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Thermally formed stacked disc filter

  • US 4,732,677 A
  • Filed: 09/17/1986
  • Issued: 03/22/1988
  • Est. Priority Date: 09/17/1986
  • Status: Expired due to Fees
First Claim
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1. Fluid filter element for filtering a fluid filtrate comprising a stack of identical discs, said discs being formed from an air laid, nonwoven batt of randomly arrayed fibers, said batt including a thermoplastic component, said thermoplastic component at least partially fusing the fibers of the batt to define a disc having a stable, predetermined, self-supporting shape so that said stack of discs is structurally self-supporting and does not require supporting structural elements other than the discs themselves, said discs being contoured such that when the discs are stacked upon one another a flow path for the filtrate through the discs is defined both radially and axially with respect to the discs, each of said discs defines an axis and each of said discs including opposed, continuous, uninterrupted radially extending surfaces on opposite side thereof, each of said surfaces includes portions offset axially from the remainder of the corresponding radially extending surface, said axially offset portions engaging corresponding portions of adjacent discs to define said flow paths between said discs, one of said axially offset portions extending in one axial direction from the outer circumferential surface of the disc and the other axially offset portion extending in the opposite axial direction from the inner circumferential surface of the disc.

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