CN1550421A - 一种具有挠性中心板的容器密封盖 - Google Patents
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Abstract
一种可安装到敞口容器边沿的密封盖,这种密封盖包括单独制成并紧密结合到基本为刚性的外缘安装环上的挠性中心板,所述安装环可卡扣安装到容器边沿,中心板可相对容器内部选择向内和向外挠曲,通过改变密封盖内的顶部空间来适应过满和不满的容器状态。
Description
发明领域
本发明广义地涉及通常用于厨房环境中存储食品的容器。具体地,本发明涉及用于这种容器的密封盖。
背景技术
传统密封盖大部分卡扣到容器边沿,根据具体密封盖的特性,具有特定的优点,包括有效的密封性、容易安装和/或取下、适应过载容器的能力等等。
对于所关心的现有技术,2001年7月17日授予Mitchell等人的美国专利No.6,260,729B1公开了一种单件的高度弹性的密封盖,其中波状中心板和整体形成的周缘凸台可向外弹性伸展以配合不同尺寸和形状的容器,并能侧向伸展以适应突出到容器顶部边沿以上的食物。一种类似的产品由名为EMSA的公司销售,这是一种具有整体形成的周缘凸台的松弛薄片,形式上非常近似于游泳帽或淋浴帽,不论容器结构形式如何变化都可以伸展扣到容器的顶部。
注意到1972年7月25日授予Swett等人的专利3,679,088和1972年9月19日公告授予Croyle等人的专利3,692,208介绍了一种单件密封盖,其中心板可轻微挠曲以帮助安装密封盖。
发明内容
为了得到优越的密封盖,本发明提出了一种密封盖,其对用户十分方便,并独特地通过调整容器顶部空间的有效变化来适应过满和不满的容器状态。换句话,如果容器内的食品突起到容器边沿以上,那么密封盖,更具体地其挠性中心板,将向上弹性挠曲或变形以围绕过满的食品。如果容器内产品所占据的空间小于该容器的全部容量,只需用手向内压下挠性中心板进入容器中,可减小顶部空间并强行将空气从顶部空间排出。当释放面板的向下推力时,因为空气排出而产生的部分真空或负压将阻止挠性面板弹性恢复到平衡位置。基本上,通过形成部分真空,环境压力或容器外面的压力将大于容器内的压力。因此,密封盖的中心板将保持向内挠曲而处于使顶部空间减小的压下状态,从而实现可保持容器中容纳物稳定的优点,并能实现通过形成部分真空或负压所具有的其它优点。
本发明优越的密封盖,除了挠性中心板之外,还特别设有刚性或基本上刚性的周缘安装环,单独制成的中心板最好通过熔化粘结固定到安装环上。
该安装环具有固定的可维持预定形状的结构,而且可以通过与传统容器密封盖十分类似的方式卡扣安装在结构形式和尺寸一致的容器边沿上。安装环的刚性或基本上刚性的特征使其具有固定的结构形式,很小程度的侧向弹性弯曲性使其能够卡扣到容器边沿上。还使得在将密封盖安装到不满容器时可以产生通常所称的“排气”作用。无需进行困难的拉伸或其它操作,熟悉传统容器密封盖的使用者在安装和取下本发明的改进密封盖时同样不会遇到任何困难。
该挠性中心板无论是自动挠曲来适应过满状态还是手动挠曲来适应不满状态都将相对刚性安装环独立挠曲。
作为适合密封盖的材料的实例,可以使用带有聚对苯二甲酸丁二醇酯(PBT)环的硅树脂中心板。这些材料适合进行模制。其它材料包括带有聚丙烯(PP)环的热塑性氨基甲酸乙酯(TPU)或热塑性人造橡胶(TPE)中心板。当然也可以使用具有本发明密封盖所要求特性的其它适当的材料。
通过下文中更加完整的说明将使本发明的其它细节、目的和优点变得更加清楚。
附图说明
图1是安装有根据本发明的密封盖的容器的透视图;
图2是沿图1中2-2剖面的剖视图;
图3是显示中心板侧向朝安装环内变形以减小容器顶部空间的剖视图;
图4是图2中标为图4区域的放大图;
图5是沿图1中5-5剖面的放大剖视图,所示剖面通过中心圆形装饰;
图6是与图5类似的剖视图,显示圆形装饰的一种替代形式;
图7是装配之前的圆形装饰的底视透视图;
图8是安装在容器边沿的密封盖的一种修改形式的正视图;
图9是通过图8中结构的截面图;和
图10是图9中标为图10的结合区域的放大剖视图,示出了中心板和安装环之间的结构。
具体实施方式
现在具体地参考附图,如图1所示,密封盖10安装在传统容器12上,传统容器12通常用适当的刚性合成树脂类材料制成,其上边沿部分14构成容器12的敞开开口。容器12的形状,具体说是边沿14的尺寸和构造,将限定密封盖的结构,所述密封盖能够以下面将介绍的方式卡扣到容器边沿。
