CN114514096A - 具有非对称齿的热密封夹爪 - Google Patents

具有非对称齿的热密封夹爪 Download PDF

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CN114514096A
CN114514096A CN202080069798.9A CN202080069798A CN114514096A CN 114514096 A CN114514096 A CN 114514096A CN 202080069798 A CN202080069798 A CN 202080069798A CN 114514096 A CN114514096 A CN 114514096A
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jaw
angle
face
pair
valley
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史帝文·图克
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Frito Lay North America Inc
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Frito Lay North America Inc
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
    • B25J15/00—Gripping heads and other end effectors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/431—Joining the articles to themselves
    • B29C66/4312—Joining the articles to themselves for making flat seams in tubular or hollow articles, e.g. transversal seams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
    • B25J19/00—Accessories fitted to manipulators, e.g. for monitoring, for viewing; Safety devices combined with or specially adapted for use in connection with manipulators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/74—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
    • B29C66/7232—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer
    • B29C66/72321—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer consisting of metals or their alloys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81433—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined being toothed, i.e. comprising several teeth or pins, or being patterned
    • B29C66/81435—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined being toothed, i.e. comprising several teeth or pins, or being patterned comprising several parallel ridges, e.g. for crimping
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/10—Applying or generating heat or pressure or combinations thereof
