Filtration element having a variable density sidewall
OwnerHoward Morganinventor
Life of this patent
Estimating the term…
Abstract
A filtration element formed of overlapping fibrous strands or components. Those fibrous strands at the side of the filtration element which first receives the gas flow being of one thickness and those fibrous strands at the side of the filtration element where the gas flow exits being of a thickness substantially less than the one thickness of the strands at the opposite sidewall of the element.
Claims7
A filtration element comprising a sidewall part, said sidewall part having a first side which the gas flow through the element first contacts and a second side from which said gas flow exits said element, said sidewall part including overlapping fibrous strands, those said strands at said sidewall part first side being of one thickness and those said strands at said sidewall part second side being of a thickness substantially less than the thickness of said sidewall part first side.
A method of forming a filtration element comprising the steps of:
- a. expelling thermoplastic material through a nozzle by gas pressure to form strands of fibrous material,
- b. heating said material prior to its expulsion from said nozzle,
- c. forming said strands of fibrous material into a sidewall of said filtration element, and
- d. varying the thickness of said strands with the thicker of the strands being at the side of the filtration element where the gas flow through the element first flows.
Dependencies are inferred from the claim text.