Abstract: A method of generating cracks in a polycrystalline silicon rod, comprising: heating a polycrystalline silicon rod; and subsequently performing local portion cooling of the polycrystalline silicon rod to apply a refrigerant fluid onto a spot-like area of a surface of the polycrystalline silicon rod.

Abstract: Apparatus for forming a cased glass stream having an inner core glass surrounded by an outer casing glass that includes a spout for delivering core glass from a first source through a first orifice. A second orifice is vertically spaced beneath and aligned with the first orifice, and is surrounded by an annular chamber that communicates with the second orifice through a gap between the first and second orifices. A tube delivers casing glass from the outlet opening of a casing glass spout to the annular chamber in such a way that glass flows by gravity through the orifices from the first and second sources to form the cased glass stream. A hollow tube within the casing glass spout is positioned with respect to the spout outlet opening for metering flow of casing glass through the outlet opening and delivery tube to the annular chamber surrounding the orifices.

Abstract: An I.S. machine has a blankmold which is open at the top and includes inner and outer annular top sealing surfaces. Associated with the blankmold is a baffle including a body having a cup shaped portion closed with a vertical cylindrical bore open at the bottom, an annular bottom sealing surface for sealingly engaging the blankmold outer annular top sealing surface, and a top having a hole. A tubular sleeve communicates with the hole and extends vertically upwardly from the top of the body. A piston has a cylindrical head including a top surface, a cylindrical sealing surface and an annular bottom sealing surface having a plurality of radial notch means across the bottom thereof. A tubular rod extends vertically upwardly from the top surface for slidable displacement in the tubular sleeve, and a collar is secured to the top of the rod.

Abstract: In a method of producing a glass gob by continuously dropping a molten glass 9 from a nozzle 2 in a dropping direction, a gas flow 20 is caused to continuously flow in the dropping direction along an outer peripheral surface of the nozzle 2 at a predetermined flow rate. The gas flow 20 applies a wind pressure to the molten glass 9 appearing from a nozzle end 2a of the nozzle 2 to drop the molten glass 9.

Abstract: In a method of producing a glass gob by continuously dropping a molten glass 9 from a nozzle 2 in a dropping direction, a gas flow 20 is caused to continuously flow in the dropping direction along an outer peripheral surface of the nozzle 2 at a predetermined flow rate. The gas flow 20 applies a wind pressure to the molten glass 9 appearing from a nozzle end 2a of the nozzle 2 to drop the molten glass 9.

Abstract: An I.S. machine has a blankmold which is open at the top and includes inner and outer annular top sealing surfaces. Associated with the blankmold is a baffle including a body having a cup shaped portion closed with a vertical cylindrical bore open at the bottom, an annular bottom sealing surface for sealingly engaging the blankmold outer annular top sealing surface, and a top having a hole. A tubular sleeve communicates with the hole and extends vertically upwardly from the top of the body. A piston has a cylindrical head including a top surface, a cylindrical sealing surface and an annular bottom sealing surface having a plurality of radial notch means across the bottom thereof. A tubular rod extends vertically upwardly from the top surface for slidable displacement in the tubular sleeve, and a collar is secured to the top of the rod.

Abstract: An I.S. machine has a blankmold which is open at the top and includes inner and outer annular top sealing surfaces. Associated with the blankmold is a cup shaped baffle having an annular bottom sealing surface. A tubular sleeve extends vertically upwardly from the top of the body. A piston has a cylindrical head including a top surface, a cylindrical sealing surface and an annular bottom sealing surface having a plurality of radial notch means across the bottom thereof. A tubular rod extends vertically upwardly from the top surface for slidable displacement in the tubular sleeve. The collar is displaced vertically downwardly to bring the cup shaped portion annular surface into sealing engagement with the blankmold.

