JPH09286448A - Plastic lid - Google Patents

Plastic lid

Info

Publication number
JPH09286448A
JPH09286448A JP8096765A JP9676596A JPH09286448A JP H09286448 A JPH09286448 A JP H09286448A JP 8096765 A JP8096765 A JP 8096765A JP 9676596 A JP9676596 A JP 9676596A JP H09286448 A JPH09286448 A JP H09286448A
Authority
JP
Japan
Prior art keywords
container
lid
side wall
plastic lid
wall
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.)
Pending
Application number
JP8096765A
Other languages
Japanese (ja)
Inventor
Kiyoshi Wada
潔 和田
Tomoyoshi Uematsu
友義 上松
Michihiro Maeda
道廣 前田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toppan Inc
Original Assignee
Toppan Printing Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toppan Printing Co Ltd filed Critical Toppan Printing Co Ltd
Priority to JP8096765A priority Critical patent/JPH09286448A/en
Publication of JPH09286448A publication Critical patent/JPH09286448A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D43/00—Lids or covers for rigid or semi-rigid containers
    • B65D43/02—Removable lids or covers
    • B65D43/0202—Removable lids or covers without integral tamper element
    • B65D43/0225—Removable lids or covers without integral tamper element secured by rotation
    • B65D43/0231—Removable lids or covers without integral tamper element secured by rotation only on the outside, or a part turned to the outside, of the mouth of the container
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00018—Overall construction of the lid
    • B65D2543/00064—Shape of the outer periphery
    • B65D2543/00074—Shape of the outer periphery curved
    • B65D2543/00092—Shape of the outer periphery curved circular
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00018—Overall construction of the lid
    • B65D2543/00259—Materials used
    • B65D2543/00296—Plastic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00444—Contact between the container and the lid
    • B65D2543/00481—Contact between the container and the lid on the inside or the outside of the container
    • B65D2543/0049—Contact between the container and the lid on the inside or the outside of the container on the inside, or a part turned to the inside of the mouth of the container
    • B65D2543/00509—Cup
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00444—Contact between the container and the lid
    • B65D2543/00481—Contact between the container and the lid on the inside or the outside of the container
    • B65D2543/0049—Contact between the container and the lid on the inside or the outside of the container on the inside, or a part turned to the inside of the mouth of the container
    • B65D2543/00518—Skirt
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00444—Contact between the container and the lid
    • B65D2543/00481—Contact between the container and the lid on the inside or the outside of the container
    • B65D2543/00537—Contact between the container and the lid on the inside or the outside of the container on the outside, or a part turned to the outside of the mouth of the container
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00444—Contact between the container and the lid
    • B65D2543/00481—Contact between the container and the lid on the inside or the outside of the container
    • B65D2543/00555—Contact between the container and the lid on the inside or the outside of the container on both the inside and the outside

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a plastic lid capable of reducing a head space to the utmost, improving the airtight state within a container and capable of confirming the viginity (unopen state) of the container. SOLUTION: In a plastic lid 10 constituted so that a top part 100 having a drop lid-shaped depressed part 120 is continued to the upper end of a cylindrical peripheral wall part 200 having the thread part 210 with a container provided on the inner surface thereof, the depressed part consists of a conical cylindrical side surface wall 121 gradually becoming narrow downwardly and the disc-shaped bottom surface wall 122 continued to the lower end of the side surface wall or the protruding bottom surface wall continued thereto through a reversal cushion part. When the plastic lid is mounted on the mouth part of a container, the upper inner surface of the side surface wall is brought into close contact with the inner surface of the upper end part of the mouth part of the container and the bottom surface wall is made thicker than the side surface wall.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【発明の属する技術分野】本発明は、ヘッドスペース
（容器内の内容物と蓋との間の空間）を嫌う内容物を充
填する広口容器の口部に装着するプラスチック蓋に関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plastic lid to be attached to the mouth of a wide-mouthed container for filling the contents which hate the head space (the space between the contents in the container and the lid).

