Nonwoven Vacuum Filter Bag Block Bottom Without Central Seam
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Solution Overview
Problem
Filter bags made from non-woven materials for vacuum cleaners face challenges in forming a stable block bottom due to material pliability, leading to instability and complex, costly production processes with central weld seams that complicate the attachment of retaining plates and often result in leaks.
Innovation Solution
The filter bag design stabilizes the base by overlapping the inner and outer sides of the non-woven material casing and connecting them with a weld seam, allowing for self-stabilization without additional fastening, and incorporates pre-breaks and folding techniques to enhance stability and ease of assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a non-woven material is used for the filter bag, then the dust storage capacity and performance are improved, but the ability to form a stable block bottom deteriorates due to material pliability
Solution Approach 1:
The patent transitions from a two-dimensional flat bottom to a three-dimensional block bottom by folding the side walls upward and welding them together. This dimensional transformation creates a rigid block structure that provides stability while maintaining the flexibility benefits of non-woven material for dust storage capacity.
Solution Approach 2:
The patent creates a composite structure by combining the non-woven filter material with a block bottom formed through folding and welding. This composite construction integrates the dust-storage advantages of non-woven material with the structural stability of a rigid block bottom, resolving the contradiction between material pliability and bottom stability.
2Stability of the object's composition
If a central weld seam is used to form the block bottom, then the bottom stabilization is achieved, but the complexity of attaching retaining plates increases and leaks become more difficult to avoid
Solution Approach 1:
The patent divides the bottom stabilization function into multiple weld seams positioned at different locations (front, rear, and side walls) rather than using a single central weld seam. This segmentation allows retaining plates to be attached at multiple points around the perimeter, simplifying the attachment process and reducing leak risks while maintaining bottom stability.
Solution Approach 2:
The patent introduces side wall folds as intermediary structures that connect the front and rear walls to form the block bottom. These side walls act as mediators that provide additional welding surfaces and attachment points for retaining plates, eliminating the need for complex central weld seam arrangements and reducing leak potential.
3Stability of the object's composition
If additional holding plates are attached to stabilize the base, then the base stability is improved, but the device complexity and production costs increase
Solution Approach 1:
The patent enables the filter bag to stabilize its own base through the block bottom structure formed by folding and welding the side walls. The structure is self-sufficient and does not require additional external holding plates for stabilization, thereby reducing device complexity and production costs while maintaining base stability.
Solution Approach 2:
The patent merges the base stabilization function into the block bottom structure itself by forming rigid sides that extend upward from the bottom. This integration eliminates the need for separate holding plates, as the block bottom's inherent structure provides the necessary stability, simplifying the overall device design and reducing production 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
This design provides a stable filter bag base that can withstand various vacuum cleaner requirements without additional holding plates, simplifies the production process, reduces costs, and minimizes leaks by using a continuous weld seam for attaching the retaining plate.
Implementation Method 1
the overlapped area being at least partially connected by at least one weld seam
Data Source
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AI summary
The invention relates to a filter bag for a vacuum cleaner,comprising a tubular bag, which consists of an outer covering that has at least one nonwoven layer, with a first end region (2), which is at least partially sealed and a second sealed end region (5) that lies opposite the first end region. The first end region is folded to form a base. The invention also relates to a method for producing a filter bag of this type.