    • B65B51/26—Devices specially adapted for producing transverse or longitudinal seams in webs or tubes
    • B65B51/30—Devices, e.g. jaws, for applying pressure and heat, e.g. for subdividing filled tubes
    • B65B51/303—Devices, e.g. jaws, for applying pressure and heat, e.g. for subdividing filled tubes reciprocating along only one axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/74—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area
    • B29C65/745—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using a single unit having both a severing tool and a welding tool
    • B29C65/7451—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using a single unit having both a severing tool and a welding tool the severing tool and the welding tool being movable with respect to one-another
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • B29C66/83221—Joining or pressing tools reciprocating along one axis cooperating reciprocating tools, each tool reciprocating along one axis

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Abstract

用于在相对的可热密封表面之间形成密封的一对配合的密封夹爪，包括第一夹爪和互补的第二夹爪。每个夹爪具有密封表面，该密封表面包括由谷(26、126)分开的至少两个峰。每个峰包括第一面(30、130)和第二面(34、134)。平分谷的假想线(40、140)限定假想线与第一面之间的第一角度(A)，并且限定假想线与第二面之间的第二角度(B)，使得第一角度不同于第二角度。

Description

具有非对称齿的热密封夹爪
技术领域
本公开涉及食品包装和成形设备，特别是用于形成这种包装的配合的密封夹爪。
背景技术
许多商品在成形、填充和密封包装机上被包装。包装袋在这些机器上由诸如聚合物和金属箔膜或其组合的材料卷形成。袋被成形、填充、密封，然后与正在包装机上成形的前进的袋流断开。
通常，将形成袋的内侧的膜的一层或更多层由膜制造商设计成使得其在经受热和压力时将软化并流动。成形、填充和密封袋包装机的侧密封部和横向密封部将前膜和后膜一起加热并加压，以将对应的膜彼此粘附。通常在通过密封部加热和加压期间，包装膜的内层软化并流动，使得它们彼此粘附以将前膜和后膜密封在一起以形成袋。
为了增强前膜和后膜之间的密封，通常密封条部的密封表面(无论密封表面是侧密封部还是横向密封部)以“锯齿”或“方波”图案滚花。这使膜关于它们被密封在一起的区域拉伸。这种拉伸增加了膜之间的密封的表面积，并且在一定程度上使前膜和后膜彼此机械互锁。
包装膜最常见的是可热密封的聚合物组合物。在热密封过程中，存在几个变量，但其中重要的是夹爪施加的压力、停留时间(即施加压力的时间)和密封温度。密封温度通常由包装材料决定。但是，施加的压力和停留时间是操作者可以操控的参数。应当理解，在施加的压力和停留时间之间存在关系，从而通常期望操控这两者使得可以生产更多数量的包装。
发明内容
根据本公开的一个方面，用于在相对的可热密封的表面之间形成密封的一对配合的密封夹爪包括第一夹爪和第二夹爪，第二夹爪具有与第一夹爪的密封表面互补的密封表面。当相对的可热密封材料横穿一对配合的密封夹爪时，夹爪间歇地闭合以形成密封。
第一夹爪具有密封表面，该密封表面包括由谷(凹槽)分开的至少两个峰(脊)。每个峰包括第一面和第二面。平分谷的假想线在该假想线与第一面之间限定第一角度，并在该假想线与第二面之间限定第二角度。第一角度不同于第二角度。在一些情况下，第一角度和第二角度之间的差值在约10°至约30°的范围内。
