Solvent recovery

Claim 1

AN ADSORBER FOR RECOVERING SOLVENT FROM MIXTURES OF SOLVENT VAPORS AND AIR, COMPRISING A VESSEL AND A BED OF ADSORBENT MATERIAL SUPPORTED IN SAID VESSEL, MEANS FOR INTRODUCING A MIXTURE OF AIR AND SOLVENT VAPOR INTO SAID VESSEL SO AS TO PASS THROUGH SAID BED FOR ADSORPTION OF SAID SOLVENT BY SAID BED, AND MEANS FOR INTRODUCING STEAM INTO SAID VESSEL AT A ZONE SPACED FROM SAID BED AND FOR MOVING SAID STEAM FROM SAID ZONE IN A DIRECTION AWAY FROM SAID BED SO AS TO DISPLACE AIR FROM SAID VESSEL AT ONE PERIOD OF TIME AND FOR PASSING STEAM THROUGH SAID BED TO REMOVE THE SOLVENT THEREFROM AT A SUBSEQUENT PERIOD OF TIME, SAID STEAM-INTRODUCING MEANS COMPRISING DUCT MEANS FOR DELIVERING STEAM WITHIN SAID CANOPY AT POINTS ABOVE AND BELOW, SAID BED, THE CONSTRUCTION AND ARRANGEMENT BEING SUCH THAT THE STEAM INTRODUCED FOR DISPLACING THE AIR FROM SAID VESSEL DOES NOT PASS THROUGH A SOLVENT-LADEN BED OF ADSORBENT MATERIAL.