Abstract: Method and apparatus for producing vitreous optical elements by injection molding, which essentially includes the stages of: melting down a glass material into a molten state in a viscosity at or lower than a working point of the glass material; injecting molten glass under pressure into a mold cavity defined between transfer surfaces of relatively movable mold members of a mold assembly unit in communication with a sprue connecting the mold cavity with an injection port on the outer side of the mold assembly unit; and applying a predetermined pressure on the glass material in the mold cavity while cooling the mold assembly unit down to a temperature in the vicinity of yielding point of the glass material.

Abstract: A nozzle tip for a glass injection cartridge loaded with a rod-shaped glass material and having a heater for melting down the glass material into a molten state for injection into a mold, the nozzle tip containing:a) a nozzle body having a conical shape converging forwardly from a rear-end portion fitted on a fore-end portion of the glass injection cartridge, the nozzle body being formed of tungsten carbide and internally defining a molten glass passage extending axially throughout the nozzle body from the rear-end portion toward a converging fore-end portion to be connected to the mold; andb) a glass releasing layer coated substantially on the entire surface of the nozzle body including the molten glass passage,wherein the glass releasing layer is selected from the group consisting of HfN, BN, TiAlN, CrN, ZrN and TiN.

Abstract: An I.S. machine comprises a plurality of individual sections arranged in side by side relation. Each section has a section frame having a top wall having a front and a back and opposed sides on which is mounted a blank station including a mold opening and closing mechanism for forming a parison from a gob of molten glass, a blow station including a mold opening and closing mechanism for forming a parison into a bottle, and an invert and neck ring holder mechanism supported which is located between the mold opening and closing mechanisms for transferring a parison therebetween. The machine also has a baffle mechanism includinga blowhead carrier, a motor having an output, a transmission for transmitting the output of the motor to the blowhead carrier to displace the carrier, a housing for housing the transmission. The housing is secured on the top wall proximate the front thereof.

Abstract: A baffle assembly for use in a glassware forming machine to provide a settle blow to settle a gob in a parison forming mould cavity and a mould closing surface to close the mould cavity comprises a first member which comprises a mould cavity closing surface and settle blow air passages opening to positions spaced from the mould closing surface, and a second cup shaped member mounted on the first member for axial movement between an extended position and a second position in which a circumferential locating surface on the second member is substantially level with the end surface of the baffle head.

Abstract: A parison mold and baffle system for an automatic molding machine of the I-S type including a two piece split parison mold with an integral funnel thereon. The funnel portion terminates upwardly in an annular opening with walls of outwardly tapering cross section. A combined blow-down and baffle head has blow-down nozzles, a downwardly facing annular groove which is snugly received on the walls of the funnel in both the blow-down and mold closing baffle positions. Blow-down starts from the initial engagement of the blow-down and baffle head on the funnel and continues until said mold end is completely closed by the baffle.

Abstract: A parison mold and baffle system for an automatic molding machine of I-S type includes a two piece split parison mold with an integral funnel. A combined blow-down and baffle member cooperates with the mold in a first position to perform the blow-down function and then in a second position acts as the bottle bottom end of the mold during the blow-back final shaping of the parison.

Abstract: An apparatus for converting molten glass containing radioactive waste into molded pellets or spheres comprising means for generating a flowing stream of the molten glass and a rotating wheel disposed beneath the flowing stream. The wheel is preferably mounted for rotation about a horizontal axis and has a series of mold cavities formed in the circumferential wall of the wheel, into which cavities the stream is directed by gravity. The mold cavities have flared side walls so that when the stream strikes the inclined wall it is deflected toward the center of the cavity through a focal point. The side walls of adjacent mold cavities form a knife edge at the surface of the wheel to preclude the bridging of glass from one cavity to another.

Abstract: Molding of hollow glass articles wherein a gob flows from a feeder into a mold and forms a hollow tube as it enters the mold, and a pressure differential is applied across the tube so that the tube is shaped in the mold to form the hollow article. During application of the pressure differential, deformation of the glass between the feeder and mold, is prevented by proximately positioning of the feeder and mold.