Retaining Plate Closure Flap for Full Vacuum Bag Sealing
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Solution Overview
Problem
Conventional retaining plates for vacuum cleaner filter bags often fail to close properly due to dust particles or fibers accumulating at the opening, preventing the closure flap from sealing effectively, especially when the bag is full.
Innovation Solution
A retaining plate with a closure flap featuring a first region of higher hardness and a second region of lower hardness, where the softer material is thin (less than 1 mm) and surrounds the periphery, allowing the flap to bend and move through filter cakes, ensuring secure closure even when the bag is full.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the closure flap is made of thick soft plastic (1-3 mm) to press dirt particles into the soft plastic, then coarse dirt particles can be partially pressed into the soft plastic, but the closure flap cannot move through the formed filter cake when the bag is filled with a relatively high amount of dirt
Solution Approach 1:
The closure flap is divided into two distinct regions: a first region made of harder material (60-80 Shore D) for structural support and pressing function, and a second peripheral region made of softer material (25-60 Shore A) with thickness of 0.02-0.9 mm for flexibility and mobility through filter cake
Solution Approach 2:
Different regions of the closure flap have different material properties: the central first region has higher hardness for pressing dirt particles, while the peripheral second region has lower hardness and smaller thickness for easy bending and movement through accumulated filter cake
2Ease of operation
If the second material has a thickness of less than 1 mm to allow easy bending, then the closure flap can move through filter cake, but the peripheral region may lack sufficient structural support
Solution Approach 1:
The closure flap merges two materials with different properties into a single integrated structure, where the harder first material provides structural strength and the softer second material provides flexibility, achieving both strength and flexibility requirements simultaneously
Solution Approach 2:
The closure flap uses a composite structure combining two different plastic materials with different hardness values, creating a component that exhibits both the strength of the harder material and the flexibility of the softer material
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
The design enables reliable closure of the vacuum cleaner filter bag, even when filled with a high amount of dirt, by allowing the flexible peripheral region to deform and accommodate filter cakes without preventing the closure flap from sealing.
Implementation Method 1
the second material, at least in part, has a thickness of less than 1 mm. Since in a peripheral region of the closure flap, the softer material comprises a small thickness of less than 1 mm, the closure flap can still move through the formed filter cake
Data Source
AI summary
The invention relates to a retaining plate for a vacuum-cleaner filter bag comprising a through-passage opening and a closure flap for closing the through-passage opening, wherein the closure flap comprises a first region comprising a first material of a first hardness and a second region comprising a second material of a second hardness, wherein the second hardness is at a lower level than the first hardness, wherein the second region is arranged, at least in part, on the periphery of the closure flap, and wherein the second material, at least in part, has a thickness of less than 1 mm.