Abstract: The mandrel includes a generally cylindrical but tapered outer molding surface for forming a sidewall portion of a tank from thermosetting resin and reinforcing material deposited thereon and a tank bottom mold for forming a bottom portion of the tank integrally with the sidewall portion. The tank bottom mold is shiftable to strip a completed tank from the tapered molding surface.

Abstract: Two acoustical wall panels are secured together back-to-back to form an acoustical wall baffle installable perpendicularly to a wall of an office space in abutting relationship to the wall, ceiling, and floor. Each of the wall panels includes a fibrous glass board mounted in an extruded aluminum frame and covered on the front and edges with a decorative fabric. Each frame includes a rear mounting foot strip for spacing a wall panel from a wall and enabling the wall panel to be hung by the top frame member on concealed brackets, and a rear groove for anchoring the fabric covering by a rubber or plastic cord. The two wall panels are clipped together at the mounting foot strips of the frames by generally U-shaped metal or plastic strips. On the exposed vertical front edge of the wall baffle, a decorative trim strip is inserted between the two wall panels at the fabric anchoring grooves. The wall baffles are mounted by sliding them onto T-shaped mounting strips adhered to the ceiling and floor.

Abstract: Fabric restraining cables are anchored at opposite ends to a concrete ring of a roof structure. Each cable has a plurality of bearing plates spaced longitudinally therealong and secured to the upper portion thereof by U-bolts. Clamp mounting base plates also secured at one end by the U-bolts span the spaces between pairs of the bearing plates. Each base plate has a pair of lower clamp plates secured respectively along opposite edge portions thereof. Each lower clamp plate has an upper clamp plate secured thereto and clamping a beaded edge portion of a fabric panel along with upper and lower gaskets therefor. In several embodiments, each upper gasket is extended transversely outwardly from the cable, looped back over the respective row of upper clamp plates, and releasably joined to the opposite extended and looped back upper gasket to provide a joint cover between the opposite fabric panels.

Abstract: The pipe coupling includes a hollow cylindrical body and pipe registering means projecting radially inward therefrom centrally thereof. The body has a pair of inner annular grooves respectively adjacent opposite ends for the reception of sealing rings. Both the body and the pipe registering means are formed of glass fiber reinforced thermosetting resin and each contains glass filament windings. A plastic film strip between the body and the pipe registering means maintains them separate as the resin of both is cured. Thereafter, any cracking of the pipe registering means will leave the body intact and a good pipe joint will be maintained.

Abstract: A pipe testing machine wherein clamping pressure on the ends of a plastic pipe being tested under internal water pressure is maintained proportional to the internal pressure so as not to crush the ends of the pipe.

Abstract: Generally rectangular paperboard frame blanks are fed separately into a horizontal position from a stack at one end of a first leg portion of an L-shaped assembly line, and air filter mats are fed respectively to the frame blanks. Each edge portion of a frame blank is scored to provide three spaced parallel fold lines. As each frame blank with an air filter mat is conveyed along the assembly line, glue is applied along two spaced parallel glue lines on each of a first pair of opposite edge portions and the edge portions are doubly folded. Then the blank and mat are shifted at right angles and conveyed along the second leg portion of the L-shaped assembly line where the gluing and folding operations are repeated for the second pair of opposite edge portions.

Abstract: A ceiling baffle includes a glass cloth faced fibrous glass board, grooved and folded to provide a double thickness of board. End caps for the folded board are each provided with blade portions extending between the two thicknesses of board and with a hole in an upper wall portion for receiving a barb portion of a suspension clip attachable to an inverted T-bar of a ceiling grid system for mounting ceiling panels.

Abstract: A fibrous glass board is longitudinally grooved on one side adjacent the center for folding. The folded board is provided with a pair of plastic end caps respectively on opposite ends. The exposed surfaces of the folded board are provided with a decorative facing material, preferably glass cloth. Means are provided for suspending the completed baffle by the end caps from a gridwork of inverted T-bars.

Abstract: A pair of gear-driven hollow cutting cylinders, each perforated with square holes to provide a grid of exterior cutting edges extending circumferentially and longitudinally of the cylinder, breaks a glass wool mat fed therebetween into small columns which are pneumatically conveyed from the inside of the cylinders to a conventional bagging machine.

