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Web drying roll

  • US 4,183,149 A
  • Filed: 03/03/1978
  • Issued: 01/15/1980
  • Est. Priority Date: 03/03/1978
  • Status: Expired due to Term
First Claim
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1. In a hollow cylindrical dryer drum having an outer shell and mounted for rotation for drying contact with a traveling fibrous web, the combination comprising:

  • means connected to the drum for directing a flow of steam into the interior of the drum for heating the peripheral outer surface of the shell;

    a condensate removal means within the drum for removing condensate from the inner surface of the periphery of the shell;

    a bristle support within the drum extending axially along the inner periphery having a plurality of cantileverly supported bristles extending radially outwardly into close running contact with the inner peripheral shell surface and substantially uniformly distributed along the axial length;

    said bristles having sufficient stiffness for resisting the movement of condensate with rotation of the drum and generating a visual high level of turbulence in the condensate decreasing the rotational speed of the layer of condensate carried with the drum shell causing the layer of rimming condensate to collapse for a substantial increase in heat transfer from the steam to the drum shell;

    and means for stationarily mounting said bristle support within the drum.

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