CN101362537A - 调节压力变化的食品容器及其制造方法 - Google Patents
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Abstract
本发明涉及调节压力变化的食品容器及其制造方法,其中公开了一种食品容器,适合于气体便利地向着和/或者从食品容器主体内部流通。该食品容器包括容器主体,盖子和密封膜。至少一个跳跃封口或缝隙形成于密封膜和容器主体之间便于通风。在该至少一个跳跃封口形成过程中,位于盖子或容器边沿内的凹口减轻了跳跃封口处的压力,从而减少或消除跳跃封口被无意中封闭的情况。
Description
技术领域
公开了适于调节压力变化的食品容器,和制造该容器的方法。特别地,公开了具有密封到容器边沿的密封膜的食品容器,所述容器在封口处具有用于容器内外通风的缝隙。
背景技术
一种类型的食品容器具有容器主体,其具有由底壁,直立的侧壁和开放的上端部限定的内部。开放的上端部可具有一个例如带有外螺纹的颈部,和一个朝上的边沿。一个损坏显示件或密封件,可密封该边沿来盖住该容器主体的开放的上端部,并且,在某些情况下,可提供直观的损坏迹象。盖子可放置在密封膜上,并且可具有一个带有下垂裙部的闭合壁。该裙部可具有内螺纹,用于与容器主体颈部的外螺纹相匹配。
如果密封膜完全密封住所述边沿,那么任何在容器主体内部存在的气体或产生的气体可导致容器侧壁变形。当食品容器穿越高海拔,例如穿越高山而运输时,上述情况尤其存在。除了由于膨胀导致的变形,如果容器内部与容器外部相比有一个压力下降,容器主体也会向内变形。容器主体的变形是不希望发生的,并且可导致容器具有在视觉上无吸引力的外表。如果变形足够,也会使得密封膜从所述边沿破裂,导致产品显示出已经被损坏。
为了解决与容器主体变形相关的问题,在过去,跳跃封口用在密封膜和容器主体边沿之间。跳跃封口是在密封中的一个小的缝隙,在密封膜和容器主体边沿之间,设置成允许气体进入和离开容器主体的内部。
将密封膜粘结到容器主体边沿上的一种方法是通过使用感应加热。在感应加热中,压力施加于密封膜的表面,促使密封膜抵接于容器主体边沿。压力可通过使用盖子的突起或其他构型部来施加。随着压力的施加,该食品容器被传送通过一个感应加热器,该感应加热器使得密封膜密封在容器边沿由盖子施加压力的区域上。
盖子的压力施加部被认为是设计成仅在特定区域施加压力,因而密封膜不会在全部的容器边沿进行密封,从而形成跳跃封口。然而,密封膜和容器主体边沿之间的密封会不经意地产生,这会封闭跳跃封口并导致容器主体被密封膜完全密封住。例如,如果密封膜具有一个比容器主体边沿外围大的尺寸,在通常情况下都是如此,那么密封膜的边缘就会不经意地密封在容器边沿并且封闭了原本想要的跳跃封口。在这个例子中,盖子可将压力施加在密封膜延伸过边沿的部分上,并导致密封膜在边沿处或相邻于边沿处而密封,导致封闭住了跳跃封口。封闭的跳跃封口可导致上述讨论的不希望的容器体的变形。
发明内容
公开了一种食品容器,适合于气体便利地向着和/或者从食品容器主体内部流通。该食品容器包括容器主体,盖子和密封膜。在密封膜和容器主体之间成型有至少一个跳跃封口或缝隙以便于通风。由于压力密封程序使得至少一个凹口形成在盖子和/或容器主体边沿上,所以所述的至少一个跳跃封口会自动地排列,减少或避免了无意地对跳跃封口的封闭,从而便于从容器主体内通风。
容器主体可具有一个内部和一个由颈部和镶边边沿所围绕的开放端部。可通过感应密封或冷密封将密封膜密封到容器主体颈部的镶边边沿上以盖住容器主体的开口端部。容器的盖子可具有一个闭合壁和一个悬垂裙部,该悬垂裙部的大小适合于环绕容器的颈部。密封缝隙或跳跃封口设置在密封膜和镶边边沿之间,并与形成于盖子的裙部和/或容器边沿上的一个凹口对齐,以通过在密封膜和与密封缝隙相邻的或至少部分地与密封缝隙同延的容器主体边沿之间减轻压力,可减少或避免无意地对密封缝隙的封闭。