密封盖10基本上由两个部件组成,即大体上刚性的周缘安装环16和挠弹性中心板18。虽然术语“环”指的是密封盖10的基本刚性的边缘或唇缘部件16,但是应当认识到该“环”不限于圆形结构形式,而是可根据容器边沿14构造具有其它任何适当的形状,包括椭圆形、矩形等类似形状。
具体参见图4的细部剖视图,安装环16包括竖直侧壁20、从侧壁向内延伸的整体形成的上凸缘22、以及从侧壁20的下端朝外弯的整体形成的下凸缘24。侧壁20的内表面26朝上端略微缩进,符合容器边沿14略微向外倾斜的外表面。安装环16的构造和尺寸能够如同传统的容器和密封盖组合一样,通过圆环16的轻微挠曲和/或容器边沿14的相应轻微挠曲,将安装环16卡扣到容器边沿14上。这样安装后,侧壁20的内表面26密封到容器边沿14的外表面。这样定位时,为了提供额外密封,容器边沿14的上缘28顶住与之相对的上凸缘的下表面30。作为下凸缘环24延伸部分的整体形成的把握突耳25可使取下密封盖变得更为容易。
环侧壁20内侧的内凸缘22部分向上偏移,形成朝下开口的凹槽32,与内凸缘的下表面30接合的容器边沿限定于其中。朝上的支承座34延伸到内凸缘22的内端36。支承座34的内端构成支承面38,其向上延伸成为保护凸台40。上凸缘22的围绕环16的向内突出部分虽然足以使内凸缘22的内边36与圆环侧壁20的内表面26及容器边沿14形成向内隔开的关系,但是如图中所示,只是沿径向向内延伸安装环16直径的很小部分。
静止的挠性中心板18具有这样的结构方式,其周缘部分42置于圆环支承座34上,与其在全部径向宽度上接合,而且在略微低于保护性凸台40之处与支承座形成的支承面38接合。该周缘部分42还包括悬下的环形凸台或凸台部分46,当周缘部分42完全位于凸缘支承座34时,凸台46与上凸缘22的内边36接合。如图4详细地显示,凸缘内边36和凸台46可以具有互补的平面倒角边48以形成更大和更为有效的接触面。这一点尤其重要,因为如下面所要介绍的,在此区域,挠性中心板将相对安装环独立挠曲。
当按上述方式定位时,重叠的凸缘支承座34和中心板周缘部分,包括接合的斜面48,通过熔化粘结或其它任何适当的粘结方法紧密地结合在一起。虽然这种构造方式中的部件之间有独特的相互关系,因而附带有许多优点,但是密封盖10能够以传统容器密封盖的方式安装,即通过对周缘安装环手动加压将密封盖10卡扣到适当的位置。
中心板18是用适当模压的可侧向挠曲的挠性材料制成,相对安装环16和由安装环内凸缘22的内边36形成的中心面,可向上挠曲适应容器12的过满状态,可向下挠曲适应容器12的不满状态。这种挠曲相对于安装环发生在凸缘内边36以内,因而不会引起安装环任何相应的分裂。这明显不同于现有技术的某些更加刚性的中心板,现有技术的中心板在有些情况下手动挠曲变形,这样做专门为了使密封盖的密封周缘产生相应挠曲以更加容易地安装密封盖或取下密封盖。
当安装环与容器边沿卡扣接合时,挠性中心板将向上挠曲而使其适应于过满状态下的高度和形状。在未装满的情况下,安装密封盖之后手动向下按压中心板,迫使空气从顶部空间通过安装环和容器边沿之间正常密封的密封面排出,即“排气”。当中心板的手动向下压力释放时,朝下挠曲的中心板由于部分真空或负压固定在适当位置,该部分真空或负压是由于空气从顶部空间排出而安装环又重新密封而产生的。因此,通过简单而有效的方式获得了顶部空间减小带来的所有优点,包括容纳物稳定、保存期增加、部分真空环境等等。
作为安装密封盖以适应未装满情况的可能替代方式,可以压下中心板,然后在用手保持这种状态的同时将圆环卡扣到容器边沿。安装之后,中心板由于材料弹性记忆的结果将倾向于朝上移动,从而产生所要求的部分真空或相对于环境大气压力下降的压力。这种部分真空或负压使中心板保持压下的状态。
具体参见图1和2,应当认识到中心板18的挠曲性及其侧向挠曲的范围可通过设置一系列同心波纹或沟纹50得到加强,波纹50的直径从中心板的中心区域向外逐渐增大。当中心板的垂直方向位置由于容器中过满的容纳物或手动压力而发生变化时,这些波纹或沟纹将以一种公认方式弹性和柔性地扩展。中心板的竖向挠度可以设想大约为密封盖直径的三分之一。
