CN1039694C - 可重复使用重复收缩的容器和与之相配的可重复密封的盖 - Google Patents

可重复使用重复收缩的容器和与之相配的可重复密封的盖 Download PDF

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CN1039694C
CN1039694C CN94194429A CN94194429A CN1039694C CN 1039694 C CN1039694 C CN 1039694C CN 94194429 A CN94194429 A CN 94194429A CN 94194429 A CN94194429 A CN 94194429A CN 1039694 C CN1039694 C CN 1039694C
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E·S·罗宾斯三世
R·舒曼
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E S ROBBINS 3
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Abstract

一容器和与之相配的盖组件包括一容器本体，其开口上端由一具有一水平上表面和一径向外延伸的斜切表面的环形边缘所限定。盖具有一顶壁、一径向朝外的下垂裙部和一径向朝内的下垂裙部。两裙部在径向由一内盖表面连接，一向下向外倾斜密封的第二表面部分和一连接于径向朝外的裙部的第三表面部分。第二向下向外的倾斜密封表面可密封地与环形边缘的斜切表面啮合，使得最上边在所述盖和所述容器啮合时轴向地与盖顶壁间隔开。

Description

可重复使用重复收缩的容器和与之相配的可重复密封的盖
技术领域
本发明涉及可收缩的塑料容器，尤其是与这种容器联用的盖。
技术背景
可收缩容器饮水杯或类似物当然是公知的。例如美国专利No.4,930,644公开了一种容器及盖，其特征是具有容器本体，本体具有由一环形边缘限定的开口上端，容器有一个具有一顶端和一径向朝外的下垂部的盖，环形边缘有一平的上表面和径向向外向下的斜切表面。
在申请人自己的在先美国专利No.4,930,644号中公开了一种可收缩的薄膜塑料容器，其中容器侧壁的一主体部分有一减薄的壁厚，以便随意收缩该侧壁。在美国专利No.4,865,211号中公开了一种整个侧壁的壁厚均匀的塑料瓶，其成形为能够通过将一部分侧壁套叠在另一部分侧壁内来收缩该容器。
在美国专利No.，4875,576号中公开了一种容器，其中侧壁的一中间段采用了一种风箱形结构，以便容器的收缩和展开。该专利还公开了在容器侧壁的第一和第二部分之间采用成螺旋状或呈角度的螺纹摺纹，以便于该侧壁的摺纹部分的收缩作用。
在美国专利No.4,873,100号中公开了一种双稳定可展开塑料瓶，其采用了一种在收缩和展开之间运动的风箱形侧壁。
在美国专利No.2,880,902号中公开了一种可收缩的饮水杯(或相机皮腔)，其中侧壁由交替的薄厚部分构成。
发明目的
本发明的目的是提供一种可重复使用重复收缩的容器和与之相配的可重复密封的盖。本发明的公开
本发明结合了现有技术中尚未发现的若干特征，并构成一种简单易使用、低成本的容器，其可由消费者随意使用和重新再用并可以一收缩状态贮存，从而扩大了贮放空间。同时，通过在侧壁的一中间部分显著地减小了容器侧壁的厚度，实现了制造容器所用塑料的用量减少。
一种可重复使用重复收缩的容器和与之相配的盖组件，其包括一个具有一由一环形边缘限定的开口上端的容器本体和一个具有一顶壁和一径向朝外的下垂裙部的盖，所述环形边缘具有一基本水平的最上边表面和一径向朝外向下延伸的斜切表面，和径向朝外的下垂裙部，所述径向朝外的下垂裙部由一内盖表面连接于所述顶壁，该内盖表面包括一向下向外斜切的表面部分，其与容器上的所述斜切表面接合，所述盖还包括一适合于所述容器本体的所述开口上端的一内表面接合的一径向朝内的下垂裙部，
