Abstract: An improved electrical insulator for high voltage transmission lines is formed from certain polymer-based concrete compositions. An apparatus provides for the molding of the polymer-based mixture to form a highly degassed product. The method and apparatus include the ability to combine the constituents of the mixture in a mixer. A vacuum is applied to the mixture to degas the mixture. A mold is filled with the degassed mixture without introducing air thereinto in the absence of a vacuum. The resulting insulator has highly reduced air entrainment.

Abstract: In strand forming and packaging apparatus including a molten glass stream feeder and a single-collet, dual-package winder, cam and hook means are provided between the front and rear secondary shoe means to effect automatic threading of the rear strand into the rear secondary shoe means when the operator moves the front and rear strands into operative association with the collet and threads the front strand into the front secondary shoe means.