Abstract: A filter including a fibrous filter medium mat, having an upstream dirty fluid inlet and a downstream clean fluid outlet, with a majority of the filter medium fibers oriented in a substantially unrestrained, aligned direction so as to be aligned with the direction of fluid stream flow, the fibrous filter medium mat combinable in a preselected manner with filter media of randomly dispersed fibers.

Abstract: Provided is a filter favorably used in high-temperature long-term exposure conditions, for example, in coal boilers, cupola furnaces for steel and cast iron production, cement kilns, aggregate drying furnaces, furnaces for non-iron metals, etc. For the filter, provided are a filter material comprising a web or a web and its support, which contains a polycyanoaryl ether in an amount of not smaller than 5% by weight relative to the weight of the filter material; and a filter material comprising a substrate of polycyanoaryl ether fibers or of polycyanoaryl ether fibers and other organic fibers, and a web of at least one type of fibers selected from polycyanoaryl ether fibers and other organic fibers, wherein the amount of the polycyanoaryl ether fibers is not smaller than 5% by weight relative to the total weight of the substrate and the web.

Abstract: Ethylene/carboxylic acid ionomers may be made, using a meltspun, and particularly meitblown process, into microfibers and thence to filter webs which are efficient gas filters for removing particles having a diameter of from 0.5 to 20 microns from a gas. The webs are effective without a deliberate specific post-charging operation during production. A deliberate post-charging operation can also be carried out to result in further efficiency.

Abstract: An oil mist separating element composed of a web of material formed of threads, yarns, wires or a combination thereof, the material of the oil mist separating element being formed at least partially, or entirely, of a mesh, raschel, knit or woven fabric.

Abstract: A composite nonwoven fabric suitable for undergoing pleating to form filtration media includes two nonwoven fabric layers which are adhesively bonded. One layer is an air permeable nonwoven web of continuous filaments. A high loft nonwoven batt of staple fibers is laminated to the nonwoven web layer. The nonwoven batt has a gradient fiber density and includes a first layer of relatively low denier fibers and a second layer of relatively higher denier fibers.

Abstract: The present invention is an air filter assembly which includes a frame having a filter mounted therein. The filter is constructed of woven microfilament strands having a cross-sectional height of at most 30 microns, the strands being spaced apart by at most 20 microns. The filter medium is single-ply so as to be non-entraining. Each strand preferably has a smooth outer surface for repelling particles smaller than the size of the openings in the filter. The frame may laterally adjustable, if desired. In an alternative embodiment, the filter includes a single-ply sheet of a filtering material having openings cut therein. The filtering material preferably has a smooth outer surface facing the air-flow for preventing the particles from clogging the filter. The openings may be made in the filtering material by processes such as laser cutting, x-ray lithography, chemical etching, or by stretching a microporous sheet.

Abstract: A fluid filter for a solenoid which includes a flexible filter element and two plastic tips for installation in an annular groove. The plastic tips are arcuate shaped to fit tightly against the outside diameter of the annular groove when the flexible filter element is wrapped around the annular groove during installation and the tips are bonded together to secure the filter to the groove.

Abstract: A flexible tubular filtering material possessing a braided cord structure wherein a number of yarns are intercrossed with each other in the right and the left directions and braided into a cylindrical form, or said material additionally with the fiber assembly layer installed around the cylindrical periphery of the filtering material, which is free of bending obstruction and shows little textural change in the outer and inner peripheries of the curved portion against bend formation, and which possesses high particle removal efficiency and long service life; and a flexible filter element comprising this filtering material in a flexible casing.They are useful for liquid filters, specifically as a fuel filter for automobiles.

Abstract: A method of manufacturing a filter resistant to high temperatures and mechanical stress, includes forming a fiber secured to a suitable framework wherein a double-sided knitted fabric is knitted from a fiber resistant to high temperatures, e.g. poly(m-phenyleneisopthalamide) fiber, on a knitting machine with two rows of needles, and a reinforcing fiber resistant to high temperatures, e.g. aromatic polyamide fiber is fed on top of the fabric, and on top of this a new double-sided fabric, wherein the reinforcing fiber remains in the channels formed by the transverse loops of the knitted structure, after which a piece of this fiber structure is secured to a suitable frame.

Abstract: A filter assembly (10) for removing particulate matter from air forced therethrough comprises two pairs of oppositely charged woven electrostatic filtering material. Each pair of electrostatic filtering material comprises a positively charged and a negatively charged layer (22, 24, 28 and 30). An open cell foam layer (26) is disposed between the two pairs. Metal grids (20,32) enclose the filtering elements.

