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US 5,207,812 AGranted
Filter cartridge
AssigneeW. L. Gore & Associates, Inc.
InventorsGregory S. Tronto, Raymond Wnenchak
Life of this patent
Estimating the term…
Abstract
A pleated filter cartridge for removing particles or dust from a gas stream is described. The cartridge is made of a perforated support tube, a pleated filter medium around said tube, and end caps into which the ends of the filter medium, and the tube are sealed, wherein the pleated filter medium has less than seven pleats per inch.
Claims4
A pleated filter cartridge consisting essentially of:
- a. a perforated support tube,
- b. a pleated filter medium around said tube, comprising a laminate of a nonwoven or felt backing and an expanded porous polytetrafluoroethylene,
- c. end caps into which the ends of the filter medium, and the tube is sealed,
- wherein the pleated filter medium has less than seven pleats per inch and is not supported by any external support other than the structure recited in elements a), b) and c).
1 more element
Dependencies are inferred from the claim text.