Abstract: Lipase activity is determined in an improved process for determining the activity thereof by providing a triglyceride imbibed or absorbed in a triglyceride swellable triglyceride insoluble polymer having a predetermined particle size.

Abstract: An injection molding apparatus is used to line flanged pipe elbows. The pipe elbow is clamped by the flanges to two pivotted platens, one of which has a curved mandrel to shape the inside of the elbow lining.

Abstract: A roofing panel is provided comprising a layer of closed cell plastic foam and a layer of mortar. A reinforcing grid is disposed within the mortar layer.

Abstract: A flume mixer is provided which employs mixing cells; the mixing cells comprise first and second generally horizontally disposed flow directing elements extending between flume side walls. The mixing elements are generally in angular relationship to each other and the longitudinal axis of the flume. Each of the elements on an end projection along the longitudinal axis of the flume are asymmetric about a plane passing through the axis of the flume and extending parallel to the side walls thereof. Immediately adjacent, mixing elements or baffles have a major portion of their projected areas lying on opposite side of said plane.

Abstract: An improved cutter for hot plastic strands is provided which uses an annular die plate having a plurality of strand-extruding openings, the openings being generally coplanar. A rotating cutter is provided adjacent the die plate with cutting knives resiliently tensioned toward the face of the die, the cutter being adjustably mounted relative to the die in a manner to provide highly accurate adjustment and to minimize thermal movement of the die relative to the cutter.

Abstract: Hazardous materials such as askarels, chlorinated hydrocarbons or other ecologically undesirable liquids are disposed of by gelling the liquid within a combustible package and subsequently shipping the package to a qualified disposal site, such as an incinerator, which can incinerate halogenated hydrocarbons in an ecologically sound manner.

Abstract: Buildings are clad with facade panels by applying a generally moisture-impermeable layer to the exterior wall, applying a layer of a closed-cell water-impermeable insulating foam to the water-impermeable layer suspending facade cladding pane in spaced relationship to the foamed insulation. It is not necessary to seal or otherwise waterproof the joints between the facade cladding panels.

Abstract: A sofa bed and sofa bed mechanism are disclosed wherein a three-piece support is employed for the sleeping cushioning element which retracts to a conventional sofa configuration and expands easily to provide a bed of conventional sleeping height. The mechanism is simple, rugged and tolerant of manufacturing variations.

Abstract: Large vessels such as tanks and the like are insulated by means of a spiral generation process thereby providing rapid application of the insulation with minimal labor. The process is particularly suited for operation in confined quarters.

Abstract: Cryogenic vessels having improved insulation value are prepared by incorporating evacuated tubing within the insulation.

Abstract: A crank-operated valve is provided wherein the valving member and stem are of deflectable plastic material. Sucn an arrangement permits a corrosion resistant, easily operating valve to be prepared using an imprecise valve body.

Abstract: Insulating members such as plastic foamed boards or panels are positioned on curved surfaces by affixing the panels or planks to strap members attached to and positioned adjacent the surface to be insulated. This technique is particularly suitable for the insulation of tanks and like containers.

Abstract: A package containing a hazardous liquid is provided. The package comprises a container which is generally impermeable to a hazardous liquid contained therein, the container being subject to discharge of its contents when subjected to impact. The container is disposed within a first jacket of a liquid permeable material of sufficient strength to contain fragments of the container on rupture thereof. A second jacket is provided over first jacket, the second jacket having at least an inner wall and outer wall, the inner wall being liquid permeable, a hazardous liquid swellable body being contained between the inner wall and outer wall and being generally co-extensive with the inner wall and the outer wall, and a third jacket of a hazardous liquid vapor impervious membrane. The package provides substantial improvement in safety when transporting a container containing a hazardous liquid.

Abstract: Film is prepared by a trapped bubble process. The inflated tube of plastic material is subsequently further expanded by trapped internal gas to provide a bubble and orientation of the film. Irregularities in the film are randomized by cyclic rotation of the tube and bubble with a rotating means having a variable speed drive.

Abstract: Alkenyl aromatic polymers such as styrene polymers are devolatilized in a molten condition by the introduction of methanol and the volatiles removed under vacuum. A low level of residual monomer is readily obtained.

Abstract: Foamed shapes having an elongate cross-sectional configuration are prepared extruding with the major axis of the cross-sectional configuration of the die opening in a generally vertical plane, passing the extrudate to a shaping device having the desired elongate cross-sectional configuration which has its major axis in a generally horizontal plane. Improved extrusion rates are obtainable and the amount of blowing agent required to provide a given degree of expansion is reduced when compared to extrusion with the major axis of the extrusion die disposed in a horizontal plane.

Abstract: Improved mixing is obtained in a reciprocating screw injection molding machine by providing an axial passage within the screw. The passage provides communication between the discharge end of the screw and an upstream location. A valve is disposed within the passage to provide selective communication. Recirculation of melt within the passage and about the screw provides improved mixing.

Abstract: Injection molded plastic doors having only one face of the door exposed to view in an intended installation are prepared by injection molding a foam plastic door and providing a box beam generally centrally disposed within the door on the usually nonvisible face. Lightweight and high strength are obtained. Such doors are very satisfactory for folding closet door applications.

Abstract: A settable foam plastic product being formed in a mold cavity is compressed, after a film has formed on the surface of the product, but before final setting of the product. This compression step, which is carried out by reducing the volume of the mold cavity, has the advantage of increasing the accuracy of reproduction of fine surface detail. The compression step also permits stops to be readily removed to enable subsequent full opening of the mold cavity. This use of movable stops in turn facilitates absorption of the forces encountered during the injection step with less massive machine structure than heretofore, resulting in the possibility of economical manufacture of larger products. The machine also includes an improved mold cavity construction in which the parting planes are perpendicular to the main plane of the product, and incorporating laterally movable end and side mold members to facilitate removal of the product and the formation of surface detail on edge surfaces of the product.

Abstract: Walled structures are prepared from foam-in-place components such as those used to prepare rigid polyurethane foams wherein successive strips of foam are deposited and hardened within a three-sided enclosure having a generally H-shaped configuration. A foraminous scrim such as glass fiber mesh forms part of the vertical legs of the H and foam is disposed below the cross piece of the H to bond to adjacent scrim facing sheets and scrim of a previously disclosed strip. The foam is significantly reinforced, joined to the previously deposited structure and foaming components are isolated from depositing apparatus.