Abstract: A glass size composition comprising a polyester, the polyester comprising the reaction product of (1) a mixture of acids consisting essentially of isophthalic acid and azelaic acid and, (2) a mixture consisting essentially of trimethylpentanediol and bisphenol A is disclosed.

Abstract: The disclosure embraces method and apparatus for producing stream feeders for supply of streams of heat-softenable fiber forming material such as glass for attenuation into fibers. The invention sets forth an improved method for securing preformed, flanged tubular members to an orificed plate by utilization of an electron beam welding device.

Abstract: A pollution control system for reducing the presence of fine aerosol particles in stack gases from the manufacture of glass fiber wool-type products. After larger particles are removed from the forming fan gas, the gas is fed into a centrifugal fan and massive quantities of water are injected into the fan intake. The aerosol particles are agglomerated by impact with the airborne water droplets and the wet surfaces of the fan. The larger, coalesced or agglomerated particles are more readily susceptible to inertia-type separation from the air by either the action of the fan or in a later separation operation.

Abstract: The present invention embraces a method and apparatus for simultaneously winding two linear elements into strand packages.

Abstract: This invention relates to apparatus for collecting linear material defining a collector rotatable about a fixed axis onto which the linear material can be wound as a package. Located proximate the collector is a traverse guide for positioning the linear material on the collector. The traverse guide is urged towards the package at a substantially uniform pressure throughout the formation of the package by biasing means. The movement of the traverse guide is controlled by clutch means during formation of the package so that the traverse guide is restricted from moving towards the package.

Abstract: A method and system for controlling the deposition of fibers issuing from a fiberizing unit in a veil which displaces portions of the veil with fluid streams, e.g., air blasts. A moving continuous collector screen receives the veil to form a mat of fibers. Speed of the collector is coordinated with the rate of deposition in determining the amount of fiber deposited per unit length of product. Air streams directed transversely of the direction of motion of the collector displace portions of the veil toward the collector edges. Absence of the air blast permits deposition of the veil to be concentrated on the collector center region. Application of gas streams in pulses cause splitting of the veil into sections which are displaced laterally across the collector with pulse frequency generally being increased with collector speed, and center to edge weight distribution of product being coordinated with the pulse interval length and the interval between pulses.

Abstract: A method and apparatus for producing a composite bulked or texturized yarn having a generally uniformly bulked core yarn component of continuous filaments having groups of core yarn filaments extending outwardly from the core component in undulatory waves having substantially less filament density than the core component, and having a varyingly bulked effect yarn component of continuous filaments having groups of effect yarn filaments extending outwardly from the effect yarn component in undulatory waves such that the groups of effect yarn filaments form slubs at regions along the length of the composite yarn. The filaments forming the slubs return to each respective nucleus portion of the segment on each side of the slub. Selected filaments within the waves have different lengths so that the waves are comprised of filaments based at various distances from the core and are spaced from one another within the wave.

Abstract: The present invention embraces method and apparatus for winding a linear element into a package.

Abstract: It has been discovered that refractories at their elevated use temperatures have electrical properties unique to semi-conductors. The electrical conductivity of refractories is changed by altering the defects in the metallic or nonmetallic ions of the refractory lattice, and the purity is controlled to prevent fluxing from occurring at the grain boundaries. The discovery makes possible either the increase or decrease in electrical conductivity of any semi-conducting refractory, since the theory is applicable to both materials wherein the defects occur in the metal ions of the refractory lattice and also to materials wherein the defects occur in the nonmetallic ions of the refractory lattice.

Abstract: A process of making a mat of glass fibers wherein a strand of glass fibers frictionally engages the surface of a revolving cylinder from which the strand is tangentially discharged onto a moving conveyor. The strand is caused to be randomly looped upon the conveyor by alternate blasts of air which laterally impinge upon the strand to throw the strand in a looped fashion from side to side across the conveyor. More efficient and sustained operation in the processing of glass fiber mat is obtained by wetting the individual filaments of glass with a water solution comprising organosilane, nonionic lubricants, and acidic salt, which water solution eliminates wheel wrap of the glass fiber strand around the revolving cylinder without adversely affecting other desirable properties of the strand and the mat.

