CN1849244A - 罐的封闭装置 - Google Patents

罐的封闭装置 Download PDF

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Publication number
CN1849244A
CN1849244A CNA2004800261716A CN200480026171A CN1849244A CN 1849244 A CN1849244 A CN 1849244A CN A2004800261716 A CNA2004800261716 A CN A2004800261716A CN 200480026171 A CN200480026171 A CN 200480026171A CN 1849244 A CN1849244 A CN 1849244A
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tubular body
lid
sealing
jar
cross
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安东尼奥·C·T·阿尔瓦雷斯
安东尼奥·R·塞内
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Brasilata SA Embalagens Metalicas
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Brasilata SA Embalagens Metalicas
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Abstract

本发明公开了一种用于罐的封闭装置，该罐的类型为包括：管状体(10)，所述管状体具有带底座(16)的开口上端(13)；以及塑料盖(20)，所述盖包括密封部(21)和可轴向打破的密封件(25)，该密封件由承座在管状体(10)的上端(13)周围的下护裙(25a)以及借助于可打破的径向桥(26)内部地结合到密封部(21)的上边缘(25b)所形成。管状体(10)的上端(13)的横截面轮廓基本上小于管状体(10)其余部分的最大横截面轮廓，以使得盖(20)的轮廓保持在管状体(10)的所述最大横截面轮廓之内，从而避免两个并排布置的相邻罐的盖(20)之间的相互接触。

