CN103153804A - 改进的显示开封的封闭件和包装 - Google Patents

改进的显示开封的封闭件和包装 Download PDF

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CN103153804A
CN103153804A CN2011800493535A CN201180049353A CN103153804A CN 103153804 A CN103153804 A CN 103153804A CN 2011800493535 A CN2011800493535 A CN 2011800493535A CN 201180049353 A CN201180049353 A CN 201180049353A CN 103153804 A CN103153804 A CN 103153804A
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kaifeng
ring
container
protrusion
skirt portion
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CN103153804B (zh
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S·萨第齐
J·伊迪
D·E·热韦尔
W·默尔
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Closure Systems International Inc
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D41/00Caps, e.g. crown caps or crown seals, i.e. members having parts arranged for engagement with the external periphery of a neck or wall defining a pouring opening or discharge aperture; Protective cap-like covers for closure members, e.g. decorative covers of metal foil or paper
    • B65D41/32Caps or cap-like covers with lines of weakness, tearing-strips, tags, or like opening or removal devices, e.g. to facilitate formation of pouring openings
    • B65D41/325Caps or cap-like covers with lines of weakness, tearing-strips, tags, or like opening or removal devices, e.g. to facilitate formation of pouring openings with integral internal sealing means
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D41/00Caps, e.g. crown caps or crown seals, i.e. members having parts arranged for engagement with the external periphery of a neck or wall defining a pouring opening or discharge aperture; Protective cap-like covers for closure members, e.g. decorative covers of metal foil or paper
    • B65D41/02Caps or cap-like covers without lines of weakness, tearing strips, tags, or like opening or removal devices
    • B65D41/04Threaded or like caps or cap-like covers secured by rotation
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D41/00Caps, e.g. crown caps or crown seals, i.e. members having parts arranged for engagement with the external periphery of a neck or wall defining a pouring opening or discharge aperture; Protective cap-like covers for closure members, e.g. decorative covers of metal foil or paper
    • B65D41/32Caps or cap-like covers with lines of weakness, tearing-strips, tags, or like opening or removal devices, e.g. to facilitate formation of pouring openings
    • B65D41/34Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt
    • B65D41/3423Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt with flexible tabs, or elements rotated from a non-engaging to an engaging position, formed on the tamper element or in the closure skirt
    • B65D41/3428Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt with flexible tabs, or elements rotated from a non-engaging to an engaging position, formed on the tamper element or in the closure skirt the tamper element being integrally connected to the closure by means of bridges
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D51/00Closures not otherwise provided for
    • B65D51/16Closures not otherwise provided for with means for venting air or gas
    • B65D51/1633Closures not otherwise provided for with means for venting air or gas whereby venting occurs by automatic opening of the closure, container or other element
    • B65D51/1661Closures not otherwise provided for with means for venting air or gas whereby venting occurs by automatic opening of the closure, container or other element by means of a passage for the escape of gas between the closure and the lip of the container mouth
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D2401/00Tamper-indicating means
    • B65D2401/15Tearable part of the closure
    • B65D2401/20Frangible elements completely enclosed in closure skirt

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  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)

Abstract

本发明公开了一种开封指示的塑料封闭件和显示开封的包装,其中,封闭件包括具有基本上连续的防开封环的防盗带。在防开封环的防开封指示方向上,防开封环一般有角度地从封闭件向上且向内地延伸,以与相关联容器的相对扩大的环形锁环相接合。值得注意地,防开封环包括多个沿圆周间隔开的突出部,其优选包括相对厚的区域或肩部,通过一般在容器锁环下方至少一个肩部与相关联容器的接合,所述相对厚的区域或肩部理想地承担限制防盗带相对于容器的横向运动。

