JPS6050658B2 - Lid for simple opening container and method for manufacturing the same - Google Patents
Lid for simple opening container and method for manufacturing the sameInfo
- Publication number
- JPS6050658B2 JPS6050658B2 JP11950877A JP11950877A JPS6050658B2 JP S6050658 B2 JPS6050658 B2 JP S6050658B2 JP 11950877 A JP11950877 A JP 11950877A JP 11950877 A JP11950877 A JP 11950877A JP S6050658 B2 JPS6050658 B2 JP S6050658B2
- Authority
- JP
- Japan
- Prior art keywords
- score
- opening
- bead
- lid
- auxiliary
- 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
- 238000004519 manufacturing process Methods 0.000 title description 11
- 238000000034 method Methods 0.000 title description 6
- 239000011324 bead Substances 0.000 claims description 36
- 238000003825 pressing Methods 0.000 claims description 14
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 238000005336 cracking Methods 0.000 description 3
- 241001391944 Commicarpus scandens Species 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 235000011962 puddings Nutrition 0.000 description 2
- 230000001954 sterilising effect Effects 0.000 description 2
- 238000004659 sterilization and disinfection Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- UNPLRYRWJLTVAE-UHFFFAOYSA-N Cloperastine hydrochloride Chemical compound Cl.C1=CC(Cl)=CC=C1C(C=1C=CC=CC=1)OCCN1CCCCC1 UNPLRYRWJLTVAE-UHFFFAOYSA-N 0.000 description 1
- 235000019687 Lamb Nutrition 0.000 description 1
- 241001494479 Pecora Species 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 235000011389 fruit/vegetable juice Nutrition 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Landscapes
- Containers Opened By Tearing Frangible Portions (AREA)
Description
【発明の詳細な説明】
本発明は、収納物を水羊日やプリン等とする缶詰に使
用する簡易開口缶に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an easy-to-open can used to store canned goods such as water lamb and pudding.
収納物を水羊日、プリン等とする缶においては、スプ
ーン等を入れて収納物を取り出す故、一 般のジュース
缶の如く比較的小さな注出孔のみを開封するのとは異な
り、開封に当つては、蓋体上面の大部分を除去する必要
があり、この為に蓋体のパネル部外周に沿う様に開口用
スコア−を設けている。そして、この様に蓋体上面の大
部分をパネル部とすると共に、その初期破断部分はリン
グタブと称する引き上片が設けられ、該引き上片の先端
を押圧部とすることによつて容易に開口用スコア−を破
断させるが、初期破断部分より該スコア−に沿つて両側
方に破断を拡大するに従つて破断に要する力が著しく大
きくなり、婦女子による破断開缶が困難てある。そこて
破断開封を容易とする為に種々の改良が行なわれ（例え
ば実開昭４８−９１０５吟）、又、缶材質をアルミニウ
ムとすると共に生産工程における割れの防止、変形の防
止、又輸送に際しての衝撃に耐える強度の付与等が考慮
されている。 この様に開封を容易としつつ、生産工程
において不用意に開口用スコア−が破断しない様にする
１為には開口用スコア−に沿つて補助スコア−を設ける
ことがあり、この様な従来技術としては例えば特公昭４
７−７５２吋の如きものがある。In cans that store contents such as water sheep, pudding, etc., a spoon, etc. is inserted to take out the contents, so unlike ordinary juice cans, where only a relatively small spout hole is opened, it is difficult to open the cans. In this case, it is necessary to remove most of the top surface of the lid, and for this purpose an opening score is provided along the outer periphery of the panel portion of the lid. In this way, most of the top surface of the lid is made into a panel part, and the initial breakage part is provided with a pull-up piece called a ring tab, and by using the tip of the pull-up piece as a pressing part, it can be easily The opening score is broken, but as the break spreads from the initial broken part to both sides along the score, the force required for breaking increases significantly, making it difficult for women and girls to break open the can. Therefore, various improvements have been made to make the cans easier to break and open (for example, Utility Model Publication No. 9105 Gin, 1973), and in addition to changing the can material to aluminum, improvements have been made to prevent cracking and deformation during the production process, and to prevent deformation during transportation. Consideration has been given to providing strength to withstand impact. In this way, in order to make opening easier and to prevent the opening score from being accidentally broken during the production process, an auxiliary score may be provided along the opening score. For example, Tokuko Sho 4
There are things like 7-752 inches.
