Plier-Based Bag Seizing Mechanism for Permeable Fabric Packaging
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Solution Overview
Problem
Existing machines for automatic packaging of loose, granular products cannot effectively use air permeable fabric bags due to issues with vacuum suction cups, which allow air to permeate and fail to seize only one bag at a time, compromising the packaging process.
Innovation Solution
A machine that uses adjustable pliers to seize air permeable or impermeable fabric bags one at a time, allowing for precise handling and filling, with adhesive or needle pliers to grip the bags and pneumatic cylinders to manage the filling process, enabling the use of both permeable and impermeable fabric bags.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If vacuum suction cups are used to seize bags, then automatic handling is achieved, but air permeable fabric bags cannot be seized because air permeates through the fabric
Solution Approach 1:
The patent replaces the vacuum suction cup system with a mechanical plier-based seizing system. The pliers physically grip the bag mouth and hold it open, providing reliable seizing of air permeable fabric bags without relying on vacuum pressure that would escape through the permeable material.
Solution Approach 2:
The patent introduces an intermediary mechanism (the pliers with jaw) between the seizing system and the bag. The pliers act as a mediator that can maintain grip on permeable fabric without requiring vacuum sealing, thus enabling handling of both permeable and impermeable bags.
2Productivity
If vacuum suction cups are used to seize bags, then handling speed is improved, but multiple bags may be seized at once instead of one, compromising the packaging process
Solution Approach 1:
The patent applies local quality by designing the plier jaw to engage with a specific localized feature of the bag (the mouth opening). This localized engagement ensures that only one bag at a time can be properly gripped and processed, preventing multiple bags from being seized simultaneously while maintaining high handling speed.
3Reliability
If air impermeable material layers are added to cover permeable bags, then vacuum suction can be maintained, but manufacturing complexity and cost increase
Solution Approach 1:
Instead of modifying the bag material to make it impermeable (the conventional approach), the patent inverts the solution by modifying the seizing mechanism to work with permeable material. The pliers provide mechanical retention rather than vacuum retention, eliminating the need for additional impermeable layers and reducing manufacturing complexity.
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
Enables the efficient and accurate packaging of products in air permeable or impermeable fabric bags, ensuring only one bag is handled at a time, allowing for effective filling and sealing without the drawbacks of existing technologies, and accommodating a range of product weights and bag sizes.
Implementation Method 1
suitable pliers, which operate automatically, seizes the single upper layer of the first bag, precisely in the central position of the fabric edge
Implementation Method 2
pneumatic cylinders to manage the filling process
Data Source
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AI summary
The machine of the invention enables to handle, to fill and to automatically wrap up permeable or impermeable to air fabric bags with loose, granular or pulverized products or already wrapped up in other paper, plastic or composite material small bags. The machine assures to seize a single bag (9) one at a time by the use of an adhesive (15) or with needle pliers (42) so as to provide a steady handling of the bags to be wrapped up.