在一个实施例中，所述一对夹爪包括互补的刀槽。在存在刀槽的一些实施例中，第一夹爪在刀槽的第一侧上的密封表面具有轮廓，该轮廓是刀槽的第二侧上的密封表面的镜像。
在一些情况下，每个峰的第一面限定前导面，而每个峰的第二面限定跟随面。在设置刀槽的情况下，在刀槽的第一侧上，第一角度将大于第二角度，而在刀槽的第二侧上，第一角度将小于第二角度。因为第二夹爪具有与第一夹爪的密封表面互补的密封表面，所以在刀槽的第一侧上，第一角度将小于第二角度，而在刀槽的第二侧上，第一角度将大于第二角度。
当结合附图考虑时，通过本发明的以下详细描述，本发明的其他方面、实施例和特征将变得明显。附图不旨在按比例绘制。在附图中，在各个附图中示出的每个相同或基本相似的部件通常由一个数字或符号表示。为了清楚起见，并非每个部件都在每个图中被标记。在说明对于使本领域普通技术人员理解本发明不是必需的情况下，不示出本发明的每个实施例的每个部件。
本发明扩展到基本上如本文所述和/或如参考附图所示的方法、系统、部件的套件和装置。
本发明扩展到本文描述和/或示出的任何新颖方面或特征。另外，装置方面可以应用于方法方面，反之亦然。此外，一个方面中的任何、一些和/或所有特征可以以任何适当的组合应用于任何其他方面中的任何、一些和/或所有特征。
还应当理解，在本发明的任何方面中描述和限定的各种特征的特定组合可以独立地被实现和/或提供和/或使用。
附图说明
以下描述结合附图，所有附图都通过非限制性示例的方式给出，这些非限制性示例可用于理解所描述的方法和系统可如何体现。
图1是现有技术的填充设备的透视图。
图2是一对配合的密封夹爪的实施例的等轴视图。
图3是图2中所示的一对配合的密封夹爪的侧视图，其中两个夹爪以相对、平行对准的方式放在一起，并且描绘了峰和谷的一个实施例。
图4是一对配合的密封夹爪的另一实施例的侧视图，其中两个夹爪以相对、平行对准的方式放在一起，并且描绘了峰和谷的另一实施例。
图5示出了图3的配合的密封夹爪的放大部分。
图6示出了图4的配合的密封夹爪的放大部分。
具体实施方式
图1示出了典型的竖直的成形、填充和密封包装机。这种类型的机器由储存在辊(未示出)上并沿着延伸穿过一组张紧器的膜路径并经过成形套环被拉拽的膜形成袋子，该成形套环允许膜围绕成形器的外表面包裹。膜路径是膜沿其行进的一组预定位置，例如，当操控膜从大致平面的形状因子到填充的袋子时，膜通过机器所采取的路径。通过一组拉带沿着成型器的长度拉拽膜，同时竖直的密封器将膜的纵向边缘密封在一起以形成膜管。横向密封通过下面描述的配合的密封夹爪在膜管中形成，该密封夹爪位于拉带的下游并且位于膜路径的相对侧上。
在操作中，部分成形的袋子填充有产品，该产品首先被称重，然后通过漏斗，然后通过成形器，然后被沉积在部分成形的袋子中。现在填充有产品的部分成形的袋子在上游端通过配合的密封夹爪密封，并从膜管上拆下，以形成填充有食品的袋子。在一个实施例中，配合的密封夹爪被配置为接纳切割器或刀，当形成横向密封时，或在形成横向密封之后不久，该切割器或刀将下游袋子与上游膜管分离。
现在转到图2，示出了用于在相对的可热密封表面之间形成密封的一对配合的热密封夹爪。更具体地，第一密封夹爪10设置在膜路径F的第一侧上，并且第二密封夹爪12设置在膜路径的第二(相对)侧上并且定位成与第一密封夹爪10相对。第一夹爪10具有第一密封表面14，而第二夹爪12具有第二密封表面16，第一密封表面和第二密封表面彼此互补。每个夹爪具有相应且互补的狭槽50、52，所述狭槽50、52被构造成接纳刀(未示出)以将形成的包装从随后的待形成的包装分离。
现在参考图3，示出了一对配合的热密封夹爪的一个实施例。每个夹爪的结构将总体上参考第一夹爪10进行描述，因为应当理解，第二夹爪12具有互补结构。如上所述，第一夹爪10具有第一密封表面14，第一密封表面14设置有由谷26(也可以称为凹槽)分开的至少两个峰20(也可以称为脊部或凸台(land))。虽然图3示出了第一夹爪10具有两个峰20(并且第二夹爪12具有三个峰120)，但是应当理解，密封表面可以设置有更多数量的峰。例如，图4示出了配合的密封夹爪的另一实施例，其中第一夹爪10具有四个峰20(并且第二夹爪12具有五个峰120)。应当理解，与具有较少数量的峰和谷的夹爪相比，通过提供更多数量的峰和谷，包装被密封的面积将更大，因此用于形成包装的膜的量将更大。
回到图3，第一夹爪10的每个峰20具有第一面30和第二面34。在这方面，应当理解，当相对的可热密封表面在膜方向F上接近并横穿一对配合的热密封夹爪时，第一面30可以被认为是前导面32，而第二面可以被认为是跟随面34。
类似地，第二夹爪12的每个峰120具有第一面130和第二面134。在这方面，应当理解，当相对的可热密封表面接近并横穿一对配合的热密封夹爪时，第一面130可以被认为是前导面132，而第二面可以被认为是跟随面134。