ところで、アルミニウム製蓋を使用し、収納物充填後
にレトルト殺菌を施すとき、内容物の膨張門によりアル
ミニウム製蓋が缶外側に膨出し、冷却後も完全には原形
に復さず、変形が残る欠点があつた。この様な欠点を排
除し、且つ、開口除去部分に適宜の剛性を与える為開口
用スコア−に沿つてヒートを設けることがあり、この様
なヒートを設ける従来技術としては例えば前述の実開昭
４８一９１０関号や、実公昭４３−２３１９９号の如き
ものがある。この様に、従来においても種々の形状の開
口用スコアー及び補助スコアー、ビードを有する蓋体が
製造されていた。By the way, when using an aluminum lid and performing retort sterilization after filling the contents, the aluminum lid bulges out to the outside of the can due to the expansion gate of the contents, and even after cooling it does not completely return to its original shape, resulting in deformation. It was hot. In order to eliminate such drawbacks and provide appropriate rigidity to the portion from which the opening has been removed, a heat may be provided along the score for the opening, and a conventional technique for providing such a heat is, for example, the above-mentioned Jitsukasho. There are such things as Seki No. 48-910 and Utility Model No. 43-23199. In this way, lids having opening scores, auxiliary scores, and beads of various shapes have been manufactured in the past.
しかし、開封に際しては小さなりで容易に開口し得て、
且つ、製造、保管、輸送に際しては不用意に開口用スコ
アーが破断しない様にすることは困難であり、本発明は
開封を容易としつつ不用意な破断を生じさせない簡易開
口容器の蓋体及びその製造方法を提供せんとするもので
ある。本発明に係る蓋体１０は、第１図に示す様にパネ
ル部の外周に沿つて該外周よりもやや内側方に開口用ス
コアー１１を形成し、前記パネル部の開口用スコアー１
１の所要部分上に押圧部１５が当接するようにリングタ
ブ１９を固着し、前記リングタブ１９を引き上げて前記
開口用スコアー１１に囲まれた除去開口部を取り除くよ
うにした簡易開口容器の蓋体１０であつて、前記開口用
スコアー１１の内側方に沿つて補助スコアー１２を設け
、該補助スコアー１２はリングタブ１９の先端近くで不
連続とされ、更に該補助スコアー１２の内側に沿う様に
ビード１３を設け、該ビード１３もリングタブ１９の先
端近くで不連続とされ、且一つ、前記補助スコアー１２
の不連続部分をビード１３の不連続部分よりも長くした
ことを特徴とする蓋体１０であり、又、本発明に係る製
造方法はパネル部の外周に沿つて該外周よりもやや内側
方に開口用スコアー１１を形成し、前記パネル部の二開
口用スコアー１１の所要部分上に押圧部１５が当接する
ようにリングタブ１９を固着し、前記リングタブ１９を
引き上げて前記開口用スコアー１１に囲まれた除去開口
部を取り除くようにした簡易開口容器の蓋体１０におい
て、少なくとも、円３形開口用スコアー１１を設けると
共に、前記リングタブ１９の押圧部１５に近い部分を除
き前記開口用スコアー１１に沿いやや内側方に更に補助
スコアー１２を設け、然る後に補助スコアー１２に沿い
やや内側方であつて、且つ前記補助スコアー４１２の先
端１２″よりも一層リングタブ１９の押圧部１５の近く
に先端１３″をもつたビード１３を設けることを特徴と
する簡易開口容器の蓋体１０の製造方法てある。However, when opening the package, it can be easily opened with a small glue,
Furthermore, it is difficult to prevent the opening score from being accidentally broken during manufacturing, storage, and transportation, and the present invention provides a lid for an easy-to-open container that is easy to open and does not cause accidental breakage, and the lid body thereof. The purpose is to provide a manufacturing method. As shown in FIG. 1, the lid 10 according to the present invention has an opening score 11 formed along the outer periphery of the panel portion and slightly inward from the outer periphery, and the opening score 11 of the panel portion.
