Abstract: An apparatus and methods for mixing and injecting a foam core within an extruded shell preferably of plastic downstream from an extrusion die to produce a uniform building product. The preferred apparatus includes a mixing head injector for mixing a binary system foam. The mixing head injector incorporates pressurized gas injection for homogenization of the foam core. A preferred method employs the mixing head injector and a novel calibrator thereby allowing injection of a foam core within the shell as it passes through a calibrator to reliably produce a uniform building product. An alternative method employs a second extruder. Alternative methods employ a mounting fixture downstream of a first calibrator.

Abstract: An apparatus and methods for mixing and injecting a foam core within an extruded shell preferably of plastic downstream from an extrusion die to produce a uniform building product. The preferred apparatus includes a mixing head injector for mixing a binary system foam. The mixing head injector incorporates pressurized gas injection for homogenization of the foam core. A preferred method employs the mixing head injector and a novel calibrator thereby allowing injection of a foam core within the shell as it passes through a calibrator to reliably produce a uniform building product. An alternative method employs a second extruder. Alternative methods employ a mounting fixture downstream of a first calibrator.

Abstract: An apparatus and methods for mixing and injecting a foam core within an extruded shell preferably of plastic downstream from an extrusion die to produce a uniform building product. The preferred apparatus includes a mixing head injector for mixing a binary system foam. The mixing head injector incorporates pressurized gas injection for homogenization of the foam core. A preferred method employs the mixing head injector and a novel calibrator thereby allowing injection of a foam core within the shell as it passes through a calibrator to reliably produce a uniform building product. An alternative method employs a second extruder. Alternative methods employ a mounting fixture downstream of a first calibrator.

Abstract: An apparatus and methods for mixing and injecting a foam core within an extruded shell preferably of plastic downstream from an extrusion die to produce a uniform building product. The preferred apparatus includes a mixing head injector for mixing a binary system foam. The mixing head injector incorporates pressurized gas injection for homogenization of the foam core. A preferred method employs the mixing head injector and a novel calibrator thereby allowing injection of a foam core within the shell as it passes through a calibrator to reliably produce a uniform building product. An alternative method employs a second extruder. Alternative methods employ a mounting fixture downstream of a first calibrator.

Abstract: An improved slat to be inserted through and attached to a chain link fence to provide privacy, security, and protection from particulate matter and sound. Slats of this improved type are positioned vertically, side-by-side along the fence. The slat is formed of longitudinal ribs giving it a corrugated nature. This gives strength and dimension to the slat. Raised retaining tabs are formed on a slat rib on one side of the slat. The retaining tabs are formed of unitary raises. A length of a chain link fence interlocks into a groove formed between the two unitary raises to secure the slat to the fence. In a preferred embodiment, the vanity slat apparatus is formed of PVC.

Abstract: An earth mover blade stabilizing system for maintaining the blade height constant independent of a change in the earth mover's pitch angle. A damped pendulum having a magnetic end moving between two LOHET sensors generates a signal which is used to control the earth mover's hydraulic blade actuation system. An electronic biasing means is provided by which the blade height can be incrementally repositioned to facilitate an automatic grading of a surface to a predetermined slope angle.