Abstract: A coating composition substantially prevents fraying of glass fiber yarn packages. The composition is composed of an aqueous solution of a resin formed of the hydrolysis product of a copolymer of vinyl aromatic monomer and maleic anhydride, an organo silane glass fiber anchoring agent and an effective amount of a water-soluble pyrrolidone-containing polymer sufficient to form a protective film over the glass fiber.

Abstract: A method of removing boron from gases which comprises passing the gas stream in contact with solid sodium bicarbonate.

Abstract: An apparatus for fiberizing molten mineral material is disclosed. The apparatus includes a spinner to fiberize the material into fibers, a high velocity blower to attenuate the fibers, an air gap between the spinner and the high velocity blower through which ambient air is drawn and a flow controller over a portion of the air gap to redirect flow of the ambient air.

Abstract: A water resistant, devitrification resistant glass fiber consisting essentially of SiO.sub.2, Al.sub.2 O.sub.3, CaO, MgO, B.sub.2 O.sub.3, Na.sub.2 O, and F.sub.2 and/or Fe.sub.2 O.sub.3 and/or TiO.sub.2 and/or K.sub.2 O and/or SO.sub.3 in trace amounts, said glass fiber having a delta T of at least about 365.degree. F. and a durability (% fiber weight loss at 96.degree. C.) in water for 24 hours of less than about 0.9%.

Abstract: A method of making an orificed discharge wall for supplying a plurality of streams of molten glass to be attenuated into filaments is provided comprising inserting elements in apertures in a member; positioning said elements and member within a thin walled elastomeric sheath adapted to isostatically transmit pressure to said elements and member; applying isostatic pressure to the sheathed elements and member to mechanically seal the elements to the member; and fusing the mechanically sealed elements and member together to prevent the unwanted passage of molten glass between said elements and said member, said elements having an orifice to permit the passage of molten glass therethrough to establish said streams.

Abstract: The assembly includes a pultruded glass fiber reinforced resin strap each end of which is secured between a pair of plates. At each end the plates and the strap are apertured to receive a retaining rod.

Abstract: Apparatus is disclosed for introducing a gas into a porous pack the apparatus comprising gas injection means for introducing a gas into the pack, a conveyor for moving the pack into superimposed position to the gas injection means and for deflecting the gas out of the pack between the gas injection means.

Abstract: Apparatus and method for distributing particulate material substantially evenly over a square receiving area are disclosed, the apparatus comprising a rotatable trough having a discharge slot positioned along its length.

Abstract: A feeder for the production of glass filaments is provided with a mechanical valve means to render the operation dripless or non-dripless, as desired. Preferably, the feeder is rendered non-dripless when the restart of filament formation from idle orifices is desired.

Abstract: A method and apparatus for making non-circular mineral fibers, and the fibers produced thereby, comprises flowing a stream from a body of molten mineral material through a non-circular orifice, and quenching the mineral material in the stream to form a mineral fiber having a non-circular cross-section.

Abstract: A method for making mineral fibers comprising discharging molten glass as primary molten streams from orifices and joining at least one primary stream to an adjacent primary stream to form a coalesced stream of different cross-sectional shape from that of the orifices, and hardening the coalesced stream into a glass fiber having a cross-sectional shape similar to the shape of the coalesced stream.

Abstract: Heat transfer media is heated by passing the media downwardly through a chamber, introducing hot gases near the top of the chamber, introducing hot gases near the bottom of the chamber, and exhausting hot gases from a hot gas outlet positioned near the middle of the chamber.

Abstract: This invention proposes a method of controlling the melting rate of a glass furnace to obtain substantially constant molten glass throughput. The furnace contains a pool of molten glass and a relatively thin layer of unmelted glass batch on the surface of the pool. The furnace contents are weighed, and the batch feed is controlled by the measured weight. In essence, the melting rate is determined by the thickness of the lighter, thermally insulated batch layer, since a thinner batch layer results in more heat loss through the batch and less batch melted by the cooler molten glass. Thus, a decrease in weight indicates more molten glass withdrawal and a lower melting rate, and batch is added to increase the molten glass temperature and to melt more glass batch. In the preferred embodiment, the furnace is electrically heated at a constant rate, and only the rate of batch feed is controlled to maintain substantially constant glass throughput.

Abstract: A wall construction comprising a plurality of horizontally spaced vertically extending studs, an insulation board mounted on an outer side of the studs, a scrim adhered to an outer side of the board, fastening means mechanically securing the board and scrim to the studs, and a coat of cementitious material covering the board, scrim, and fastening means, at least one of the studs being disposed between opposite vertical edge portions of the board, and the scrim having a greater number of vertically extending strands per inch of width in the vicinity of said at least one stud than in areas between the studs.

Abstract: A cure stable polyester emulsion for use in an aqueous size composition has been developed for glass fibers produced for molded products having appearance surfaces known as Class A surfaces. The size contains a cure stable polyester emulsion and a static insensitive lubricant system. The resulting coated glass fibers are especially useful in improving processability and product uniformity of SMC applications.

Abstract: Melt spinnable liquid crystal aromatic polyesters which are optically anisotropic in the melt phase are provided. The polyester is a poly [(1-phenylethylphenylene)/chlorophenylene terephthalate].

Abstract: Melt spinnable liquid crystal aromatic polyesters which are optically anisotropic in the melt phase are provided. The polyester is a poly [(1-phenylethyl)-phenylene/phenylene terephthalate].

Abstract: A feeder for the production of glass filaments is provided with dripless and non-dripless fields of stream defining orifices to, in part, have the advantages of dripless as well as non-dripless type feeders.

Abstract: A method for measuring binder characteristics in a mat of binder coated mineral fibers, the binder having a first cure indicator constituent, the amount of which changes at a first rate as the binder is cured, and a second cure indicator constituent, the amount of which changes at a second rate, different from the first rate, as the binder is cured, comprising radiating the mat and binder with first, second, third and fourth wavelengths of electromagnetic radiation, the first wavelength being absorbed by the binder including the first cure indicator constituent, the second wavelength being a reference for the first wavelength and being not absorbed by the binder or the cure indicator constituents, the third wavelength being absorbed by the binder including the second cure indicator constituent, and the fourth wavelength being a reference for the third wavelength and being not absorbed by the binder or the cure indicator constituents, and further sensing the amount of energy of the first, second, third and fou

Abstract: A method and apparatus for processing compressible insulation material of mineral fibers in which a folding shoe guides the insulation material from a strip condition into a cylindrical condition and further including initially compressing the portion of the strip material along the centerline thereof, subsequently compressing the portions of the strip material intermediate the center line and the side edges of the strip material, and, finally, compressing the side edge portions of the strip material.