Abstract: A vacuum cleaner uses a special self-cleaning filter arrangement including an initial fabric filter having a relatively large mesh size with a broad open mesh ratio of 5 to 15% and a total opening area of 5 to 45 times the cross section of the inlet, which inlet faces away from the filter. The initial filter is preferably backed up by secondary filters and is arranged so that dirt collected on the filter is periodically sloughed off and dropped into a receptacle after building to a critical level.

Abstract: A dehumidifier device is provided for absorbing water vapor from ambient air. The device is comprised of a container constructed of fabric woven from multifilament yarns of fiberglass, and confining granular desiccant material such as silica gel having a visibly distinctive moisture indicator. The fabric is of a critically selected construction that permits visual observation of the confined granules through the fabric while effectively retaining the granules. The device is capable of repeated cycles of absorption of moisture and thermally induced desorption.

Abstract: A sealed scroll compressor comprises a scroll compressor section, an electric motor, a sealed container, an oil storage, a fixed and orbiting scroll members, and a wire mesh member for improvement of oil separation in refrigerant gas. A shell portion of said sealed container is lined annularly with the wire mesh member and the gas containing oil is adapted to flow downwardly along the wire mesh member. When the gas flows downwardly, the oil sticks to the wire mesh member and is separated from the gas. The oil collected on the wire mesh member drops down into the oil storage. The gas from which the oil is separated is, after that, discharged out of the compressor.

Abstract: A vinylidene fluoride resin having an inherent viscosity of 0.8 to 1.4 dl/g in dimethylformamide is melt-extruded and cooled and solidified under draft-stretching to form a film having a birefringence of 25.times.10.sup.-3 or larger. The film is heat-treated at 80.degree.-120.degree. C. and split into a split yarn. The split yarn has a Young's modulus even higher than that of the polypropylene split yarn and, when provided with a surface charge above the glass transition temperature, retains the charge semi-permanently. The charged split yarn is particularly suitable for forming a gas filter.

Abstract: A dust-proof fabric having an excellent dust-collecting efficiency and dust-preventing property including a plurality of filament yarns having a thickness of 20 to 400 denier and consisting of a plurality of individual filaments having a denier of 3.5 or less. The fabric has a number of pores formed therein and exhibits an air permeability of 0.3 to 10 ml/cm.sup.2 /sec. In the fabric, the proportion of the integrated volume of pores having a size of 43 .mu.m or more to the entire integrated volume of all the pores in the fabric is 40% or less.

Abstract: A filter assembly for removing particulate matter from high temperature gas streams is disclosed, said filter assembly comprising:a rigid, tubular frame or cage made of high temperature stable material, having a closed lower end, or optionally an open lower end, and adapted to be connected to a gas compartment at its open upper end, the cage having openings to provide at least 40 percent open area on its lateral surface, with each opening having an area of less then 125 square millimeters,a filter element surrounding said cage and comprising a conformable, fabric tape of woven ceramic fibers tightly spiral-wound in an over-lapped wrap about the lateral surface of the cage, said filter element being a gas permeable, rigid, seamless, tubular structure having at least one open end, anda clamping means for securing the filter element to the lower end of the cage, the clamping means optionally forming an end cap for the lower end of the filter.

Abstract: Hot gas filter for separating solid particles carried along in high temperature or waste gases having a filter casing made of heat-resistant brickwork, in which there is provided at least one oblong filter cell one end of which ends in a hot gas supply duct whereas the other end is tightly closed by a removable cover. The walls of the filter cell are at least partly made of perforated bricks, through which the hot gas entering the filter cell may overflow to a treated gas discharge duct. The filter cell is lined over the whole length thereof with a replaceable filter hose of heat resistant fabric or tissue, preferably non-woven ceramic fiber fabric or a fabric of ytrium-oxide stabilized zircon-oxide fibers.

Abstract: A dual filter system for heaters and airconditioners comprising releaseably securable throwaway secondary filter secured to a disposeable or permanent primary filter.

Abstract: The invention relates to a tubular filter element for use in an ultra filtration plant. The element is in the form of a tube of woven fabric which is napped on its internal surface. A cellulose filter aid is deposited, on the nap and the resulting filter element has a high collection efficiency and low filter drag making it particularly suitable for use in an air recirculation plant. The air is drawn from a working area and passed through a conventional primary collection unit and then through an ultra filtration unit containing an array of the filter elements. It is then sufficiently clean to be passed back to the working area, preferably through a HEPA filter, and this results in a substantial saving in heat energy which would otherwise be wasted.