Description

改进的显示开封的封闭件和包装
相关联申请的交叉引用
本申请要求在2010年10月15日提出的美国临时申请序号No.61/393,438的优先权,该美国临时申请的公开内容以参引的方式合并于本申请。
技术领域
本发明一般地涉及一种用聚合材料模制的塑料封闭件,更具体地,本发明涉及一种显示开封的塑料封闭件,其中,所述封闭件被构造成提高其与相关联容器的协作以提供具有改进的性能特性的显示开封的包装,同时理想地实现材料重量节约。
背景技术
用聚合材料形成的塑料封闭件在市场上满足广泛的可接受性。已经发现尤其适用于碳酸饮料和非碳酸饮料以及也适用于其它应用的这种类型的封闭件可被构造成提供理想的密封性能以及理想的开封指示性能。这种性质的封闭件能够利用注射模制或者挤压模制成型技术有效地形成。
通过降低形成每个封闭件所需要的聚合材料(即,使每个封闭件重量更轻)已经促进了这些类型的封闭件的经济使用。然而,就此而言,特定的尺寸和性能特性变得重要。特别地,通过高速、自动封盖设备,这种性质的封闭件被典型地施加到相关联的容器,高速、自动封盖设备包括将每个内部带有螺纹的封闭件可旋转地适配到相关联的外部带有的容器的封盖头或夹盘。被构造成开封指示的封闭件典型地包括从封闭件的裙部部分垂下的开封指示防盗带,防盗带被构造成与相关联容器协作地接合以使得在从容器开始移除封闭件过程中,防盗带部分地或全部地与裙部部分的其余部分分开。
如将理解的,纵使伴随开始封闭件的施加,封闭件防盗带与容器的部分不可避免地干涉接合,例如它的外螺纹成型,伴随封闭件高速施加到相关联容器上,防盗带保持完整无缺,这是很重要的。在典型的封闭件施加过程中,封闭件通过旋转而施加于瓶子或者其他容器,直到封闭件/容器螺纹相互作用克服封闭件密封结构,取下封闭件,封闭件密封结构接触容器口部的上部末端边缘。
一种类型的封闭件开封指示防盗带包括基本上连续的环,该环一般向上和向内地延伸到封闭件的内部。这种性质的封闭件可能展示出一些伴随高速施加的问题。特别地,如果在相对扩大的环形容器锁环处,整个环周围与所谓容器的“A直径”有太多干涉,在不将防盗带环折起到封闭件中的条件下,封闭件将难以被施加。总之,如果存在不充分的干涉,存在如下可能性,即防盗带的开封指示功能可能在移除封闭件过程中因所述环在防盗带的带部分和容器的A直径之间变成楔形的而被削弱。
本发明考虑了用于开封指示封闭件的防盗带的改进的结构,它提高了与相关联容器的接合,但理想地避免了对封闭件增加过多的重量,还理想地避免了在封闭或施加期间防盗带移动越过容器口部时产生过多的阻力和圆周应力。
发明内容
一种开封指示的塑料封闭件和显示开封的包装,根据本发明包括封闭盖,所述封闭盖具有从封闭盖的裙部部分垂下的开封指示防盗带。防盗带包括从封闭盖的裙部部分垂下且至少部分可拆卸地连接到封闭盖的裙部部分的环形带部分。在防开封环的防开封指示方向上,基本上连续的防开封环从防盗带的环形带部分的下边缘向内且向上地延伸。在这个方向上,防开封环被构造成与相关联容器的环形锁环的一般面向下的表面相接合。
根据本发明,防开封环包括多个沿圆周间隔开的、径向延伸的突出部,当防开封带处于它的防开封指示方向上时,所述突出部一般径向向内地延伸。值得注意的是,通过一般在容器锁环下方所述突出部中的至少一个突出部与容器的接合,所述突出部承担限制所述防盗带相对于所述容器的横向运动以理想地提高所述防盗带与容器的接合。
根据所示的实施方式,所述塑料封闭件包括封闭盖,所述封闭盖具有顶壁部分和从所述顶壁部分垂下的环形带部分。所述裙部部分包括内螺纹造型,其构造成与相关联容器的外螺纹造型螺纹啮合。
如所指出的,所述封闭盖包括从所述封闭盖的裙部部分垂下的开封指示防盗带。易折断连接件,例如形式为多个易折断肋或桥接件,至少部分将防盗带可拆卸地连接到封闭盖的裙部部分。封闭件防盗带包括基本上连续的防开封环,具有一般截头圆锥形的构造,从所述防盗带的环形带部分的下边缘向内且向上地延伸。在这个防开封指示方向上,防开封环被定位成与相关联容器的锁环的一般面向下的表面相接合。
如所指出的,通过防开封环设有多个沿圆周间隔开的、径向延伸的突出部而提高了开封指示,当防开封环处于它的防开封指示方向上,所述突出部一般径向向外地突出。值得注意的是,一般在所述容器锁环下方,所述防开封环的突出部中的至少一个突出部可与所述容器相接合,以便限制所述防盗带相对于所述容器的横向运动。通过所述突出部与容器口部的这种协作,以及对所述防盗带相对于容器口部的横向运动的伴随限制,在锁环下方接合容器的、防开封环的与一个或多个突出部相对的部分维持与所述锁环的一般面向下的表面理想地协作接合,因而承担确保理想的开封指示功能。
