Vacuum Cleaner Filter Bag With Localized Scrim Connections

The patent applies local quality by implementing a multi-layer filter material structure where different layers serve specific functions: a first layer with unconnected staple fibers for dust storage, a second scrim layer for mechanical stability, and a third layer for fine filtration. The layers are connected only in specific areas (impact zones) rather than uniformly across the entire surface, providing localized reinforcement where needed while maintaining high dust storage capacity in other areas.

The patent employs composite materials by combining three different filter material layers into a single integrated structure. The first layer uses unconnected staple fibers for maximum dust storage, the second layer uses scrim material for tensile strength and structural integrity, and the third layer provides fine filtration. This composite structure achieves both mechanical stability and low pressure drop by distributing functions across different material types rather than using a single heavy-duty material throughout.

The patent applies segmentation by dividing the filter material into distinct functional layers rather than using a uniformly connected structure. The unconnected staple fibers in the first layer are segmented from the scrim layer, allowing them to move independently and trap dust particles while the scrim layer provides structural support. This segmentation enables each layer to perform its specific function optimally without compromising the other.

The patent applies partial action by implementing connections only in the impact area where the air flow directly impinges on the filter material, rather than connecting the entire filter material. The connection points are strategically positioned to provide reinforcement exactly where mechanical stress occurs, while leaving the rest of the filter material unconnected to maintain maximum air permeability and dust storage capacity.