Abstract: A clean room having provision for supplying filtered air vertically therethrough under substantially laminar flow conditions is disclosed, and which includes a filter bank comprising a supporting latticework composed of a plurality of interconnected members which define rectangular open areas, and a plurality of high efficiency air filters positioned on the supporting latticework. The interconnected members of the latticework include a plurality of parallel, laterally spaced apart lengthwise members, and a plurality of cross members extending laterally between the lengthwise members, and with the ends of the cross members abutting an intermediate length of the lengthwise members. In one embodiment, each of the members of the latticework includes an integral, upwardly extending post, which is adapted to be engaged by a retainer for interconnecting the members, and also by a support bracket for supporting the latticework from an overhead ceiling.

Abstract: A clean room having provision for supplying filtered air vertically therethrough under substantially laminar flow conditions is disclosed, and which is characterized by the substantial absence of migration of dust or dirt particles laterally through the room. The clean room includes a filter bank comprising a supporting latticework composed of a plurality of interconnected members which define rectangular open areas, and a plurality of high efficiency air filters positioned on the supporting latticework. Each of the members of the latticework has a generally V-shaped outline in cross section with the angular extent of the V-shaped outline being adapted to provide a substantially laminar flow therealong, and so as eliminate any substantial turbulence below the members of the latticework. Such turbulence has been found to entrain dust or dirt particles and move the same laterally through the room, and the elimination of such turbulence effectively eliminates the lateral migration problem.

Abstract: A high efficiency particulate air filter is disclosed which has a channel formed in the front peripheral surface thereof, with the channel being substantially filled with a sealant which comprises an essentially non-volatile and non-hardening gum-like material. The physical properties of the sealant render the sealant able to effect sealing engagement with a mating flange mounted in the filter housing, and also permit the flange to be withdrawn from the sealant without an appreciable amount of the sealant adhering to the flange, to thereby avoid the build up of potentially contaminated sealant on the flange when the filter is changed. A method of fabricating the filter is also disclosed, which results in the sealant forming a substantially uniform and continuous closed strip which is characterized by the absence of a butt end joint.