根据所示的实施方式,所述防盗带的防开封环包括从防开封环的自由边延伸的多个圆周间隔开的调整片以提高在移除封闭件的过程中所述防开封环与容器的接合。根据一个所示实施方式,所述防开封环上的突出部设置为在防开封环上的相对厚的斜坡式肩部的形式。在这个所示的实施方式中,多个间隔开的调整片分别与多个沿圆周间隔开的肩部对齐。当所述封闭件被完全施加到容器上时,所述调整片一般可定位在所述容器锁环和封闭件防盗带的带部分之间,因而进一步理想地提高在移除封闭件时所述封闭件防盗带和容器之间的开封指示协作。在替代实施方式中,所述防开封环突出部设置为径向指向的直立肋的形式。在这个实施方式中,所述多个防开封环的间隔开的调整片分别邻接多个径向指向的肋进行定位。
在本发明的优选形式中,多个间隔开的易折断桥接件将所述封闭件防盗带可拆卸地连接到所述封闭盖的裙部部分。值得注意的是,优选易折断桥接件的数量不同于防开封环突出部的数量,典型地大于防开封环突出部的数量,每个桥接件不与突出部对齐并且与所述突出部间隔开。这理想地承担避免在施加封闭件过程中向任意易折断桥接件施加过大的应力,因为所述防开封环突出部超过容器在容器锁环处的A直径。
本发明的其它特征和优点将从下面的详细描述、附图和所附权利要求书变得容易明了。
附图说明
图1是体现本发明原理的显示开封的封闭件的立体图,显示通常处于封闭件防盗带的“造型”方向上,在防盗带的防开封环倒置到它的防开封指示方向前的封闭件防盗带;
图2是图1所示的封闭件防盗带的相对放大的片段立体图,示出当防盗带处于它的“造型”方向上时防盗带的外表面;
图3是图1的防盗带的放大的片段立体图,示出在它的图1的“造型”方向上防盗带的内表面;
图4是显示体现本发明的原理的显示开封的包装的简图,示出目前的显示开封的封闭件与相关联容器的协作,用于提高封闭件的开封指示性能;以及
图5是类似于图2的视图,显示本发明的替代实施例。
具体实施方式
尽管本发明容许各种形式的实施方式,在附图中示出和在下面将描述其优选实施方式,应理解本公开应认为是本发明的示例,并不试图限制本发明于这里所公开的具体实施方式。
现在参照附图,附图显示了体现本发明原理的开封指示的塑料封闭件10。如现有技术已知的,封闭件10可用适当的聚合材料,例如polyperperlene、聚乙烯和类似物由注射或挤压模制技术有效地形成。
封闭件10包括整体的封闭盖12,封闭盖12具有顶壁部分14和环形垂下的裙部部分16,环形垂下的裙部部分16具有内螺纹造型18。螺纹造型18构造成与相关联容器C的颈部部分上设置的外螺纹造型20螺纹啮合。图4中概略地示出的所说明的容器C包括与开封指示封闭件10协作的相对扩大的环形锁环22以提供体现本发明原理的显示开封的包装。
在所说明的实施方式中,封闭件10示出为所谓无衬里封闭件,其中,封闭件不包括设置在封闭盖12的顶壁部分14的内表面处的单独密封衬里。更确切地说,在所说明的实施方式中,封闭盖12包括环形插塞式封闭元件24,一般可定位在相关联容器C的口部内,和环形外部密封部26,可与容器颈部部分的一般面向外的表面相接合。应理解的是,封闭件10的密封结构的具体构造可以改变,但遵守这里所公开的关于提高封闭件和容器包装的开封指示性能的原理。
用于封闭件/容器包装的开封指示由环形防盗带30提供,环形防盗带30至少部分可拆卸地连接到封闭盖12的裙部部分16。防盗带30可拆卸地连接到裙部部分16的可拆卸连接可通过提供在防盗带和裙部部分之间延伸的多个沿圆周间隔开的易折断的桥接件或肋31实现。易折断的连接件可通过将封闭盖12与防盗带30一体地模制来有效地形成,然后切断或压折封闭件,以使得易折断的桥接件31保持在防盗带和裙部部分之间提供理想的易折断的连接件。封闭件10已经被沿圆周切断或压折,一般在32,由此使防盗带30与裙部部分16区别开来,其中,桥接件31提供在防盗带和裙部部分之间的理想的易折断的连接件。