【０００２】[0002]

【従来の技術】従来の広口容器に装着するプラスチック
蓋（１０）は、ポリエチレンやポリプロピレンなどの柔
軟性をもつ熱可塑性樹脂を射出成形したものであり、そ
の構造は、一般的には、例えば図３に示すように、容器
との螺合部（２１０）を内面にもつ円筒状の周壁部（２
００）の上端に、円盤状の天部（１００）が連続したも
ので、この天板の内面に、容器の口部に装着したとき
に、容器口部の上端部内面に密接して容器を封止する封
止リング（１３０）が設けられたものであった。2. Description of the Related Art A conventional plastic lid (10) to be mounted on a wide-mouthed container is made by injection-molding a flexible thermoplastic resin such as polyethylene or polypropylene. As shown in FIG. 3, a cylindrical peripheral wall portion (2) having a threaded portion (210) with a container on its inner surface is formed.
00) has a disc-shaped top (100) continuous to the upper end, and when the top of the container is attached to the mouth of the container, the top of the container is closely attached to the inner surface of the top of the container. It was provided with a sealing ring (130) for sealing.

【０００３】[0003]

【発明が解決しようとする課題】容器の内容物が、例え
ば酸化し易くヘッドスペースのエアの存在を嫌う場合な
どには、容器のヘッドスペースを極力少なくする必要が
あるが、しかしながら、上述の従来のプラスチック蓋で
は、天部の内面に容器の口部を封止するための封止リン
グが設けられているため、構造上、自ずとヘッドスペー
スを減ずる限界があった。また、封止リングだけでは、
容器内の気密性が悪いこともあった。When the contents of the container are easily oxidized, for example, and the presence of air in the headspace is disliked, it is necessary to reduce the headspace of the container as much as possible. In the plastic lid of (1), since the sealing ring for sealing the mouth of the container is provided on the inner surface of the top, there is a limit in reducing the head space due to its structure. Also, with only the sealing ring,
The airtightness inside the container was sometimes poor.

【０００４】本発明は、上述の従来のプラスチック蓋の
問題を解決したものであり、ヘッドスペースを極力少な
くでき、容器内の気密状態が良く、また、容器のバージ
ン（未開封）性を確認可能なプラスチック蓋を提供する
ものである。The present invention solves the above-mentioned problems of the conventional plastic lids, can minimize the head space, keep the container airtight, and confirm the virgin (unopened) property of the container. It provides a simple plastic lid.

【０００５】[0005]

【課題を解決するための手段】本発明の第１の発明は、
図１に示すように、容器との螺合部（２１０）を内面に
もつ円筒状の周壁部（２００）の上端に、落し蓋状の凹
陥部（１２０）をもつ天部（１００）が連続するプラス
チック蓋であって、前記凹陥部（１２０）は、下方へ漸
次狭くなる円錐筒状の側面壁（１２１）と、この側面壁
の下端に連続する円盤状の底面壁（１２２）とからな
り、前記側面壁（１２１）は、容器の口部に装着したと
きに、上部内面を容器口部の上端部内面に密接して容器
を封止し、且つ、前記底面壁（１２２）が、前記側面壁
（１２１）より厚肉であることを特徴とするプラスチッ
ク蓋（１０）である。Means for Solving the Problems A first invention of the present invention is:
As shown in FIG. 1, a top part (100) having a recessed part (120) in the shape of a drop lid is continuous with the upper end of a cylindrical peripheral wall part (200) having a threaded part (210) with a container on its inner surface. A plastic lid, wherein the recessed portion (120) includes a conical cylindrical side wall (121) that gradually narrows downward, and a disc-shaped bottom wall (122) continuous to the lower end of the side wall. When the side wall (121) is attached to the mouth of the container, the inner wall of the upper part is in close contact with the inner wall of the upper end of the container mouth to seal the container, and the bottom wall (122) is the side wall. A plastic lid (10) characterized in that it is thicker than the wall (121).

