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Self-renewing air filter

  • US 6,843,834 B2
  • Filed: 01/06/2003
  • Issued: 01/18/2005
  • Est. Priority Date: 01/06/2003
  • Status: Active Grant
First Claim
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1. A method for renewing a sheet-type filtering material in an intermittently flowing fluid inside a conduit, said intermittent flow applying a force to the sheet-type filtering material and causing a movement of the sheet-type filtering material, said method comprising:

  • (a) attaching one end of the sheet-type filtering material to a gathering roll;

    (b) stretching the sheet-type filtering material across the conduit such that the filtering material blouses; and

    (c) transferring the force and movement of the sheet-type filtering material, in the direction of fluid flow, to the gathering roll to turn the gathering roll thereby advancing the sheet-type filtering material such that clean filtering material is exposed to the fluid flow.

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