Air sealing rewind construction for roll-type filter

Claim 1

IN A ROLL-TYPE AIR FILTER INCLUDING A FILTER MEDIA SUPPLY SECTION, A FILTER MEDIA REWIND SECTION, AN AIR PASSAGE INTERMEDIATE THE SUPPLY SECTION AND SAID REWIND SECTION THROUGH WHICH A STREAM OF AIR TO BE FILTERED IS PASSED, FILTER MEDIA EXTENDING THROUGH SAID AIR PASSAGE FROM SAID SUPPLY SECTION TO SAID REWIND SECTION SO SAID STREAM OF AIR IS PASSED THROUGH SAID MEDIA IN SAID AIR PASSAGE IN FILTERING RELATION, MEDIA CONVEYOR MEANS INCLUDING AN ENDLESS BELT CONVEYOR SUPPORTING SAID MEDIA IN SAID AIR PASSAGE AND MOVING SAID FILTER MEDIA FROM SAID SUPPLY SECTION THROUGH SAID AIR PASSAGE TO SAID FILTER MEDIA REWIND SECTION, SAID CONVEYOR PASSING AROUND AND IN CONTACT WITH ROLLER MEANS DISPOSED IN SAID REWIND SECTION, AND MEANS SEALING THE SIDES OF SAID MEDIA PASSED THROUGH SAID AIR PASSAGE AND PREVENTING AIR LEAKAGE AROUND THE SIDES OF SAID MEDIA, (A) A FILTER MEDIA REWIND ROLL RECEIVING AND REWINDING FILTER MEDIA WHICH HAS PASSED THROUGH SAID AIR PASSAGE SECTION FROM SAID SUPPLY SECTION, SAID REWIND ROLL HAVING OPOSITE END SPINDLES AND BEING DISPOSED GENERALLY PARALLEL TO SAID ROLLER AND UPSTREAM OF SAID ROLLER, RELATIVE TO THE DIRECTION OF FLOW OF GAS TO BE FILTERED THROUGH SAID AIR PASSAGE, AND MEANS URGING A PERIPHERAL SECTION OF SAID REWIND ROLL, INCLUDING FILTER MEDIA WOUND THEREON, AGAINST SAID CONVEYOR AND URGING SAID CONVEYOR AGAINST SAID ROLLER MEANS AT THE NIP FORMED AT THE LINE OF CONTACT BETWEEN SAID CONVEYOR AND SAID REWIND ROLL PERIPHERY, SAID LINE OF CONTACT DEFINING A REWIND ROLL DRIVING ENGAGEMENT LINE WHICH IS TANGENTIAL TO SAID REWIND ROLL AT THE POINT OF CONTACT OF SAID REWIND ROLL AND SAID CONVEYOR; (B) A STATIONARY PANEL EXTENDING CONTINUOUSLY ACROSS THE WIDTH OF SAID REWIND SECTION RELATION, TO PREVENT AIR TO BE FILTERED FROM PASSING AROUND SAID STATIONARY PANEL, SAID PANEL TERMINATING ADJACENT SAID NIP IN AN UPPER SEALING EDGE PARALLEL TO THE AXIS OF SAID REWIND ROLL AND SAID SEALING EDGE CONTINUOUSLY CONTACTING MEDIA WOUND ON SAID REWIND ROLL PREVENTING THE PASSAGE OF AIR BETWEEN SAID SEALING EDGE AND SAID REWIND ROLL; AND, (C) SPINDLE RECEIVING CHANNEL MEANS FORMING SUBSTANTIALLY STRAIGHT CHANNELS, ONE OF SAID CHANNEL MEANS BEING DISPOSED ON EACH OF THE OPPOSITE SIDES OF SAID REWIND SECTION RECEIVING AND SUPPORTING SAID SPINDLES OF SAID REWIND ROLL AND SAID CHANNEL MEANS BEING DISPOSED WITHIN SAID REWIND SECTION, SAID SPINDLES OF SAID REWIND ROLL REMOVING THROUGH SAID CHANNEL MEANS IN RESPONSE TO ACCUMULATION OF FILTER MEDIA ON SAID REWIND ROLL WHILE MAINTAINING CONTACT BETWEEN SAID REWIND ROLL, INCLUDING SAID MEDIA WOUND THEREON, AND BOTH SAID SEALING EDGE OF SAID STATIONARY PANEL AND SAID CONVEYOR MEANS ALONG SAID DRIVING ENGAGEMENT LINE.