所述内盖表面径向位于所述径向朝外和所述朝内的裙部之间，使当所述盖与所述容器本体之间完全螺纹接合时，所述基本水平的最上边表面与所述盖顶壁在轴向上间隔开。
本发明提供了一种单件挤出和吹塑成形的容器，其周边侧壁分为上、中间和下部分，上、下两部分的厚度显著地大于中间部分的厚度。例如，中间部分的侧壁厚度在大约50.8至约304.8微米(μm)之间，优选为大约203.2微米(μm)，以便当上、下两部分以上述套叠关系互相相对移动时该中间段可反向收缩，上、下各部分的壁厚在大约635-1524微米(μm)的范围内，优选为大约1143微米(μm)。
本发明的另一特征是，周边侧壁包括易于使容器轴向收缩和展开的表面轮廓。因此，在所公开的各实施例中，中间周边侧壁部分成形不具有一向内向下的锥形轮廓，即，在向下的方向上直径减小；而下部周边侧壁部分成形为具有一向下向外的锥形轮廓，即，在向下方向上直径增加。此外，在这三部分之间的交界面上，壁厚的变化提供了一对环形阶梯，实际上环形阶梯提供了一易于叠起或收缩作用的摺纹。锥形中间部分的最大和最小直径在上侧壁部分的下边缘和下侧壁部分的上边缘之间形成一径向间隙，从而在收缩和展开过程中上、中间和下侧壁部分之间有最小摩擦啮合，这也是易于收缩操作的一个原因。
在所公开的各实施例中的另一特征涉及在周边侧壁的下部的下端处提供一抓持区域，特别是设计成易于将容器从收缩位置拉起。
在一实施例中，容器的上侧壁部分的直径基本均匀，并结合有一相对刚性(但仍有挠性)的环形边缘。该边缘本身的厚度尺寸等于或略大于上、下侧壁部分。
在该实施例中，在与边缘相邻的容器的上端设有一适用于接纳一螺旋盖的外螺纹。按照本部分继续申请，邻接该容器边缘的最上边的表面呈向下向外的锥形，以提供一实际上斜切的边缘，以便与一相关的盖相配合，这在下面将详细讨论。按照本发明的独特的盖结构包括一顶壁和一径向朝内的下垂裙部，该下垂裙部的内表面上设有一适合于与容器的上端上设置的外螺纹相配合的螺纹。该盖结构还成形有一径向朝内的下垂裙部，其适于与容器上端的内表面接合，以便以在上述专利申请中描述过的方法支撑后者。按照本部分继续的申请关于盖结构的特别独特的方面涉及在径向朝内、朝外的下垂裙部之间的盖的内表面形状。该内表面包括三个表面部分。首先有一个与径向内环裙部相邻的基本上水平的表面，其径向向外延伸与一向下径向向外的第二倾斜表面相交，该第二表面又与一圆角的、与径向朝外的垂裙部相交的一第三表面汇合。此第二或倾斜表面(其基本上为直的)提供了一适于由容器的斜切的上边缘密封接合的密封区域，在二者密封接合时，在容器的最上边与盖上的邻接于径向朝内的裙部的第一基本水平面之间留有一轴向空间。
由于提供了在一锥形密封区域内接合并在密封时使盖的顶部和容器的最上边缘之间留有一轴向空间的配合面，一种有效的密封可以被重复进行，即使容器的最上端实际上并不象经过机械切削器或纵切器等机械修正过的吹塑容器通常的情形那样精确。此外可以理解，由于容器的薄壁结构以及随之而来的挠性，存在着容器径向弯曲从而使盖拱起并超出正常的密封接合的趋势。然而，由于沿着配合的锥形表面形成密封，即使盖真的拱起也可以保持密封，因为这种密封事实上在密封区域内是可调整的。
此外，由于这种容器在重复使用的，并由于其盖要重复地封盖在容器上并从容器上取下，每次拧紧盖时，都会将盖拉得离容器的上部边缘更近些。按照本发明的这种独特的密封结构也适应这种倾向。这就是由于已经说明过的在容器的整个使用寿命过程中，这种密封作用可以发生在沿该配合的锥形表面的密封区域内的不同的位置。
因此，广泛地讲，本发明涉及容器和与之相配的盖组件，其包括一个具有一由一环形边缘限定的开口上端的容器本体和一具有一顶壁和一径向朝外的下垂裙部的盖；该环形边缘具有一基本水平的最上边表面和一径向向外向下延伸的斜切表面；盖的径向朝外的下垂裙部由一内盖表面连接于顶壁，该内盖表面包括一向下向外倾斜的表面部分，其与容器上的斜切表面这样接合，使当盖与容器本体之间完全螺纹接合时，该基本水平的最上边表面与盖顶壁在轴向上间隔开。
在下面的详细描述中，可显而易见地看出本发明的其它目的和优点。
附图的简要描述
