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Method and apparatus for treating open-weave substrates with foam

  • US 4,343,835 A
  • Filed: 12/17/1980
  • Issued: 08/10/1982
  • Est. Priority Date: 12/17/1980
  • Status: Expired due to Fees
First Claim
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1. In an apparatus for the treatment of an open-weave substrate with a foam, which apparatus comprises means for conveying said open-weave substrate, foam generating means, foam conduit means, foam applicator means, and orifice means in the top of said foam applicator means to provide exit of the foam for contact thereof with said open-weave substrate as the open-weave substrate travels across said orifice;

  • the improvement of having situated above said orifice means an auxiliary component means, said auxiliary component means comprising two or more angled shear strips to shear said foam spaced apart from each other and enclosed at each end by end means, said shear strips straddling said orifice and together with said end means defining a chamber spaced above said orifice having open top and bottom sides for sequential contact of both sides of said open-weave substrate with the foam as said open-weave substrate travels across said orifice and both open top and bottom sides of said chamber of said auxiliary component means;

    said angled shear strips positioned (a) essentially parallel with the length of said orifice and at an angle of from 3°

    to 90°

    to the plane of the top of said foam applicator means and (b) defining a space between said angled shear strips and the surface of said foam applicator means to permit passage of the open-weave substrate therebetween.

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