose width is t and length is L. Since it is smaller in both width and length than , and is located almost in the center of the opening tape, the unwelded free end is a in the length direction and t in the width direction. A tear tape terminal portion 9 is formed at the corresponding location. The shape of this welded part 1 is such that its center part 2 has an approximately uniform width dimension.
It is formed with a width of w 3 , but it is characterized by a swollen expanded part 3 with a (maximum) width of w 1 at both ends and a dimension of w 2 in the longitudinal direction. There is. That is, the welded part 1 has the shape represented in FIGS. 1 and 2, and has a different shape from the conventional welded part shown in FIG. 3, for example. . The shape and dimensions of the welded part 1 of the present invention, namely w 1 , w 2 ,
It is effective and preferable for each dimension of w3 to have the following relationship. That is, the relationship is w 2 =0.5w 1 to 2w 1 w 3 =0.9w 1 w 3 >0.5mm w 1 <t. Specifically, for example, if the width t of the tear tape 4 is 6 mm and w 3 is 2 mm, then
w 1 is larger than 2.2mm. For example, w 1 to 3
If it is mm, then w 2 will be 1.5 mm to 6 mm. Further, as in the previous equation, w 1 is at least smaller than the width dimension of the tear tape 4, so that it does not protrude from the width edge. FIG. 5 is a conceptual cross-sectional view showing how the tear tape 4 is attached to the band-shaped film 7, which is a packaging material. In this welding operation, the band-shaped film 7 and the unsealing tape 4 are sandwiched between the fixed electrode 5 and the movable electrode 6, and heated and welded using a high frequency current flowing between the two electrodes. However, the difficulty in this case is that the strip-shaped film 7 running on both the electrodes 5 and 6 and the tear-opening tape located perpendicular to the long axis of the film 7
By completing the above-mentioned welding while moving at a speed synchronized with the running speed of the tape, precision in the feeding position of the narrow tape is particularly required. Also, abnormal current (spark) generated from the corner of the electrode end becomes a major problem.
The reason why the enlarged portions 3 at both ends of the welded portion 1 in the tear-opening tape 4 of the present invention are shaped like a gentle bulge without corners (for example, R, 3a in FIG. 2) is because
This is to prevent this spark phenomenon. [Function] The shape of the tear tape welded part 1 located almost in the center of the tear tape 4, and the role of the expanded parts 3 at both ends, are in the bag making process for making a package, and in the post-processing of the package. This is to prevent ``package breakage from the opening tape welding area'' that occurs at various points during the process, its alignment, packaging process, etc. Therefore, the larger the area of this enlarged part 3 is, the stronger it will be against the stress of bag breakage occurring in the above-mentioned processes, but if the area is too large, it will not be easy to open the package during practical use. Moreover, due to the above-mentioned relationship with the accuracy of the tear tape supply position, the enlarged portion is likely to protrude outside the side edge of the tear tape, resulting in a defect. In this sense, the shape and structure of the welded part 1 referred to in the present invention can withstand the stress of bag breakage that occurs during various manufacturing processes of bag making and packaging. The shape and dimensions were selected so that the packaging film could be easily torn off during the opening operation, and the shape and dimensions were also selected in consideration of position adjustment accuracy when attaching the tear tape. [Example] Vinylidene chloride resin film [Asahi Kasei Industries, Ltd.]
Long film strip, 0.04mm thick and 80mm wide]
AD Packer (Asahi Kasei Industries, Ltd.), which has a capacity of 150 packages per minute with a diameter of 22 mm and a length of 200 mm, contains approximately 75 gr of fish sausage per package.
Repeated reproduction experiments were conducted using an automatic continuous packaging machine (manufactured by Manufacturer Co., Ltd.). The tear tape 4 in this case is a vinylidene chloride resin film with an axis t of 8 mm, a length L of 46 mm, and a thickness of 0.07 mm. As shown, maximum width
w 1 is 4mm, length m is 28mm, width at the center w 3 is 2mm
The shape and dimensions of the enlarged length were used. The opening tape is attached during the running process of the film strip, that is, before the film strip is bent into a cylindrical shape.