【０００６】また、本発明の第２の発明は、図２に示す
ように、容器との螺合部（２１０）を内面にもつ円筒状
の周壁部（２００）の上端に、落し蓋状の凹陥部（１２
０）をもつ天部（１００）が連続するプラスチック蓋で
あって、前記凹陥部（１２０）は、下方へ漸次狭くなる
円錐筒状の側面壁（１２１）と、この側面壁の下端に反
転クッション部（１２３）を介して連続する凸面状の底
面壁（１２２）とからなり、前記側面壁（１２１）は、
容器の口部に装着したときに、上部内面を容器口部の上
端部内面に密接して容器を封止し、且つ、前記底面壁
（１２２）が、前記側面壁（１２１）より厚肉であるこ
とを特徴とするプラスチック蓋（１０）である。In the second aspect of the present invention, as shown in FIG. 2, a drop-lid-shaped recess is formed at the upper end of a cylindrical peripheral wall portion (200) having a threaded portion (210) with a container on its inner surface. Division (12
0) is a continuous plastic lid with a top portion (100), and the concave portion (120) has a conical cylindrical side wall (121) that gradually narrows downward, and an inversion cushion at the lower end of the side wall. And a convex bottom wall (122) continuous through the portion (123), and the side wall (121) is
When attached to the mouth of the container, the inner surface of the upper part is in close contact with the inner surface of the upper end of the container to seal the container, and the bottom wall (122) is thicker than the side wall (121). A plastic lid (10) characterized in that

【０００７】[0007]

【作用】本発明のプラスチック蓋は、天部に落し蓋状の
凹陥部が設けられているため、内容物を充填した容器に
装着したときに、凹陥部により内容物と蓋との間のヘッ
ドスペースを減ずることができる。The plastic lid of the present invention is provided with a drop-like recessed portion at the top, so that when it is mounted on a container filled with the content, the headspace between the content and the lid is provided by the recessed portion. Can be reduced.

【０００８】また、本発明のプラスチック蓋を、容器の
口部に螺合して装着するときに、凹陥部の側面壁が下方
へ漸次狭くなる円錐筒状に形成されているため、蓋が容
器に装着されるにつれて、容器内のエアが蓋と容器の隙
間から排除され、蓋の装着が完了したときには、蓋の側
面壁の上部内面が容器口部の上端部内面に密接するた
め、容器は蓋で封止され、容器内の気密性が良好とな
る。Further, when the plastic lid of the present invention is screwed into the mouth of the container to be mounted, the side wall of the concave portion is formed in a conical cylinder shape that gradually narrows downward, so that the lid is a container. As the air inside the container is removed from the gap between the lid and the container, the upper inner surface of the side wall of the lid comes into close contact with the inner surface of the upper end portion of the container mouth when the lid is completely installed. Sealed with a lid, the airtightness in the container is improved.

【０００９】また、本発明のプラスチック蓋は、天部に
設けられた凹陥部の円盤状の底面壁が、側面壁より厚肉
であるあるため、蓋が容器に装着されたときに、容器に
対する蓋の中心合わせが、装着中に自ずと行われる。Further, in the plastic lid of the present invention, since the disk-shaped bottom wall of the concave portion provided in the top portion is thicker than the side wall, when the lid is attached to the container, the plastic lid is attached to the container. Centering of the lid is done automatically during installation.

