US PATENT SUBCLASS 34 / 455
.~.~.~.~ Pocket ventilator

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}
455.~.~.~.~ Pocket ventilator {2}
456  DF  .~.~.~.~.~> Vacuum causes web to contact wire or felt
457  DF  .~.~.~.~.~> With guide roller

DEFINITION

Classification: 34/455

Pocket ventilator:

(under subclass 452) Process wherein a loop formed by the web between adjacent drying or web guiding devices is subjected to an aerating flow of gas or vapor into or out of a pocket.