为了便于在未装满情况下施加平衡及均匀分布的手动压力,中心板18的中心区域52最好设置带有铭文的圆形装饰54形式的刚性盘,如图1-3和5所示。圆盘可以任何适当的方式比如通过熔化粘结固定到中心区域。
参见图6和7,作为一种变化,圆盘或圆形装饰55中的铭文可以通过使平面中心区52的面板材料向上流过重叠的圆形装饰主体中的贯通孔56,然后进入圆形装饰上表面用字母形成的凹部58来构成。在这种方法中,圆形装饰55可通过熔化粘结或类似方法固定到中心板,而中心板18的材料构成了圆形装饰54上表面可看到的铭文。如果铭文由分开的不相连的字母组成,应当知道每个字母可设置一个通孔或流道56,使流动材料在模制过程中从那里通过。
如图5、6和7所示,圆形装饰的底面最好包括连续的固定和稳定悬垂突肋60,其可加强圆形装饰与中心板的中心区之间的结合。
现在具体参考图8、9和10,其中示出了密封盖的第二个实施例。在此实施例中,沟纹或波纹64比前面介绍的波纹更平坦和更宽,前面介绍的波纹是具有相同交替峰谷的规则沟纹。而波纹64的横断面不是恒定的,其在相对边缘66处较窄,边缘66接触相邻波纹而形成相对较薄的波谷68。通过这种构造方式,该挠性中心板虽然具有相对较浅或较平坦的断面形状,但是能够相对于容器和安装环70显著挠曲。应当注意到与圆环16类似的安装环70包括向内的上凸缘72、大体上直立或垂直的侧壁74和侧向向外的下凸缘部分76。向内延伸的上凸缘72带有平面下表面,其从内端78延伸至直立侧壁74略微缩进的内表面。中心板62的周缘部分82重叠在安装环70上并沿内凸缘72的下表面、侧壁74的内表面80和外凸缘76的下表面的整个范围紧密地结合,其中周缘部分的末端84紧靠从外凸缘76悬垂的向下唇缘86以提供对边缘84的保护性装饰。类似地,上凸缘的端部78紧靠中心板的向上拐弯部分,此时中心板的周缘部分82结合到第一个波纹64。通过这种方式,接合在粘结的安装环70和容器边沿部分88之间的中心板周缘部分82的挠性材料强化了密封盖与容器的密封。
如同首先介绍的实施例一样,中心板的挠曲相对安装环发生在上凸缘72的内缘以内并且与安装环无关,因而不会影响安装环的密封或定位。根据需要,中心板62的中心区域还可以设有刚性或基本刚性的圆盘,或者可以设有与第一个实施例中圆形装饰54类似的圆形装饰。
从上述介绍可以认识到本发明对用户十分方便,因为密封盖是以传统密封盖的方式安装和从容器取下,同时本发明在适应过满和不满容器方面具有显著的优点。在要适应不满容器情况下,只需以传统方式安装密封盖然后压下挠性中心板,这个动作减小了顶部空间并产生部分内部真空或负压,其优点是可保持产品稳定并增加产品保存期。
以上只是对本发明原理说明。虽然已经介绍了一些具体实施例,但是所属领域的技术人员应当可以想到所附权利要求范围内的其它实施方式,这些实施方式也认为属于本发明的范围。
Claims (20)
1.一种可取下地安装到容器边沿的密封盖,所述密封盖包括基本上刚性的周缘安装环和挠性中心板,所述安装环具有围绕所述中心板的可维持预定形状的结构形式,所述挠性中心板带有结合到所述环的周缘部分,所述中心板可相对所述环沿相对方向侧向挠性变形,使所述中心板相对下面的容器在所述安装环上方或下方产生有效高度变化。
2.根据权利要求1所述的密封盖,其特征在于,所述中心板可弹性变形。
3.根据权利要求2所述的密封盖,其特征在于,所述中心板可独立于所述安装环挠性变形,使所述安装环保持所述预定的结构。
4.根据权利要求3所述的密封盖,其特征在于,所述安装环包括可围绕并接合容器边沿的直立侧壁和整体形成的环形凸缘,所述凸缘相对所述侧壁向内延伸,可相对下面的容器边沿向内延伸并覆盖在上面,所述凸缘形成内边,所述中心板的所述周缘部分重叠并结合到所述凸缘,所述中心板可相对所述凸缘向所述凸缘内边内部挠曲。
5.根据权利要求4所述的密封盖,其特征在于,所述中心板在所述凸缘处包括紧靠并结合到所述凸缘内边的支承面。
6.根据权利要求4所述的密封盖,其特征在于,所述中心板包括间隔的同心波纹以增强挠曲性和挠曲变形的程度。
7.根据权利要求6所述的密封盖,其特征在于,所述中心板包括中心区,限定了施加到所述中心板的向下变形压力的位置,所述中心板还包括刚性盘,所述刚性盘覆盖并结合到所述中心区,以均匀化施加到所述中心板的压力。
8.根据权利要求6所述的密封盖,其特征在于,所述波纹由高度大致相同的波峰和波谷构成。
