JP2004262466A - Easily unsealable container lid with resealability and its manufacturing method - Google Patents
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- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【０００１】
【発明の属する技術分野】
本発明は、易開封性容器蓋及びその製造方法にし、特に、パーシャルオープンタイプの容器蓋で、一旦開封した開口を再び仮封止する等の暫定再封止が可能な開封口リシール性を備えた易開封性容器蓋及びその製造方法に関する。
【０００２】
【従来の技術】
易開封性容器蓋（イージー・オープン蓋）は、食缶や飲料缶等の食品容器蓋として広く使用されているが、これには、コーラ、ビール、ジュース等の各種飲料を収容する飲料缶の缶蓋に主に使用されるパーシャルオープンタイプの容器蓋と、主に缶詰、インスタントラーメン、スナック菓子等の食缶の缶蓋に使用されるフルオープンタイプの容器蓋とがある。
【０００３】
又、パーシャルオープンタイプの容器蓋には、易破断開口片が引剥がし開封により容器蓋から完全に切り離されるプルトップ・タブ・タイプのものと易破断開口片の一部を容器蓋に連結させたまま容器内に押し込む等により、開封後も破断開口片が容器蓋から切り離されないステイオン・タブ・タイプのものとがある。
【０００４】
しかし、開口片が容器蓋から完全に切り離される、所謂、プルトップ・タブ・タイプのものは、切り離された開口片が鋭利な破断面を有する等のため、単にゴミとして環境を汚すだけでなく、不用意に捨てられるとそれに触れたり、それを口にした幼児等に不測の危害を与え、且つ、自然界に散乱した場合も魚や鳥、動物等に損傷を与える可能性があるため、近年、上記のような問題がないステイオン・タブ・タイプのものが多く使用されるようになってきている。
【０００５】
このような容器蓋には、易開封性や密封性と共に内容物の性質如何よっては耐内圧強度や耐腐食性、特に内容物中への溶出が無いことが強く求められる。
このため、従来から高強度で、可撓性に富み、且つ耐食性に優れた積層材、特に、金属箔や樹脂薄板等の基材に非溶出性の樹脂を被覆した積層材からなる蓋本体やタブが多く用いられている。
【０００６】
例えば、特許文献１には、易開封性とバリヤ性に優れ、且つ、耐内圧強度を強化する目的で、開口を有する蓋体となる基材（熱可塑性樹脂）にヒートシール性を有する積層体を接着層を介して接着し、積層体の接着強度が積層体の層間接着強度より強く、接着層の引張強度が積層体の層間接着強度より弱く構成したことを特徴とする易開封性蓋体が開示されている。
【０００７】
又、特許文献２には両面樹脂被覆した金属箔積層体からなる開封片と予め開口形成され、該開口の周縁端部が特定構造に保護被覆された樹脂被覆金属板蓋体とを熱接着させて成る易開封性容器蓋の発明が開示されている。
【０００８】
【特許文献１】
特開平１１ー０１１５２６号公報
【特許文献２】
特公昭６０ー１２１６号公報
【０００９】
【発明が解決しようとする課題】
ところが、このようにパーシャルオープンタイプのステイオン・タブ容器蓋が一般的となった極最近に至り、この容器蓋にリシール性を持たせ、一旦開封した開口を再び軽く仮止する等により容器内を暫時再密閉したり、蓋付きのままレトルト処理したり出来る易開封性容器蓋の提供が俄に要望されるようになってきた。
然し、易開封性容器は、本来一回限りの使い捨て使用が原則で、開封も一回限りで、開封された後の容器蓋開口のリシール（再封止）は、従来考えられなかったと云って過言ではない。
【００１０】
事実、本発明者が調査した限りにおいて、一旦開封した開口部のリシールを目的とした易開封性容器蓋の提案は一件も見出すことは出来なった。
然も、容器蓋を実質的に漏れなく、且つ、安全、確実にリシールするには、リシール時に、ある程度の開口密封性が必要であると共に、更に、少なくとも一度開封され、その後リシールされた蓋と未だ未開封の蓋とが容易に識別でき、缶の内容物が知らぬ間に変更されていない保証を容易に得ることが出来るようにすることが悪戯や犯罪予防等の見地から特に重要である。
【００１１】
既に述べた従来の樹脂被覆金属箔タブ又は開封片等では、それを用いてリシールした場合、密封性が殆ど得られなかったり、リシール時の密閉性が得らるものであっても既開封と未開封との識別が付き難かったりして、上記目的を充分に達成することが出来ない。
【００１２】
本発明者等は、上記課題の解決に向け鋭意研究を重ねた結果、開封片である開封用タブに、蓋体の開口に嵌合し得るプラグ部材を付設する構成により、上記リシール性が充分に達成出来、且つ、既開封、未開封の識別も容易に出来ることを見出しその知見に基づいて本発明を完成させるに至った。
【００１３】
従って、本発明の目的は、リシール性を備えた易開封性容器蓋、特に、パーシャルオープンタイプのステイ・オン・タブ付き容器蓋で、一旦開封した開口を再び仮封止する等の暫定再封止が繰り返し可能な開封口リシール性を備え、樹脂被覆タブのみで開口部をカバーする形態のものに比べて顕著にリシール封止性に優れた易開封性容器蓋を提供するにある。
【００１４】
又、本発明の他の目的は、少なくとも一度は開封され、その後リシールされた蓋と未だ未開封の蓋とが容易に識別でき、個々の缶内容物が知らぬ間に変更されていない保証が容易に得られる易開封性容器蓋を提供するにある。
又、本発明の別の目的は、従来品に比べ、耐圧、落下強度が大幅に向上した易開封性容器を形成し得る容器蓋を提供するにある。
又、本発明の更に別の目的は、開口周辺部での接着面積を小さくすることが出来るため易開封性が顕著に向上した容器蓋を提供するにある。
【００１５】
更に、本発明の別の目的は、従来のステイ・オン・タブ付き容器蓋のように開口片が缶内に入らないため、衛生的に優れた易開封性容器蓋を提供するにある。
又、更に、本発明の目的は、上記リシール性を備えた易開封性容器蓋を製造する方法を提供するにある。
【００１６】
【課題を解決するための手段】
本発明によれば、予め形成された開口部を備えた蓋部材と該蓋部材の外面側に該開口部を覆い且つ開口周辺部で密封接着するように施された開封用タブとからなる易開封性容器蓋に於いて、
前記開封用タブは、可撓性タブ部材と該タブ部材に接着一体化すると共に前記蓋部材の開口部に嵌合可能に形成されたプラグ部材とから成り、且つ、前記可撓性タブ部材が、前記蓋部材開口周辺部で引剥し可能に密着固定されていることを特徴とするリシール性を備えた易開封性容器蓋が提供される。
【００１７】
本発明の易開封性容器蓋は、開封用タブ（開封片）が可撓性タブ部材部分とプラグ部材部分とから成り、プラグ部材は蓋部材の開口部に嵌合する形状構造に形成されると共に前記タブ部材に接着して一体化され、一方、可撓性タブ部材は蓋部材開口周辺部で引剥し可能に密封接着されていることが構造上の顕著な特徴である。
【００１８】
開封用タブが上記特定構造を有することにより、本発明の易開封性容器蓋は一度開封した後でもプラグを開口部に押し込むことで幾度でも簡易に暫定的な再シールが可能で、従来の樹脂膜被覆金属箔タブ（テープタブ）のみで開口部を覆う場合に比べて格段に優れたリシール性を示す。
然も、開封部分に於ける接着面積が開口周縁部のみの小面積で接着強度を比較的小さく出来るため開口性が向上する。
【００１９】
更に、一度開封され、その後リシールされた蓋と未だ未開封の蓋とが夫々の状態での形状から容易に識別でき、個々の缶内容物が知らぬ間に変更されていない保証が容易に得られる。
更に、上記易開封性容器蓋の特定構成により、従来のものに比べて容器の耐圧、落下強度が大幅に向上される。
【００２０】
本発明の容器蓋において、蓋部材の開口端縁が、蓋外側へ折り曲げられるか、又はカーリングされるか、或いは、樹脂被覆により端縁処理された態様のものは、開封後の開口端縁が先鋭でなく、且つ、腐食等からも保護される。
然も、開封用タブのプラグ部材との嵌合馴染みが良く、リシールを繰り返してもプラグ部材を傷つけることが無いため嵌合状態を長く良好に維持することが出来好ましい。
【００２１】
可撓性タブ部材としては、金属箔の両面に樹脂皮膜が形成された積層体からなるものがタブ引裂き時の引張り強度と可撓性とのバランス上、及び腐食耐性の点から好ましい。
【００２２】
蓋部材は、周縁部に巻締加工部を有する金属製の部材であることが好ましい。
前記蓋部材が、外面側は少なくとも前記可撓性タブ部材に対し熱接着性を有し、内面側は可撓性タブ部材及びプラグ部材に対し非接着性であることが可撓性タブ部材やプラグ部材との密着性と内容物への非溶出性の両方を担保する観点から特に望ましい。
又、開封用タブが、その可撓性タブ部材に加えて、更に、プラグ部材も前記蓋部材の開口周辺部に接着されている態様のものは、特に、高温、衝撃等の過酷な条件に曝される容器の密閉性担保の観点からより好ましい。
【００２３】
開封用タブが、その開封開始端部から前記開口を挟んだ対向側に位置して脱離困難に蓋部材に付着した部分を有し、開封後においても開封用タブが蓋部材から脱離しない容器蓋、特に、蓋部材に付着した部分の直前部分で、引剥がし方向にほぼ直交する方向に両側が切欠かれ該部分のタブ幅が狭められた形状である容器蓋構成のものは、該部分で引剥がし進行が容易に停止するため好ましい。
又、プラグ部材は、射出成形又は圧縮成形により形成された樹脂製プラグ部材或いはプレス成形により形成された金属製プラグ部材であることが好ましい。
【００２４】
本発明は、又、上記本発明のリシール性を備えた易開封性容器蓋の製造方法であって、予め形成された開口部を備えた蓋部材の該開口部の端縁処理をする工程、可撓性タブ部材とプラグ部材を一体化して開封用タブを成形する工程、蓋部材の外面側となる面に前記開封用タブを施し、開口周辺部に於いて可撓性タブ部材と蓋部材外面を接着させる工程、とから成ることを特徴とする易開封性容器蓋の製法を提供する。
又、前記開封用タブが、可撓性タブ部材上にプラグ部材を射出成形或いは圧縮成形により一体成形される態様の製法は本発明の開封用タブ形状を正確且つ効率的に形成できる観点から特に好ましい。
【００２５】
更に、本発明は、予め形成された開口部を備えた蓋部材の該開口部の端縁処理をする工程、可撓性タブ部材及びプラグ部材を夫々成形する工程、蓋部材の外面側となる面に、前記可撓性タブ部材及びプラグ部材を、プラグ部材が蓋部材の開口部に嵌合し、プラグ部材を可撓性タブ部材が覆うように蓋部材外面上に設置して、可撓性タブ部材とプラグ部材を接着一体化して開封用タブを成形すると同時に蓋部材外面に可撓性タブ部材を接着する工程、とから成ることを特徴とする易開封性容器蓋の製法をも提供する。
【００２６】
【発明の実施の形態】
以下に本発明のリシール性を備えた易開封性容器蓋及びその製造方法を図面を参照して詳細に述べる。
【００２７】
図１乃至図４は、本発明の易開封性容器蓋の全体構成を説明するための斜視図であって、図１は組込前の状態での容器蓋の主要構成部材を示し、図２は容器蓋が開封された状態を示す。
又、図３は一部部材形状が異なる以外図１、２で示した容器蓋と同じ本発明の容器蓋の組込前主要構成部材を示し、図４はその容器蓋の未開封状態とその状態での蓋の断面構造を示す。
【００２８】
図１、図２から明らかなように、本発明の容器蓋は、全体として示す蓋部材１と全体として示す開封用タブ２とからなる。
蓋部材１は、予め形成された開口１ａを有し、開封用タブ２は、可撓性のタブ部材２ａとプラグ部材２ｂとからなり、プラグ部材２ｂは蓋部材１の開口１ａに嵌合するように、この図の容器の場合、ほぼ円錐台形に形成され、底面側が可撓性タブ部材２ａの符号２ｄで表されている部分に接着される。
そして、開封用タブ２は、蓋部材１の開口１ａを覆い、且つ、開口１ａの周辺部とタブ２の可撓性タブ部材２ａが密封接着するように設けられている。
【００２９】
この容器蓋では開封用タブ２の接着は可撓性タブ部材２ａの部分のみで行われているが、可撓性タブ部材２ａのみでなくプラグ部材２ｂとも接着させることも可能で、この態様のものは、高温、衝撃等の過酷な条件に曝される容器の未開封時密閉性だけでなく、リシール時の密閉性をも含めてより良好な密閉性を担保出来る観点から好ましい。
又、開封用タブ２は、それが蓋部材１の開口部１ａ上に配設された状態での開封開始端２ｆから開口を挟んだ対向側部分に蓋部材１と強固に結合する部分を有し、図示した態様の容器蓋では、当該部分には３筋のカールが形成されている。
【００３０】
この３筋のカール形状は蓋部材１の対応する位置にも設けられ、両者のこれらカール同志が接着されることにより両部材が強固に接合固定されている。
これにより、開封用タブ２をその開封開始端２ｆから引剥して容器開封した後においてもタブ２が蓋部材１から脱離しない構成となっている（図２参照：ステイオン・タブ・タイプ）。
【００３１】
図３，４に示した容器蓋は、蓋部材１’と開封用タブ２’とからなり、蓋部材１’が開口１ａ’を有し、開封用タブ２’は、可撓性タブ部材２ａ’とプラグ部材２ｂ’からなり、プラグ部材が開口１ａ’に嵌合するように形成されて可撓性タブ部材２ａ’に接着一体化される点は前記図１，２の容器と同じである。
そして、この容器蓋でも、開封用タブ２’は、開口１ａ’を覆い、且つ、その周辺部と可撓性タブ部材２ａ’とが密着状に設けられる。
ただ、この容器蓋には、前記図１，２の容器のカールは設けられてい無く、蓋部材１’と可撓性タブ部材２ａ’との接着部は平坦面である。
その替わりに、図３，４の容器蓋では、両部材の接着固定部分の直前部分２ｃ’で可撓性タブ部材２ａ’が幅方向に両側から切欠かれ、ここで引剥進行が停止するように構成されている。
【００３２】
上記本発明の易開封性容器蓋を開封するには、前記開封用タブ２（２’）のつまみ２ｅ（２ｅ’）を指でつまみながら該タブ２（２’）を、その開封開始端部２ｆ（２ｆ’）から手前側に引いて蓋部材１（１’）の開口部１ａ（１ａ’）上を引き剥がし、前記タブ２（２’）、蓋１（１’）両部材の固定接着部分の前で停止する。
又、一度開封した後のリシールは、開封用タブ２（２’）のプラグ部材２ｂ（２ｂ’）の接着部２ｄ（２ｄ’）上面を押圧する等によりプラグを開口に再嵌着させる。
【００３３】
本発明の容器蓋の重要な特徴は、開封用タブに、開口に嵌合する形状のプラグ部材を付設した点にある。
このプラグ部材がやや肉厚であることにより、リシール時の弾性反発力等が強く、従来のテープタブのみで開口部を覆う場合に比べて格段に優れたリシール密封性を示す。
【００３４】
上記本発明のプラグ部材には、必ずしもこれに限定される訳ではないが、樹脂製プラグとメタル製プラグとが好適に使用できる。
【００３５】
比較的低温で使用される容器、腐食性内容物を収容する容器、特に高い耐圧性能が求められない容器等の場合には柔軟でシール弾性に富み、より多く繰り返しリシールが可能な樹脂製のプラグの使用が好ましく、一方ホット充填、レトルト処理等、特に高い温度に曝される容器や特に高い耐圧性能を求められる容器或いはプラグ部材の厚さが制限される容器等には高強度で高温耐性の良いメタル乃至樹脂被覆メタル製プラグの使用が好ましい。
又、樹脂プラグの場合、内容物への溶出性が低いことが重要であり、メタルプラグの場合、内容物に対し耐食性を有することが重要である。
【００３６】
このような樹脂プラグに用いられる樹脂材料としてポリプロピレン、高密度ポリエチレン等のポリオレフィン樹脂類、ポリエチレンテレフタレート（ＰＥＴ）、ポリブチレンテレフタレート（ＰＢＴ）、ポリエチレンテレフタレートイソフタレート等のポリエステル類、６ナイロン、６、６ナイロン等のポリアミド類及びこれらのブレンド組成物等を挙げることが出来る。
【００３７】
また、メタルプラグに用いられる金属材料としては、アルミニウム、スチール等を挙げることが出来、ラミネートメタルプラグの場合、ラミネート材としては可撓性タブ部材と接する面側は、少なくとも、該部材の構成材と接着性を有する材料で、例えば、ポリプロピレン等を用いることが必要であり、蓋部材と接する面側は該蓋開口端部に対する嵌合シール性に優れ且つ内容物に対し保護作用を奏する例えばポリエステル、ポリアミド等の使用が好ましい。
【００３８】
上記プラグ部材が、樹脂製の場合、その成形法としては、射出成形又は圧縮成形等の方法を挙げることが出来、可撓性タブ部材との接合は、夫々の材質に応じて、適宜、接着剤による接着、或いは、熱接着等を用いて良い。
【００３９】
一方、金属製プラグ部材の場合はプレス成形等による。
又、開封用タブ製作時にインサート成形により同時形成させることも出来る。
上記プラグ部材が接着される可撓性タブ部材の構成材としては、通常この種の容器蓋に用いられる開封片やタブ構成材であって前記プラグ材と接合可能な材料であれば必ずしもこれに限定されるものではないが、金属箔の両面に樹脂皮膜が形成された積層体からなるものがタブ引裂き時の引張り強度と可撓性とのバランス上、及び、腐食耐性の点から特に好ましい。
【００４０】
このような積層材の具体的な好適例として、アルミニウム箔の片面側にＰＥＴを他面側にＰＰを夫々ラミネートした積層材を挙げることが出来る。
【００４１】
次に、本発明の蓋部材について更に詳細に説明する。
本発明の蓋部材において、開口部の端縁は、例えば、図４の蓋部材の開口端縁部の拡大断面図である図５に符号１ｇ’で示したように蓋部材の外側に向けてスムーズな曲面形状に折曲げられているか、端縁部カーリング処理或いは図６に示したように、ＰＥＴ、ＰＰ等でリング状に樹脂被覆処理され、鋭利な角等のないスムーズな曲線形状に形成されていることが、開封後の蓋体端縁部がスムーズで仮に該部分に不用意に接触しても、切傷等の損傷を与える危険が無く、且つ、腐食等からも保護され、然も、開封用タブのプラグ部材との嵌合馴染みが良いため、リシールを繰り返してもプラグ部材を傷つけることが無い等良好な嵌合状態を長く維持出来好ましい。
又、蓋部材の周縁部には缶胴体部との巻締加工による密閉接合が可能なように巻締加工部を有するものがより好ましい。
【００４２】
更に、蓋部材表面は、外面側が少なくとも前記可撓性タブ部材と熱接着性を有し、プラグも接着される態様のものの場合は該プラグ部材とも熱接着性を有することが好ましく、一方、内面側は可撓性タブ部材及びプラグ部材に対し非接着性であることが、可撓性タブ部材やプラグ部材との密着と内容物への非溶出の両方を担保する観点から特に望ましい。
【００４３】
以下に、本発明の容器蓋に於ける蓋部材の開口端縁部と開封用タブの可撓性タブ部材との接着態様及びプラグ部材との嵌合態様について、各種の具体例を挙げて更に詳細に説明する。
【００４４】
図７は、樹脂プラグを用いた場合の本発明の容器蓋（未開封）の一例を示す平面図（ａ）、断面図（ｂ）及び開口端縁と可撓性タブ部材との接着部位及び開口端縁とプラグ部材との嵌合封止態様を説明するための部分拡大図（ｃ）である。
図７の容器蓋では、開口端縁１ｉは蓋部材１の外面側（図では上方側）に向けてスムーズな曲面を形成するように折曲げられ、その嵌合封止面は符号Ｃで示された部分、即ち蓋の中心方向に向いている。
この態様の嵌合では封止は主として樹脂プラグ部材の径方向反発弾性力により維持される。
そしてこの図の容器蓋では可撓性タブ部材２ａがＡ部分で蓋部材１に接着されている。
【００４５】
図８は同様に樹脂プラグを用いた本発明の容器蓋の他の一例を示す平面図（ａ）断面図（ｂ）及び、部分拡大図（ｃ）であるが、折曲げられた開口端縁１ｉの嵌合部分（封止部分）は符号Ｃで示され、その面は蓋の周縁方向を向いている。
そして蓋部材１は可撓性タブ部材２ａとＡ部で、プラグ部材２ｂとＢ部で夫々接着されている。
この態様の嵌合では、例え、容器蓋が加熱を受けた場合でも、可撓性タブ部材２ａの端縁近く（図では傾斜部分近傍）と開口端縁１ｉの間に挟まれた部分のプラグ部材の膨張が抑制されるため封止が損なわれ難く、又、リシールを繰り返してもプラグ樹脂のクリープ発生が遅延され弾性の耐久性に優れる利点を有する。
【００４６】
又、図９は、メタルプラグを用いた場合の本発明の容器蓋の一例を示す平面図（ａ）、断面図（ｂ）及び部分拡大図（ｃ）である。
図９の容器蓋では、開口端縁１ｉは蓋部材１の外側（上方）に向けて折曲げられ、その嵌合封止面は、符号Ｃで示されているように、蓋の中心方向に向いている。
そしてこの図の容器蓋では蓋部材１は可撓性タブ部材２ａとＡ部分で接着されている。
【００４７】
これに対し、図１０はメタルプラグを用いた場合の容器蓋の別の一例の平面図（ａ）断面図（ｂ）及び、部分拡大図（ｃ）であるが、折曲げられた開口端縁１ｉの嵌合封止面（符号Ｃの部分）は蓋の周縁方向に向いている。
そして蓋部材は可撓性タブ部材とＡ部分で接着されている。
【００４８】
上記した本発明の易開封容器蓋を製造する方法としては、プラグ部材が樹脂製で、その嵌合封止面が蓋の外周縁方向を向いている図８に示した態様の容器蓋の場合、例えば、組立工程図、図１１に示した方法を例示することが出来る。
【００４９】
即ち、この製造方法では、先ず、開口１ａが設けられた蓋部材１の開口端縁部１ｉを外面側（図では上方側）に向けてスムーズな曲面を形成するように折曲げ、端縁処理する（エンド成形）。
【００５０】
一方、開封用タブ２の可撓性タブ部材２ａの素材（ＰＥＴ／Ａｌ／ＰＰ積層シート）を該タブ形状（図８（ａ）、（ｂ）参照）に成形する（タブ成形）。
この成形された可撓性タブ部材２ａにプラグ部材２ｂ形成用樹脂（ＰＥＴ）を射出成形又は圧縮成形によりタブ部材２ａ内に一体形成させて開封用タブ２を作製する（プラグ インサート成形）。
【００５１】
次いで、開封用タブ２のプラグ２ｂを焼鈍熱処理し（プラグ アニーリング）、その後、該開封用タブ２の可撓性タブ部材２ａとプラグ部材２ｂの各所定接着部分を蓋部材端縁部１ｉに接着させる（接着）。
接着終了後、開封用タブの端縁２ｉを端縁処理する等の仕上げ処理を施して完成品とする（完成）。
【００５２】
図１２は、図１１と同じ態様の樹脂プラグ容器蓋の別の製造方法を示した組立工程図で、前記図１１の方法とは、プラグ２ｂのインサート射出成形、可撓性タブ部材２ａの蓋体開口端部１ｉへの接着、プラグ部材２ｂの蓋体開口端部への接着をほぼ連続して逐次的に実施し、その後に焼鈍熱処理する点が異なる。
【００５３】
図１３は、図１１と同じ態様の樹脂プラグ容器蓋の更に別の製造方法を示した組立工程図で、この方法では、プラグ２ｂのインサート射出成形と蓋部材開口端縁１ｉへの接着とを可撓性タブ部材２ａの成形とは別個に実施し、次いで該蓋部材１に接着されたプラグ２ｂを焼鈍処理した後に、別に成形した可撓性タブ部材２ａをプラグ２ｂと蓋部材開口端部１ｉに夫々接着し、その後、仕上げ処理して完成する。
図１４も、図１１と同じ態様の樹脂プラグ容器蓋の更に別の製造方法を示した組立工程図で、この方法では、蓋部材１の開口端縁１ｉ処理と、プラグ部材２ｂ成形及びその焼鈍と、可撓性タブ部材２ａ成形とを夫々個別に行い、先ずプラグ部材２ｂを蓋開口端部１ｉに嵌め込み、しかる後、蓋部材１、プラグ２ｂ、可撓性タブ部材２ａを夫々接着し、仕上げて完成品とする。
又、プラグ部材がメタル製で、その嵌合封止面が蓋の中心方向を向いている図９に示した態様の容器蓋の場合、例えば、組立工程図、図１５に例示した方法で製造することが出来る。
【００５４】
即ち、この方法では、蓋部材１の開口端縁１ｉ処理（エンド成形）とメタルプラグ部材２ｂ成形（プラグ成形）と可撓性タブ部材２ａ成形（タブ成形）を夫々個別に行い、先ずメタルプラグ２ｂを蓋開口端部１ｉに嵌め込み（エンド〜プラグはめ込み）、その密封性を検査した後、可撓性タブ部材２ａを接着し、最後に仕上げ処理して完成品とする。
【００５５】
図１６は、図１５と同じ態様のメタルプラグ容器蓋の別の製造方法を示した組立工程図で、この方法では、夫々個別に成形した蓋部材１の開口端縁１ｉとメタルプラグ部材２ｂと可撓性タブ部材２ａの内、先ず、プラグ部材２ｂと可撓性タブ部材２ａとを仮接着し、その後、仮接着されたプラグ部材２ｂと可撓性タブ部材２ａとを本接着すると共に蓋部材１と接着させ、仕上げ完成品とする。
【００５６】
又、本発明の開封タブの可撓性タブ部材を積層シート等の素材シートから成形するには、例えば、図１７（可撓性タブ部材の製造工程説明図）に示すように、素材シートを、第１工程；Ｂｌａｎｋｉｎｇ（穴開け）、第２工程；Ｂｌａｎｋｉｎｇ（切進め）、第３工程；Ｐａｎｅｌｉｎｇ（張り出し）、第４工程；Ｃｕｒｌｉｎｇ（曲げ縮め）、第５工程；Ｂｌａｎｋｉｎｇ（切抜き）の各工程順に処理して成形する。
【００５７】
又、各態様のプラグ部材と嵌合する蓋部材の開口端縁部曲面形状の折曲加工方法についてその好適態様の工程順を、プラグ部材が樹脂製で、その嵌合封止面が蓋の中心方向に向いている図７に示した容器蓋の場合を図１８に、プラグ部材が樹脂製で、その嵌合封止面が蓋の外周縁方向に向いている図８の容器蓋の場合を図１９に、及び、プラグ部材がメタル製で、その嵌合封止面が蓋の中心方向に向いている図９の容器蓋の場合を図２０に、プラグ部材がメタル製で、その嵌合封止面が蓋の外周縁方向に向いている図１０容器蓋の場合を図２１に夫々示した。
【００５８】
【発明の効果】
上述したとおり、本発明の容器蓋は、従来の易開封性容器蓋には無い一度開封された容器の開口リシール性を備え、然も未開封、既開封の識別も容易に出来る。
更に、本発明の蓋を使用してなる易開封性容器は従来品容器に比べて、易開封性、耐圧、落下強度特性、及び衛生的にも優れる。
然も、全体としてその形状が扁平で上下方向に高い凹凸が無いため本発明の蓋を同時に多数積み上げても比較的安定で所謂積載スタック性にも優れる等数多くの利点を有する。
【図面の簡単な説明】
【図１】本発明の容器蓋の主要構成部材を示す斜視図。
【図２】図１の容器蓋が完成後開封された状態を示す斜視図。
【図３】本発明の他の態様の容器蓋の主要構成部材を示す斜視図。
【図４】図３の容器蓋の完成後未開封状態の断面構造を示す斜視図。
【図５】図４の容器蓋断面の一部を拡大した図。
【図６】本発明の蓋部材の樹脂被覆による開口端縁部処理の一例を示す模式断面図。
【図７】樹脂プラグを用いた本発明の容器蓋の一例を示す図、（ａ）は平面図、（ｂ）は断面図、（ｃ）は部分拡大図。
【図８】樹脂プラグを用いた本発明の容器蓋の他の一例を示す図、（ａ）は平面図、（ｂ）は断面図、（ｃ）は部分拡大図。
【図９】メタルプラグを用いた本発明の容器蓋の一例を示す図、（ａ）は平面図、（ｂ）は断面図、（ｃ）は部分拡大図。
【図１０】メタルプラグを用いた本発明の容器蓋の他の一例を示す図、（ａ）は平面図、（ｂ）は断面図、（ｃ）は部分拡大図。
【図１１】本発明の樹脂プラグを用いた容器蓋の製作法を説明するための工程図。
【図１２】本発明の樹脂プラグを用いた容器蓋の他の製作法を説明するための工程図。
【図１３】本発明の樹脂プラグを用いた容器蓋の別の製作法を説明するための工程図。
【図１４】本発明の樹脂プラグを用いた容器蓋の更に別の製作法を説明するための工程図。
【図１５】本発明のメタルプラグを用いた容器蓋の製作法を説明するための工程図。
【図１６】本発明のメタルプラグを用いた容器蓋の他の製作法を説明するための工程図。
【図１７】本発明の可撓性タブ部材の製作法を説明するための工程図。
【図１８】本発明の容器蓋開口端縁部の折曲げによる処理法を説明するための工程図（樹脂プラグ）。
【図１９】本発明の容器蓋開口端縁部の折曲げによる別の処理法を説明するための工程図（樹脂プラグ）。
【図２０】本発明の容器蓋開口端縁部の折曲げによる処理法を説明するための工程図（メタルプラグ）。
【図２１】本発明の容器蓋開口端縁部の折曲げによる処理法を説明するための工程図（メタルプラグ）。
【符号の説明】
１、１’ 蓋部材
１ａ、１ａ’ 開口部
１ｃ、１ｃ’ カール部（蓋部材）
１ｈ，１ｉ、１ｇ’ 開口部端縁
２、２’ 開封用タブ
２ａ、２ａ’ 可撓性タブ部材
２ｂ、２ｂ’ プラグ部材
２ｃ カール部（可撓性タブ部材）
２ｃ’ 切欠部
２ｄ、２ｄ’ プラグ接着面
２ｅ、２ｅ’ つまみ
２ｆ、２ｆ’ 開封開始端部
２ｉ 可撓性タブ部材端縁
Ａ、Ｂ 接着部
Ｃ 嵌合封止部[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention provides an easily-openable container lid and a method for manufacturing the same, and in particular, includes a partially open-type container lid, which is capable of provisionally resealing such as temporarily resealing the once-opened opening again. And a method of manufacturing the same.
[0002]
[Prior art]
Easy-open container lids (easy-open lids) are widely used as food container lids for food cans, beverage cans, and the like, including beverage cans containing various drinks such as cola, beer, and juice. There are partial open type container lids mainly used for can lids, and full open type container lids mainly used for can lids of food cans such as canned foods, instant noodles, and snacks.
[0003]
In addition, the partially open type container lid has a pull-top tab type in which the easily breakable opening piece is completely separated from the container lid by peeling and opening, and a part of the easily breakable opening piece is connected to the container lid. There is a stay-on tub type in which the rupture opening piece is not separated from the container lid even after being opened by being pushed into the container.
[0004]
However, the so-called pull-top tab type, in which the opening piece is completely separated from the container lid, has a sharp fractured surface, etc. If discarded carelessly, it may touch or cause unexpected harm to infants, etc., and if scattered in nature, it may damage fish, birds, animals, etc. In this case, a stay-on tub type having no problem as described above is increasingly used.
[0005]
Such a container lid is strongly required to have an internal pressure resistance and a corrosion resistance, especially no elution into the contents, depending on the properties of the contents as well as the ease of opening and sealing.
For this reason, conventionally, a lid body made of a laminated material in which a non-elutable resin is coated on a base material such as a metal foil or a resin thin plate, and a high-strength, highly flexible, and highly corrosion-resistant laminated material, Tabs are often used.
[0006]
For example,
[0007]
Further, in
[0008]
[Patent Document 1]
JP-A-11-011526
[Patent Document 2]
Japanese Patent Publication No. 60-1216
[0009]
[Problems to be solved by the invention]
However, in the very recent days when the partially open type stained tub container lid became popular, the inside of the container was made to have a resealing property, and to temporarily temporarily fix the opening once opened again. There has been an urgent need to provide an easily-openable container lid that can be resealed temporarily or retorted with the lid still attached.
However, easy-open containers are basically disposable one-time use in principle, and can be opened only once, and resealing (resealing) of the container lid opening after opening has not been considered in the past. It's not too much to say.
[0010]
In fact, as far as the present inventor has investigated, it has been impossible to find any proposal of an easily-openable container lid for the purpose of resealing the opening once opened.