The strip film was attached in a direction perpendicular to its long axis while it was running. The resulting packages were heat-treated in a retort pot at 120°C, then aligned while being transported by a conveyor device, and packed into bags.In this experiment, we investigated the incidence of bag breakage during the bag-making and packaging process, and the rate at which the packages were made. The rate of bag breakage in the subsequent post-processing process is shown separately. In this case, the comparison products include one in which only the shape of the welded part 1 is changed to the shape shown in FIG. An industrially reproduced product (Comparative Example 2) of the product of the present invention in Table 1 was added. The evaluation was carried out in the form of a sampling inspection of 10,000 packages from each population. The results are summarized in Table 1.
本発明は上述の構成を持つことにより、製袋包
装工程や該包装体の後処理・取扱い工程では破袋
することなく、それでいて開装したい実用時に
は、手でつまんで強く引き破ることで容易に開装
することが可能な、開封テープ付き包装体であ
る。
この様な包装体は、業界では渇望されていなが
ら、今だその量産実用化が図れていないものであ
るので、本発明と産業界に果す役割の大きい優れ
た発明である。
By having the above-described structure, the present invention does not cause the bag to break during the bag making and packaging process or the post-processing/handling process of the package, and yet when it is desired to open the bag, it can be easily opened by pinching it with your hands and tearing it forcefully. It is a package with a tear tape that can be opened. Although such a packaging body is highly desired in the industry, it has not yet been put into practical use in mass production. Therefore, the present invention is an excellent invention that will play a large role in the industry.
第１図および第２図は本発明の実施例を示す平
面図、第３図は従来の開封テープの溶着部を示す
平面図、第４図は開封テープを溶着した包装体を
示す平面図、第５図はシール電極を用いた溶着手
段の概要を示す側面図である。
１……開封テープ溶着部、２……中間部、３，
３ａ……拡形部、４……開封テープ、５……固定
電極、６……可動電極、７……帯状フイルム、８
……開封テープ用フイルム、９……端末部、１０
……包装体、１１……溶着シール線、１３……密
封部。
1 and 2 are plan views showing an embodiment of the present invention, FIG. 3 is a plan view showing a welded part of a conventional tear tape, and FIG. 4 is a plan view showing a package to which a tear tape is welded. FIG. 5 is a side view schematically showing a welding means using a seal electrode. 1...Tear tape welded part, 2...Middle part, 3,
3a... Expanded part, 4... Tear tape, 5... Fixed electrode, 6... Movable electrode, 7... Band-shaped film, 8
... Film for opening tape, 9 ... Terminal section, 10
. . . Packaging body, 11 . . . Welding seal line, 13 . . . Sealing portion.
Claims (1)
位置に細幅の開封テープが溶着されていて成る包
装体であつて、その開封テープの溶着部は、溶着
される開封テープの全長よりも短尺な長手寸法を
有し、かつ該溶着部のその両端部は中間部よりも
膨れた拡形部を有した形状であることを特徴とす
る開封テープ付き包装体。1 A package consisting of a narrow tamper tape welded to a predetermined position on a cylindrical packaging material that seals the contents, and the welded part of the tamper tape is longer than the total length of the tamper tape to be welded. 1. A package with a tear tape, characterized in that the welded part has a short longitudinal dimension, and both ends of the welded part have an enlarged part that is more swollen than the middle part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18756089A JPH0356271A (en) | 1989-07-21 | 1989-07-21 | Package with unsealing tape |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18756089A JPH0356271A (en) | 1989-07-21 | 1989-07-21 | Package with unsealing tape |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0356271A JPH0356271A (en) | 1991-03-11 |
| JPH0571470B2 true JPH0571470B2 (en) | 1993-10-07 |
Family
ID=16208221
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18756089A Granted JPH0356271A (en) | 1989-07-21 | 1989-07-21 | Package with unsealing tape |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0356271A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07870U (en) * | 1991-12-25 | 1995-01-06 | 好秀 猪狩 | Structure of unsealed parts of products that overlap with cellophane etc. |
| US8381940B2 (en) | 2002-09-30 | 2013-02-26 | Co2 Pac Limited | Pressure reinforced plastic container having a moveable pressure panel and related method of processing a plastic container |
| US7900425B2 (en) | 2005-10-14 | 2011-03-08 | Graham Packaging Company, L.P. | Method for handling a hot-filled container having a moveable portion to reduce a portion of a vacuum created therein |
-
1989
- 1989-07-21 JP JP18756089A patent/JPH0356271A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0356271A (en) | 1991-03-11 |
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| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |