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JP5626789B2 - Resealable opening device for paper containers - Google Patents

Resealable opening device for paper containers Download PDF

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Publication number
JP5626789B2
JP5626789B2 JP2010283220A JP2010283220A JP5626789B2 JP 5626789 B2 JP5626789 B2 JP 5626789B2 JP 2010283220 A JP2010283220 A JP 2010283220A JP 2010283220 A JP2010283220 A JP 2010283220A JP 5626789 B2 JP5626789 B2 JP 5626789B2
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opening
top surface
inner cylinder
paper container
elbow
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JP2012131515A (en
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佐川 大輔
大輔 佐川
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日本テトラパック株式会社
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Description

本発明は内容液を充填する紙容器の再封性開封装置に関し、詳しくは紙容器を開封して液体食品を注出し、且つ簡易的に再封できるコストの安い再封性開封装置に関する。 The present invention relates to a resealable opening device for a paper container filled with a content liquid, and more particularly, to a low-cost resealing device that can easily re-seal liquid food by opening the paper container.

従来、内容液が略1リットルを超えるような大型の紙容器は一度開封すると内容液を使い切るか或いは別の容器に内容液を移す必要があるので、その目的に沿った開封再栓装置が求められていた。これを解決する紙容器の開封再栓装置に関する従来技術として特許文献1、2に掲載の内容が知られている。以下に特許文献1を用いてその説明をする。 Conventionally, once a large paper container whose content liquid exceeds approximately 1 liter is opened, it is necessary to use up the content liquid or transfer the content liquid to another container. It was done. The contents described in Patent Documents 1 and 2 are known as conventional techniques related to a paper container opening and closing device for solving this problem. This will be described below with reference to Patent Document 1.

図8に示すように、開封再栓装置21は、封止用フィルム24で閉塞された紙容器の頂面22の開口部22Aの周縁部に沿ってベース部25が接着され、このベース部25にリテーナ26が内螺合され、リテーナ26の上部にスクリューキャップ27が外螺合される。リテーナ26の内面は頂面22に対して垂直な円筒形で下端には封止用フィルム24を突き破るための尖端部26Cが形成され、リテーナ26とスクリューキャップ27は溶着部28にてスポット溶接される。 As shown in FIG. 8, the opening / sealing device 21 has a base portion 25 bonded along the peripheral edge portion of the opening portion 22 </ b> A of the top surface 22 of the paper container closed with the sealing film 24. The retainer 26 is internally screwed, and the screw cap 27 is externally screwed onto the upper portion of the retainer 26. The inner surface of the retainer 26 has a cylindrical shape perpendicular to the top surface 22, and a tip end portion 26 </ b> C for breaking through the sealing film 24 is formed at the lower end. The retainer 26 and the screw cap 27 are spot-welded at the weld portion 28. The

スクリューキャップ27を取り外す方向Fに回転すると、キャップ27とリテーナ26が一体となりベース部25内を下降して封止用フィルム24を破る。さらに、溶着部28を破断してキャップ27が容易に外れる。紙容器はキャップ27で再栓できる。 When the screw cap 27 is rotated in the removing direction F, the cap 27 and the retainer 26 are united and lowered in the base portion 25 to break the sealing film 24. Further, the welded portion 28 is broken and the cap 27 is easily removed. The paper container can be recapped with the cap 27.

特開平11−349024号公報Japanese Patent Application Laid-Open No. 11-349024 特開2001−106248号公報JP 2001-106248 A

従来の開封再栓装置21は螺合構造が複雑でコストが高い。さらに、図9に示すように、この開封再栓装置21を屋根型の紙容器30に取付けた場合に、キャップ27を取外して内容液Wをリテーナ26から注出する際に、リテーナ26の端部Yに達した内容液W1が、稀に、リテーナ26から内容液W2が不用意にこぼれることがあるという問題があった。 The conventional opening and closing device 21 has a complicated screwing structure and is expensive. Further, as shown in FIG. 9, when the unsealing / repealing device 21 is attached to the roof-type paper container 30, the end of the retainer 26 is removed when the cap 27 is removed and the content liquid W is poured out from the retainer 26. The content liquid W1 that has reached the portion Y rarely spills from the retainer 26 in some cases.

そこで、本発明はかかる従来技術の問題に鑑みなされたものであって、簡単な構造で開封及び再栓が容易でコストが安く内容液がこぼれにくい紙容器の開封再栓装置を提供することを目的とする。 Therefore, the present invention has been made in view of the problems of the prior art, and it is intended to provide an opening / reopening device for a paper container that is easy to open and reopen with a simple structure, is low in cost, and does not easily spill liquid contents. Objective.

請求項1の発明は、紙基材を折り曲げて屋根型形状の頂面と底面と複数側面から成る紙容器本体の、屋根型形状の前記頂面の傾斜面に設けられる開封再栓装置であって、前記開封再栓装置は前記頂面に形成された内容液注出用の開口予定部を覆って前記頂面に固着される断面円形でエルボ状の外筒部と、前記外筒部の内面を摺動する断面円形のエルボ状の内筒部と、前記内筒部の一端部の周縁部を開閉自在に覆う蓋部と、前記内筒部の他端部に前記開口予定部を破断する破断刃とを備え、前記外筒部と前記内筒部は、屋根型形状の前記頂面の前記傾斜面の上方側に向かって湾曲するエルボ状であり、前記内筒部と前記蓋部はヒンジを介して連結され、前記破断刃は、前記ヒンジの近傍領域には形成されていない ことを特徴としている。 The invention of claim 1 is an unsealing and re-sealing device provided on an inclined surface of the top surface of the roof shape of a paper container main body comprising a top surface, a bottom surface, and a plurality of side surfaces of a roof shape by folding a paper base material. Te, wherein the opening re plug device and the outer cylindrical portion elbow shaped circular section which is secured to said top surface to cover the opening portions to be for pouring the contents liquid formed on the top surface, of the outer cylindrical portion An elbow-shaped inner cylinder portion having a circular cross section that slides on the inner surface, a lid portion that covers the peripheral edge portion of one end portion of the inner cylinder portion so as to be freely opened and closed, and the planned opening portion is broken at the other end portion of the inner cylinder portion The outer cylinder part and the inner cylinder part are elbow-shaped curved toward the upper side of the inclined surface of the top surface of the roof shape, and the inner cylinder part and the lid part Are connected via a hinge, and the breaking blade is not formed in the vicinity of the hinge .

請求項1の発明によれば、前記開封再栓装置は前記頂面に形成された内容液注出用の開口予定部を覆って前記頂面に固着される断面円形でエルボ状の外筒部とエルボ状の内筒部とから成る簡単な構造なので製作コストが安い。そして、内筒部が外筒部の内面を摺動するだけで前記内筒部の他端部に備える破断刃によって前記開口予定部を容易に破断できて、開封した開口予定部から内容液を容易且つスムーズに注出することができる。また、内容液の注出を中断する場合は蓋部で前記内筒部の一端部を覆うことにより開口部を容易に簡易再封できるので紙容器の利便性と品質性が向上する。前記蓋部は前記内筒部にヒンジを介して連結されるので、前記蓋部はこのヒンジによって安定して前記内筒部の一端部を開閉することができる。また、前記蓋部を紛失することがなく、前記蓋部はワンタッチで容易に開閉できて簡易密封されるので確実に再栓効果が得られる。前記頂面は傾斜面で、前記外筒部と前記内筒部は前記傾斜面の上方側に向かって湾曲するエルボ状であるので、内容液を注出する際にエルボ状の内筒部は傾斜面の上方側に向かって湾曲して開口する状態である。このため、内筒部が円筒形状で傾斜面に垂直に設けられる場合に比べると内容液がこぼれ難いので使い勝手が良くなり紙容器としての品質性が向上する。前記破断刃は前記ヒンジの近傍領域には形成されていないので、破断片がつながったままとなる。 According to the invention of claim 1, the unsealing and re-sealing device has a circular cross-section and an elbow-shaped outer cylinder portion that is fixed to the top surface so as to cover the planned opening portion for dispensing the content liquid formed on the top surface. Manufacturing cost is low because it is a simple structure consisting of an elbow-shaped inner cylinder. And, the inner cylinder part can be easily broken by the breaking blade provided at the other end of the inner cylinder part simply by sliding the inner surface of the outer cylinder part, and the liquid content can be removed from the opened opening planned part. It can be poured out easily and smoothly. In addition, when the dispensing of the content liquid is interrupted, the opening can be easily and easily resealed by covering the one end of the inner cylinder with the lid, so that the convenience and quality of the paper container are improved. Since the lid portion is connected to the inner cylinder portion via a hinge, the lid portion can stably open and close one end portion of the inner cylinder portion by the hinge. In addition, the lid portion is not lost, and the lid portion can be easily opened and closed with a single touch and is simply sealed, so that a replugging effect can be reliably obtained. The top surface is an inclined surface, and the outer tube portion and the inner tube portion are in an elbow shape that curves toward the upper side of the inclined surface. It is in a state of opening curvedly toward the upper side of the inclined surface. For this reason, compared with the case where the inner cylinder portion is cylindrical and provided perpendicular to the inclined surface, the liquid content is less likely to spill, so that it is easy to use and the quality as a paper container is improved. Since the breaking blade is not formed in the vicinity of the hinge, the broken piece remains connected.

本発明の実施形態における、屋根型の紙容器本体1aの開口予定部5を覆って開封再栓装置6を取付けた状態を示す紙容器1の斜視図である。It is a perspective view of the paper container 1 which shows the state which covered the opening opening part 5 of the roof-type paper container main body 1a in the embodiment of this invention, and attached the opening reclosing apparatus 6. FIG. 本発明の実施形態における、図1のA−A断面図で、開封再栓装置6の断面形状を示す図である。It is AA sectional drawing of FIG. 1 in embodiment of this invention, and is a figure which shows the cross-sectional shape of the opening reclosing apparatus 6. FIG. 本発明の実施形態における、図2の開口予定部5の状態を示す詳細断面図である。FIG. 3 is a detailed cross-sectional view showing a state of a planned opening portion 5 of FIG. 2 in the embodiment of the present invention. 本発明の実施形態における、紙容器1を開封するため開封再栓装置6の蓋部9を介して内筒部8を押込んで開口予定部5を開封した状態を示す斜視図である。It is a perspective view which shows the state which pushed the inner cylinder part 8 through the cover part 9 of the opening reopening apparatus 6 in order to open the paper container 1, and opened the opening scheduled part 5 in embodiment of this invention. 本発明の実施形態における、図4のB−B断面図で、開封再栓装置6の開口予定部5が開封した状態を示す斜視図である。It is a BB sectional view of Drawing 4 in an embodiment of the present invention, and is a perspective view showing the state where opening opening part 5 of opening re-plugging device 6 opened. 本発明の実施形態における、開口予定部5を開封した後に蓋9を開放して、注出口である内筒部8から内容液Qを注出するために紙容器1を傾ける状態を示す斜視図である。The perspective view which shows the state which inclines the paper container 1 in order to discharge | release the content liquid Q from the inner cylinder part 8 which is a spout after opening the lid | cover 9 after opening the opening scheduled part 5 in embodiment of this invention. It is. 本発明の実施形態における、内筒部8の一端部8aからから内容液Qを注出する状態を示す断面図である。It is sectional drawing which shows the state which pours out the content liquid Q from the one end part 8a of the inner cylinder part 8 in embodiment of this invention. 従来例における、封止用フィルム24で閉塞された開口部22Aに沿ってベース部25が固着され、このベース部25に内螺合されたリテーナ26の上部にスクリューキャップ27を外螺合して成る開封再栓装置21の状態を示す断面図である。In the conventional example, the base portion 25 is fixed along the opening 22A closed by the sealing film 24, and the screw cap 27 is externally screwed onto the upper portion of the retainer 26 that is internally screwed into the base portion 25. It is sectional drawing which shows the state of the opening recapping device 21 which consists. 従来例における、屋根型の紙容器本体30の開口部22Aを覆って開封再栓装置21を取付けた状態を示す断面図である。It is sectional drawing which shows the state which covered the opening part 22A of the roof-type paper container main body 30 in the prior art example, and attached the opening recapping device 21. FIG.

以下に、本発明の実施形態を図1〜図7に基づいて説明する。 Hereinafter, an embodiment of the present invention will be described with reference to FIGS.

<紙容器の開封再栓装置の構成>
図1、図2に示すように、紙容器1は包装材Pを折り曲げて、頂面2と、矩形の底面3と四側面4(正面4a、裏面4b、側面4c、側面4d)で紙容器本体1aを形成する。頂面2は屋根型形状で正面4a側の頂面2aにジュース等の内容液Qを注出するための円形の開口予定部5が形成され、この開口予定部5を覆って同芯状に開封再栓装置6を取付ける。
<Configuration of paper container opening and closing device>
As shown in FIGS. 1 and 2, the paper container 1 is formed by bending the packaging material P, so that the paper container has a top surface 2, a rectangular bottom surface 3, and four side surfaces 4 (front surface 4 a, back surface 4 b, side surface 4 c, side surface 4 d). A main body 1a is formed. The top surface 2 has a roof shape, and a circular opening planned portion 5 for pouring the content liquid Q such as juice is formed on the top surface 2a on the front surface 4a side, and covers the planned opening portion 5 and is concentric. Attach the opening and re-sealing device 6.

開封再栓装置6は頂面2aにフランジ7aを介して固着される断面円形のエルボ状の外筒部7と、この外筒部7の内面7bを摺動する断面円形のエルボ状の内筒部8から成る。そして、内筒部8の一端部8aの周縁部を開閉自在に覆う蓋部9を備え、蓋部9の内面9aに形成された凹状部9bに内筒部8の一端部8aが着脱自在に収納される。内筒部8の他端部8bは開口予定部5を破断する鋸刃状の破断刃10を備え、この他端部8bは開口予定部5と同じ直径Gの円形である。開封再栓装置6は樹脂材で射出成型される。 The unsealing device 6 includes an elbow-shaped outer cylinder portion 7 having a circular cross section that is fixed to the top surface 2a via a flange 7a, and an elbow-shaped inner cylinder having a circular shape that slides on the inner surface 7b of the outer cylinder portion 7. It consists of part 8. And the cover part 9 which covers the peripheral part of the one end part 8a of the inner cylinder part 8 so that opening and closing is possible is provided, and the one end part 8a of the inner cylinder part 8 is detachably attached to the concave part 9b formed in the inner surface 9a of the cover part 9. Stored. The other end portion 8 b of the inner cylinder portion 8 includes a saw blade-like breaking blade 10 that breaks the planned opening portion 5, and the other end portion 8 b is a circle having the same diameter G as the planned opening portion 5. The opening / sealing device 6 is injection-molded with a resin material.

なお、内筒部8と蓋部9は薄肉板状のヒンジ11を介して開閉自在に連結され、このヒンジ11は頂面2aの傾斜面の上方側に設けられる。蓋部9におけるヒンジ11の対面側には、指を用いて蓋部9を開閉容易とするための突起9cを備える。 In addition, the inner cylinder part 8 and the cover part 9 are connected so that opening and closing is possible via the thin-plate-shaped hinge 11, and this hinge 11 is provided above the inclined surface of the top surface 2a. On the facing side of the hinge 11 in the lid portion 9, a protrusion 9 c for easily opening and closing the lid portion 9 using a finger is provided.

開封再栓装置6を紙容器本体1aの頂面2aに取付ける方法は、図示しない装置でフランジ部7dの裏面をマイクロフレーム等で溶融し、頂面2aの開口予定部5に芯合わせして固着する。 A method of attaching the unsealing and re-sealing device 6 to the top surface 2a of the paper container main body 1a is to melt the back surface of the flange portion 7d with a microframe or the like using a device (not shown) and align the core with the planned opening portion 5 of the top surface 2a. To do.

外筒部7と内筒部8、内筒部8と蓋部9の間には、スポット溶着等によるいたずら防止の図示しないロック機構を設け、このロック機構は手動による外力で容易に破断してロック解除できる。 A lock mechanism (not shown) is provided between the outer cylinder portion 7 and the inner cylinder portion 8 and between the inner cylinder portion 8 and the lid portion 9 to prevent tampering by spot welding or the like, and this lock mechanism can be easily broken by an external force manually. Can be unlocked.

図3に示すように、包装材Pの構成は、外側から内側にかけて順に、外側層P1、紙基材P2、接着層P3、バリヤー層P4、二層の内側層P5から成り、紙基材P2の外側面に予めデザイン等P6が印刷される。外側層P1、内側層P5は低密度ポリエチレン樹脂、接着層P3はポリエチレン或いはエチレン共重合体等の樹脂、バリヤー層P4はアルミ箔等で形成される。そして、開口予定部5は開口容易とするために紙基材P2が直径Gの円形状に切り抜かれた状態のプレラミネーテッドホール(PLH)である。 As shown in FIG. 3, the packaging material P is composed of an outer layer P1, a paper base P2, an adhesive layer P3, a barrier layer P4, and two inner layers P5 in order from the outer side to the inner side. P6 or the like is printed in advance on the outer surface of the sheet. The outer layer P1 and the inner layer P5 are formed of a low density polyethylene resin, the adhesive layer P3 is formed of a resin such as polyethylene or an ethylene copolymer, and the barrier layer P4 is formed of an aluminum foil or the like. The planned opening portion 5 is a pre-laminated hole (PLH) in a state where the paper base P2 is cut into a circular shape with a diameter G in order to facilitate opening.

<紙容器の開封再栓装置の作用>
図4、図5に示すように、紙容器1を開封するために開封再栓装置6の蓋部9を指で押込むと、図示しないロック機構が外れるので内筒部8は外筒部7の内面7bを摺動しながら回転下降する。そして、他端部8bの開口断面に開口予定部5と同径Gの円形状で鋸刃状の破断刃10を備えるので、開口予定部5は破断刃10によって容易に破断して開口5aを形成することができる。内筒部8は下降した位置で外筒部7に隙間なく簡易水密状態で密着する。
<Operation of the paper container opening and re-sealing device>
As shown in FIGS. 4 and 5, when the lid portion 9 of the unsealing device 6 is pushed with a finger to open the paper container 1, the lock mechanism (not shown) is released, so that the inner cylinder portion 8 becomes the outer cylinder portion 7. Rotating and descending while sliding on the inner surface 7b. Further, since the opening cross section of the other end 8b is provided with a circular saw blade-shaped breaking blade 10 having the same diameter G as the opening planned portion 5, the opening opening portion 5 is easily broken by the breaking blade 10 to open the opening 5a. Can be formed. The inner cylinder part 8 is in close contact with the outer cylinder part 7 in a simple watertight state at a lowered position.

なお、破断刃10はヒンジ11の近傍領域には形成されないので開口予定部5はヒンジ11近傍の一部が頂面2aに連結したままの状態で全周破断しない。このため、開口予定部5のバリヤー層P4と、二層の内側層P5とから成る破断片5bは紙容器1の内部に落下しないので飲用時に誤って口内に紛れ込むことを防止できる。 Since the breaking blade 10 is not formed in the region near the hinge 11, the planned opening portion 5 does not break all around in a state where a portion near the hinge 11 remains connected to the top surface 2 a. For this reason, since the broken piece 5b consisting of the barrier layer P4 of the planned opening portion 5 and the two inner layers P5 does not fall into the paper container 1, it can be prevented from being accidentally mixed into the mouth during drinking.

図6、図7に示すように、内筒部8はエルボ状の曲面なので、蓋9を開いて紙容器1を傾けると一端部8aの内側端Kから内容液Qが注出する。ここで、内側端Kは、開口5aにおける内筒部8の内側位置K1から頂面2aに垂直な垂直線Tに対して長さSだけ内筒部8の内側に位置する。 As shown in FIGS. 6 and 7, the inner cylinder portion 8 is an elbow-shaped curved surface. Therefore, when the lid 9 is opened and the paper container 1 is tilted, the content liquid Q is poured out from the inner end K of the one end portion 8a. Here, the inner end K is located on the inner side of the inner cylinder part 8 by a length S with respect to the vertical line T perpendicular to the top surface 2a from the inner position K1 of the inner cylinder part 8 in the opening 5a.

一方、従来の開封再栓装置の場合は頂面2aに垂直な円筒形状から内容液Qを注出するので注出位置は垂直線T上である。 On the other hand, in the case of the conventional opening and re-sealing device, the content liquid Q is poured out from the cylindrical shape perpendicular to the top surface 2a, so that the pouring position is on the vertical line T.

このように、本発明の開封再栓装置6によれば、内筒部8の注出位置としての内側端Kは、開口5aにおける内側位置K1から内部側に長さSだけ頂面2aと平行に移動した位置になるので、従来の垂直線T上に注出位置がある場合と比べると内容液がこぼれ難くなるため使いやすく衛生性に優れる。開封再栓装置6はエルボ状の外筒部7とエルボ状の内筒部8とから成る簡単な構造なので製作コストが安い。所望の内容液Qを注出した後に蓋部9を閉じて図4、図5の状態に戻すことにより開口部を塞いで簡易再封することができるので紙容器の利便性と品質性が向上する。 Thus, according to the unsealing / recapping device 6 of the present invention, the inner end K as the pouring position of the inner cylinder portion 8 is parallel to the top surface 2a by the length S from the inner position K1 in the opening 5a to the inner side. Therefore, it is easy to use and excellent in hygiene because the liquid content is less likely to spill compared with the case where the pouring position is on the conventional vertical line T. The unsealing and re-sealing device 6 has a simple structure consisting of an elbow-shaped outer cylinder portion 7 and an elbow-shaped inner cylinder portion 8, so that the manufacturing cost is low. After the desired content liquid Q has been poured out, the lid 9 is closed and returned to the state shown in FIGS. 4 and 5 so that the opening can be closed and re-sealed, thus improving the convenience and quality of the paper container. To do.

以上、本発明の実施例を図面に基づいて説明したが、具体的な構成はこの実施例に限られるものではなく本発明の要旨を逸脱しない範囲の設計変更等があっても本発明に含まれる。蓋部9はヒンジ11を用いないで内筒部8に自由に着脱可能とする方法でも構わない。開封再栓装置6は頂面2aが屋根状でなく水平の場合でも適用できる。 The embodiment of the present invention has been described with reference to the drawings. However, the specific configuration is not limited to this embodiment, and design changes and the like within the scope of the present invention are included in the present invention. It is. The lid 9 may be freely detachable from the inner cylinder 8 without using the hinge 11. The opening / sealing device 6 can be applied even when the top surface 2a is not roof-like but horizontal.

この発明は、液体食品の包装充填の製造に適用することができる。 The present invention can be applied to the manufacture of liquid food packaging.

1 紙容器
2a 頂面
5 開口予定部
6 開封再栓装置
7 外筒部
7b 内面
8 内筒部
8a 一端部
8b 他端部
9 蓋部
10 破断刃
K 内側端
K1 内側位置
S 長さ
T 垂直線
DESCRIPTION OF SYMBOLS 1 Paper container 2a Top surface 5 Opening planned part 6 Opening / repealing device 7 Outer cylinder part 7b Inner surface 8 Inner cylinder part 8a One end part 8b Other end part 9 Cover part 10 Breaking blade K Inner edge K1 Inner position S Length T Vertical line

Claims (1)

紙基材を折り曲げて屋根型形状の頂面と底面と複数側面から成る紙容器本体の、屋根型形状の前記頂面の傾斜面に設けられる開封再栓装置であって、
前記開封再栓装置は前記頂面に形成された内容液注出用の開口予定部を覆って前記頂面に固着される断面円形でエルボ状の外筒部と、
前記外筒部の内面を摺動する断面円形のエルボ状の内筒部と、
前記内筒部の一端部の周縁部を開閉自在に覆う蓋部と、
前記内筒部の他端部に前記開口予定部を破断する破断刃とを備え、
前記外筒部と前記内筒部は、屋根型形状の前記頂面の前記傾斜面の上方側に向かって湾曲するエルボ状であり、
前記内筒部と前記蓋部はヒンジを介して連結され、
前記破断刃は、前記ヒンジの近傍領域には形成されていない
ことを特徴とする紙容器の開封再栓装置。
A paper container main body composed of a top surface, a bottom surface, and a plurality of side surfaces of a roof mold shape by bending a paper base material, and an opening / repealing device provided on the inclined surface of the top surface of the roof mold shape ,
The unsealing and re-sealing device covers the planned opening portion for dispensing the content liquid formed on the top surface, and has a circular cross-section and elbow-shaped outer cylinder portion fixed to the top surface;
An inner cylindrical portion of circular cross section of the elbow-shaped sliding the inner surface of the outer cylindrical portion,
A lid that covers the peripheral edge of one end of the inner cylinder so as to be freely opened and closed;
A break blade that breaks the planned opening portion at the other end of the inner cylinder portion;
The outer cylinder part and the inner cylinder part are elbow shapes that curve toward the upper side of the inclined surface of the top surface of the roof type shape,
The inner cylinder part and the lid part are connected via a hinge,
The paper container opening and closing device according to claim 1, wherein the breaking blade is not formed in a region near the hinge .
JP2010283220A 2010-12-20 2010-12-20 Resealable opening device for paper containers Expired - Fee Related JP5626789B2 (en)

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JP2019085126A (en) * 2017-11-02 2019-06-06 凸版印刷株式会社 Paper container for liquid

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