Perforated Web Pouch Tearing Mechanism for Efficient Filling
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Solution Overview
Problem
Existing methods for producing pouches using continuous webs are cumbersome, require fusible film materials unsuitable for brewable substances, and have complex apparatus designs that are costly and inefficient for fast production.
Innovation Solution
The method involves perforating a continuous web to form leading and trailing length pieces, which are then torn apart to isolate pouches while still in a continuous format, allowing for filling and sealing without the need for cutting or complex gripping systems, using a rotatable filler wheel with piercing arms and a longitudinal opening guide to facilitate filling and sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a continuous web is used to form pouches, then production efficiency is improved, but the apparatus becomes complex and costly
Solution Approach 1:
The continuous web is perforated at intervals to create discrete pouch sections while maintaining continuous motion. The perforation means creates weak points in the web that allow easy separation into individual pouches without stopping the production line, thus maintaining high productivity while simplifying the apparatus by eliminating complex gripping and handling systems.
Solution Approach 2:
The perforated web automatically separates into individual pouches through its own structural weakness at the perforation points during the filling process. The pouches self-separate without requiring external gripping mechanisms, vacuum belts, or complex transfer systems, thereby reducing apparatus complexity while maintaining continuous production.
2Ease of manufacture
If fusible film material is used, then sealing is simplified, but the material is unsuitable for brewable substances like tea and coffee
Solution Approach 1:
The invention changes the material parameter from fusible film to perforated paper or fiber-based web material. This parameter change allows the material to be suitable for brewable substances while maintaining ease of manufacture through the perforation mechanism that enables simple separation and filling without requiring fusible properties.
3Ease of operation
If pockets are separated to form individual pouches, then individual filling is enabled, but handling becomes problematic
Solution Approach 1:
The web is perforated in advance to create pre-defined separation points before the filling process. This preliminary action allows individual pouches to be easily separated and filled without requiring complex handling mechanisms during operation, as the separation has already been prepared in the material structure itself.
Solution Approach 2:
The perforation acts as an intermediary element that facilitates both individual pouch formation and easy handling. The perforated sections serve as natural separation points that enable individual filling while simultaneously providing a simple mechanism for pouch separation without requiring additional handling equipment.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach simplifies the packaging process, reduces material waste, and allows for efficient production of pouches suitable for brewable substances like tea and coffee, while minimizing the complexity and bulkiness of the apparatus.
Implementation Method 1
The piercing arms are movable relative to one another to increase the distance between a trailing edge of the leading length piece and a leading edge of the trailing length piece, so that the continuous web is torn
Implementation Method 2
A longitudinal opening guide is introduced between the confronting side surfaces, which forces the confronting side surfaces away from one another to open the opening
Implementation Method 3
the pouches are finally sealed by a sealing section arranged at the outer circumference of the filler wheel and provided with heated sealing surfaces abutting against the folded web material for sealing the opening
Data Source
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AI summary
The present invention relates to a method for making pouches (P) providing a continuous web (18); folding the web (18) to provide confronting side surfaces (22) joined along a bottom edge (24); forming a vertical seal (26) between the confronting side surfaces (22), thereby providing a series of adjacent pockets (28) having opposite side walls with each pocket having an unsealed opening (29) along a top edge (31); filling the pockets (28) through the unsealed opening (29) with material; sealing the unsealed opening (29). In the inventive method, which facilitates handling of the continuous web forming the pouches, the web (18) is perforated by a perforation (46) between a leading length piece (48) of the web (18) adapted to form a leading pocket and a trailing length piece (48) of the web (18) adapted to form a trailing pocket (28), and the distance between a trailing edge (26b) of the leading length piece (48) and a leading edge (26a) of a trailing length piece (48) is increased for tearing the leading and the trailing lengths pieces (48) apart at the perforation (46). The apparatus according to the present invention for making pouches comprises perforation means (36, 38) for perforating the continuous web (18) between a leading length piece (48) of the web (18) adapted to form a leading pocket (28) and a trailing length piece (48) of the web (18) adapted to form a trailing pocket (28), and tearing means (4, 6) adapted to tear the leading length piece (48) and the trailing length piece (48) apart by increasing the distance between a trailing edge (26b) of the leading length piece (48) and a leading edge (26a) of the trailing length piece (48).