【００１０】そして、下方へ漸次狭くなる円錐筒状の凹
陥部の側面壁（１２１）の下端に、図２に示すように、
凸面状の底面壁（１２２）を反転クッション部（１２
３）を介して連続した本発明のプラスチック蓋（１０）
は、内容物がホット充填された容器に装着された場合に
は、内容物の冷却につれ容器内が減圧するため、凸面状
の底面壁が、ある時点で減圧力に負け、反転クッション
部のところから反転して、１点鎖線で示すように、凹面
状の底面壁となる。この凹面状の底面壁は、容器が開封
され減圧力が解かれると、底面壁の剛性力により凸面状
に復元する。このことから、容器にバージン性が付与さ
れる。Then, as shown in FIG. 2, at the lower end of the side wall (121) of the conical cylindrical recess which gradually narrows downward,
The convex bottom wall (122) is replaced with the inversion cushion part (12
3) a plastic lid (10) of the invention continuous through
When the contents are attached to a hot-filled container, the pressure inside the container decreases as the contents cool, so the convex bottom wall loses the decompression force at a certain point, and at the reversing cushion part. To be a concave bottom wall as indicated by the one-dot chain line. When the container is opened and the decompression force is released, the concave bottom wall restores to a convex shape due to the rigidity of the bottom wall. From this, virginity is imparted to the container.

【００１１】[0011]

【発明の実施の形態】本発明のプラスチック蓋（１０）
は、ポリエチレンやポリプロピレンなどの柔軟性を有す
る熱可塑性樹脂を射出成形した広口容器用の蓋であり、
その構造は、図１に示すように、容器との螺合部（２１
０）を内面にもつ円筒状の周壁部（２００）の上端に、
落し蓋状の凹陥部（１２０）をもつ天部（１００）の外
周部（１１０）が連続したものである。凹陥部（１２
０）は、図１に示すように、側面壁（１２１）の下端に
円盤状の底面壁（１２２）が連続したものか、又は、図
２に示すように、側面壁（１２１）の下端に反転クッシ
ョン部（１２３）を介して凸面状の底面壁（１２２）を
連続したものであり、側面壁は、下方へ漸次狭くなる円
錐筒状で、容器の口部に装着したときに、上部内面を容
器口部の上端部内面に密接して容器を封止するように形
成するのもであり、底面壁は、容器の口部に装着したと
きに、自ずと容器に対する蓋の中心合わせが行われるよ
うに、側面壁より肉厚に形成するものである。また、凹
陥部の深さは、容器の目的に合わせて任意に定めるもの
である。BEST MODE FOR CARRYING OUT THE INVENTION The plastic lid (10) of the present invention
Is a lid for a wide-mouth container that is injection-molded with a flexible thermoplastic resin such as polyethylene or polypropylene.
As shown in FIG. 1, the structure is such that a threaded portion (21
0) on the inner surface of the cylindrical peripheral wall portion (200),
The outer peripheral portion (110) of the top portion (100) having the recessed portion (120) in the shape of a drop lid is continuous. Recess (12
0) is a disc-shaped bottom wall (122) continuous with the lower end of the side wall (121) as shown in FIG. 1, or, as shown in FIG. 2, at the lower end of the side wall (121). A convex bottom wall (122) is continuous through an inversion cushion portion (123), and the side wall has a conical cylindrical shape that gradually narrows downward, and when attached to the mouth of the container, the upper inner surface It is also formed so as to seal the container in close contact with the inner surface of the upper end of the container mouth, and when the bottom wall is attached to the mouth of the container, the lid is automatically centered with respect to the container. As described above, the side wall is formed thicker. Further, the depth of the recessed portion is arbitrarily determined according to the purpose of the container.

【００１２】[0012]

【実施例】【Example】

＜実施例１＞まず、図１に示すように、容器との螺合部
（２１０）を内面に設けた外径が９４．２ｍｍφで高さ
が７．５ｍｍの周壁（２００）の上端に、上端の内径が
８６．５ｍｍφで下端の内径が８５．３ｍｍφで深さが
６．２ｍｍの凹陥部（１２０）を中心位置に形成する天
部（１００）を連続する本実施例のプラスチック蓋（１
０）を、ポリプロピレンを用いて射出成形法で作製し
た。なお、凹陥部の円錐筒状の側面壁（１２１）の厚さ
は、０．６ｍｍであり、円盤状の底面壁（１２２）の厚
さは、０．８ｍｍであった。Example 1 First, as shown in FIG. 1, at the upper end of a peripheral wall (200) having an outer diameter of 94.2 mmφ and a height of 7.5 mm provided with a threaded portion (210) with a container on the inner surface, The plastic lid (1) of the present embodiment, which is continuous with the top (100) forming the recessed part (120) having the inner diameter of the upper end of 86.5 mmφ, the inner diameter of the lower end of 85.3 mmφ and the depth of 6.2 mm at the center position.
0) was produced by injection molding using polypropylene. The conical tubular side wall (121) of the recess had a thickness of 0.6 mm, and the disc-shaped bottom wall (122) had a thickness of 0.8 mm.