Abstract: The winding apparatus includes a turret periodically indexible through half a revolution by a worm and worm gear mechanism and having a pair of winding collets rotatably mounted thereon and driven respectively by a pair of stationarily mounted variable-speed electric motors which are also selectively drivingly connected to a strand oscillator shaft respectively by a pair of one-way clutches mounted on a common shaft.

Abstract: A size and dispersion system for, and a method for, the production of glass mats, the size comprising a methyl trimethoxysilane and a malto-dextrin, the dispersion system comprising a nonionic guar gum and an isostearic amide.

Abstract: Method and apparatus for advancing continuous glass strand during times the strand is not being collected into a package by a winder. A pair of cooperating rolls having a plurality of helical teeth are rotated to advance the strand therebetween.

Abstract: Composite panels each having a casing and insulating material in the casing are mounted in a covering layer over the inside of a supporting structure by mechanical fastening means. Joint cover members including insulating material and outer facing material are disposed in the spaces between casings of adjacent composite panels. The outer facing material is sealed to front panel portions of the casings to form a primary barrier for cryogenic liquids therewith. An additional secondary barrier may be provided by using composite panels with interior panels in the casings sealed to inner sides thereof and dividing the casings into front and rear compartments, each having insulation therein, and using front and rear joint cover members, the outer facing material of the rear joint cover members being sealed to outer sides of the casings of adjacent composite panels to form a secondary barrier with the interior panels of the composite panels.

Abstract: This invention proposes a method for eliminating "sink" in molded glass fiber reinforced panels for automotive and other uses. Such panels are normally formed with integrally molded reinforcement shapes (ribs) and fastening locations (bosses), and a slight depression or "sink" occurs in the exposed panel surface over the location of the ribs and bosses. The present invention proposes the elimination of this sink by utilizing innovative material and design techniques that compliment one another.The material approach makes use of dual reinforcements; normal chopped glass fibers reinforcement (1 inch or less in length) in combination with a long fiber reinforcement (2 inches or more in length) and preferably a continuous fiber reinforcement. The long fiber reinforcement is placed such that it is oriented in the panel to closely underlie the exposed panel surface.

Abstract: The disclosure embraces a method of and apparatus for distributing linear groups of fibers onto a moving collector which include engaging and advancing groups of fibers by rotating pull wheels, disengaging the groups of fibers from the pull wheels by oscillating and rotating members associated with the pull wheels, oscillating the members by cam-actuated systems of linkage to control disengagement of the groups of fibers from the pull wheels and effect distribution of the groups of fibers on the collector, and applying pressure on the linkage systems opposing the operation of the systems to substantially eliminate lost motion in the linkage systems and thereby promote oscillatory motion accuracy of the fiber disengaging members whereby the collected body of fibers is endowed with substantially uniform characteristics.

Abstract: The present invention embraces a method and apparatus for collecting linear material on wound packages including the steps of supplying linear material, rotating a first collet having a package collection region and a temporary package collection region, winding the linear material on the collection region of the first collet, rotating a second collet having a package collection region and a temporary collection region the second collet including a fixed member for engaging linear material during transfer of such material from the first to the second collet, laterally moving the advancing material along the first collet from the package collection region to the temporary collection region, contacting the linear material advancing to the first collet with the second rotating collet in the temporary collection region to engage the linear material on the member to move the linear material with it and thereby to begin collection of the material in the temporary collection region of the second collet to sever the

Abstract: A die for impregnating yarn is provided with a die insert having a minimum inside diameter. An inlet duct opening into the die has walls with length L, the walls sloping at an angle within the range of from about 5 degrees to about 25 degrees. The length of the inlet duct is within the range of from about 10 to about 25 times the minimum inside diameter of the die insert. The maximum diameter of the inlet duct is within the range of from about 15 to about 35 times the minimum inside diameter of the die insert.