Of course, in order to reseal the container lid substantially without leakage and safely and reliably, at the time of reseal, a certain degree of opening sealing property is required, and further, at least once, the lid is reopened and then resealed. It is particularly important from the standpoint of mischief, crime prevention, etc. to be able to easily identify a lid that has not yet been opened and to easily obtain a guarantee that the contents of the can have not been altered without your knowledge. .
[0011]
In the conventional resin-coated metal foil tab or unsealed piece described above, when resealing using the same, almost no sealing property can be obtained, or even if the sealing property at the time of resealing is obtained, the unsealing is performed. The above-mentioned object cannot be sufficiently achieved because it is difficult to identify the unopened package.
[0012]
The present inventors have conducted intensive studies to solve the above-mentioned problems, and as a result, the resealability is sufficiently improved by providing a plug member that can be fitted into the opening of the lid to the opening tab as an opening piece. The present inventors have found that it is possible to easily identify whether the package has been opened or unopened, and have completed the present invention based on the findings.
[0013]
Accordingly, an object of the present invention is to provide an easily-openable container lid having a resealability, particularly a container lid with a stay-on-tab of a partially open type, and provisionally reseal the once-opened opening. An object of the present invention is to provide an easily-openable container lid having resealing properties of an opening that can be repeatedly stopped and having resealability that is remarkably superior to that of a form in which an opening is covered only with a resin-coated tab.
[0014]
Another object of the present invention is to ensure that the lid, which has been opened at least once and then resealed and the lid that has not yet been opened, can be easily identified and that the individual can contents have not been changed without your knowledge. An object of the present invention is to provide an easily-openable container lid which can be easily obtained.
Another object of the present invention is to provide a container lid capable of forming an easily-openable container having significantly improved pressure resistance and drop strength compared to conventional products.
Still another object of the present invention is to provide a container lid in which the adhesion area around the opening can be reduced, so that the easy-open property is significantly improved.
[0015]
Still another object of the present invention is to provide an easily-openable container lid excellent in hygiene because the opening piece does not enter the can like a conventional container lid with a stay-on-tab.
Still another object of the present invention is to provide a method for producing the easy-open container lid having the above-mentioned resealability.
[0016]
[Means for Solving the Problems]
ADVANTAGE OF THE INVENTION According to this invention, it is easy to comprise a lid member provided with the opening formed beforehand, and the opening tab which covers the said opening on the outer surface side of this lid | cover member, and was provided so that it may hermetically adhere around the opening. In the openable container lid,
The opening tab includes a flexible tab member and a plug member that is adhered to and integrated with the tab member and that is formed so as to fit into the opening of the lid member, and the flexible tab member is An easily-openable container lid having resealability, which is tightly fixed so as to be peelable around the opening of the lid member.