1, a ring tab 19 is fixed so that a pressing part 15 comes into contact with the required part of the container, and the removal opening surrounded by the opening score 11 is removed by pulling up the ring tab 19. In the body 10, an auxiliary score 12 is provided along the inner side of the opening score 11, the auxiliary score 12 is discontinuous near the tip of the ring tab 19, and further along the inner side of the auxiliary score 12. A bead 13 is provided on the ring tab 19, and the bead 13 is also discontinuous near the tip of the ring tab 19, and one of the auxiliary scores 12
The lid body 10 is characterized in that the discontinuous portion of the bead 13 is made longer than the discontinuous portion of the bead 13, and the manufacturing method according to the present invention is such that the discontinuous portion of the bead 13 is longer than the discontinuous portion of the bead 13. A score 11 for opening is formed, a ring tab 19 is fixed so that the pressing part 15 comes into contact with a required part of the score 11 for two openings of the panel part, and the ring tab 19 is pulled up to the score 11 for opening. In the lid body 10 of the simple opening container which is designed to remove the enclosed removal opening, at least a circular three-shaped opening score 11 is provided, and the opening score 11 is provided except for a portion of the ring tab 19 near the pressing part 15. An auxiliary score 12 is further provided along the auxiliary score 11 and slightly inward, and then a auxiliary score 12 is provided slightly inward along the auxiliary score 12 and closer to the pressing part 15 of the ring tab 19 than the tip 12'' of the auxiliary score 412. There is a method for manufacturing a lid 10 for an easy-to-open container, characterized in that a bead 13 having a tip 13'' is provided at the top.
即ち、従来は生産性向上の為、スコアー、ビード等を蓋
体１０の形状等を成形するとき同時に成形していたのに
対し、本発明においては、少なくとも開口用スコアー１
１及び補助スコアー１２を７設けた後、ビード１３を開
口用スコアー１１に沿つて設けることにより、従来の製
造方法では得られなかつた作用効果を得ることができ、
又、補助スコアー１２とビード１３に不連続部分を形成
し、且つ、補助スコアー１２の不連続部分をビークド１
３の不連続部分よりも長く構成しているので容易開口性
を高めつつ不用意な破断を防止し得る蓋体１０とするこ
とができるのである。That is, in the past, in order to improve productivity, scores, beads, etc. were molded at the same time as molding the shape of the lid body 10, but in the present invention, at least the score 1 for opening is molded.
1 and 7 auxiliary scores 12, and then by providing beads 13 along the opening scores 11, it is possible to obtain effects that could not be obtained with conventional manufacturing methods,
Also, a discontinuous part is formed between the auxiliary score 12 and the bead 13, and the discontinuous part of the auxiliary score 12 is formed in the bead 1.
Since the length is longer than the discontinuous portion 3, the lid 10 can be easily opened and can prevent accidental breakage.
