Abstract: A method and apparatus for sealing a hole in the inner wall of a double wall heat exchanger in which cover means is positioned in biased relationship to the hole and a frame positioned in the opening through which the cover means is inserted against the hole.

Abstract: Apparatus for rotating a spinner for centrifuging mineral fibers for molten mineral material comprises a quill upon which the spinner is mounted, a pin for engaging the quill and applying torque thereto, a pin carrier for holding the pin and applying rotational force thereto, a pin carrier housing for urging the pin carrier, and thus the pin, upwardly with respect to the quill, and a spindle, separate from the pin carrier housing, for rotating the pin carrier.

Abstract: A woven or non-woven mat comprising natural or synthetic fibers bonded together with the residue formed by removing water from an aqueous composition comprising a thermoplastic emulsion and a melamine formaldehyde resin forms an underlay for asphalt paving for road surfaces.

Abstract: The disclosure embraces a method of and apparatus for processing fibers or filaments of glass or other fiber-forming material into a roving and winding the roving into a package. The disclosure includes a method and apparatus wherein a comb-like guide or shoe is engaged by a plurality of separated strands, the guide arranged to be moved downwardly from an uppermost position to a lowermost position toward a rotatable and reciprocable spiral wire traverse means, the traverse means converging the strands into a roving wound into a package. The strand guide or shoe is reciprocated laterally during a winding operation, the reciprocations of the strand guide being substantially in synchronism with the reciprocations of the spiral wire traverse means during package winding operations.

Abstract: The disclosure embraces a method of and apparatus for transferring dual strands or bundles of filamentary material from a rotating single supply package or creel package onto bobbins mounted on first and second rotating spindles, the method and apparatus involving the use of a control unit, stop motion assembly or knockoff device for each strand or bundle, the control units, stop motion assemblies or knockoff devices having a mechanical interconnection established whenever one of the strands or bundles breaks or sustains loss of tension whereby the rotation of the supply package and the rotation of the two spindles mounting strand or bundle receiving bobbins are interrupted.

Abstract: Scraper apparatus, preferably for pelletizers is disclosed, the scraper being adapted with a plurality of individual blades rotatable into contact with the walls of the pelletizer and removable after excessive wear.

Abstract: A glass wool blanket is formed directly on glass fiber scrim for use in flexible insulated air duct with any kind of outer jacket. The scrim-faced wool passes the flame-penetration test of Underwriter's Laboratories Standard UL 181 regardless of the outer jacket material used.

Abstract: This invention pertains to a method to permit the molding of a plurality of plies of polymeric compositions into an integral molded object having a minimum number of internal flaws and, therefore, improved properties. The plies are positioned in contiguous relationship, and the initiation of the polymerization reactions is controlled by selecting catalyst systems which substantially simultaneously initiate polymerization in each of the plies to prevent the development of curing seams at the points of contact between the plies.

Abstract: Rigid cellular hydrous calcium silicate thermal insulating product of low density can be made by aerating an aqueous slurry containing reactive calcareous and siliceous materials, preferably in conjunction with the incorporation of a foaming agent in the slurry, and then indurating the aerated slurry by the application of heat and pressure.

Abstract: An increase in fine particle metal production is realized when the descending molten metal stream is caused to impinge upon one of two descending fluid streams at a locus offset from the locus of intersection of the two descending fluid streams.

Abstract: A tubular jacket of flexible plastic film is telescoped over one of two spaced coaxial mandrels extending toward each other, duct end collars are secured respectively on the mandrels, opposite ends of a flexible helically reinforced core are strapped respectively to the collars, a flexible insulation blanket is wrapped around the core and taped adjacent opposite ends, the jacket is pulled over the blanket, the collars are released, and the collared duct is removed from the mandrels.

Abstract: An apparatus for simultaneously winding two strands of glass filaments from a filament forming bushing on a single winding collet and including two package builders each with its own package size sensing means, carriage, and back-off motor whereby two different-sized packages can be properly wound in case of temperature imbalance in the bushing.

Abstract: Cocoa amine acetate and a polyamide condensate, in combination as a lubricant in a glass size, result in glass strands exhibiting less fuzz than does glass sized with a size containing either of the two components, individually.

Abstract: The method and apparatus for monitoring a process condition in a spinner mounted for rotation, the spinner having an orificed sidewall for the centrifuging of molten mineral material therethrough, comprises a sensing means mounted for rotation with the spinner for sensing a process condition, and a wireless transmitter mounted for rotation with the spinner for transmitting a signal responsive to the sensed process condition.

Abstract: A particulate dryer is disclosed in which upwardly moving hot gases contact downwardly moving particulate matter. The particulate matter is supported by rotating trays which, due to the absence of support at their outer ends at selected loci are caused to tilt downward to effect passage of the particulate matter downwardly through the dryer.

Abstract: The roof structure includes main support beams (18), auxiliary cross beams (12), hangers (20) with stub axles (32a) mounted on the cross beams (12), rollers (22) extending parallel to the cross beams (12) and each rotatably mounted on stub axles (32a) of adjacent hangers (20), insulation strips (36) strung over rollers (22) on successive cross beams (12), roof panels (14) forming a cover over the main support beams (18) and cross beams (12), and batts (44) of fibrous insulation between the roof panels (14) and the insulation strips (36).

Abstract: Method and apparatus for attenuating and collecting glass filaments are provided comprising a rotatable collet adapted to wind said strands thereon; a traversing means adapted to move the strands along the length of said collet, said traversing means having an axis of movement; guide means located adjacent said traversing means, said guide means having a plurality of spaced apart strand accommodating notches wherein at least two of the notches are contained in a reference plane that is obliquely oriented with respect to the axis of movement of said traversing means or axis of rotation said collet to facilitate the maintenance of the individuality of each of the strands being wound into said package.

Abstract: A chimney baffle is positioned against a vertical refractory wall extending from a channel through which hot glass is flowing to reduce deterioration of the refractory of the vertical wall.

Abstract: A glass batch, and a fiberizable glass composition, comprising 2 percent B.sub.2 O.sub.3 is disclosed. The glass fibers have improved dry strength and water durability and have a surface boron concentration, in weight percent, of about 2.5.

Abstract: Backwall and sidewall panels for assembly with a bathtub in the forming of a shower enclosure are molded with integral interlockable portions respectively thereon whereby the sidewall panel can be assembled with the backwall panel to provide firm engagement therebetween by the interengaging of the interlockable portions with each other.