[0017]
In the easy-open container lid of the present invention, the opening tab (opening piece) is formed of a flexible tab member portion and a plug member portion, and the plug member is formed in a shape fitting into the opening of the lid member. It is a remarkable structural feature that the flexible tab member is hermetically sealed so as to be peelable around the opening of the lid member.
[0018]
Since the opening tab has the specific structure described above, the easily-openable container lid of the present invention can be provisionally resealed any number of times simply by pushing the plug into the opening even after opening once, and the conventional resin. It shows remarkably superior resealability as compared with the case where the opening is covered only with the film-coated metal foil tab (tape tab).
Of course, the opening area is improved because the bonding area at the opening portion is a small area only at the periphery of the opening and the bonding strength can be relatively small.
[0019]
Furthermore, the lid once opened and then resealed and the unopened lid can be easily distinguished from the shape in their respective states, and it is easy to assure that the contents of the individual cans have not been changed without your knowledge. Can be
Furthermore, with the specific configuration of the easily-openable container lid, the pressure resistance and drop strength of the container are significantly improved as compared with the conventional one.
[0020]
In the container lid of the present invention, in the case where the opening edge of the lid member is bent to the outside of the lid, or curled, or edge-treated by resin coating, the opening edge after opening is It is not sharp and is protected from corrosion and the like.
Of course, the fitting of the opening tab with the plug member is good, and the plug member is not damaged even if resealing is repeated.
[0021]
As the flexible tab member, a member made of a laminate in which a resin film is formed on both surfaces of a metal foil is preferable from the viewpoint of the balance between the tensile strength and flexibility at the time of tab tearing and the corrosion resistance.
[0022]
It is preferable that the lid member is a metal member having a winding-processed portion on the periphery.
The outer surface side of the lid member has thermal adhesion to at least the flexible tab member, and the inner surface side is non-adhesive to the flexible tab member and the plug member. It is particularly desirable from the viewpoint of ensuring both adhesion to the plug member and non-elution to the contents.
Further, in the case where the opening tab is, in addition to the flexible tab member, the plug member is also adhered to the periphery of the opening of the lid member, particularly under severe conditions such as high temperature and impact. It is more preferable from the viewpoint of ensuring the tightness of the exposed container.
[0023]
The opening tab has a portion that is located on the opposite side of the opening from the opening start end and sandwiches the opening and is difficult to be detached and adheres to the lid member, and the opening tab does not detach from the lid member even after opening. The container lid, particularly a container lid configuration having a shape immediately before the portion attached to the lid member and having a shape in which both sides are cut off in a direction substantially perpendicular to the peeling direction and the tab width of the portion is narrowed, This is preferable because the peeling easily stops.
The plug member is preferably a resin plug member formed by injection molding or compression molding or a metal plug member formed by press molding.
[0024]
The present invention is also a method for producing an easily-openable container lid having the resealability of the present invention, wherein a step of performing an edge treatment of the opening of a lid member having a preformed opening, A step of forming an opening tab by integrating a flexible tab member and a plug member, applying the opening tab to a surface to be an outer surface side of the lid member, and forming a flexible tab member and a lid member around an opening. Bonding the outer surface of the container.
Further, the manufacturing method of the aspect in which the opening tab is integrally formed by injection molding or compression molding of the plug member on the flexible tab member is particularly preferable from the viewpoint that the opening tab shape of the present invention can be formed accurately and efficiently. preferable.
[0025]
Further, the present invention provides a step of treating an edge of the opening of a lid member having a preformed opening, a step of molding a flexible tab member and a plug member, respectively, and an outer surface side of the lid member. The flexible tab member and the plug member are mounted on the outer surface of the lid member such that the plug member fits into the opening of the lid member, and the plug member is covered by the flexible tab member. Bonding the flexible tab member and the plug member together to form an opening tab, and simultaneously bonding a flexible tab member to the outer surface of the lid member. I do.
[0026]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an easily-openable container lid having resealability and a method of manufacturing the same according to the present invention will be described in detail with reference to the drawings.
[0027]
FIGS. 1 to 4 are perspective views for explaining the entire configuration of the easily-openable container lid of the present invention. FIG. 1 shows main components of the container lid before being assembled, and FIG. Indicates a state where the container lid is opened.
FIG. 3 shows the same main components before assembling the container lid of the present invention, which are the same as the container lids shown in FIGS. 1 and 2 except for a part of the member shape, and FIG. 3 shows a cross-sectional structure of the lid in the state.
[0028]
As is clear from FIGS. 1 and 2, the container lid of the present invention comprises a
The
The
[0029]
In this container lid, the
In addition, the
[0030]
These three curl shapes are also provided at corresponding positions on the
Thereby, the
[0031]
The container lid shown in FIGS. 3 and 4 includes a
Also in this container lid, the
However, the container lid is not provided with the curl of the container shown in FIGS. 1 and 2, and the bonding portion between the lid member 1 'and the
Instead, in the container lid of FIGS. 3 and 4, the
[0032]
In order to open the easily-openable container lid of the present invention, the tab 2 (2 ') of the opening tab 2 (2') is gripped with a finger and the tab 2 (2 ') is opened at the opening start end. 2f (2f '), pulling it toward the near side, peeling off the opening 1a (1a') of the lid member 1 (1 '), and fixing the tab 2 (2') and the lid 1 (1 ') together. Stop before the part.
Also, for resealing after opening once, the plug is re-fitted into the opening by pressing the upper surface of the bonding portion 2d (2d ') of the
[0033]
An important feature of the container lid of the present invention resides in that a plug member shaped to fit into the opening is attached to the opening tab.
Since the plug member is slightly thick, elastic repulsion force at the time of reseal is strong, and reseal sealing property which is remarkably superior to that of the conventional case where the opening is covered only with the tape tab is shown.
[0034]
The plug member of the present invention is not necessarily limited to this, but a resin plug and a metal plug can be preferably used.
[0035]
Resin plugs that are flexible and rich in sealing elasticity, and can be resealed more often, for containers used at relatively low temperatures, containers containing corrosive contents, especially containers that do not require high pressure resistance. It is preferable to use high-strength and high-temperature resistant containers for containers that are exposed to particularly high temperatures such as hot filling and retort treatment, containers that require particularly high pressure resistance, or containers with a limited plug member thickness. The use of good metal or resin-coated metal plugs is preferred.
In the case of a resin plug, it is important that the dissolution into the content is low, and in the case of a metal plug, it is important that the content has corrosion resistance to the content.
[0036]
Polyolefin resins such as polypropylene and high-density polyethylene, polyesters such as polyethylene terephthalate (PET), polybutylene terephthalate (PBT), and polyethylene terephthalate isophthalate; 6 nylon; Examples thereof include polyamides such as nylon and a blend composition thereof.
[0037]
Examples of the metal material used for the metal plug include aluminum, steel, and the like. In the case of a laminated metal plug, at least the component side of the member that is in contact with the flexible tab member is a component material of the member. It is necessary to use, for example, polypropylene or the like, and the surface side in contact with the lid member has excellent sealing performance for fitting to the opening end of the lid and has a protective effect on the contents, for example, polyester. , Polyamide and the like are preferred.