所述闭合壁具有面对容器主体边沿的内表面。一方面,一个凸肋可设置在该内表面外围上,该凸肋在密封膜与位于密封膜和容器主体镶边边沿之间的密封缝隙相对的一边具有一个缝隙。另一方面,盖子的内表面具有一个通道或其他凹部贯穿于内表面的外周。在感应或冷密封中,该凸肋或外周可在密封膜上施加压力将其密封在容器主体的边沿上。盖子的凹口可与密封缝隙对齐,从而在密封缝隙形成过程中,盖子不会在密封缝隙的相邻处施加压力而无意地形成封闭的密封缝隙。在另一个方面,凹口可在容器主体边沿内形成,在密封缝隙附近的过程中可减轻压力从而减少或避免无意地对密封缝隙的封闭。也就是说,该凹口可形成在边沿的镶边部内和/或表面下的边沿的向外径向镶边部内。另一方面,在盖子和容器边沿上都可设置校准好的凹口,从而进一步减少或避免密封缝隙附近的压力。
还公开了一种使用密封膜盖住食品容器开口端的方法。该方法包括将密封膜定位在盖子和围绕容器开口端的边沿之间。该方法还包括将密封膜感应密封或冷密封到食品容器边沿上,并将一个或多个密封缝隙设置在食品容器边沿和密封膜之间,以允许在边沿和密封膜之间的通风。该方法还包括将一个或多个形成在盖子裙部和/或容器主体边沿部的凹口与一个或多个密封缝隙由于压力密封过程而对齐起来,以减小盖子、密封膜和容器主体边沿之间的压力,从而减少或避免无意的对密封缝隙的封闭。
附图说明
图1是食品容器的分解侧面正视断面图,带有密封膜和盖子;
图2是在密封膜和图1所示的食品容器边沿之间的理想密封的视图,示出了打开的密封缝隙;
图3是现有技术中密封视图,密封发生在密封膜和图1所示的食品容器的边沿之间,示出了封闭的密封缝隙;
图4是图1所示的食品容器盖子的透视图;
图5是图1所示的密封膜的分解透视图;
图6是图4所示的盖子下边的局部分解透视图,示出了盖子裙部上的凹口;
图7是图4所示的盖子下边的平面图,示出了盖子裙部上的凹口;
图8是图4所示的带有凹口的盖子与密封膜和容器主体结合在一起的局部断面图;
图9是与图8相似的局部断面图,示出了现有技术中不带有凹口的盖子;
图10是盖子的另一个实施例中下边的局部透视图,示出了盖子裙部内的凹
口;
图11是图8所示的盖子下边的平面图,示出了盖子裙部内的凹口;
图12是图10所示的带有凹口的盖子与密封膜和容器主体结合在一起的局部断面图;
图13是与图12相似的局部断面图,示出了现有技术中不带有凹口的盖子;
图14是图4所示带有密封膜的盖子的断面图;
图15是不带有凹口的盖子的横断面图,并且密封膜用于边沿处带有凹口的容器主体上;和
图16是在边沿上带有凹口的容器主体的局部透视图,其与图4或15所示的盖子一起使用。
具体实施方式
图1-16描述和图示了一种适合于气体便利地向着和/者从食品容器主体内部流通的食品容器。如图1所示,食品容器10包括容器主体20,盖子40和密封膜30,密封膜30采用感应密封或冷密封的方式密封到容器主体20的边沿26上。为了便于通风,在密封膜30和容器主体20的边沿26之间形成至少一个跳跃封口或缝隙26。跳跃封口52和形成在盖子上的凹口48对齐,以用来在压力密封操作时减轻盖子40、密封膜30和容器主体20之间的压力,从而减少或避免密封膜30和容器主体20之间的缝隙52被无意中封闭。
容器主体20包括底壁22,竖直的侧壁24和颈部28。颈部28包括密封膜30可附着其上的镶边边沿26。为了将密封膜30密封到容器主体20的边沿26上,使用盖子40向密封膜30的背面施加压力。压力被施加在密封膜30和盖子40之间需要被密封的位置,例如区域54。为了形成跳跃封口或缝隙52,盖子40下侧的形态被设置为不施加与需要密封的区域54上相同程度的压力。虽然在一些情况下,缝隙52会因这样的密封过程而打开,如图2所示,但是在另外一些使用现有技术中的盖子的情况下缝隙52是闭合的,如图3所示。导致缝隙52闭合的情况包括密封膜30的尺寸大于边沿26的周长,这可导致来自现有技术中的盖子侧壁部的压力,这种压力会形成局部密封。另外一些情况被认为是由制造公差引起的典型的变化造成的,例如,密封膜30偏离了中心或者没有和边沿26对齐。
