Pleated poly(tetra-fluoro ethylene) filter cartridge
AssigneeMemtec America Corporation
InventorsAnthony C. Shucosky, William P. Seeley
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Abstract
A pleated, all poly(tetra-fluoro ethylene) filter element (20) incorporating a poly(tetra-fluoro ethylene) filter membrane (24) is shown and described. The membrane is supported by an all poly(tetra-fluoro ethylene) paper (26) and (28), which permits filtrate to pass through the paper and across the poly(tetrafluoro ethylene) membrane. A sandwich is formed by placing a layer of poly(tetra-fluoro ethylene) filter membrane (24) between the two layers of poly(tetra-fluoro ethylene) support paper, (26) and (28), and the sandwich is then pleated prior to assembly around a core (14) and between end caps (12) and (18), which are bonded to the poly(tetra-fluoro ethylene) paper and poly(tetrafluoro ethylene) filter membrane by a hot-melt process.
Claims5
In a pleated filter cartridge having a poly(tetra-fluoro ethylene) membrane filter medium, the improvement comprising:
- providing a continuous support web on both faces of said membrane and pleated with said membrane, wherein said web is a nonwoven paper of thermally bonded poly(tetra-fluoro ethylene) fibers, said web has a thickness of less than about 0.2 mm, and said web is substantially free of materials other than poly(tetra-fluoro ethylene).
Dependencies are inferred from the claim text.