[0038]
When the plug member is made of a resin, examples of the molding method include injection molding and compression molding, and the bonding with the flexible tab member is appropriately performed by bonding according to each material. Adhesion with an agent or thermal adhesion may be used.
[0039]
On the other hand, in the case of a metal plug member, press molding or the like is used.
Also, it can be formed simultaneously by insert molding when manufacturing the opening tab.
The constituent material of the flexible tab member to which the plug member is adhered is an opening piece or a tab constituent material usually used for this type of container lid, and is not necessarily limited to a material that can be joined to the plug material. Although not limited, those made of a laminate in which a resin film is formed on both surfaces of a metal foil are particularly preferable in terms of balance between tensile strength and flexibility at the time of tab tearing and corrosion resistance.
[0040]
A specific preferred example of such a laminated material is a laminated material in which PET is laminated on one side of an aluminum foil and PP is laminated on the other side.
[0041]
Next, the cover member of the present invention will be described in more detail.
In the lid member of the present invention, for example, the edge of the opening is directed toward the outside of the lid member as shown by reference numeral 1g ′ in FIG. 5, which is an enlarged sectional view of the edge of the opening of the lid member in FIG. It is bent into a smooth curved surface, or is curled at the edge, or as shown in FIG. 6, is coated with a resin such as PET, PP, etc. to form a smooth curved shape without sharp corners. That is, even if the edge of the lid body after opening is smooth and inadvertently touches this part, there is no danger of damage such as cuts, and it is protected from corrosion etc. In addition, since the fitting of the opening tab with the plug member is good, the plug member is not damaged even if resealing is repeated.
Further, it is more preferable that the lid member has a winding-processed portion at a peripheral portion thereof so as to be able to be hermetically bonded to the can body by the winding process.
[0042]
Further, the outer surface of the lid member has at least the heat-adhesive property with the flexible tab member, and in the case of a mode in which a plug is also bonded, it is preferable that the plug member also has the heat-adhesive property. It is particularly desirable that the side be non-adhesive to the flexible tab member and the plug member from the viewpoint of ensuring both close contact with the flexible tab member and the plug member and non-elution to the contents.
[0043]
Hereinafter, various specific examples will be given with respect to the bonding state of the opening edge of the lid member and the flexible tab member of the opening tab and the fitting state of the plug member in the container lid of the present invention. This will be described in detail.
[0044]
FIG. 7 is a plan view (a), a cross-sectional view (b) showing an example of a container lid (unopened) of the present invention when a resin plug is used, and a bonding portion between an opening edge and a flexible tab member; FIG. 7C is a partially enlarged view (c) for explaining a manner of fitting and sealing the opening edge and the plug member.
In the container lid of FIG. 7, the opening edge 1i is bent toward the outer surface side (upper side in the figure) of the
In the fitting in this mode, the sealing is maintained mainly by the radial repulsive elastic force of the resin plug member.
In the container lid of this figure, the
[0045]
FIG. 8 is a plan view (a) sectional view (b) and a partially enlarged view (c) showing another example of the container lid of the present invention similarly using a resin plug. The fitting portion (sealing portion) of 1i is indicated by reference numeral C, and its surface faces the peripheral direction of the lid.
The
In the fitting in this mode, even when the container lid is heated, the plug in the portion sandwiched between the edge of the
[0046]
FIG. 9 is a plan view (a), a sectional view (b), and a partially enlarged view (c) showing an example of the container lid of the present invention when a metal plug is used.
In the container lid of FIG. 9, the opening edge 1 i is bent toward the outside (upward) of the
In the container lid shown in this figure, the
[0047]
On the other hand, FIG. 10 is a plan view (a) cross-sectional view (b) and a partially enlarged view (c) of another example of the container lid using a metal plug. The fitting sealing surface 1i (portion C) faces the peripheral direction of the lid.
The lid member is bonded to the flexible tab member at the portion A.
[0048]
As a method of manufacturing the above-mentioned easily-openable container lid of the present invention, the plug member is made of resin, and the fitting and sealing surface faces the outer peripheral edge of the lid. For example, the method shown in the assembly process diagram and FIG. 11 can be exemplified.
[0049]
That is, in this manufacturing method, first, the opening edge 1i of the
[0050]
On the other hand, the material (PET / Al / PP laminated sheet) of the
A resin (PET) for forming the
[0051]
Next, the
After the bonding is completed, a finishing process such as edge processing of the
[0052]
FIG. 12 is an assembling process diagram showing another manufacturing method of the resin plug container lid of the same embodiment as that of FIG. 11. The method of FIG. 11 is different from the injection injection molding of the
[0053]
FIG. 13 is an assembling process diagram showing still another manufacturing method of the resin plug container lid having the same mode as that of FIG. 11. In this method, the insert injection molding of the
FIG. 14 is also an assembling process diagram showing still another manufacturing method of the resin plug container lid in the same mode as FIG. 11. In this method, the processing of the opening edge 1i of the
Further, in the case of the container lid of the embodiment shown in FIG. 9 in which the plug member is made of metal and the fitting sealing surface faces the center direction of the lid, for example, it is manufactured by the method illustrated in the assembly process diagram and FIG. You can do it.
[0054]
That is, in this method, the opening edge 1i of the lid member 1 (end molding), the
[0055]
FIG. 16 is an assembly process diagram showing another manufacturing method of the metal plug container lid in the same mode as FIG. 15. In this method, the opening edge 1i and the
[0056]
Further, in order to form the flexible tab member of the opening tab of the present invention from a material sheet such as a laminated sheet, for example, as shown in FIG. Blanking (piercing), second step; Blanking (progressing cutting), third step; Paneling (extending), fourth step; Curling (bending and shrinking), fifth step; Blanking (cutting). Process and mold in the order of the steps.
[0057]
Further, regarding the bending method of the curved surface shape of the opening edge of the lid member to be fitted with the plug member of each aspect, the process order of the preferred aspect is as follows. FIG. 18 shows the case of the container lid shown in FIG. 7 facing in the center direction, and FIG. 18 shows the case of the container lid of FIG. 8 in which the plug member is made of resin and the fitting sealing surface faces the outer peripheral edge of the lid. FIG. 19, and FIG. 20 shows the case of the container lid of FIG. 9 in which the plug member is made of metal and the fitting sealing surface faces the center direction of the lid, and FIG. FIG. 21 shows the case of the container lid shown in FIG. 10 in which the sealing surface faces the outer peripheral edge direction of the lid.
[0058]
【The invention's effect】
As described above, the container lid of the present invention has the resealability of a once-opened container which is not provided in the conventional easy-open container lid, and it is easy to distinguish between unopened and already opened containers.
Further, the easily-openable container using the lid of the present invention is excellent in easy-opening property, pressure resistance, drop strength characteristics, and sanitation as compared with the conventional container.
Needless to say, since the overall shape is flat and there are no high irregularities in the vertical direction, even if many lids of the present invention are stacked at the same time, there are many advantages such as being relatively stable and having excellent so-called stacking properties.
[Brief description of the drawings]
FIG. 1 is a perspective view showing main components of a container lid of the present invention.
FIG. 2 is a perspective view showing a state where the container lid of FIG. 1 is opened after completion.
FIG. 3 is a perspective view showing main components of a container lid according to another embodiment of the present invention.
