Abstract: A method of manufacturing a fibrous, nonwoven, flow filter tube and the filter tube so prepared, which method comprises forming a filter tube from an aqueous slurry containing an admixture of both low-melting-point binder and high-melting-point filter fibers, and, thereafter, heating the filter tube to a temperature greater than the temperature of the low-melting-point fibers and less than the temperature of the high-melting-point fibers, to effect melting of the low-melting-point fibers, the molten material of the low-melting point fibers forming at the crossover points of the high-melting-point fibers to act as a bonding agent, thereby preparing a nonwoven, self-supporting, fibrous filter tube composed of the filter fibers.

Abstract: An apparatus for and a method of removal of particulate material and boiler-feed additives from pressurized, saturated steam, which apparatus includes a composite cartridge in which particulate matter is removed by a filter tube and boiler-feed additives are removed by contacting the filtered steam with a bed of a hydrogen-form, strong-acid, ion-exchange resin, and saturated, pressurized steam substantially free of particulate matter and volatile, alkaline, boiler-feed additives are recovered for use, for example, in food-preparation and sterilization purposes.

Abstract: A method of separating an oil-and-water phase from an oil-and-water emulsion, which method comprises passing the emulsion first through a wall of a prefilter composed first of fibres having an energy of adhesion of from 2 to 50 ergs/cm.sup.2 to form larger oil droplets, and, thereafter, passing the larger oil droplets and the emulsion through adjacent layers of glass fibres, to separate the oil phase from the oil-and-water emulsion, and then collecting and removing the oil phase, while permitting the passage of an essentially oil-free water phase of the emulsion from the prefilter.

Abstract: A test kit and method for determining in a semiquantitative manner the amount of oil mist in a compressed-air stream, which method comprises bleeding a small sample from the compressed-air stream containing oil mist whose concentration is to be determined; directly impinging the compressed-air stream so bled for a defined time period through a defined orifice onto the surface of a coated plate containing an ultraviolet radiation indicator to capture the oil-mist particles in the compressed-air stream, thereafter comparing the test plate with a standard plate of known concentration of oil mist under ultraviolet radiation to determine the degree of flourescent quenching as an indication of the amount of oil mist in the compressed-air stream.

Abstract: A glass-fiber filter tube and process of preparing the filter tube, which filter tube comprises a plurality of randomly disposed, fine glass fibers bonded, at the junction of the fibers, with a fused thermoplastic fluorocarbon resin, which filter tube may also include a reinforcing support scrim sheet incorporated integrally therein.

Abstract: A glass-fiber filter tube and process of preparing the filter tube, which filter tube comprises a plurality of randomly disposed, fine glass fibers bonded, at the junction of the fibers, with a fused thermoplastic fluorocarbon resin, which filter tube may also include a reinforcing support scrim sheet incorporated integrally therein.

Abstract: A porous tubular element of uniform density and porosity is formed by uniformly depositing binder and crushable fibers selected from the group consisting essentially of polycrystalline, alumina, zirconia, aluminum silicate and potassium polytitanate fibers from an aqueous dispersion onto a cylindrical mold. The tubular element is then compressed with sufficient pressure to crush and rearrange the fibers to obtain uniform density and porosity.

Abstract: A process of preparing an inside-to-outside flow filter tube, which process comprises dispersing a plurality of glass fibers in water to form a water slurry of the fibers, the glass fibers having a diameter range of from about 0.001 to 10 microns; forming a filter tube comprising a wet mat of the glass fibers from the water slurry on a cylidrical mandrel; during the forming of the wet mat of fibers into a filter tube, incorporating an open-scrim, reinforcing sheet material within the internal wall thickness of the wet mat of fibers forming the filter tube, the sheet material extending generally the length of the filter tube and at least about 11/2 revolutions of the filter tube diameter; drying the filter tube containing the scrim sheet material within the filter tube wall; bonding the dried filter tube with a bonding agent at the junction of the glass fiber crossover points and with and through the scrim sheet material; and recovering an integral filter tube having a high burst strength.

