Abstract: A device for catching and removing germs, viruses and the like from air flowing in an air path of an air supply system. The device includes a cylindrical member or members mounted in the air flow path so that air passing along the air flow path impinges on the periphery of the germ and virus catching and removing member or members to reduce the presence of germs, viruses, contaminants and the like from the air.

Abstract: A wet filter which will not foul washing facilities and plumbing systems, and which will not introduce harmful substances into the environment. The filtering element, which mayk be a resilient, open cell foam material or a woven fabric, is coated with a mixture of oil and a tackifying agent. The oil is preferably a vegetable oil, and the tackifying agent is preferably a dimer acid. The oil and acid are mixed in a volatile carrier, such as ninety-nine percent pure isopropyl alcohol. Preferred proportions are fifty percent dimer acid and ten percent vegetable oil, by volume. The filter is saturated in the mixture. The alcohol is permitted to evaporate, thereby leaving the foam filter thinly yet fully coated with oil and acid. The filter may be washed in water and detergent for renewal. Preferably, a biodegradable detergent mixed with an alkaline substance such as soda ash is employed in washing the filter.

Abstract: A particulate filter for a fluid stream being of preselected thickness with progressively increasing fibrous density from the upstream face toward the downstream face, the filter having a transversely and uniformly extending planar sheet-like adhesive barrier at a preselected location and quantity between the upstream and downstream faces thereof.

Abstract: The invention relates to a method of treating reticulated foam with a controlled migration treatment medium to produce an improved air filter. Reticulated foam is treated with a highly viscous oil that protects the foam from hydrolytic degradation and increases efficiency of the filter without causing unacceptable air restriction of the foam. An improved air filter made from treated and untreated layers of reticulated foam is also shown.

Abstract: A catalytic converter exhaust section comprises a first mounting plate, a second mounting plate, a hollow cylindrically shaped metallic tube and a plurality of substantially identical metallic catalytic converter substrates arranged in a honeycomb pattern. Each of the catalytic converter substrates has a regular hexagonal cross section and an inlet end separated from an outlet end by six planer walls. The metallic substrates are attached in parallel to form a compound honeycomb cross section with an inlet side, an outlet side, and an outer border defined by a portion of the planer walls. The compound honeycomb cross section is affixed within the tube between the first mounting plate and the second mounting plate. The individual substrates are coated with an appropriate catalyst for treatment of a particular exhaust component.

Abstract: An air cleaner incorporating a plurality of filtration techniques within a rigid, gasketed frame designed to fit in conventional filter tracks. A perimeter gasket attached to the frame leaving air side provides a positive seal thereby preventing air from bypassing the frame. The frame houses, in series from the entering air side, a replaceable dry-type media filter coated on its leaving air side with a viscous substance, and a synthetic weave having a charge separation producing local electrostatic effects. The replaceable media effectively comprises two stages of filtration; dry-type media filtration, and viscous impingement filtration. Air passing through the instant filtration configuration is efficiently cleaned with little resistance.

Abstract: The invention relates to a method of treating reticulated foam with a controlled migration treatment medium to produce an improved air filter. Reticulated foam is treated with a highly viscous oil that protects the foam from hydrolytic degradation and increases efficiency of the filter without causing unacceptable air restriction of the foam. An improved air filter made from treated and untreated layers of reticulated foam is also shown.

Abstract: An apparatus and method for removing particles from refinery fluid hydrocarbon and organic streams comprising an elongated housing containing multiple layers of non-woven fabric arranged in said housing as discrete stratified layer array of filter fabric of increasing particle retentive power thus arranged in the housing in the direction of fluid flow. The fabric layer comprise thermally stable materials of different permeability which are mineral coated to provide structural, fluid compression resistance, and to which flint or talc particles are added to impact surface roughness to the fibers. A final layer of uncoated needled felt fine fabrics end caps the array. In operation the refinery fluid is passed through the filter array such that the direction of fluid flow is in the direction of increasing retentive power of the filter fabric array.

Abstract: A method of applying a wettant to an air laid, non-woven, fibrous filter web or other filter media includes the steps of atomizing the wettant into relatively small particles having a diameter equal to or less than about 1/2 of the diameter of the smallest fiber in the web or mat, and entraining the particles in a carrier air stream. The carrier air stream is forced through the batt at a face velocity substantially greater than the face velocity that the filter media sees when it is used to filter contaminant particles in use. Accordingly, dispersal of the wettant throughout the batt is assured, and migration of the particles into the effluent air stream when the batt is used in filtering is reduced or eliminated.

Abstract: A respirable particle sampling instrument passes air with a fan through a passage having first a pre-filter thereacross to collect non-respirable airborne particles and then a main filter to collect respirable particles, the pre-filter being formed by a random fibrous network having interstices of such size and distribution as to capture a major proportion of the non-respirable particles within a prescribed range of velocity for which particle capture is predominantly by inertial impaction. The pre-filter suitably comprises porous foamed plastics material, preferably in a structure of contiguous layers having successively changing pore sizes and distribution, preferably of a polyester, and preferably having an oil coating. The pre-filter will normally have a penetration function approximating the so-called Johannesburg curve.