即ち、本発明に係る方法は開口用スコアー１１を設けた
後にビード１３を形成する方法であり、開口用スコ７ア
ー１１部分のレシユジユアルと称される残存部１６が薄
肉となつている為に、ビード１３の形成時の応力が該ス
コアー部の残存部１６に集中し、この集中した応力によ
つて開口用スコアー１１の位置にくびれ１４を生じさせ
る（第２図参照）。・このようにビード１３を設ける際
に生じたくびれ１４は、開口時において開口用スコアー
１１のみでは得ることのできない容易開口性を与えるこ
とができる。他方必要以上の容易開口性を付与すること
は、欠陥蓋を生じることとなる。そこで適宜に補助スコ
アー１２を開口用スコアー１１の内側に設けることによ
リピート１３を形成する際の応力が過度に集中し、開口
用スコアー１１近傍のくびれ１４が大きくなりすぎ破断
が過度に容易となることがないように応力を分散させる
ものである。この様に開口用スコアー１１及び補助スコ
アー１２を設けた後にビード１３を成形してビード１３
を形成し、開口容易性を与えつつ補助スコアー１２によ
り過度に応力が集中することを防止するものてあつて、
開口に際し、特に大きな破断力を要する初期開口部分周
辺では、ビード１３の先端１３゛よりも敢て補助スコア
ー１２の先端１２″をリングタブ１９の押圧部１５から
遠ざけて設ける（第１図参照）ことにより開口用スコア
ー１１の残存部１６におけるくびれ１４を大きくｒ し
、初期破断が容易となる構造の蓋体１０とした。 この
様に、本発明に係る蓋体１０はパネル部の外周に沿つた
開口用スコアー１１を有する蓋体１０において、開口用
スコアー１１に沿つた補助スコアー１２とビード１３と
を設けるものであるから、ビード１３により開口除去部
に適宜の剛性が与えられ、加熱殺菌時等の膨張を吸収し
、又、ビード１３は開口用スコアー１１に沿つて設けら
れている為に、缶体１８への蓋体１０の巻締等の生産工
程においては、従来の開口用スコアーにあつては該スコ
アーを破壊する原因となる無駄な外力がビード１３に吸
収され、開口用スコアー１１の割れは防止され、又、輸
送に際しての衝撃に対してもビード１３が緩衝作用を有
し、変形、割れが防止され、且つ、補助スコアー１２の
不連続部分がビード１３の不連続部分よりも広く設けら
れている故、リングタブ１９の先端近傍における開口用
スコアー１１の残存部１６にはビード１３の成形時等に
応力が集中してくびれ１４を生じさせ、この応力の集中
は開口用スコアー１１及び補助スコアー１２の形成後に
ビード１３を形成する場合に、最も効率良く開口用スコ
アー１１に集中させることがでる。That is, the method according to the present invention is a method in which the bead 13 is formed after the opening score 11 is provided, and since the remaining portion 16 called a residual in the opening score 7a 11 portion is thin, Stress during the formation of the bead 13 is concentrated on the remaining portion 16 of the score portion, and this concentrated stress causes a constriction 14 at the position of the opening score 11 (see FIG. 2). - The constriction 14 generated when the bead 13 is provided in this manner can provide easy opening properties that cannot be obtained with the opening score 11 alone. On the other hand, providing more ease of opening than necessary will result in a defective lid. Therefore, by appropriately providing the auxiliary score 12 inside the opening score 11, the stress when forming the repeat 13 will be excessively concentrated, and the constriction 14 near the opening score 11 will become too large and breakage will be excessively easy. This is to disperse stress so that it does not occur. After providing the opening score 11 and the auxiliary score 12 in this way, the bead 13 is formed to form the bead 13.
and prevents stress from being excessively concentrated due to the auxiliary score 12 while providing ease of opening.
At the time of opening, in the vicinity of the initial opening part where a particularly large breaking force is required, the tip 12'' of the auxiliary score 12 is intentionally placed farther away from the pressing part 15 of the ring tab 19 than the tip 13'' of the bead 13 (see Fig. 1). As a result, the constriction 14 in the remaining portion 16 of the opening score 11 is made larger, and the lid body 10 has a structure that facilitates initial breakage.In this way, the lid body 10 according to the present invention has Since the lid body 10 having the ivy opening score 11 is provided with the auxiliary score 12 and the bead 13 along the opening score 11, the bead 13 provides appropriate rigidity to the opening removal part, and it can be used during heat sterilization. In addition, since the bead 13 is provided along the opening score 11, in the production process such as tightening the lid 10 to the can body 18, it is possible to absorb the expansion of the opening score 11. The bead 13 absorbs wasted external force that would otherwise cause the score to break, and the opening score 11 is prevented from cracking, and the bead 13 has a buffering effect against impact during transportation. Since deformation and cracking are prevented, and the discontinuous portion of the auxiliary score 12 is wider than the discontinuous portion of the bead 13, the remaining portion 16 of the opening score 11 near the tip of the ring tab 19 has a bead. Stress is concentrated during the forming of the opening score 13 and causes the constriction 14, and this stress concentration is most efficiently concentrated on the opening score 11 when the bead 13 is formed after the opening score 11 and the auxiliary score 12 are formed. I can do it.
