US PATENT SUBCLASS 34 / 453
.~.~.~.~ Using vacuum 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}
452  DF  .~.~.~ Gas or vapor drawn through treated material {1}
453.~.~.~.~ Using vacuum roller

DEFINITION

Classification: 34/453

Using vacuum roller:

(under subclass 452) Process wherein the sheet, web, or strand is transported over a cylinder having a vacuum inside that draws the gas or vapor through the material.