Abstract: A glass delivery system is disclosed having a glass conducting pipe enclosed within a refractory structure. The refractory structure is spaced about the pipe and defines a closed space for receiving therein a quantity of the glass. Heat input devices are located in the closed space for supplying heat to the pipe. The refractory structure may include heat exchange passages for circulation of a first heat exchange fluid therethrough. Means may be included for introducing a second gaseous fluid within the closed space between the refractory structure and the pipe for removing heat given up by the glass and under certain conditions the first fluid may act as an inert atmosphere or purge gas for protecting certain components of the system from deleterious ambience. The first heat exchange fluid removes a relatively greater portion of the heat energy given up by the glass than the second fluid.

Abstract: There has been provided a delivery system for conditioning molten thermo-plastic material, wherein a first pipe member, having an inlet at one end adapted to receive the material and an outlet at an opposite end for delivering the material therefrom at a desired homogeneity is coupled at its inlet end to a furnace. An insulated shell structure, having at least one fluid inlet and outlet therein, is located concentrically about the first pipe member and defines a closed insulated space thereabout. The shell is adapted to receive heat exchange fluid for circulation from the inlet to the outlet in said closed space for removing heat from the thermo-plastic material flowing through the pipe member. Means is provided for shielding inside surfaces of space between the shell and the pipe member from deleterious ambient including a purge fluid which may act alone as the heat exchange fluid.

Abstract: A dual-mode takeout mechanism is provided for use in, for example, an individual section glassware forming machine. In the normal mode of operation, the formed ware is transported in a fixed radius vertical arc from a molding station to a cooling station and released for further processing. In the reject mode of operation, defective formed ware is transported in an enlarging vertical arc from the molding station to a disposal station. An arm of the takeout mechanism is capable of extending in telescoping fashion, and is activated in the reject mode so as to begin the extension process as the takeout mechanism begins to transport ware from the molding station. A controller is provided to detect when the reject mode has been commanded. The reject mode can be entered for a desired number of cycles by computer command, sensor command, or operator command (manual entry). If the reject mode has been entered, the controller operates a solenoid controlled valve which extends the arm pneumatically.

Abstract: In a glass melting operation, cullet is employed as a waste heat collector and/or particulate emissions collector. Cullet is contacted with exhaust gases in a gas/solid contact vessel wherein the cullet is heated and particulates are deposited onto the cullet. The heated cullet is preferably sent directly to the melting furnace. Electrostatic means may be employed to enhance particulate collection in the bed of cullet.

Abstract: A hollow glass article having an improved optical finish which is formed by placing a molten material in the original article while it is constrained in a mold. The molten material softens the glass and produces a hydrostatic pressure which reforms the article into the finished shape by expanding the original glass article to the shape of the mold.

Abstract: Granular heat exchange medium is employed to recover waste heat from a combustion furnace, particularly a glass melting furnace, and the heated medium is then employed to pre-heat combustion air entering the furnace. A bed of granular heat exchange medium also may remove particulate emissions from the exhaust gas.

Abstract: An improved sealing glass composition for making compression glass electrical feedthroughs in semiconductor device packages is described wherein the improved sealing glass consists essentially of (by weight percent) 63-68% SiO.sub.2, 3-6% Al.sub.2 O.sub.3, 8-9% K.sub.2 O, 5-6% Na.sub.2 O, 0.5-1.5% Li.sub.2 O, 2-4% BaO, 5-7% SrO, 2-4% CaO, 0.5-1.5% MgO, 0.5-1.5% TiO.sub.2, and 0.5-1.5% B.sub.2 O.sub.3.

Abstract: A skimmer for use in a throat of a melting furnace. The skimmer comprises a plate having a plurality of passages therein with the passages being through the plate from a first side to a second side. Adjacent passages are in communication with each other to form a continuous passage through the plate. A first means for blocking the ends of the passages on the first side of the plate and a second means for blocking the ends of the passages on the second side of the plate are attached to the plate. A first port means is in communication with one end of the continuous passage for connecting with a cooling inlet located outside of the furnace, and a second port means is in communication with the other end of the continuous passage for connecting with a cooling outlet located outside of the furnace.

Abstract: In the shaping of sheets of heat-softenable material such as glass and other deformable materials, a hot sheet engages an apertured lower sheet of a deformable vacuum box while the sheet and the box are flat and conforms to the changing shape of the box. Since the box intermittently engages a hot deformable sheet for shaping and releases the deformed sheet after shaping, its lower apertured sheet is exposed to a wide temperature cycle, which causes the lower apertured sheet to warp away from the shape desired for the deformable sheet. The present invention provides structure for the deformable box that avoids such warpage while retaining the ability of the box to maintain sufficient vacuum to hold and distort the hot sheet while the box changes shape into its desired configuration with minimum warpage therefrom so that the hot sheet develops a desired curved configuration while held thereagainst during deformation of the box.

Abstract: Method and apparatus for manufacturing glass progressive power lenses. The lenses are manufactured by a vacuum forming technique in which a glass lens is placed upon a forming block, heated to its softening point, and then forced to sag against and assume the shape of the forming block surface by the creation of a vacuum between the lens blank and the block surface. The forming block is provided with a plurality of apertures through which the vacuum is drawn and these apertures are positioned so as to ensure the maintenance of an adequate pressure differential between the two surfaces of the lens blank as it sags in a wave-like manner from its center towards its periphery.