しかし、ビード１３の形成が開口用スコアー１１や補助
スコアー１２と同時に形成される場合においても開口用
スコアー１１の残存部１６には加工時の応力が集中し易
く、押圧部１５近傍以外は補助スコアー１２によりこの
応力集中、ひいてはスコアーの過度の破断容易が防止さ
れ、開口用スコアー１１の押圧部１５近傍のみが極めて
破断容易となり、リングタブ１９を引き起す初期破断を
容易とし、前述の様にビード１３により輸送、保管時は
衝撃吸収が行なわれて不用意な破断が防止されつつ、開
口用スコアー１１の押圧部１５近傍以外が押圧部１５近
傍よりも多少破断が困難であつても、該ビード１３が開
口除去部に適宜の剛性を与える故、補助スコアー１２に
沿つた開口用スコアー１１の該部分における開封破断も
容易に進行させることができる蓋体１０である。そして
又、本発明に係る方法はこのような構造の蓋体１０の製
造に際し、開口用スコアー１１及び補助スコアー１２を
設けた後にビード１３を設ける故、ビード１３成形時の
応力を開口用スコアー１１の残存部１６に効果的に集中
させることがてき、開口用スコアー１１の押圧部１５近
傍に他の部分よりも大なるくびれ１４を生じさせる。こ
のように押圧部１５の下側開口用スコアー１１の残存部
１６のくびれ１４が大きくなるように製作するのてある
から、必要最小限の所要部分のみを破断容易とし、開口
時の容易開口性を高め得るものであり、開口用スコアー
１１に沿つたビード１３が衝撃吸収等の作用を有し、製
造、輸送時の破損を防止し得る蓋体１０を容易に製造し
得る方法である。However, even when the bead 13 is formed at the same time as the opening score 11 and the auxiliary score 12, stress during processing tends to concentrate on the remaining portion 16 of the opening score 11, and the auxiliary score is 12 prevents this stress concentration and, in turn, the score from being excessively easy to break, and only the area near the pressing portion 15 of the opening score 11 becomes extremely easy to break, which facilitates the initial breakage that causes the ring tab 19 and causes the bead to break as described above. 13 absorbs shock during transportation and storage to prevent accidental breakage, and even if parts of the opening score 11 other than the vicinity of the pressing part 15 are somewhat more difficult to break than the vicinity of the pressing part 15, the bead Since 13 provides appropriate rigidity to the opening removal portion, the lid 10 can easily open and break at the portion of the opening score 11 along the auxiliary score 12. Furthermore, in the method according to the present invention, when producing the lid body 10 having such a structure, the bead 13 is provided after the opening score 11 and the auxiliary score 12 are provided. can be effectively concentrated in the remaining portion 16 of the opening score 11, and a larger constriction 14 is produced near the pressing portion 15 of the opening score 11 than in other portions. In this way, since the pressure part 15 is manufactured so that the constriction 14 of the remaining part 16 of the lower opening score 11 is made larger, only the minimum necessary part can be easily broken, making it easy to open when opening. This is a method for easily manufacturing a lid 10 in which the bead 13 along the opening score 11 has a shock-absorbing effect and can prevent damage during manufacture and transportation.
