Abstract: This disclosure relates to both a method and apparatus for forming injection molded articles in a molding assembly which includes a heated runner housing adjacent a cooled mold. In a first disclosed embodiment, a slidable gate valve having a supply passageway is interposed between and in contact with both the cooled mold and heated runner. A layer of insulation material is included on the slidable gate valve to thermally segregate the differential temperature zones of the mold and runner. In a second embodiment, an axially reciprocable pin valve selectively opens and closes a passageway between a heated runner housing and a cooled mold to regulate the flow of plastic material. An annular sleeve of insulation material is telescoped over a portion of the pin valve to likewise thermally segregate the runner and mold.

Abstract: There is disclosed a novel degradable plastic composition consisting of an organic polymeric material, said material having dispersed therein at least one organic derivative of a transition metal and at least one readily autoxidizable organic material.

Abstract: Improvements are provided in glass forming processes of the type wherein hot metal blank molds are employed by using the complementary action of a solid film lubricant layer, of graphite dispersed in a cured thermoset organopolysiloxane, along with an overspray of a lubricating oil.

Abstract: A rimless faceplate is mounted on a shadow mask color selection device for a color television tube construction by indexing means establishing a unique positional relationship between the faceplate and the mask. An array of cavities on the inner surface of the plate interfit with the studs on mask mounting brackets to provide transverse positioning while the bracket surfaces extending outward from the studs provide abutting surfaces to the inner face of the faceplate adjacent its stud receiving cavities to establish faceplate-mask spacing. A glass funnel receives the mask in its divergent end with precise spacing of the mask from its seal edge. Portions of the mask mounting brackets are fitted into seats in the funnel which may be cavities or depressions in the seal edge to establish the spacing, particularly the depth of entry of the mask in the funnel.