图4,6-8和10示出了盖子40的一个具体实施例,盖子40包括闭合壁42和悬垂在闭合壁42边沿的裙部44。盖子40可包含一个或多个铰链部件,通过它们可以在不将盖子40从容器主体20的颈部28上移除的情况下获取容器10内存储的物品,如图4所示。裙部44的内面上有多个突起56用来在感应密封或冷密封前保持密封膜30,如图14所示。盖子40上具有螺纹,用于和容器主体20的颈部28上形成的螺纹配合。盖子40的闭合壁42的下侧有一条沿着壁42的直径从裙部44的一侧延伸到另一侧的通道46,如图6和7所示。在通道的任一侧是一个相对凸起的外围50。在感应密封或冷密封的过程中,壁42下侧的凸起的外围50向密封膜30施加压力,将密封膜30和容器主体20的边沿26压紧,从而形成密封区域54。在将密封膜30密封到容器主体20的边沿26上的过程中,在通道46和侧壁44相交的位置形成了缝隙52。盖子40的侧壁44上的凹口48和通道46对齐,以在该位置减轻盖子40、密封膜30和边沿26之间的压力从而减少或防止在压力密封过程中缝隙52被无意中封闭,如图8所示。凹口48可以是盖子的侧壁44上的一个缩小的或者变薄的交叉区域,它可以是任何有助于压力减轻的形状。凹口48可以延伸侧壁44的长度作为一个通风通路,但这不是必需的。相反,如图9所示,在压力密封过程中,现有技术中的不具有凹口48的盖子具有会向密封膜的悬垂部施加压力的盖子的侧壁,从而无意中造成了密封缝隙的封闭,阻碍了通风。
图10-12给出了盖子140的另一个具体实施例,盖子140包括闭合壁142和悬垂的裙部144。壁142的下侧是一条设置在凸起的外围150之上的凸肋146。凸肋146具有多个由缝隙隔开的段。凸肋146配置成向密封膜30施加压力,在感应密封或冷密封的过程中将密封膜30和容器主体20的边沿26压紧。凸肋146各个段之间的缝隙被调整以形成密封膜30和容器主体20的边沿26之间的密封区域54上的缝隙52。凹口148沿着侧壁144的高度方向延伸,如图10所示,还包括穿过外围150和凸肋146的缝隙的段。凹口148减轻了盖子40、密封膜30和容器主体20的边沿26之间的压力,从而减少或消除了压力密封过程中对缝隙52的封闭,如图12所示。相反,如图13所示,现有技术中的缺少凹口48的盖子具有会向密封缝隙附近施加压力的侧壁从而使密封缝隙被封闭,阻碍了通风。
密封膜30可以是适合感应密封或冷密封的压层薄膜。图5所示的是用于密封容器主体20的边沿26的压层薄膜的一个示例,该层压薄膜具有聚乙烯薄膜顶层32、聚乙烯泡沫层34、衬层36和可热密封的聚乙烯层38。可以从UNIPAC,Aurora,Ontario,Canada获得一种合适的叫做LIFT’N’NPEELTM的压层薄膜,产品号为ISCT-U5。顶层32的一部分可以是不粘的或很容易从紧邻层上移除,顶层上提供了一个拉片(pulltab)以便于将密封膜30从容器主体20上移除。对于一个感应密封的过程,适合的感应密封器由Enercon Industries,Menomonee Falls,Wisconsin制造。
为制造这里所描述的食品容器10,容器主体20能够被装填入例如搓碎干酪之类的食品。密封膜30可以被插入盖子40的下侧,并由突起56保持住。盖子40能够通过例如螺纹紧固在容器主体20的颈部28上,以将密封膜30定位在容器主体20的边沿26的位置上。盖子40或140的下侧结构,例如凸肋146或凸起的周边50,向密封膜30施加压力,使其在密封区域54内紧压边沿26。食品容器10被传送过一个感应密封单元,密封膜30的密封层38被加热,在密封区域54内,密封膜30被粘合在容器主体20的边沿26上,形成了密封缝隙52用于通风。为了减轻密封缝隙52处的压力,在压力密封过程中,盖子40或140中的凹口48或148对齐密封缝隙52来减小盖子40或140、密封膜30和容器主体20之间的压力,从而减少或消除密封缝隙52被无意中封闭的情况。
虽然凹口48或148可以位于盖子40或140中,但是凹口248可以将它们替换或者额外地成型在容器颈部228的边沿226上,如图16所示。一个传统的盖子240,如图15所示,或者一个带有凹口的盖子都可以和一个具有凹口248的容器颈部228配合使用。凹口248可以只在边沿226的面上延伸,或者同时在边沿226的面和边沿226的径向外侧面上延伸,如图16所示。凹口248和密封缝隙52对齐以减少密封缝隙52附近的压力,从而减少或消除密封缝隙52被无意中封闭的情况。