根据本发明,封闭件10的防盗带30包括一般与封闭盖的裙部部分16对齐的环形部分34。防盗带30还包括基本上连续的、一般截头圆锥体的防开封环36,它从防盗带30的环形带部分34延伸并且与其一体地形成。在图1中,防开封环34一般显示在它的“造型”方向上,其中,防开封环34一般从防盗带30的环形带部分34向下有角度地延伸。在将封闭件10施加到相关联容器C之前,使用合适的工具将防开封环34倒置到防开封指示方向,其中,防开封环34一般从环形带部分34的下边缘向内向上地延伸,以与相关联容器C的锁环22协作地、开封指示地接合。在图4概略地显示防开封环34处于这个防开封指示方向上。
如应理解的,在通过折断其中一个或多个易折断的桥接件31而将封闭件10从相关联容器C开始移除期间,通过将防盗带30部分地或全部地从裙部部分16分开,防开封环34与容器锁环22的开封指示协作提供理想的显示开封功能。特别地,防开封环34的内部自由边被构造成伴随封闭件的移除,其与容器锁环22的一般面向下的表面协作地接合,藉着封闭件相对于容器的不插入运动致使通过折断和断裂在其间设置的易折断的连接件而从裙部部分至少部分拆卸地连接防盗带。
如本领域技术人员应理解的,希望将防开封环34构造成与容器锁环22的一般面向下的表面可预测地且可靠地接合。总之,应理解的是,在不提前折断防盗带和封闭盖裙部部分16之间的易折断连接件或者使其失效的条件下,在将封闭件高速施加到容器的过程中,定位在它的向上地、向内地延伸的防开封指示方向上的防开封环36,必须越过容器口部的结构(包括螺纹造型20和锁环22)。当考虑这些有点抵触的设计标准以及封闭件和容器的正常制造公差时,有时在封闭件防盗带30和容器颈部的口部之间存在足够的间隙,使得防盗带30能够被促使或强制提供相对于封闭件口部的有限的横向运动。这种横向运动可能不合意地导致防开封环36的一部分移动到一般远离该容器的位置,使得防开封环的自由边不适当地接合封闭件锁环22。
为了限制这种横向运动,尽管理想地避免使防开封环36基本上加厚或加长(这可能需要更多材料,并且妨碍封闭件的施加),防开封环36设有多个沿圆周隔开的、相对厚的肩状突出部38,如图4所示,当突出部38处于它的防开封指示方向上时,突出部38一般从防开封环36向内地延伸。值得注意的是,突出部38可具有斜坡式的结构以平滑地融合到防开封环36的表面中,当突出部38处于它的防开封指示方向上时,突出部38一般从防开封环径向向内地延伸。利用这个布置,至少其中一个突出部38定位成一般在锁环22下方接合容器C,藉此限制防盗带30相对于容器口部的横向运动。这个动作显示在图4中,其中,封闭件10的运动一般在右手方向上促使所示的突出部38一般在锁环22下方与容器C接合,藉此基本上阻止防开封环36在防盗带的与被促使在锁环22下方与该容器相接合的一个或多个突出部相对的部分处从锁环22脱离。
在具有28mm直径的封闭件的当前实施方式中,防开封环36已设有5个等间距地隔开的突出部38,其中,每个突出部38在0.022英寸的量级上,也就是说,防开封环36在每个突出部38处加厚的量。每个突出部38的优选斜切的平滑结构避免在封闭件施加过程中突出部与容器口部的结构的任意不合意的干涉。在本优选实施方式中,易折断桥接件31的数量不同于开封指示的突出部38的数量,典型地大于开封指示的突出部38的数量,每个桥接件不与突出部38对齐但与突出部38间隔开。这希望致使避免在封闭件施加过程中向易折断的桥接件施加过大的应力。上述实施方式具有5个突出部38,封闭件已经在32处被压折以与突出部38不对齐、间隔开的关系设置7个易折断桥接件31。
根据所示实施方式,防开封环36包括多个沿圆周间隔开的调整片40,当封闭件被完全施加到容器上时(见图4),调整片40一般可定位在环形带部分34和容器锁环32之间。调整片40理想地提高防开封环36与锁环22的协作接合。根据所示实施方式,沿圆周间隔开的调整片40从防开封环36的自由边延伸,并且优选分别与多个沿圆周间隔开的肩部38对齐。
在图5中示出了本发明的一个替代实施方式,其中,在防开封环36上径向延伸的突出部被设置成沿圆周间隔开的肋状突出部138的形式。突出部138被构造成其功能与前述突出部38的相同以限制防盗带30相对于容器锁环22的横向运动。如所显示的,突出部138可分别邻接调整片40进行定位。
从上所述,应注意到在不偏离本发明的新颖构思的精神和范围的前提下可作出许多修改和改型。应当理解不试图或不应推断为限制于这里所示的具体实施方式。本公开利用所附权利要求书试图覆盖落入权利要求保护范围的所有改型。

