US PATENT SUBCLASS 34 / 458
.~.~.~.~ With vacuum guide roller

Current as of: June, 1999
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34 /   HD   DRYING AND GAS OR VAPOR CONTACT WITH SOLIDS

282  DF  PROCESS {24}
443  DF  .~ Gas or vapor contact with treated material {17}
444  DF  .~.~ Sheet, web, or strand {7}
454  DF  .~.~.~ With contact with heat exchanger (e.g., drum or roller) {2}
458.~.~.~.~ With vacuum guide roller

DEFINITION

Classification: 34/458

With vacuum guide roller:

(under subclass 452) Process wherein a cylinder whose surface is subjected to a vacuum contacts the web being treated primarily for the purpose of directing the web through a series of treating drums.