Vacuum Cleaner Bag Holding Plate With Slit-Sealed Membrane

The patent applies local quality by creating a thickening specifically in the area of the slit rather than uniformly throughout the membrane. This localized structural modification provides the necessary stabilization and restoring force only where needed, while keeping the rest of the membrane simple and easy to manufacture. The thickening acts as a reinforcement zone that ensures reliable sealing without complicating the overall membrane design.

The patent applies parameter changes by modifying the physical structure of the membrane through a thickening in the slit area. This structural parameter change increases the restoring force of the elastic material, ensuring that after being stretched open during operation, the membrane reliably returns to its closed resting position. The thickening alters the mechanical properties locally to provide sufficient elastic recovery without changing the material composition.

The patent resolves this contradiction by applying local quality - creating a thickening only in the specific area of the slit where it is most needed for providing restoring force. This localized reinforcement allows the membrane to maintain simple, cost-effective manufacturing processes for the majority of its structure, while only adding material complexity where it directly contributes to improving the closing function. The rest of the membrane remains simple and easy to produce.