【００１３】上述の本実施例のプラスチック蓋を、内容
物を充填したポリエチレンテレフタレート製の２軸延伸
ブロー広口容器の口頸部に螺合させて装着した。この広
口容器は、蓋の天部に形成された落し蓋状の凹陥部によ
り、蓋と内容物との間のヘッドスペースが極めて少なか
った。また、容器に対する中心合わせが自ずと行われて
おり、容器の気密性も良好であった。The above-mentioned plastic lid of this embodiment was screwed onto the mouth and neck of a biaxially stretched blow wide-mouth container made of polyethylene terephthalate filled with contents. In this wide-mouthed container, the head space between the lid and the contents was extremely small due to the drop-lid-shaped recess formed in the top of the lid. Further, the centering of the container was naturally performed, and the airtightness of the container was good.

【００１４】＜実施例２＞まず、材質がポリエチレン
で、凹陥部（１２０）の側面壁（１２１）の下端に、凸
面状の底面壁（１２２）を波状の反転クッション部（１
２３）を介して連続させた以外は、実施例１と同様な図
２に示す本実施例のプラスチック蓋（１０）を作製し
た。<Embodiment 2> First, the material is polyethylene, and a convex bottom wall (122) is formed at the lower end of the side wall (121) of the recess (120) and a wavy reversing cushion (1).
23) A plastic lid (10) of this example shown in FIG. 2 was produced in the same manner as in Example 1 except that the plastic lid (10) was continuous.

【００１５】上述の本実施例のプラスチック蓋を、内容
物をホット充填した広口容器の口頸部に装着した。内容
物が常温になると、底面壁が反転クッション部ところか
ら反転して凹面状となった。この広口容器は、ヘッドス
ペースが極めて少なく、容器に対する蓋の中心合わせが
自ずと行われており、容器の気密性も良好であった。容
器を開封すると底面壁が凸面状に復元した。The above-mentioned plastic lid of this embodiment was attached to the mouth and neck of a wide-mouthed container whose contents were hot-filled. When the contents reached normal temperature, the bottom wall was inverted from the inversion cushion portion and became a concave shape. In this wide-mouthed container, the head space was extremely small, the lid was naturally centered with respect to the container, and the container was also airtight. When the container was opened, the bottom wall was restored to a convex shape.

【００１６】[0016]

【発明の効果】本発明のプラスチック蓋は、ヘッドスペ
ースを嫌う内容物を充填した広口容器に使用するもので
あり、天部に落し蓋状の側面壁と肉厚の底面壁からなる
凹陥部が形成されているため、容器口部に装着したとき
に、内容物と蓋間のヘッドスペースが、従来のプラスチ
ック蓋と比較して著しく減じられ、容器に対する中心合
わせも自ずと行われる。また、蓋の側面壁の上部内面
が、容器口部の上端部内面に密接するので、容器内の気
密性が良好とある。INDUSTRIAL APPLICABILITY The plastic lid of the present invention is used for a wide-mouthed container filled with contents that hate the head space, and has a recessed portion formed on the top portion and having a lid-like side wall and a thick bottom wall. Therefore, the head space between the contents and the lid when mounted on the mouth of the container is significantly reduced as compared with the conventional plastic lid, and centering with respect to the container is naturally performed. Further, since the inner surface of the upper portion of the side wall of the lid comes into close contact with the inner surface of the upper end portion of the container mouth, the airtightness inside the container is good.