第１図は本発明に係る蓋体の平面図にして、第２図、第
３図は要部断面図、第４図は缶体に取り付けた図である
。
１０＝蓋体、１１＝開口用スコアー、１２＝補助スコア
ー、１３＝ビード、１４＝くびれ、１５＝タブの押圧部
、１６＝開口用スコアーの残存部、１８＝缶体、１９＝
リングタブ。FIG. 1 is a plan view of the lid according to the present invention, FIGS. 2 and 3 are sectional views of the main parts, and FIG. 4 is a view of the lid body attached to the can body. 10=lid body, 11=opening score, 12=auxiliary score, 13=bead, 14=neck, 15=pressing part of tab, 16=remaining part of opening score, 18=can body, 19=
ring tab.
Claims (1)
開口用スコアーを形成し、前記パネル部の開口用スコア
ーの所要部分上に押圧部が当接するようにリングタブを
固着し、前記リングタブを引き上げて前記開口用スコア
ーに囲まれた除去開口部を取り除くようにした簡易開口
容器の蓋体において、前記開口用スコアー内側方に沿つ
て設けた補助スコアー及びビードを、前記リングタブの
近傍において不連続とし、且つ補助スコアーの前記不連
続部をビードの前記不連続部より長く構成したことを特
徴とする簡易開口容器の蓋体。 ２ パネル部の外周に沿つて該外周よりもやや内側方に
開口用スコアーを形成し、前記パネル部の開口用スコア
ーの所要部分上に押圧部が当接するようにリングタブを
固着し、前記タブを引き上げて前記開口用スコアーに囲
まれた除去開口部を取り除くようにした簡易開口容器の
蓋体において、開口用スコアーと該開口用スコアーの内
側に沿いリングタブの近傍に不連続部を有する補助スコ
アーとを設けた後、開口用スコアー内側方に沿つたビー
ドであつて、補助スコアーの先端よりも押圧部に近い先
端をもつて不連続部を有せしめたビードを設けることを
特徴とする蓋体の製造方法。[Scope of Claims] 1. An opening score is formed along the outer periphery of the panel portion slightly inward from the outer periphery, and a ring tab is formed such that the pressing portion comes into contact with a required portion of the opening score of the panel portion. In the lid of the easy-to-open container, in which the removal opening surrounded by the opening score is removed by pulling up the ring tab, the auxiliary score and bead provided along the inner side of the opening score are fixed. . A lid for an easy-to-open container, characterized in that the ring tab is discontinuous in the vicinity, and the discontinuous portion of the auxiliary score is longer than the discontinuous portion of the bead. 2. An opening score is formed along the outer periphery of the panel portion slightly inward from the outer periphery, and a ring tab is fixed so that the pressing portion comes into contact with a required portion of the opening score of the panel portion, and the ring tab is In the lid of a simple opening container in which a removal opening surrounded by the opening score is removed by pulling up the opening score, the opening score and an auxiliary member having a discontinuous part along the inside of the opening score and near the ring tab. After providing the score, a bead is provided along the inner side of the opening score, the bead having a discontinuous portion with a tip closer to the pressing part than the tip of the auxiliary score. How the body is manufactured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11950877A JPS6050658B2 (en) | 1977-10-06 | 1977-10-06 | Lid for simple opening container and method for manufacturing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11950877A JPS6050658B2 (en) | 1977-10-06 | 1977-10-06 | Lid for simple opening container and method for manufacturing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5454786A JPS5454786A (en) | 1979-05-01 |
| JPS6050658B2 true JPS6050658B2 (en) | 1985-11-09 |
Family
ID=14762988
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11950877A Expired JPS6050658B2 (en) | 1977-10-06 | 1977-10-06 | Lid for simple opening container and method for manufacturing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6050658B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS602441A (en) * | 1983-06-09 | 1985-01-08 | 武内プレス工業株式会社 | Easy open type can cover and manufacture of said can cover |
| EP2671813A1 (en) * | 2012-06-07 | 2013-12-11 | Crown Packaging Technology, Inc | Easy open closure with improved pressure performance |
-
1977
- 1977-10-06 JP JP11950877A patent/JPS6050658B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5454786A (en) | 1979-05-01 |
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