Abrasive work back-up to recondition doctor blade

Claim 1

THE COMBINATION IN A COATING DEVICE FOR A TRAVELING PAPER WEB OR THE LIKE, OF A LONGITUDINALLY EXTENDING BACKING ROLL HAVING A RESILIENT DEFORMABLE PERIPHERAL COVER FOR SUPPORTING A RESILIENT DEFORMABLE PERIPHERAL COVER LONGITUDINALLY AND TRANSVERSELY FLEXIBLE DOCTOR BLADE EXTENDING AXIALLY WITH SAID BACKING ROLL AND DEFINING WITH SAID BACKING ROLL A NIP THROUGH WHICH SAID WEB PASSES, MEANS FOR URGING SAID DOCTOR BLADE AGAINST THE BACKING ROLL AND A WEB THEREON TO LOAD THE FLEXIBLE DOCTOR BLADE AGAINST THE ROLL AND WEB, MEANS ON THE ONCOMING SIDE OF THE NIP FOR APPLYING AN EXCESS OF COATING COMPOSITION TO THE SIDE OF THE WEB ON WHICH THE DOCTOR BLADE BEARS, SAID DOCTOR BLADE EXTENDING SUBSTANTIALLY THE FULL LENGTH OF SAID BACKING ROLL AND EXERTING AS PRESSURE AGAINST SAID BACKING ROLL AND TRAVELING WEB WHICH LOCALLY DEFORMS THE WEB AND THE BACKING ROLL OVER THE LENGTH OF THE BACKING ROLL, AND SAID BACKING ROLL BEING CHARACTERIZED BY A GRIT CONTAINING SURFACE WHICH WEARS SAID DOCTOR BLADE IN PORTIONS OF THE BACKING ROLL EXPOSED TO THE DOCTOR BLADE AND WHICH SURFACE ALSO PROVIDES RACTION FOR THE TRAVELING WEB.