【００１７】また、凹陥部の側面壁の下端に、凸面状の
底面壁を反転クッション部を介して連続した本発明のプ
ラスチック蓋は、内容物がホット充填された容器に装着
された場合には、内容物が常温まで冷却すると、容器内
が減圧するため、凸面状の底面壁が、反転クッション部
ところから反転して凹面状となる。しかし、一旦、容器
が開封されると、底面壁が凸面状に復元するため、未開
封の容器のバージン性が、外観から一目して確認するこ
とができる。Further, the plastic lid of the present invention in which the bottom wall of the convex shape is connected to the lower end of the side wall of the recessed portion through the inversion cushion portion, the content of the plastic lid of the present invention is such that when the content is attached to a hot-filled container. When the contents are cooled to room temperature, the inside of the container is depressurized, so that the convex bottom wall is inverted from the inversion cushion portion to a concave shape. However, once the container is opened, the bottom wall restores to a convex shape, so that the virgin property of the unopened container can be confirmed at a glance from the appearance.

【図面の簡単な説明】[Brief description of drawings]

【図１】本発明の一実施例のプラスチック蓋の断面図で
ある。FIG. 1 is a sectional view of a plastic lid according to an embodiment of the present invention.

【図２】本発明の他の実施例のプラスチック蓋の断面図
である。FIG. 2 is a sectional view of a plastic lid according to another embodiment of the present invention.

【図３】従来の一例のプラスチック蓋の断面図である。FIG. 3 is a cross-sectional view of a conventional plastic lid.

【符号の説明】[Explanation of symbols]

１０……プラスチック蓋 １００……天板 １１０……外周部 １２０……凹陥部 １２１……側面壁 １２２……底面壁 １２３……反転クッション部 １３０……封止リング ２００……周壁部 ２１０……螺合部 10 ... Plastic lid 100 ... Top plate 110 ... Outer peripheral part 120 ... Recessed part 121 ... Side wall 122 ... Bottom wall 123 ... Inverted cushion part 130 ... Sealing ring 200 ... Peripheral wall part 210 ... Threaded part

Claims (2)

【特許請求の範囲】[Claims] 【請求項１】容器との螺合部を内面にもつ円筒状の周壁
部の上端に、落し蓋状の凹陥部をもつ天部が連続するプ
ラスチック蓋であって、前記凹陥部は、下方へ漸次狭く
なる円錐筒状の側面壁と、この側面壁の下端に連続する
円盤状の底面壁とからなり、前記側面壁は、容器の口部
に装着したときに、上部内面を容器口部の上端部内面に
密接して容器を封止し、且つ、前記底面壁が、前記側面
壁より厚肉であることを特徴とするプラスチック蓋。1. A plastic lid in which a top portion having a recessed portion in the shape of a drop lid is continuous to the upper end of a cylindrical peripheral wall portion having a threaded portion with a container on the inner surface, and the recessed portion gradually extends downward. It consists of a conical cylindrical side wall that becomes narrower and a disk-shaped bottom wall that is continuous with the lower end of this side wall, and when the side wall is attached to the mouth of the container, the inner surface of the upper part is the upper end of the container mouth. A plastic lid characterized in that the container closely seals the inner surface of the part and the bottom wall is thicker than the side wall. 【請求項２】容器との螺合部を内面にもつ円筒状の周壁
部の上端に、落し蓋状の凹陥部をもつ天部が連続するプ
ラスチック蓋であって、前記凹陥部は、下方へ漸次狭く
なる円錐筒状の側面壁と、この側面壁の下端に反転クッ
ション部を介して連続する凸面状の底面壁とからなり、
前記側面壁は、容器の口部に装着したときに、上部内面
を容器口部の上端部内面に密接して容器を封止し、且
つ、前記底面壁が、前記側面壁より厚肉であることを特
徴とするプラスチック蓋。2. A plastic lid in which a top portion having a recess portion like a drop lid is continuous to the upper end of a cylindrical peripheral wall portion having a threaded portion with a container on the inner surface, and the recess portion is gradually downward. It consists of a conical cylindrical side wall that becomes narrower, and a convex bottom wall that is continuous to the lower end of this side wall via an inversion cushion section,
When the side wall is attached to the mouth of the container, the inner surface of the upper portion closely contacts the inner surface of the upper end of the container mouth to seal the container, and the bottom wall is thicker than the side wall. A plastic lid that is characterized.
JP8096765A 1996-04-18 1996-04-18 Plastic lid Pending JPH09286448A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8096765A JPH09286448A (en) 1996-04-18 1996-04-18 Plastic lid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8096765A JPH09286448A (en) 1996-04-18 1996-04-18 Plastic lid