本文的附图和前述的说明并不代表食品容器构造细节和制造工艺的唯一方式。形式的变化或部件的某一部分的改变,以及等价部件的替代,都是情况需要或者是出于便于绘图的考虑;虽然这里采用了一些专用术语,但只是为了更具通用性和描述性,而不是为了对描述内容进行限制。
Claims (20)
1、一种食品产品容器,包括:
容器主体,具有内部和带有边沿的开放端部;
容器盖子,具有闭合壁和悬垂裙部,该悬垂裙部的大小适合于围绕容器的颈部;
密封膜,该密封膜被感应密封于容器主体颈部的边沿以将开放端部覆盖住;和
位于密封膜和镶边边沿之间的密封缝隙,以允许气体从和向着容器主体内部流通,并且该密封缝隙与形成在盖子裙部和/或边沿内的凹口对齐,在密封膜、盖子和边沿之间减轻压力。
2、据权利要求1所述的食品产品容器,其中闭合壁具有面对着容器主体的边沿内表面,凸肋绕其外围设置在该内表面上,该凸肋在密封膜与位于密封膜和容器主体镶边边沿之间的密封缝隙相对的一边上具有缝隙。
3、根据权利要求2所述的食品产品容器,其中凹口与缝隙对齐,凹口形成在盖子的裙部内。
4、根据权利要求2所述的食品产品容器,其中凹口形成在容器主体的边沿内。
5、根据权利要求2所述的食品产品容器,其中密封膜是层压膜,具有面对着容器边沿的热密封材料层。
6、根据权利要求2所述的食品产品容器,其中设置有多个密封缝隙和多个凹口。
7、根据权利要求1所述的食品产品容器,其中闭合壁具有面对着容器主体边沿的内表面,通道绕外周部设置在内表面上通道,该通道位于自密封膜与容器主体镶边边沿之间的密封缝隙的密封薄膜的另一侧。
8、根据权利要求7所述的食品产品容器,其中该通道沿着闭合壁内表面的直径延伸。
9、根据权利要求7所述的食品产品容器,其中凹口与通道对齐,凹口形成在盖子的裙部内。
10、根据权利要求7所述的食品产品容器,其中凹口形成在容器主体的边沿内。
11、根据权利要求7所述的食品产品容器,其中密封膜是层压膜,该层压膜具有面对着容器边沿的热密封材料层。
12、一种使用密封膜盖住食品容器开口端的方法,该方法包括:
将密封膜设置在盖子和围绕食品容器开口端的边沿之间;
将该密封膜感应密封到食品容器边沿上,并将一个或多个密封缝隙设置在食品容器边沿和密封膜之间,以允许在边沿和密封膜之间的通风;和
将一个或多个形成在盖子裙部和/或容器主体边沿部的凹口与一个或多个位于食品容器边沿和密封膜之间的密封缝隙对齐,并在盖子、边沿和密封膜之间在感应密封过程中通过密封缝隙减轻压力
13、根据权利要求12所述的方法,其中对齐一个或多个通风口的步骤包括施加压力,促使密封膜抵接到食品容器边沿,并且在一个或多个密封缝隙处施加至少较小的压力于密封膜上。
14、根据权利要求13所述的方法,其中促使密封膜抵接到食品容器边沿的步骤包括将密封膜与盖子面对边沿的突出部分相邻接,并且在一个或多个密封缝隙处施加至少较小的压力于密封膜上的步骤包括在盖子对着密封缝隙的突出部分设置间隔。
15、根据权利要求12所述的方法,其中将密封膜设置在盖子和边沿之间的步骤包括,在感应密封步骤之前,将密封膜保持在盖子的下侧上。
16、根据权利要求12所述的方法,还包括在将密封膜感应密封到食品容器边沿上的步骤之前,将盖子环绕开口螺纹连接到食品容器的颈部上。
17、根据权利要求12所述的方法,其中通道形成在盖子上。
18、根据权利要求12所述的方法,其中通道形成在边沿上。
19、一种食品产品容器,包括:
容器主体,具有内部和带有边沿的开放端部;
容器盖子,具有闭合壁和悬垂裙部,该悬垂裙部的大小适合于围绕容器的颈部;
密封膜,该密封膜被感应密封于容器主体颈部的边沿,以将开放端部覆盖住,密封膜的悬垂部分延伸超过该边沿,和
通风路径,该通风路径形成在边沿和密封膜的悬垂部分之间,临近盖子和边沿的一个凹口。
20、根据权利要求19所述的食品产品容器,其中凹口沿着径向方向和通常垂直的方向延伸。