Abstract: A glassware-making apparatus has a premold adapted to make a parison and a final mold spaced from the premold and adapted to receive and blow-mold the parison. An arm removes the parison from the premold and displaces it along a path to the final mold. A scrap chute can be displaced by a controller into a position intercepting this path to catch the parison and divert it to a recycle/scrap bin when the controller detects a malfunction at the final mold or downstream therefrom.

Abstract: A process is provided for employing scrap glass (cullet) having an organic coating thereon in an overall process wherein molten-glass forming ingredients are converted into agglomerates and the agglomerates preheated to an elevated temperature prior to melting in a glass melting furnace. The organic coating is pyrolized, i.e., thermally decarbonized, during the preheating of the agglomerates.

Abstract: Method and device for reducing NO.sub.x content in the waste gas generated in a glass melting furnace of side firing or end firing type equipped with a heat recovering device, comprising supplying hydrocarbons in a counter flow to that of the waste gas by combustion, or from the corners of the combustion chamber into the combustion chamber over the melt tank.

Abstract: A method of vertically positioning ribbon engaging devices in a glass forming chamber includes suspending a contact member within the chamber a known vertical distance relative to the device, moving the contact member toward the surface of a pool of molten metal contained within the glass forming chamber while moving the device to maintain the known vertical distance; and generating a signal when the contact member engages the pool of molten metal to indicate that the device is vertically positioned said known vertical distance from the surface of the pool of molten metal.

Abstract: In a device for the gasification of carbon and/or carbon-containing media, in particular for the continuous production of a gas essentially containing CO and H.sub.2 with a molten bath of iron or an iron alloy, a reactor receives the carbon-containing media and oxidizing gasification media under the surface of the molten bath, and outlets are provided for gas and for removing at least one liquid phase, in particular slag. The reactor is stationary and is tightly sealed to a gas outlet and to a liquid outlet. In a wall region of the reactor and close to the floor thereof a plurality of nozzles are provided for feeding the gasification media. The nozzles are distributed almost symmetrically with respect to a vertical plane which extends axially with respect to the liquid outlet and to the reactor floor about the circumference of the wall region.

Abstract: An apparatus for making hollow glassware has at least one preform provided adjacent a turntable rotatable about an upright axis and carrying at least two angularly spaced final molds. The turntable can rotate about this axis so as to orbit the final molds through a transfer position close to the perform and a takeout position angularly offset from the transfer position and remote from the preform. At least one arm is provided above the turntable and final molds and carries at least two respective mold heads. This arm is pivotal about the axis with the mold heads being vertically alignable and engageable with the respective final molds. The arm and mold heads can be pivoted about the axis independently of the turntable and a source of air at a pressure different from ambient is connected to the mold heads through the arm.

Abstract: The marginal edge portions of an accelerating ribbon of float glass are engaged by a plurality of opposed pairs of attenuating devices, each pair exerting substantially equal forces. The pairs of attenuating devices are positioned longitudinally adjacent one another such that the ratio of the ribbon width intermediate adjacent pairs to the average of the ribbon widths at each pair is greater than 0.95. The attenuating devices may be edge rolls each rotating with a peripheral velocity a predetermined amount greater than the linear velocity of the ribbon immediately upstream.

Abstract: Quenching apparatus for tempering curved glass plates includes upper and lower blower head devices which project quenching air, each of the devices including a central blower head and side blower heads disposed upon opposite sides of the central head. The side blower heads are adjustable depending upon the particular curvature of the curved glass plate to be tempered. The nozzles of the central head may also be replaced or exchanged so as to provide partial or full-surface tempering to the plates.

Abstract: A method of and apparatus for attenuating a ribbon of float glass in a temperature region below 1500.degree. F. (815.degree. C.) to diminish undesirable longitudinally oriented optical distortions. A cylindrical ribbon engaging device is rotated about an axis of rotation substantially parallel to the ribbon surface and the direction of ribbon flow to positively exert a plurality of outwardly directed lateral forces to an elongated substantial continuum of the marginal edge portion of the ribbon. Ribbon engaging elements are disposed about the circumferential surface of the cylindrical device in elongated helical paths, and the cylindrical device is rotated at an angular velocity such that the product of the angular velocity and the pitch of the helical paths equals the longitudinal velocity of the ribbon flow while the device acts upon the ribbon surface.

Abstract: A beading apparatus for an electron gun assembly having a plurality of self-indexing insulating support rods with a plurality of indexing cavities formed in a surface thereof comprises at least two bead blocks. Each of the bead blocks has a beading support surface with a plurality of apertures formed therein. An indexing pin is disposed in each of the apertures. Each of the indexing pins has a reference end which extends beyond the beading support surface and projects into the indexing cavities of the insulating support rods. A vacuum is applied to the support rods to retain the support rods in contact with the indexing pins. In a second embodiment a support foot is used in conjunction with the vacuum to retain the support rods in contact with the indexing pins.