Abstract: An offset printing process is utilized for printing an acid resist ink onto both sides of a TV aperture mask. Printing is accomplished after the mask has been formed into an approximate spherical or cylindrical shape, and after a peripheral frame has been attached thereto. The resist ink employed is a pressure-sensitive hot-melt composition which forms an acid resistant film when deposited on the mask.

Abstract: There is disclosed a glass melting furnace having various forms of baffles located within the melt for dividing the furnace into zones and creating extended flow paths within the furnace for increasing the minimum residence time of the glass within the furnace and thereby improving glass melting and refining.

Abstract: An electric melting furnace is described for melting high electrical resistivity glass, such as E-glass, within a melting chamber surrounded by a relatively low electrically resistivity refractory, such as chromic oxide refractory, by utilizing interconnected peripherally positioned batch electrodes at substantially the same potential as the chromic oxide walls and centrally positioned electrodes which are immersed a greater distance than the batch electrodes. A quiescent zone is formed adjacent a lower portion of the melting chamber and the batch blanket and effective hydrostatic head of the molten bath are adjusted by controlling the immersion of the batch electrodes within the molten bath.

Abstract: A glass delivery system is disclosed which includes a molybdenum delivery pipe surrounded by molten glass and inductively heated by a water cooled induction heating coil surrounding the molybdenum pipe and spaced apart therefrom by means of refractory material.

Abstract: A method is set forth for controlling the height of batch material on the surface of a molten bath in a cold-crown or vertical melting furnace by measuring the level of the upper surface of the batch material, the level of the fusion line between the batch and bath, and the effective hydrostatic head of the molten glass and batch material thereon over a predetermined height at such known fusion line level. The thickness of the batch blanket is then determined from the level of the fusion line and the measured level of the top of the batch blanket, and power input and rate of batch distribution are controlled to maintain such desired levels and accordingly a predetermined batch thickness, by continuously monitoring the level of the batch material and the effective hydrostatic head.

Abstract: A method of encapsulating microelectronic devices. A jet of gas is directed to an area of the device which is to remain free from encapsulating material. Polymerizable encapsulating material is then applied to the device. The material flows around the region upon which the jet impinges. The material is then cured.

Abstract: A food cooking oven having exterior walls and inwardly spaced interior walls wherein the interior walls are electrically conductive and are connected to an electrical power source. In operation, the interior of the oven is heated to a food cooking temperature by passing an electric current through the interior walls of the oven.

Abstract: Radiant heat transfer is increased by introducing to hot gases, such as those normally present in furnaces, a material which provides finely sized particles therein of the type which increase the emissivity and luminosity of the gases. The material is introduced separately from the furnace fuel and preferably downstream of the flame produced by the burning of the fuel. In one embodiment, an unsaturated gaseous hydrocarbon such as acetylene is introduced into the furnace at a plurality of locations downstream of the flame. The unsaturated hydrocarbon exothermically cracks in the furnace to produce hydrogen and carbon particles in the furnace hot gases. The carbon particles increase the emissivity and luminosity of the hot gases and thus their radiant heat transfer to the furnace charge.

Abstract: A balance beam type scale which is particularly adapted for educational purposes, i.e. for use by grammar school children. The components of the scale are easily assembled. Also, the scale is so constructed and arranged as to permit the weighing of a solid article, granulated materials or a liquid. Although the scale is ruggedly constructed for use by children, it includes features which have heretofore only been found in more expensive scales, for example a check lever.

Abstract: Disclosed is a deep drawn paperboard container and a process for making it. The container has an inner wall comprising a water impermeable layer coated on a specific paperboard substrate. The deep drawn container is greater than about 1.375 inches deep, has a radius of curvature of its bottom corners of less than about 7/8 inches and an angle of inclination of its side walls of less than about 20.degree. from the vertical.

Abstract: A method and apparatus for assembling a carton from a body forming blank and a pair of end forming blanks wherein the end forming blanks each include a pair of side flaps and a bottom flap.

Abstract: A method and apparatus wherein a pair of generally upwardly extending flaps, foldably connected to the opposite walls of an open top box, may be folded and positioned within the box.

Abstract: A method and apparatus of forming a box from a substantially flat blank and subsequently collapsing the box.

Abstract: Disclosed is an apparatus and process for the molding of hollow articles. The apparatus comprises a mold cavity with a wire longitudinally disposed therein. A follower is slidably disposed about the wire in close abutment with both the wire and inside wall of the mold cavity. The follower is preferably disposed in the mold cavity toward its proximal end so as to provide an annular space between the wire and inside wall of the mold. In practice, material to be molded is injected into the annular space at the proximal end of the mold cavity and flows longitudinally toward the distal end of the mold cavity while pushing the follower along the wire ahead of it.

Abstract: An improved method for isostatically molding an elongated, cylindrical article from a powdered material. In accordance with the improved method, a mold, containing powdered material, is placed within a two-piece, perforated canister. The two pieces which form the canister are then resiliently clamped together. Thereafter, in accordance with conventional practice, the canister and the mold containing the powdered material are subjected to an isostatic pressing process. During the decompression step of this process, the mold may radially expand by pressing outwardly against the two-piece canister and thereby causing radial movement of the two-piece canister.By the use of this improved process, it has been found that long, slender rods can be isostatically molded whereas many prior art attempts to mold such rods have not been successful.

Abstract: A box spring grid which includes coil spring engaging ears and a plurality of support wires secured to the grid and each including an ear. The ends of each support wire may be reversely bent around one end coil of a coil spring. Also disclosed is a method of manufacturing a box spring support grid wherein ears are formed in all longitudinal wires, between each pair of transverse wires, and, subsequently, selected portions of certain longitudinal wires are removed.

Abstract: An apparatus which provides a reference light beam projected onto one and preferably all the walls of a room whereby a reference line is provided for positioning articles thereon.