Claims (10)

1.一种塑料封闭件,包括:
封闭盖,所述封闭盖具有顶壁部分和从所述顶壁部分垂下的环形裙部部分,
所述封闭盖的所述裙部部分具有内螺纹造型,用于与相关联容器上的外螺纹造型螺纹啮合,
所述封闭盖还包括从所述裙部部分垂下的开封指示防盗带,所述防盗带包括从所述裙部部分垂下的、至少部分可拆卸地连接到所述裙部部分的环形带部分,和基本上连续的防开封环,在防开封指示方向上,所述防开封环从环形带部分的下边缘向内且向上地延伸以与相关联容器接合,
所述防开封环包括多个沿圆周间隔开的径向延伸的突出部,当所述防开封环处于所述防开封指示方向上时,所述防开封环一般径向向内突出,所述突出部承担限制所述防盗带相对于所述容器的横向运动以提高所述防盗带与所述容器的接合。
2.根据权利要求1所述的塑料封闭件,其特征在于,
所述相关联容器限定从容器的口部径向向外地延伸的一般连续的锁环,所述防开封环的所述突出部中的至少一个突出部一般在所述锁环下方可与所述容器接合以便限制所述防盗带相对于所述容器的横向运动。
3.根据权利要求1所述的塑料封闭件,其特征在于,
所述防开封环包括从所述防开封环的自由边延伸的多个沿圆周间隔开的调整片以便在移除封闭件过程中提高所述防开封环与所述容器的接合。
4.根据权利要求4所述的塑料封闭件,其特征在于,
每个所述突出部包括肩部,所述多个间隔开的调整片分别与所述多个沿圆周间隔开的肩部对齐。
5.根据权利要求3所述的塑料封闭件,其特征在于,
每个所述突出部包括肋,所述多个间隔开的调整片分别邻接所述多个肋进行定位。
6.根据权利要求1所述的塑料封闭件,其特征在于,
多个沿圆周间隔开的易折断桥接件将所述防盗带可拆卸地连接到所述裙部部分,每个所述桥接件与所述突出部间隔开。
7.一种显示开封的包装,包括:
容器,其具有带有外螺纹造型的颈部部分,和定位在所述外螺纹造型下方的环形锁;以及
塑料封闭件,其包括封闭盖,所述封闭盖具有顶壁部分和从所述顶壁部分垂下的环形裙部部分,所述封闭盖的所述裙部部分具有用于与所述容器的外螺纹造型螺纹啮合的内螺纹造型,
所述封闭盖还包括从所述裙部部分垂下的开封指示防盗带,所述防盗带包括从所述裙部部分垂下且至少部分可拆卸地连接到所述裙部部分的环形带部分,和基本上连续的防开封环,在防开封指示方向上,所述防开封环从环形带部分的下边缘向内且向上延伸以与所述容器的锁环的一般面向下的表面接合,
所述防开封环包括多个沿圆周间隔开的、径向延伸的肩部,当所述防开封环处于所述防开封指示方向上时,所述肩部一般径向向内突出,所述肩部承担通过一般在所述锁环下方所述肩部中的至少一个肩部与所述容器相接合,限制所述防盗带相对于所述容器的横向运动以提高所述防盗带与所述容器的接合。
8.根据权利要求7所述的显示开封的包装,其特征在于,
所述防开封环包括多个沿圆周间隔开的调整片,所述调整片从所述防开封环的自由边延伸以提高在移除所述封闭件过程中所述防开封环与所述容器的接合,所述调整片可与所述容器的所述锁环的一般面向外的表面接合。
9.根据权利要求8所述的显示开封的包装,其特征在于,
所述多个间隔开的调整片分别与所述多个沿圆周间隔开的肩部对齐。
10.根据权利要求7所述的显示开封的包装,其特征在于,
所述显示开封的包装包括多个沿圆周间隔开的易折断桥接件,其可将所述防盗带可拆卸地连接到所述裙部部分,所述桥接件的数量大于所述突出部的数量,每个所述桥接件与所述突出部间隔开。
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