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EP (1) | EP2011741A1 (zh) |
JP (1) | JP2009012862A (zh) |
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CN (1) | CN101362537A (zh) |
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2007
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- 2008-06-30 IL IL192536A patent/IL192536A0/en unknown
- 2008-07-02 CA CA002636650A patent/CA2636650A1/en not_active Abandoned
- 2008-07-02 EP EP08159565A patent/EP2011741A1/en not_active Withdrawn
- 2008-07-04 JP JP2008175879A patent/JP2009012862A/ja active Pending
- 2008-07-04 RU RU2008127429/12A patent/RU2008127429A/ru not_active Application Discontinuation
- 2008-07-04 CN CNA2008101446866A patent/CN101362537A/zh active Pending
- 2008-07-04 ZA ZA200805875A patent/ZA200805875B/en unknown
- 2008-07-04 KR KR1020080064733A patent/KR20090004736A/ko not_active Application Discontinuation
-
2013
- 2013-10-11 US US14/052,512 patent/US9533799B2/en active Active
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112340213A (zh) * | 2015-01-23 | 2021-02-09 | 利乐拉瓦尔集团及财务有限公司 | 螺旋盖和食品用包装容器 |
CN112340213B (zh) * | 2015-01-23 | 2022-08-02 | 利乐拉瓦尔集团及财务有限公司 | 螺旋盖和食品用包装容器 |
CN106395157A (zh) * | 2015-07-27 | 2017-02-15 | 康葵 | 一种食品包装容器、包装方法及其用途 |
Also Published As
Publication number | Publication date |
---|---|
IL192536A0 (en) | 2009-02-11 |
RU2008127429A (ru) | 2010-01-10 |
EP2011741A1 (en) | 2009-01-07 |
US20090008392A1 (en) | 2009-01-08 |
CA2636650A1 (en) | 2009-01-05 |
US8584876B2 (en) | 2013-11-19 |
JP2009012862A (ja) | 2009-01-22 |
ZA200805875B (en) | 2009-04-29 |
US20140053513A1 (en) | 2014-02-27 |
US9533799B2 (en) | 2017-01-03 |
KR20090004736A (ko) | 2009-01-12 |
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