Description

罐的封闭装置
技术领域
本发明涉及用于罐(can)的封闭装置(closure arrangement)中的改进，所述罐用金属板获得并且其类型为包括有管状体，并且下边缘附接或结合有底壁，上边缘直接借助于管状体的变形部分或借助于可以呈结构环形式的环形上壁部分承载一个底座，该底座用于承座和保持压配合的塑性盖。本发明尤其涉及一种具有塑料盖的封闭装置，其用于上述类型的罐，这种罐用来容纳逐渐消耗的产品，比如某些食品。
背景技术
有期限的产品(比如某些食品)必须要密封地存储并且给消费者提供清楚的可视指示，说明市场中出现的盛装这些产品的容器还没有遭到破坏。考虑到这些产品中很多是逐渐消耗的，必须要求，在第一次打开容器之后，在所存储产品的逐渐消耗期间，这个准许进出罐内部的盖可以根据需要多次地封闭，以保证重新封闭的罐的密封性并保护其中剩余的内容物。
具有压配合盖的罐在现有技术中是公知的，这种压配合的盖通过压力装配到周边结构环中，该结构环位于罐体的上边缘内部并且密封地双重卷边到所述上边缘。在这种类型的构造中，内容物的密封性由装配在承座和保持底座中的盖来保证，该底座能设在限定出罐的环形上壁的结构环中或者罐的管状体中。
从巴西专利申请PI 0003727-3、PI 0203950-8和PI 0303138-1中还已知一种解决方案，其中塑料盖包括有可移除地承座和保持在底座中的密封部以及可手动打破的密封件，该密封件布置在罐的管状体的上端之上和其周围并且通过可打破的连接件连接到该密封部。
虽然避免了用于容纳逐渐消耗产品的罐的现有盖的缺点，但是相同申请人的这些现有解决方案仍然具有可以改进的不足之处。
在相同申请人提出的现有解决方案中，盖被安装为其密封件布置在罐体的上端之上和其周围并且所述上端的轮廓基本上等于罐的管状体的横截面轮廓。因而，盖被定位为其密封件从该横截面轮廓向外径向地突出并且因而容易与并排且相邻布置的另一个罐的盖的密封件相碰撞。
在已经充满并封闭的罐的包装操作过程中，以及在其中它们仍然彼此相接触的箱子或托盘(pallet)的运输过程中，与另一个罐盖相碰撞的罐盖的密封件可能会部分或完全地破裂。
密封件部分的破裂也会让交易商和消费者知道：罐的内容物已经被破坏。一旦关于罐内容物完整的可靠性已被破坏，这种已经包装的待销售产品就不得不抛弃掉。
这种已知解决方案的另一缺点来自于：罐的堆叠使得罐盖在其密封件上能容纳紧邻地布置在其上的罐的管状体的通常双重卷边的下边缘。在这种布置中，该堆叠中上罐的重量只是沿着相应密封件的周边对准处施加在下罐上，上罐的下边缘承座在所述密封件上。因而，堆叠负荷就集中在限定于密封件上的特定且受限的盖区域。此外，密封件应当包括有很小的上圆周壁，优选地在其周边区域，所述上圆周壁仍然处于堆叠在下罐之上的罐的管状体下端轮廓的外面，以限定出阻挡方式从而避免罐不适当地径向移动出其所处于的堆叠的垂直排列的外面。
发明内容
本发明的一般目的是提供一种改进的封闭装置，其用于本文所述类型的罐，这种封闭装置具有简单且低成本的构造，其使用了塑料盖，该塑料盖具有能可靠地使破坏情况很明显的密封件，该密封件被定位为使得不与另一横向且相邻布置的相同类型罐的盖相接触，从而保证在所述罐的包装、运输和存储过程中所述盖的密封件的完整性。
本发明的又一目标是提供一种如上所述那样改进的罐封闭装置，其允许罐的可靠堆叠并且不会有堆叠负荷集中于盖的特定且受限的区域。
上述一般目标通过提供一种类型的罐来获得，这种罐包括：管状体，所述管状体具有封闭下端和设有底座的开口上端；以及呈单体塑料的盖，所述盖包括可移除和密封地承座在底座上的密封部并且从后者径向向外地突出；以及密封件，该密封件在其圆周延伸部分的区域中可轴向地打破并且具有紧密地承座在管状体的上端周围的下护裙以及借助于可打破的径向桥内部地结合到密封部的上边缘，在第一次打开盖时，在受到用于将密封件从密封部分离的一定拉力时，该径向桥就会断裂。
根据本发明，管状体的上端(密封件的下护裙承座在该上端的周围)的横截面轮廓小于管状体其余部分的最大横截面轮廓，以使得盖的轮廓保持在管状体的所述最大横截面轮廓之内，从而避免两个并排布置的相邻罐的盖之间的相互接触。
上述构造能总体地保护盖在不同的操作情况下不会与另一相邻罐的盖相接触和碰撞，其中这些罐以至少两个单元的组连接，并且受到手动或机械的处理或运输运动。
除了上述技术效果之外，这种新的构造使得，当罐的底部处于紧邻地布置在其下面的罐的盖上时，能在承座的同时在罐的底部上出现更好的负荷分布。
附图说明
以下将参照作为本发明实施例的例子给出的附图描述本发明，并且在附图中：
图1是根据本发明的罐的透视图，该罐具有处于封闭装置中的塑料盖；
图2是图1所示罐和盖的分解透视图，在打破盖的密封件之后；
图3是图1所示罐和塑料盖的俯视图；
图4是图1-3所示罐和盖在直径上的局部横截面图，依照图3中线IV-IV截取；和
图5是类似于图4的视图，不过依照图3中线V-V截取；
具体实施方式
依照附图，这种封闭装置应用于金属板制成的罐，这种罐包括管状体10，并且具有附接底壁12的下端11以及借助于双重卷边(doubleseam)14附接环形上壁15的上端13，该环形上壁15在内部限定了用于密封地承座盖20的底座16。所示管状体10具有圆形横截面，然而可以理解的是，所述横截面也可以为圆形之外的其它实施例。
环形上壁15和底座16的构造可以呈不同的方式，只要其允许盖20密封且牢固地装配在罐的上部中。在图4和5中，环形上壁15和底座16的构造如在巴西授权给相同申请人的巴西专利PI 9408643-5以及在其它国家授权给相同申请人的专利(例如在美国为US5,899,352，在欧洲为EP 0706486)所描述和声明的那样完成，因此省略其在本申请中的详细描述。
根据本发明并且如附图所示，盖20优选地如相同申请人于2003年7月24日提交的同样未决的专利申请PI 0303138-1所述的那样构造。所述盖20用透明或非透明的塑料获得并且包括可移除地承座和保持在底座16中的密封部21，并且具有承座在罐的管状体10的上端13上的外边缘21b。在具有密封部21的单体中，盖20还包括有密封件25，该密封件25具有通常紧密地承座在管状体10的上端13周围的下护裙25a并且还具有上边缘25b，该上边缘借助于可手动打破的桥26结合到密封部21的外边缘21b。
根据本发明，当盖20被第一次打开时，在受到用于将密封件25从密封部21分开的一定拉力时，桥26就会断裂。
根据本发明，密封部21具有轴向向下地突出穿过遮断(interruption)25c的夹持接片27，所述遮断25c设在密封件25中例如仍然与下护裙25a基本上平齐的圆周延伸部分中。
密封件25包括至少一个可打破的锁28，该锁将夹持接片27连接到下护裙25a。
只是当密封件25部分地断裂时，夹持接片27才可以手动地操作，例如在每个可打破的锁28断裂时。
在所示构造中，下护裙25a结合密封桥25d的端部，密封桥25d的所述端部圆周地延伸过密封件25的遮断25c和夹持接片27。密封桥25d具有由连接装置25f结合到下护裙25a的第一端25e，当所述第一端25e被迫从下护裙25a离开时，所述连接装置就被打破以允许手动利用夹持接片27。夹持接片27借助于可打破的锁28在下面结合到密封桥25d，所述密封桥25d的形式为一个或多个在第一次打开该盖时被手动地打破的轴向桥。
在所示构造中，密封部21的外边缘21b具有小的圆柱形下凸缘21c，该下凸缘涉及(优选地紧密地)管状体10的上端13的圆周延伸部分并且由此向下悬垂从其下面结合到下护裙25a的上边缘25b。
如所示，下护裙25a还可以结合到内圆周凸起25h，所述内圆周凸起与密封部21的外边缘21b轴向地间隔开并且其尺寸被形成为被承座和轴向地锁闭在管状体10的上端13中的双重卷边14下面并且围绕在其周围。
根据本发明，管状体10的上端13被成形为横截面轮廓小于管状体10的最大横截面轮廓，以防止盖子20与两个并排布置的相邻罐之间的相互接触。
在所示的优选构造中，管状体10具有上部10a，所述上部包括管状体10的上端13并且其横截面轮廓基本上与所述上端13相同。管状体10的所述上部10a具有比盖20的密封件25的下护裙25a高的高度或延伸。在所示实施例中，管状体10的上部10a的高度大约两倍于盖20的下护裙25a的高度。
管状体10的上部10a在其下面结合到过渡部10b，该过渡部的横截面轮廓由两个向上会聚的直线段限定，所述过渡部10b将管状体10的上部10a组合到管状体10的基本部10c。在所述实施例中，管状体10的基本部10c(限定在过渡部10b之下)具有基本上恒定的大致圆形横截面轮廓，所述基本部10c由管状体10的下端11在下面进行限制。
基本部10c的横截面轮廓基本上大于上部10a的横截面轮廓，以允许盖20，更具体地其下护裙25a及其密封桥25d，限定出包含在基本部10c的横截面轮廓内侧的轮廓。
如图4和5所示，本发明所建议的构造允许罐的管状体10的下端11的轮廓足够地大于上端13的轮廓，以便使得在堆叠罐时，所述下端被定位在紧邻地位于其下面的管状体10的上端13的外侧。具有这种构造，在堆叠罐时，管状体10的底壁12承座在该堆叠中紧邻地位于其下面的管状体10的盖20上，从而保证堆叠负荷在盖20上的更好分布。堆叠的管状体10之间的锁闭通过上管状体10的下端11和紧邻地布置在其下面的管状体10的盖20的下护裙25a之间径向上的公盈(interference)来形成。
虽然已经相对于一单个构造实施例描述了本发明，但是应当理解的是，在不偏离由所附权利要求所限定的构造概念的前提下也能做出变化。

