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ROLLER STRIP FILTER FOR PURIFYING AIR OR GASES

  • US 3,695,008 A
  • Filed: 01/15/1970
  • Issued: 10/03/1972
  • Est. Priority Date: 01/21/1969
  • Status: Expired due to Term
First Claim
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1. A roller-strip filter comprising:

  • a mounting framework fitting into a wall opening, said framework including a rectangular structure with a pair of vertical member and a pair of transverse horizontal members surrounding an air passage, said vertical members defining a pair of coplanar sealing surfaces on opposite sides of said air passage;

    strip-guiding means on said structure including a pair of grids spanning said air passage with sufficient separation to form a path therebetween for a vertically movable filter strip advancing across said opening along said sealing surfaces;

    a pair of uprights provided with fastening means removably attaching same to said vertical members outside said sealing surfaces;

    a feed roller supplying said filter strip and having a first horizontal shaft journaled on said uprights adjacent one of said horizontal members;

    a wind-up roller taking up said filter strip and having a second horizontal shaft journaled on said uprights adjacent the other of said horizontal members;

    drive means for said second shaft on one of said uprights; and

    a pair of pressure elements carried on said framework for holding the lateral edges of said filter strip tight against said sealing surfaces.

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