Abstract: A screw holder system for manually positioning screws for driving provides a finger-protecting spool-shaped body with coaxial bore having closer to the bottom end than to the top a screw-centering, resilient biasing apparatus; similar bottom-plan and top-plan aspects suit the system for inverted use to hold longer screws; a bushing held by the biasing apparatus adapts the system for holding a different range of screws, with smaller head diameter; a self-levelling device is provided for use either-end-up; an axial extender provision adapts the system for use with longer screws or alternatively with greater screwdriven overlap.

Abstract: This disclosure relates to a seal which is particularly suited for use in a coolant pump of an internal combustion engine. The seal parts are subjected to high rotational torques during operation of the pump, and the seal parts are constructed and assembled in such a manner as to accommodate the rotational torques. The seal includes a flexible bellows having a composition which withstands the engine coolant on one side and oxidation on the other side, and has ribs which strengthen it. The seal faces are constructed of a material and have dimensions to reduce the magnitude of the rotational torques. The seal parts are secured together so as to prevent them from being pulled apart by the rotational torques, adhesives being used for this purpose which withstand the engine coolant.

Abstract: A process for rapidly producing a substantially uniform, solid, cellular thermoplastic article comprising the steps of: (a) charging a vessel with (1) a solid thermoplastic polymer, (2) a solvent mixture the amount of which in the range of from about 25-50% by weight of said polymer boils at or below 0.degree.C. and to prevent shrinkage the minor amount of which in the range of from about 3-30% by weight of said polymer boils at or near 20.degree.C.