Claims (6)

1.一种用于罐的封闭装置中的改进，所述类型的罐包括：管状体(10)，所述管状体具有封闭下端(11)和具有底座(16)的开口上端(13)；以及呈单体塑料的盖(20)，所述盖包括可移除和密封地承座在底座(16)上的密封部(21)并且从底座(16)径向向外地突出；以及密封件(25)，该密封件可在其周向延伸部分的区域中轴向地打破并且具有紧密地承座在管状体(10)的上端(13)周围的下护裙(25a)以及借助于可打破的径向桥(26)内部地结合到密封部(21)的上边缘(25b)，在第一次打开盖(20)时，在受到用于将密封件(25)从密封部(21)分离的一定拉力时，该径向桥就会破裂，所述改进的特征在于，管状体(10)的其周围承座有密封件(25)的下护裙(25a)的上端(13)的横截面轮廓小于管状体(10)其余部分的最大横截面轮廓，以使得盖(20)的轮廓保持在管状体(10)的所述最大横截面轮廓之内，从而避免两个并排布置的相邻罐的盖(20)之间的相互接触。
2.如权利要求1所述的改进，其特征在于，管状体(10)的上端(13)限定在该管状体的上部(10a)，所述上部具有与该上端(13)基本上相等的横截面轮廓并且其高度大于密封件(25)的下护裙(25a)的高度。
3.如权利要求2所述的改进，其特征在于，管状体(10)包括基本部(10c)，该基本部限定在上部(10a)之下并且由管状体(10)的下端(11)限制在下方。
4.如权利要求3所述的改进，其特征在于，管状体(10)的基本部(10c)具有基本上恒定且大于上部(10a)的横截面轮廓。
5.如权利要求3所述的改进，其特征在于，管状体(10)的上部(10a)通过过渡部(10b)联合到管状体(10)的基本部(10c)，该过渡部的横截面外形由两个向上汇聚的直线段所限定。
6.如前述任一权利要求所述的改进，其特征在于，管状体(10)还包括具有外边缘和内边缘的环形上壁(15)，该外边缘被双重卷边到管状体(10)的上端(13)，该内边缘限定了用于承座盖(20)的密封部(21)的底座(16)。
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