图1是本发明的一容器和一与其相关的盖的正视图；
图2是图1的放大了的局部视图；和
图3是图1所示容器处于收缩状态的侧视图。
实施本发明的优选模式
现在参考图1和2所示，按照本发明的一实施例的一挤出/吹塑成形的容器10总体上包括一底壁12和一大致从底壁12向上延伸的周边侧壁14。该容器可以由低密度聚乙烯(LDPE)、聚丙烯或其它适用的塑料制成。在此描述的实施例中，侧壁一般为环形的(当从沿容器的横截面上看时)，但该容器具有其它适当的形状也是可以理解的。该周边侧壁终止于一开口上端16处。
在本实施例中的周边侧壁14成形为包括三个轴向部分，一个上部18、一个中间部分20和一个下部22。上部18和中间部分20的轴向长度大致相似。然而，由于下面将描述的一个原因，下部22的轴向长度略大一些。侧壁部分18和22的厚度例如可以在大约635-1524微米(μm)的范围内，优选的大约1143微米(μm)。如果需要的话，底壁可以更厚一些。如在系列号No.08/047,185的专利申请中所描述的，中间侧壁部分20的厚度可以大约50.8-304.8微米(μm)之间，而优选的大约203.2微米(μm)。上、下侧壁部分各自的厚度与中间侧壁部分的厚度之比至少应为3.75比1，而优选的大约5比1。可以用在专利申请′185号中的方法将该容器收缩到图3所示的形状。
容器侧壁14的上端成形出一外螺纹24并终止于一上环形边缘26。上环形边缘26具有一基本水平的最上边28和一位于外部的、相对于基本水平的最上边28向下径向向外延伸的倾斜或锥形面30。
按照本发明的盖32包括一顶壁34、一径向朝外的下垂裙部36和一径向朝内的下垂裙部38。径向朝外的下垂裙部36在其内表面40上成形出一个适于与在容器的外表面上形成的螺纹24相配的螺纹42。正如在该专利申请中所解释的，径向朝内的裙部38被设计成为容器的上端提供径向支撑，从而在盖上盖时防止容器的任何径向向内的弯曲。然而，本部分连续申请特别着重于在径向朝内的裙部38和径向朝外的裙部36之间的盖的内表面的轮廓构造。从图2中最清楚地看出，在内、外下垂裙部之间的区域内的盖的内表面基本上由三个表面组成。首先有一基本上水平的径向向外扩展的表面44，其从内裙部38径向向外裙部36延伸。表面44事实上是顶壁34的延续(由顶壁的壁厚所限定)，其与一相对于表面44向下径向向外延伸的第二锥形或倾斜面46相交汇。第二表面46又与一圆角的第三表面48相交汇，该圆角的第三表面向径向上朝外的下垂裙部36延伸，二者的交界面由一倒圆50限定。圆角一须48保证了只沿在表面30和46的交界处的一密封区域形成角密封。
在本实施例中，盖的外径大约114.3毫米(mm)，而容器侧壁的外径大约为107.95毫米(mm)，第一表面44的径向尺寸大约为0.508毫米(mm)。第二表面46呈锥形，相对于水平面的角度大约为69.78度，且第三表面48被一大约为1.626毫米(mm)的半径所限定。当然，这些尺寸可随该盖及与其相配的容器的尺寸而变化。
当盖32如图2所示以完全螺纹啮合的位置旋紧在容器10上时，在容器边缘26的最上边28与盖32的水平面44之间有一轴向空间52。同时，在盖的锥形面46与容器边缘的倾斜或锥形面30之间有一密封接合。这两表面的轴向长度界定出一密封区域，即使重复使用该容器和与其相配的盖，也可重新沿各表面30、46使该密封区域重密封。换句话说，在多次重复加盖以后，有一种使盖相对该容器边缘“蠕动”动作起到调节作用，这样就使密封发生在该两表面的中心线接触面上，该中心线可在该密封区域内变化。这种结构还使得由于加盖时一旦旋转盖的用力过大而使盖32略微向上弯曲情况下仍能保持理想的密封。
应理解，按本部分连续申请中所描述的能重复密封的特征可以结合到任何采用一种螺旋将一个盖固定于容器上的挠性容器结构(可收缩的或不可收缩的)中，这包括(但不限于)，例如，在专利申请′185号中所公开的附加实施例。
虽然本发明是结合目前认为是最实际和最优选的实施例进行描述的，但应理解，本发明并不限于所公开的实施例，相反，本发明试图覆盖包括在所附的权利要求的精神和范围内的各种修改和等同结构。