Abstract: An improved inside-to-outside flow filter tube and method of manufacturing the tube, which filter tube comprises: a plurality of nonwoven fibers having interstices therebetween to define the porosity of the filter tube, the tube containing a binding agent at the junction of the fiber crossovers to provide a self-supporting structure of a defined wall thickness and filter porosity; and an open scrim reinforcing sheet material within the wall of the filter tube extending generally the length of the tube and at least one overlapping revolution about the tube diameter, the fibers of the filter tube bonded integrally through the open scrim material, thereby permitting the use of the filter tube in applications requiring inside-to-outside fluid flow without the necessity for an external peripheral support.

Abstract: A disposable filter unit which comprises a self-gasketing, self-supporting, bonded, glass-fiber filter tube sealed in a housing with two similar plastic molded end units, with one peripheral edge of the tube compressed against the interior face surface of one end unit, and the other peripheral edge against a solid surface disc element within the housing.

Abstract: A method of manufacturing an inside-to-outside flow filter tube and the filter tube so manufactured which comprises: providing a porous tube comprising a wet mat of randomly disposed glass fibers; positioning an external reinforcing sleeve material concentrically about the porous tube; applying an outward force to the porous tube to expand the external diameter of the porous tube into intimate contact with the sleeve material; and drying the tube and bonding the fibers of the tube into an integrally supported filter tube.

Abstract: A compressed gas dryer and a method of drying compressed gas, particularly air, which method comprises: intimately contacting a high-pressure, wet, compressed gas stream having a high relative humidity with a hygroscopic liquid absorbent miscible with the water to be removed, and separating the liquid absorbent and compressed gas to provide a wet liquid-absorbent mixture containing the water removed from the gas and a dry compressed gas stream; reducing the liquid-absorbent mixture to a lower pressure than the high pressure of the wet compressed gas stream; intimately contacting the liquid-absorbent mixture with a portion of the dry compressed gas stream at the lower pressure and separating the liquid absorbent from the gas stream to provide a dry liquid absorbent and a lower-pressure gas stream containing the water removed from the liquid-absorbent mixture; recycling the dry liquid absorbent for use in the contacting of the wet compressed gas stream; removing the wet lower pressure gas stream at the lower pr

Abstract: A filter tube, which filter tube comprises a mass of interrelated nonwoven glass fibers, the fibers having a diameter of from about 0.001 to about 10 microns, the fibers bonded at the junctions of the fiber crossovers with a hardened silicone resin bonding agent, the fibers interrelated to form a semirigid mass of desired porosity suitable for use as a filter for gases or liquids.

Abstract: A filter tube, which filter tube comprises a mass of interrelated nonwoven glass fibers, the fibers having a diameter of from about 0.001 to about 10 microns, the fibers bonded at the junctions of the fiber crossovers with a hardened silicone resin bonding agent, the fibers interrelated to form a semirigid mass of desired porosity suitable for use as a filter for gases or liquids.

Abstract: An improved filter tube holder and a filter assembly in which such holder is used, which holder is adapted to secure a filter tube about a passageway in the mounting or sealing plate of the assembly, and which holder comprises: a closed end cap element disposed on one side of a mounting plate; a mounting bar strip element disposed on the opposite side of the mounting plate; first and second arched strip elements at one and the other end of a tie rod; a end cap element with an opening at the opposite end from the disc element on the one side of the mounting plate; the closed end cap element and the open end cap element adapted to secure in a sealing manner a filter tube therebetween, the tie rod adapted to pass through the passageway and the filter tube; means to secure the first and second strip elements to the tie rod; and a means to move the closed cap element and/or the mounting bar strip element toward each other to secure the filter tube therebetween in a fluid-tight manner about the passageway in the mo

Abstract: .[.A porous support core is prepared from a synthetic polymeric material, which support core is adapted for use with disposable semirigid filter tubes, which core comprises a plurality of individual elements arranged in a stacked interlocking relationship, the elements so structured to form an axial passageway in the stacke elements and flow passages in the wall of the core so formed. The individual disc elements are characterized by a central aperture to form an axial passageway, projecting partitions on one surface to form the flow passage and hook elements on the opposite surface to interlock individual disc elements..]..Iadd.