Apparatus for drying porous paper

Claim 1

A DRYER FOR POROUS WEBS COMPRISING: (A) A ROTATABLY MOUNTED SIEVE ROLL CLOSED AT ITS ENDS AND HAVING A FORAMINOUS SIDEWALL; (B) AN INFEED STATION ADJACENT SAID SIEVE ROLL AND INCORPORATING MEANS FOR FEEDING A CONTINUOUS LENGTH OF A MOIST WEB ONTO THE FORAMINOUS SIDEWALL OF THE SIEVE ROLL AS THE SIEVE ROLL ROTATES PAST SAID STATION, SAID WEB HAVING A WIDTH MATCHING THE LENGTH OF SAID FORAMINOUS SIDEWALL; (C) AN OUTLET STATION ADJACENT SAID SIEVE ROLL AND INCORPORATING MEANS FOR REMOVING THE CONTINUOUS LENGTH OF WEB FROM SAID FORAMINOUS SIDEWALL FOLLOWING THE DRYING THEREOF, SAID OUTLET STATION BEING SPACED PERIPHERALLY OF THE SIEVE ROLL FROM SAID INFEED STATION SO THAT SAID WEB COVERS A MAJOR PORTION OF THE PERIPHERY OF SAID FORAMINOUS SIDEWALL AND THAT A FULL LENGTH MINOR PORTION OF THE FORAMINOUS SIDEWALL INTERMEDIATE SAID INFEED AND SAID OUTLET STATIONS IS NOT COVERED BY THE WEB; (D) CONVEYING MEANS FOR TRANSPORTING SAID WEB TO SAID INFEED STATION AND FROM SAID OUTLET STATION; (E) AIR SUPPLY MEANS FOR PROVIDING A MOVING STREAM OF LOW PRESSURE DRYING AIR; AND (F) AN AIR DUCT LOCATED ADJACENT THE OUTER SURFACE OF SAID FULL LENGTH MINOR PORTION OF SAID FORAMINOUS SIDEWALL AND IN COMMUNICATION WITH SAID AIR SUPPLY MEANS, SAID DUCT DIRECTING THE MOVING STREAM OF DRYING AIR INTO SAID SIEVE ROLL THROUGH SUBSTANTIALLY THE LENGTH OF SAID FULL LENGTH MINOR PORTION IN A SUBSTANTIALLY RADIAL DIRECTION AND FROM THE SIEVE ROLL INTERIOR THROUGH SAID MAJOR PORTION OF SAID FORAMINOUS SIDEWALL AND THE WEB COVERING IT, WHEREBY THE MOISTURE IS UNIFORMLY REMOVED FROM THE WEB BY THE DRYING AIR PASSING THERETHROUGH.