Inline filter apparatus

  • US 5,820,646 A
  • Filed: 04/26/1996
  • Issued: 10/13/1998
  • Est. Priority Date: 04/26/1996
  • Status: Expired due to Term
First Claim
Patent Images

1. An air filter cartridge device for inserting into a duct having an upstream side and downstream side with flow passing from the upstream side to the downstream side through the filter cartridge, comprising:

  • structurally self-supporting fluted filtering media having an outer portion, the filter media comprising a plurality of substantially parallel flutes extending along the direction from the upstream side to the downstream side;

    an integrally formed impermeable layer enclosing the outer portion of the fluted filter media forming an outer wall of the duct over the fluted filter media and connecting to upstream and downstream portions of the duct; and

    ,means for forming a seal between the integrally formed impermeable layer and the duct on the downstream side of the filter media when the filter media is inserted into the duct.

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