Publications (1)

Publication Number Publication Date
JPH09286448A true JPH09286448A (en) 1997-11-04

Family

ID=14173739

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8096765A Pending JPH09286448A (en) 1996-04-18 1996-04-18 Plastic lid

Country Status (1)

Country Link
JP (1) JPH09286448A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002059948A (en) * 2000-08-14 2002-02-26 Japan Crown Cork Co Ltd Container lid with barrier film arranged on inner surface of circular shielding wall
JP2007238100A (en) * 2006-03-03 2007-09-20 Blue Mercury:Kk Gas-containing beverage container, and its filling method
JP2013014345A (en) * 2011-06-30 2013-01-24 Yoshino Kogyosho Co Ltd Cap for container having decompression absorbing function
JP2019206395A (en) * 2019-08-20 2019-12-05 エア・ウォーター株式会社 Bottle cap

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002059948A (en) * 2000-08-14 2002-02-26 Japan Crown Cork Co Ltd Container lid with barrier film arranged on inner surface of circular shielding wall
JP4601137B2 (en) * 2000-08-14 2010-12-22 日本クラウンコルク株式会社 Container lid with a barrier film on the inner surface of a circular barrier
JP2007238100A (en) * 2006-03-03 2007-09-20 Blue Mercury:Kk Gas-containing beverage container, and its filling method
JP2013014345A (en) * 2011-06-30 2013-01-24 Yoshino Kogyosho Co Ltd Cap for container having decompression absorbing function
JP2019206395A (en) * 2019-08-20 2019-12-05 エア・ウォーター株式会社 Bottle cap

Similar Documents

Publication Publication Date Title
US4143785A (en) Plastic vacuum sealing cap
US6260723B1 (en) Package for flowable media having a snap lid and preform for making same
US5020683A (en) Plastic closure
US4341317A (en) Biaxially oriented bottle of saturated polyester resin
JP3462085B2 (en) Plastic closure
US4226334A (en) Stopper
FR2447330A1 (en) CAP WITHOUT TRIM FOR PRESSURE CONTAINERS AND BOTTLE / CAP ASSEMBLY
CA2518987A1 (en) Container units for drugs, drug containers, and rubber closures
US3151757A (en) Container closure
KR20040097314A (en) Plastic barrier closure and method of fabrication
EP1457423A4 (en) Container main body made of synthetic resin and preforming mold device
US4726484A (en) Package employing unique closure seal and container therefor
US5100013A (en) Plastic closure
US3169656A (en) Bottle closure
JPH09286448A (en) Plastic lid
US3904072A (en) Screw on lid
US20220073237A1 (en) Plastic cap
GB2078194A (en) Reinforced biaxially-oriented bottle
US4682704A (en) Floating cap seal
US4610372A (en) Self-sealing closure for small containers
US3100577A (en) Linerless venting closure
JPH0664656A (en) Linerless closing member
CA2412366A1 (en) Plastic closure cap, with sealing skirt
JP2006327630A (en) Sealing structure of container
JP2018203350A (en) Sealed container