第一夹爪10设置有第一刀槽50，并且第二夹爪12设置有相对的第二刀槽52，第一刀槽50和第二刀槽52两者被构造成接纳将完成的包装从待完成的包装分离的刀(未示出)。通常并且如图3所示，第一刀槽50和第二刀槽52分别设置在第一夹爪和第二夹爪的大约中间处。因此，参照第一夹爪10，在第一刀槽50的第一侧54(第一夹爪10的前导部(在膜行进方向F上))上设置有两个峰20，并且在第一刀槽50的第二侧56(第一夹爪10的跟随部(在膜行进方向上))上设置有两个峰20。
以类似的方式，参照第二夹爪12，在第二刀槽52的第一侧154(第二夹爪12的前导部(在膜行进方向F上))上设置有三个峰120，并且在第二刀槽52的第二侧156(第二夹爪12的跟随部(在膜行进方向F上))上设置有三个峰120。因为第一夹爪10和第二夹爪12是互补的，所以应当理解，当第一夹爪和第二夹爪朝向彼此前进或移动时，第一密封表面14上的峰20接近第二密封表面16上的谷126，反之亦然。
现在转到图5，示出了图3中所示的第一密封夹爪和第二密封夹爪的放大部分。应当理解，每个峰20、120的顶部是平坦的(22、122)，以为每个峰20提供梯形形状。类似地，每个谷26、126是平坦的(27、127)。可替代地并且在图5中最佳地示出，图5是图4中所示的第一密封夹爪和第二密封夹爪的放大部分，每个峰20、120的顶部是弯曲的(24、124)。类似地，每个谷26、126是弯曲的(29、129)。
如前所述，每个峰20、120具有第一面30、130(前导面32、132)和第二面34、134(跟随面36、136)。将谷26、126平分(即，将谷26分成两个相等的部分)的假想线40、140限定第一角度A和第二角度B，第一角度A是由假想线40、140和第一面30、130产生的角度，第二角度B是由假想线40、140和第二面34、134产生的角度。
第一面30、130和第二面34、134形成为使得第一角度A不同于第二角度B。在一些情况下，第一角度A和第二角度B之间的差在约10°至约30°的范围内，并且在一些情况下相差约20°。
应当理解，刀槽50、52的第一侧54、154上的峰和谷形成包装的底部，而刀槽50、52的第二侧56、156上的峰和谷形成前一包装的顶部。因此，如果刀槽50、52的第一侧54、154上的峰20、120和谷26、126的形状轮廓是刀槽50、52的第二侧56、156上的峰20、120和谷26、126的镜像，则是有利的。
就这一点而言，在一个实施例中并且参考第一夹爪10，在刀槽50的第一侧54上，角度A大于角度B。在这种情况下，角度A在约25°至约60°、或约35°至约55°、或约40°至约50°的范围内，并且在一些情况下为约45°。角度B在约15°至约35°、或约20°至约30°的范围内或为约25°。
当第一刀槽50的第二侧56上的峰和谷的形状轮廓是第一刀槽50的第一侧54上的峰和谷的形状轮廓的镜像时，角度A小于角度B。在这种情况下，角度A的范围为约15°至约35°，或约20°至约30°，或约25°。角度B在约25°至约60°、或约35°至约55°、或约40°至约50°的范围内，并且在一些情况下为约45°。
如前所述，第二夹爪12与第一夹爪互补。因此，在第二刀槽52的第一侧154上，角度A小于角度B。在这种情况下，角度A的范围为约15°至约35°，或约20°至约30°，或约25°。角度B在约25°至约60°、或约35°至约55°、或约40°至约50°的范围内，并且在一些情况下为约45°。
当第二刀槽52的第二侧156上的峰和谷的形状轮廓是第二刀槽52的第一侧154上的峰和谷的形状轮廓的镜像时，角度A大于角度B。在这种情况下，角度A在约25°至约60°、或约35°至约55°、或约40°至约50°的范围内，并且在一些情况下为约45°。角度B在约15°至约35°、或约20°至约30°的范围内或为约25°。
在峰和谷的上述构造的情况下，特别是在限定的角度A和B不对称的情况下，应当理解，每个峰20、120(凸台或脊)将“偏心”地进入相对且互补的谷26、126。相信这种布置将在角度A或角度B较小的那些区域中产生较高的张力，并且进而将产生更强的密封。本领域技术人员将理解，在这种情况下，密封的较强部分将是来自包装内部的前缘。
虽然本公开的概念能够进行各种修改和替代形式，但是已经在附图中通过示例的方式示出了本公开的具体示例性实施例。然而，应当理解，并不意图将本公开的概念限制于具体公开的形式；本发明旨在涵盖落入由权利要求限定的本发明的精神和范围内的所有修改、等同物和替代物。
总的来说，描述了用于在相对的可热密封表面之间形成密封的一对配合的密封夹爪。该对配合的密封夹爪包括具有密封表面的第一夹爪，该密封表面包括由谷分开的至少两个峰。每个峰包括第一面和第二面，使得平分谷的假想线限定假想线与第一面之间的第一角度并且限定假想线与第二面之间的第二角度，使得第一角度不同于第二角度。提供具有与第一夹爪密封表面互补的密封表面的第二夹爪。