Abstract: Apparatus for molding rigid foam components of semicircular cross section suitable for insulating pipes and the like. A female molding component is formed of sheet metal material supported by a plurality of spaced, rigid crossmembers. This female component supports a top panel, the underside of which, in turn, supports a male mold component the semicylindrical surface of which is formed of sheet metal material which is supported by a plurality of spaced, semicircular rigid support members. When the mold is charged with an expansible foam, the pressure thereof serves to maintain the integrity of the mold profile. The design of the mold permits its fabrication utilizing relatively inexpensive material thus permitting the formation of rigid insulative foam segments at desirable unit cost levels.

Abstract: An assembly for pivotally connecting both the roof fabric and the restraining cables of an air-supported roof for pivotal movement about a common axis at a supporting structure such as a compression ring. A frame for attachment of the fabric is mounted co-pivotally with a cable attachment member and provides a continuous coupling of the roof fabric around the cable connection to avoid stress concentrations and the like. A flexible boot is provided for covering the connector assembly.

Abstract: Various pipe wall constructions comprising thermosetting resin, randomly disposed chopped glass fibers, sand, circumferentially extending continuous glass filaments, and axially extending glass fibers in various percentages in structural wall portions thereof, and having various protective inner liner and outer wall portions.

Abstract: An upper tank half provided with a manway and a lower tank half provided with a sump are each formed of thermosetting resin reinforced with chopped glass fiber strands and then secured together with several plys of resin-impregnated glass mat applied around the circumference at the joint inside and outside of the tank. Each tank half is flared adjacent the joint to provide half of a tank strengthening rib for the completed tank, which has a diameter larger than its height. Two semicircular perforated olive retaining plates are removably mounted in the upper tank half adjacent the lower end of the manway. Aboveground and underground embodiments of the tank are provided.

Abstract: Each panel includes a pair of fibrous glass boards mounted in a generally rectangular frame having an inner peripheral flange between the fibrous glass boards and having five outer peripheral grooves for receiving finish fabric anchoring beads, generally semi-circular hollow moldings having finish fabric anchoring grooves, spaced cam members interlockable with those of an adjacent panel, and shelf bracket standards. Each panel has a pair of supporting legs and base side panels with snap-on connections to the legs. An alignment plate connects adjacent legs of adjacent panels and receives a post with a stabilizing foot extending transversely to the panels.

Abstract: At each joint between pairs of adjacent foam panels, a vertical edge portion of one of the panels encases a major portion of the periphery of each of a plurality of vertically spaced cylindrical double socket members and a vertical edge portion of the other of the panels is correspondingly recessed to receive minor portions of the periphery of the socket members protruding from the one panel. Also at each joint, two vertically elongated clamps are secured respectively on opposite sides of the panels by pairs of screws, the screws of each pair being threaded respectively into opposite sockets of one of the double sockets. Opposite vertical edge portions of each clamp are vertically grooved on the side of the clamp facing the panels for respectively receiving a pair of gaskets.

Abstract: A winding form includes a mounting block, a pair of strand guide members, a pair of retaining plates, and means removably securing one of the strand guide members and one of the retaining plates to each of two opposite ends of the block.

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: Strands of resin-impregnated glass filaments are wound on a rectangular form, the resin is cured, and the resulting rectangular tube is severed to produce two hold-down lugs. Several such hold-down lugs are secured to a tank by resin-impregnated glass filaments wound therearound.

Abstract: The strand guide device includes a generally vertical base plate, a pair of vertically spaced strand guide rolls secured to the base plate in cantilever fashion, and a generally vertical strand guide plate extending from the base plate parallel to and principally adjacent the upper one of the rolls and having a contoured upper edge defining a generally U-shaped strand guide portion adapted to confine moving strands and a slot portion inclined upwardly toward the strand guide portion and adapted to hold a stationary standby strand in readiness for insertion into a group of moving strands.

Abstract: This invention relates to clamping apparatus defining a base plate having a male portion located at the first end and a female portion located at the second end. The base plate is adapted with apertures. First clamp plates are positioned longitudinally along each side of the base plate. The first clamp plates having a male portion located at the first end and a female portion located at the second end. The first clamp plate is adapted with first apertures that are in matching relationship with the apertures of the base plate and the first clamp plates have second apertures. Second clamp plates are positioned longitudinally along one side of the first clamp plates. The second clamp plates have a female portion located at the first end and a male portion located at the second. The second clamp plate is adapted with apertures in matching relationship to the second apertures of the first clamp plate.