9.根据权利要求6所述的密封盖,其特征在于,所述波纹包括低断面的波峰,每个所述波峰的断面厚度随接近边缘而变窄,在波峰之间形成波谷。
10.根据权利要求9所述的密封盖,其特征在于,所述波峰之间形成的所述波谷的断面厚度小于在两侧的所述波峰的断面厚度。
11.根据权利要求4所述的密封盖,其特征在于,所述中心板的所述周缘部分位于所述凸缘之下并延伸至所述侧壁,所述周缘部分结合到所述凸缘和所述侧壁,并可位于所述凸缘和所述侧壁之间,从而在所述安装环和安装了所述环的容器边沿之间提供强化密封。
12.根据权利要求3所述的密封盖,其特征在于,所述中心板包括中心区,所述中心区限定了施加到所述中心板的向下变形压力的位置,所述中心板还包括刚性盘,所述刚性盘覆盖并结合到所述中心区,以均匀化施加到所述中心板的压力。
13.一种安装在容器边沿可改变所述容器内顶部空间的密封盖,所述密封盖由挠性中心板和基本为刚性的围绕所述中心板的周缘安装环组成,所述中心板具有结合到所述环的周缘部分,所述中心板可相对所述环侧向挠曲和定位,相对下面的容器朝所述环的上方或下方变形,从而改变下面容器内的顶部空间。
14.根据权利要求13所述的密封盖,其特征在于,所述基本刚性的安装环包括沿径向向内突出的上凸缘,所述上凸缘可覆盖接收所述密封盖的容器边沿,所述凸缘向所述容器边沿内延伸,所述中心板的所述周缘部分重叠并结合到所述凸缘,所述中心板在所述凸缘内独立于所述凸缘和安装环挠曲,不会使所述凸缘和安装环变形。
15.根据权利要求14所述的密封盖,还包括在所述挠性中心板形成的一系列大体上同心的波纹,以增加所述中心板的挠曲性和运动范围。
16.根据权利要求15所述的密封盖,其特征在于,所述中心板包括中心区,所述中心区限定了施加到所述中心板的向下变形压力的位置,所述中心板还包括刚性盘,所述刚性盘覆盖并结合到所述中心区域,以均匀化施加到所述中心板的压力。
17.根据权利要求13所述的密封盖,其特征在于,所述安装环包括可将所述密封盖沿周边密封到容器边沿的机构。
18.一种密封盖和容器组合,基本上刚性的敞口容器具有构成开口的边沿,所述密封盖包括能够可释放地密封到所述容器边沿的基本刚性的外缘安装环,挠性中心板沿周边结合到所述环以覆盖所述容器的所述开口,所述中心板可相对所述基本刚性的安装环独立挠曲,所述中心板可相对所述容器向外挠曲以扩大容器顶部空间来适应容器的过满状态,所述面板可相对所述容器向内挠曲以减小不满容器的容器顶部空间。
19.根据权利要求18所述的密封盖和容器组合,其特征在于,所述中心板是挠性的,因而向内挠曲时可使所述容器产生部分真空,所述部分真空使所述中心板维持向内挠曲,保持减小的顶部空间。
20.根据权利要求19所述的密封盖和容器组合,还包括在所述挠性中心板形成的一系列大体同心的波纹,以增加所述中心板的挠曲性和运动范围。
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- 2004-03-15 AT AT04006143T patent/ATE431300T1/de active
- 2004-03-15 EP EP04006143A patent/EP1468933B1/en not_active Expired - Lifetime
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- 2004-03-15 DK DK04006143T patent/DK1468933T3/da active
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- 2004-03-19 NO NO20041168A patent/NO328164B1/no not_active IP Right Cessation
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- 2004-03-29 JP JP2004095382A patent/JP4041084B2/ja not_active Expired - Fee Related
- 2004-03-30 TW TW093108715A patent/TWI319758B/zh active
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