Rolled Filter Cartridge With Interposed Conductive Layer

The patent applies the principle of converting harm into benefit by using the electrically conductive layer to serve dual purposes: improving filtration efficiency while simultaneously providing a grounding path to dissipate static energy. The conductive layer is electrically connected to ground, transforming the potential hazard of static buildup into a beneficial grounding mechanism that prevents sparks and ignition.

The patent applies the self-service principle by making the electrically conductive layer inherently grounded through its integration with the filter cartridge structure. The conductive layer automatically provides both filtration enhancement and static dissipation functions without requiring external power sources or complex charging mechanisms, simplifying manufacturing while maintaining effectiveness.

The patent applies the merging principle by combining the filter medium layers with the electrically conductive layer into a single integrated structure. The conductive layer is positioned between adjacent layers of filter medium during the rolling process, creating a multi-layered structure where multiple functions (filtration and static dissipation) are achieved simultaneously in one manufacturing operation, reducing overall production time.

The patent applies the segmentation principle by dividing the filter cartridge into distinct functional segments: filter medium layers for filtration, electrically conductive layers for static dissipation, and support structures for mechanical strength. Each segment is manufactured separately and then assembled through a simplified rolling and bonding process, reducing manufacturing complexity while maintaining overall structure strength.