Xerographic method

Claim 1

IN A METHOD OF XEROGRAPHIC REPRODUCTION WHEREIN A XEROGRAPHIC PLATE COMPRISING A LAYER OF PHOTOCONDUCTIVE VITREOUS SELENIUM IN CONTINUOUS ELECTRICALLY COUPLED RELATION WITH AN ELECTROCONDUCTIVE BACKING MEMBER IS REPEATEDLY SUBJECTED TO AN OPERATIONAL CYCLE WHICH COMPRISES IMPOSING AN ELECTROSTATIC CHARGE ON ITS SURFACE TO SENSITIZE THE PLATE, EXPOSING THE SENSITIVE PLATE TO PRODUCE AN ELECTROSTATIC LATEN IMAGE THERON OF ELECTROSTATIC CHARGES IN IMAGE FORMATION AND TAKING OFF AN IMAGE CORRESPONDING TO SAID ELECTROSTATIC LATTENT IMAGE WITH THE RESULTANT OCCURRENCE OF FATIGUE OF SAID PLATE UPON COMPLETION OF AN OPERATIONAL CYCLE, THE IMPROVEMENT COMPRISING ACCELERATING RECOVERY BEFORE REPEATING AN OPERATIONAL CYCLE OF THE FATIGUED XEROGRAPHIC PLATE COMPRISING BETWEEN SAID OPERATIONAL CYCLES HEATING SAID PLATE TO BRING IT TO A TEMPERATURE IN THE RANGE FROM ABOUT 110*F. TO ABOUT140*F. IN NOT GREATER THAN ABOUT ONE MINUTE AND MAINTAINING SAID LAYER AT A TEMPERATURE WITHIN SAID RANGE FROM ABOUT 3/4 TO 3 MINUTES UNTIL SUBSTANTIAL RECOVERY OF SAID LAYER HAS BEEN EFFECTED, AND THEN IN NOT GREATER THAN ABOUT ONE MINUTE COOLING SAID PLATE TO AT LEAST ABOUT 80* F., THE HEAT TO WHICH SAID LAYER IS SUBJECTED TO BRING IT UP TO SAID TEMPERATURE WITHIN SAID RANGE BEING SUBSTANTIALTO MAINTAIN ITS TEMPERATURE WITHIN SAID RANGE.