本发明的各方面也在以下编号的条款中阐述，其中描述了：
1、一对配合的密封夹爪，所述一对配合的密封夹爪用于在相对的可热密封表面之间形成密封，所述一对配合的密封夹爪包括：
第一夹爪，所述第一夹爪具有密封表面，所述密封表面包括由谷分开的至少两个峰，其中每个峰包括第一面和第二面，并且其中平分所述谷的假想线限定所述假想线与所述第一面之间的第一角度，并且限定所述假想线与所述第二面之间的第二角度，使得所述第一角度不同于所述第二角度；以及，
第二夹爪，所述第二夹爪具有与所述第一夹爪的密封表面互补的密封表面。
2、根据条款1所述的密封夹爪，其中所述第一角度和所述第二角度之间的尺寸差在约10°至约30°的范围内。
3、根据条款1或条款2所述的密封夹爪，其中，所述第一夹爪包括刀槽，并且所述第二夹爪包括与所述第一夹爪的所述刀槽相对的刀槽。
4、根据前述条款中任一项所述的密封夹爪，其中，所述第一夹爪在所述第一夹爪的所述刀槽的第一侧上的所述密封表面具有轮廓，所述轮廓是所述第一夹爪的所述刀槽的第二侧上的所述密封表面的镜像。
5、根据前述条款中任一项所述的密封夹爪，在所述第一夹爪的密封表面上包括在所述第一夹爪的所述刀槽的所述第一侧上的由谷分开的至少两个峰和在所述第一夹爪的所述刀槽的所述第二侧上的由谷分开的至少两个峰。
6、根据前述条款中任一项所述的密封夹爪，其中，当所述相对的可热密封表面横穿所述一对配合的密封夹爪时，所述第一夹爪上的每个峰的所述第一面限定前导面，并且所述第一夹爪上的每个峰的所述第二面限定跟随面。
7、根据前述条款中任一项所述的密封夹爪，其中在所述刀槽的所述第一侧上，所述第一角度大于所述第二角度，并且在所述刀槽的所述第二侧上，所述第一角度小于所述第二角度。
8、在用于在相对的可热密封表面之间形成密封的一对配合的密封夹爪中，其中每个夹爪具有由谷分开的至少两个峰，改进之处在于包括将谷平分的假想线在假想线和峰的第一面之间限定第一角度，并且在假想线和相邻峰的第二面之间限定第二角度，使得所述第一角度不同于所述第二角度。

Claims (8)

1.一对配合的密封夹爪，所述一对配合的密封夹爪用于在相对的可热密封表面之间形成密封，所述一对配合的密封夹爪包括：
第一夹爪，所述第一夹爪具有密封表面，所述密封表面包括由谷分开的至少两个峰，其中，每个峰包括第一面和第二面，并且其中平分所述谷的假想线限定所述假想线与所述第一面之间的第一角度，并且限定所述假想线与所述第二面之间的第二角度，使得所述第一角度不同于所述第二角度；以及
第二夹爪，所述第二夹爪具有与所述第一夹爪的密封表面互补的密封表面。
2.根据权利要求1所述的一对配合的密封夹爪，其中，所述第一角度和所述第二角度之间的尺寸差在约10°至约30°的范围内。
3.根据权利要求1所述的一对配合的密封夹爪，其中，所述第一夹爪包括刀槽，并且所述第二夹爪包括与所述第一夹爪的所述刀槽相对的刀槽。
4.根据权利要求3所述的一对配合的密封夹爪，其中，所述第一夹爪在所述第一夹爪的所述刀槽的第一侧上的所述密封表面具有轮廓，所述轮廓是所述第一夹爪的所述刀槽的第二侧上的所述密封表面的镜像。
5.根据权利要求4所述的一对配合的密封夹爪，在所述第一夹爪的所述密封表面上包括在所述第一夹爪的所述刀槽的所述第一侧上的由谷分开的至少两个峰和在所述第一夹爪的所述刀槽的所述第二侧上的由谷分开的至少两个峰。
6.根据权利要求5所述的一对配合的密封夹爪，其中，当所述相对的可热密封表面横穿所述一对配合的密封夹爪时，所述第一夹爪上的每个峰的所述第一面限定前导面，并且所述第一夹爪上的每个峰的所述第二面限定跟随面。
7.根据权利要求6所述的一对配合的密封夹爪，其中，在所述刀槽的所述第一侧上，所述第一角度大于所述第二角度，并且在所述刀槽的所述第二侧上，所述第一角度小于所述第二角度。
8.在用于在相对的可热密封表面之间形成密封的一对配合的密封夹爪中，其中，每个夹爪具有由谷分开的至少两个峰，其改进在于，其中，平分谷的假想线限定所述假想线与峰的第一面之间的第一角度，并且限定所述假想线与相邻峰的第二面之间的第二角度，使得所述第一角度不同于所述第二角度。
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US11260603B2 (en) 2022-03-01
US20210101348A1 (en) 2021-04-08
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AU2020360299A1 (en) 2022-03-31
MX2022003875A (es) 2022-04-29
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