Air Filtration System for a Small Rigid File
Original Publication Date: 1986-Mar-01
Included in the Prior Art Database: 2005-Mar-08
The recirculating filter cartridge is formed of four components, shown in the exploded view of Fig. 1, upper and lower housing elements 5 and 6 respectively; a sheet of filter media 7 and pressure-sensitive adhesive media 8 having adhesive on both sides. The lower housing element 6 includes radial media support ribs 9 extending from the central opening to the peripheral wall 10. Peripheral wall 10 includes spaced projections 11 that engage the filter housing top element 5 in the assembled condition to form air inlet opening therebetween. The recirculating filter media 7 is bonded to the rib surfaces 13 and along the margins to the shoulder 14 that extends continuously along the inside of peripheral wall 10.