Claims (6)

1.一种可重复使用重复收缩的容器和与之相配的盖组件，其包括一个具有一由一环形边缘限定的开口上端的容器本体和一个具有一顶壁和一径向朝外的下垂裙部的盖，所述环形边缘具有一基本水平的最上边表面和一径向向外向下延伸的斜切表面，和径向朝外的下垂裙部，其特征在于，所述径向朝外的下垂裙部由一内盖表面连接于所述顶壁，该内盖表面包括一向下向外斜切的表面部分，其与容器上的所述斜切表面接合，所述盖还包括一适合于所述容器本体的所述开口上端的一内表面接合的一径向朝内的下垂裙部，所述内盖表面径向上位于所述径向上朝外和所述朝内的裙部之间，使当所述盖与所述容器本体之间完全螺纹接合时，所述基本水平的最上边表面与所述盖顶壁在轴向上间隔开。
2.如权利要求1所述的容器和与之相配的盖组件，其特征在于：所述内盖表面包括一从所述径向朝内的裙部径向向外延伸并与所述向下向外倾斜的表面部分相交汇的基本水平的表面部分。
3.如权利要求2所述的容器和与之相配的盖组件，其特征在于：所述向下向外倾斜的表面部分与一连接于所述径向朝外的下垂裙部的园角表面部分相交汇。
4.如权利要求1所述的容器和与之相配的盖组件，其特征在于：所述容器本体包括：
一底壁和一相对挠性的、从所述底壁向所述环形边缘向上延伸的周边侧壁，所述侧壁可轴向地在伸展和收缩位置之间运动，在伸展位置，具有相对较厚的上、下侧壁部分和一相对较薄的中间侧壁部分；其中，所述中间侧壁部分呈向下径向向内的锥形，所述下侧壁部分基本上至所述底壁呈向下径向向外的锥形，使在所述收缩位置上所述下侧壁部分部分地套叠在所述上侧壁部分内，而所述中间部分在二者中间反向收缩，并且所述下侧壁部分的一最上边在径向上与所述上侧壁部分间隔开。
5.如权利要求4所述的容器和与之相配的盖组件，其特征在于：所述盖还包括一适合于与一所述容器本体的所述开口上端的一内表面接合的径向朝内的下垂裙部。
6.如权利要求1所述的容器和与之相配的盖组件，其特征在于：所述向下向外倾斜的表面基本上为直的。
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Also Published As

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WO1995010456A1 (en) 1995-04-20
EP0722407A1 (en) 1996-07-24
CA2174102A1 (en) 1995-04-20
US5549213A (en) 1996-08-27
JPH09503469A (ja) 1997-04-08
AU7926794A (en) 1995-05-04
EP0722407A4 (en) 1997-11-19
CN1137256A (zh) 1996-12-04

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