FIG. 4 is a perspective view showing a sectional structure of the container lid of FIG. 3 in an unopened state after completion.
FIG. 5 is an enlarged view of a part of the cross section of the container lid of FIG. 4;
FIG. 6 is a schematic cross-sectional view showing an example of an opening edge processing by a resin coating of a lid member of the present invention.
FIG. 7 is a view showing an example of a container lid of the present invention using a resin plug, (a) is a plan view, (b) is a sectional view, and (c) is a partially enlarged view.
FIG. 8 is a view showing another example of the container lid of the present invention using a resin plug, (a) is a plan view, (b) is a sectional view, and (c) is a partially enlarged view.
FIG. 9 is a view showing an example of a container lid of the present invention using a metal plug, (a) is a plan view, (b) is a sectional view, and (c) is a partially enlarged view.
FIG. 10 is a view showing another example of the container lid of the present invention using a metal plug, (a) is a plan view, (b) is a sectional view, and (c) is a partially enlarged view.
FIG. 11 is a process chart for explaining a method of manufacturing a container lid using the resin plug of the present invention.
FIG. 12 is a process chart for explaining another method for manufacturing a container lid using the resin plug of the present invention.
FIG. 13 is a process chart for explaining another method for manufacturing a container lid using the resin plug of the present invention.
FIG. 14 is a process chart for explaining still another manufacturing method of the container lid using the resin plug of the present invention.
FIG. 15 is a process chart for explaining a method of manufacturing a container lid using the metal plug of the present invention.
FIG. 16 is a process chart for explaining another method of manufacturing the container lid using the metal plug of the present invention.
FIG. 17 is a process chart for explaining a method of manufacturing the flexible tab member of the present invention.
FIG. 18 is a process diagram (resin plug) for describing a processing method by bending the edge of the container lid opening according to the present invention.
FIG. 19 is a process diagram (resin plug) for explaining another processing method by bending the edge of the container lid opening according to the present invention.
FIG. 20 is a process diagram (metal plug) for describing a processing method by bending the edge of the container lid opening according to the present invention.
FIG. 21 is a process diagram (metal plug) for describing a processing method by bending the edge of the container lid opening according to the present invention.
[Explanation of symbols]
1, 1 'lid member
1a, 1a 'opening
1c, 1c 'Curled portion (lid member)
1h, 1i, 1g 'Opening edge
2, 2 'opening tab
2a, 2a 'Flexible tab member
2b, 2b 'plug member
2c Curl part (flexible tab member)
2c 'notch
2d, 2d 'plug bonding surface
2e, 2e 'knob
2f, 2f 'Opening start end
2i Flexible tab member edge
A, B bonded part
C mating seal
Claims (12)
前記開封用タブは、可撓性タブ部材と該タブ部材に接着一体化すると共に前記蓋部材の開口部に嵌合可能に形成されたプラグ部材とから成り、且つ、前記可撓性タブ部材が、前記蓋部材開口周辺部で引剥し可能に密着固定されていることを特徴とするリシール性を備えた易開封性容器蓋。An easy-open container lid comprising: a lid member having an opening formed in advance; and an opening tab provided on the outer surface side of the lid member so as to cover the opening and hermetically seal around the opening. And
The opening tab includes a flexible tab member and a plug member that is adhered to and integrated with the tab member and that is formed so as to fit into the opening of the lid member, and the flexible tab member is An easily openable container lid having resealability, wherein the lid is removably adhered and fixed around the opening of the lid member.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003015840A JP4273773B2 (en) | 2003-01-24 | 2003-01-24 | Manufacturing method of easy-open container lid with resealability |
| PCT/JP2004/000571 WO2004065241A1 (en) | 2003-01-24 | 2004-01-23 | Easily openable container lid with resealability and method of producing the same |
| US10/542,988 US20060201944A1 (en) | 2003-01-24 | 2004-01-23 | Easily openable container lid with resealability and method of producing the same |
| KR1020057013603A KR100951133B1 (en) | 2003-01-24 | 2004-01-23 | Easily openable container lid with resealability and method of producing the same |
| EP04704727A EP1607341A4 (en) | 2003-01-24 | 2004-01-23 | Easily openable container lid with resealability and method of producing the same |
| CNB2004800080513A CN100532217C (en) | 2003-01-24 | 2004-01-23 | Easily openable container lid with resealability and method of producing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003015840A JP4273773B2 (en) | 2003-01-24 | 2003-01-24 | Manufacturing method of easy-open container lid with resealability |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2008156948A Division JP4807381B2 (en) | 2008-06-16 | 2008-06-16 | Easy-to-open container lid with resealability and method for producing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2004262466A true JP2004262466A (en) | 2004-09-24 |
| JP4273773B2 JP4273773B2 (en) | 2009-06-03 |
Family
ID=33111952
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2003015840A Expired - Lifetime JP4273773B2 (en) | 2003-01-24 | 2003-01-24 | Manufacturing method of easy-open container lid with resealability |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4273773B2 (en) |
| CN (1) | CN100532217C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2008514511A (en) * | 2004-09-28 | 2008-05-08 | ボール パッケージング ヨーロッパ ゲーエムベーハー | Sheet metal lid for beverage cans with large perforations |
| JP2015151152A (en) * | 2014-02-13 | 2015-08-24 | 東洋製罐グループホールディングス株式会社 | Opening mechanism of easily openable container |
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| BR112012025469B1 (en) | 2010-04-06 | 2020-04-07 | C2C Beteiligungs Gmbh | closure device for container and container with a closure of this kind |
| CN104352131A (en) * | 2014-10-24 | 2015-02-18 | 曼盛包装（上海）有限公司 | In-mold labeled injection-molded thin film plastic cup |
| KR20180098249A (en) * | 2015-12-25 | 2018-09-03 | 이와사키 고교 가부시키가이샤 | Food container and manufacturing method thereof |
| DE102016103801A1 (en) * | 2016-03-03 | 2017-09-07 | Gregor Anton Piech | Can lid recloseable |
| EP3279105A1 (en) * | 2016-08-02 | 2018-02-07 | Amcor Flexibles Singen GmbH | Cover ring |
| EP3584191A1 (en) * | 2018-06-19 | 2019-12-25 | Top Cap Holding GmbH | Metallic can lid |
| HUE061227T2 (en) | 2018-06-19 | 2023-05-28 | Top Cap Holding Gmbh | Method of manufacturing a metallic can lid |
| CN109956132A (en) * | 2019-04-21 | 2019-07-02 | 徐灵怡 | Pop can with anti-function of spraying and spoiling over |
| KR20220038071A (en) * | 2019-07-30 | 2022-03-25 | 기쿠오 야마다 | cover body |
-
2003
- 2003-01-24 JP JP2003015840A patent/JP4273773B2/en not_active Expired - Lifetime
-
2004
- 2004-01-23 CN CNB2004800080513A patent/CN100532217C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008514511A (en) * | 2004-09-28 | 2008-05-08 | ボール パッケージング ヨーロッパ ゲーエムベーハー | Sheet metal lid for beverage cans with large perforations |
| JP2015151152A (en) * | 2014-02-13 | 2015-08-24 | 東洋製罐グループホールディングス株式会社 | Opening mechanism of easily openable container |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100532217C (en) | 2009-08-26 |
| JP4273773B2 (en) | 2009-06-03 |
| CN1764576A (en) | 2006-04-26 |
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