Space filter

Claim 1

A FILTER SUPPORT CONSTRUCTION AND A COMPLEMENTAL FILTER CARTRIDGE HAVING FLEXIBLE FILTER MATERIAL ARRANGED IN PLEATS DISPOSED TRANSVERSELY OF FLEXIBLE SIDE WALLS AND EXTENDING FROM RELATIVELY RIGID END WALLS, COMPRISING, A RECTANGULAR OPEN FRAME HAVING END MEMBERS AND CONNECTING SIDE MEMBERS, A PLURALITY OF UPSTANDING V SECTIONED WIRE GRIDS EXTENDING ACROSS SAID FLANGE TO SUPPORT THE PLEATS OF A COMPLEMENTAL FILTER CARTRIDGE, AND A V SECTIONED WIRE GRID AT OPPOSITE ENDS OF THE FRAME, HAVING CORNER AND INTERMEDIATE END WIRES EXTENDING VERTICALLY FROM SAID FRAME, AND MEANS FOR RIGIDIFYING SAID END WIRES, A FILTER CARTRIDGE DISPOSED ON SAID WIRE GRIDS HAVING RELATIVELY STIFF END PANELS ENGAGING SAID VERTICALLY EXTENDING END WIRES, PLEATED FILTER MATERIAL COMPLEMENTALLY SUPPORTED ON SAID V GRIDS, WITH ITS OPPOSITE ENDS SECURED TO THE OUTER EDGES OF SAID END PANELS, SAID FLEXIBLE PLIANT SUBSTANTIALLY RECTANGULAR SIDE PANELS CONNECTING THE SIDE EDGES OF SAID END PANELS AND HAVING THE SIDE EDGES OF SAID FILTER MATERIAL SEALINGLY SECURED TO THE INSIDE SURFACE OF SAID PLIANT PANEL SIDE PANELS, SAID FRAME HAVING AN OUTWARDLY INCLINED SEALING PORTION EXTENDING OPPOSITELY FROM SAID UPSTANDING V GRIDS AND A SKIRT PORTION EXTERIOR THEREOF, AND SAID CARTRIDGE END AND SIDE MEMBERS EXTENDING BELOW THE LOWER LOOPS OF SAID PLEATED FILTER MATERIAL, AND SEALINGLY ENGAGING THE INCLINED SEALING PORTION OF SAID FRAME, AND RESILIENT BLADE AFFIXED ALONG ONE EDGE OF THE SKIRT PORTIONS OF SAID END MEMBERS AND BEARING AGAINST THE OUTER SURFACE OF THE CARTRIDGE END MEMBERS EXTENDING BELOW THE LOWER LOOPS TO ASSIST IN THE SEALING ENGAGEMENT OF THE CARTRIDGE END MEMBERS AGAINST THE INCLINED SEALING PORTION OF THE FRAME END MEMBERS.