Nonwoven Vacuum Filter Bag Base with Horizontal Weld Sealing
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Solution Overview
Problem
Filter bags produced from nonwoven materials for vacuum cleaners face challenges in forming a stable block base due to material floppiness and require complex, cost-intensive production methods with vertical seams that are difficult to seal, leading to instability and potential leaks.
Innovation Solution
The filter bag achieves stability by overlapping the inner and outer sides of the casing and connecting them with a partial weld seam, allowing for a self-stabilized base that can withstand various vacuum cleaner requirements without additional fixing, and incorporating pre-folds for further material compression and stabilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a nonwoven material is used for the filter bag, then the dust storage capacity and performance are improved, but the material becomes floppy and difficult to form into a stable block base
Solution Approach 1:
The base is divided into multiple layers formed by folding the tubular bag material. The first end region is folded back onto itself to create a multi-layered block base structure, where each layer contributes to the overall stability. This segmentation allows the floppy nonwoven material to form a stable base through layered construction rather than relying on the material's inherent rigidity.
Solution Approach 2:
The solution transitions from a two-dimensional flat bag structure to a three-dimensional block base by folding the material. The first end region is folded back to create depth and volume, forming a block base that provides structural stability in the third dimension. This dimensional transformation allows the floppy material to achieve stability through spatial configuration.
2Ease of manufacture
If a vertical weld seam is used to connect the tubular bag layers, then the base can be formed, but the seam makes gluing or welding of the retaining plate difficult and leaks are hard to avoid
Solution Approach 1:
Instead of using a vertical weld seam that runs perpendicular to the base, the invention uses a horizontal weld seam that runs parallel to the base. This asymmetric orientation change transforms the welding direction from vertical to horizontal, making the retaining plate installation straightforward and ensuring proper sealing without the complications associated with vertical seams.
Solution Approach 2:
The invention inverts the conventional approach by welding the layers horizontally rather than vertically. Instead of creating a vertical seam that complicates retaining plate attachment, the weld seam is positioned horizontally at the front end of the base, which simplifies the gluing or welding of the retaining plate and ensures leak-free sealing.
3Stability of the object's composition
If additional fixing methods are used to stabilize the base, then the base stability can be improved, but the production process becomes more complex and cost-intensive
Solution Approach 1:
The tubular bag material serves multiple functions: it forms the bag body, creates the block base through folding, and provides its own stabilization mechanism. The multi-layered folded structure at the first end region inherently stabilizes the base without requiring additional fixing components or complex production processes. The material itself performs the stabilization function that would otherwise require separate systems.
Solution Approach 2:
The invention combines the base formation and stabilization functions into a single integrated structure. The folded first end region simultaneously creates the block base shape and provides structural stability, merging what would traditionally be separate functions (base formation and stabilization) into one unified structural solution. This eliminates the need for additional fixing methods and simplifies the production process.
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 method simplifies the production process, enhances base stability, reduces the risk of leaks, and allows for easier attachment of a retaining plate, resulting in a more reliable and cost-effective filter bag with improved dust storage capacity.
Implementation Method 1
the overlapping region being connected at least partially by at least one weld seam
Data Source
AI summary
A filter bag for a vacuum cleaner includes a tubular bag made of a casing which has at least one nonwoven layer. The casing has a first end region which is sealed at least partially and a second sealed end region situated opposite the first end region. The first end region is folded and forms a base.