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| Number | Title | Issue Date |
| 4964903 | Apparatus for molding glass molds An apparatus for molding a glass mold for subsequent molding of glass optical elements or lenses is disclosed. The apparatus comprises a master having a snout and a master ring disposed around the snout. The master and master ring may be of unitary constr... | 10/23/1990 |
| 4940479 | Method for manufacturing float glass A direct current magnetic field is applied to a molten metal bath to control the movement of molten metal. A glass ribbon is formed on the molten metal bath to have a predetermined thickness and is moved on the surface of the molten metal bath controlled ... | 07/10/1990 |
| 4936890 | Convexing/tempering installation for the manufacture of glass not bent into convex shape on said installation The invention concerns the use of a convexing/tempering installation for the manufacture of flat sheet glass or, in general, of glass not bent into convex shape on said installation. It proposes passing glass plates are passed through a conventional conve... | 06/26/1990 |
| 4935046 | Manufacture of a quartz glass vessel for the growth of single crystal semiconductor A quartz glass crucible adapted for use in a process for pulling a single crystal semiconductor material having an opaque outer substrate of a quartz glass with a relatively high bubble content and an inner transparent glass layer which is substantially f... | 06/19/1990 |
| 4929265 | Method of molding glass optical elements A method of molding precision glass optical elements or lenses is disclosed. Precision molded glass molds are first provided which define a glass mold cavity having a predetermined desired size, shape and volume corresponding to the glass optical element.... | 05/29/1990 |
| 4925475 | Method and apparatus for manufacturing preform for fluoride glass fiber A method and an apparatus for manufacturing a fluoride glass fiber preform are disclosed which preclude the step of pouring a glass melt into a mold from a crucible, and hence permit the fabrication of a long, homogeneous fluoride glass fiber preform free... | 05/15/1990 |
| 4923496 | Method of fabricating fluoride-glass integrated optical waveguides Integrated optical guides are fabricated on fluoride glass plates by expog such plates to an atmosphere of a gaseous halogen other than fluorine, or of a compound capable of generating such a halogen, at high temperature and pressure, so as to obtain a i... | 05/08/1990 |
| 4923499 | Article transfer mechanism Plural article transfer mechanisms are operated in timed sequence by an electronic control synchronized to a main drive shaft. Each article transfer mechanism transfers articles from a dead plate to a moving conveyor. An extensible-retractable pusher arm ... | 05/08/1990 |
| 4921522 | Method and apparatus for forming a micropipette with uniform application of heat The micropipette puller of this invention includes a pair of gripping jaws that pull a length of glass tubing in opposite directions. The source of heat is a laser device and a laser beam is directed against the glass tubing between the gripping jaws and ... | 05/01/1990 |
| 4921520 | Process for applying forces to glass sheets, in particular at a high temperature The present invention relates to a process and a device for applying tensile forces, with no contact with solid walls, to glass sheets, in particular at high temperatures, wherein a gas or vapor is blown between the glass sheet and a wall closely approach... | 05/01/1990 |
| 4918946 | Process and device for bending glass sheets A glass sheets is loaded flat on the end of a conveyor going through a tunnel furnace; comes out again through the other end of the conveyor after having reached its bending temperature; is conveyed by a first transfer device to a bending unit which inclu... | 04/24/1990 |
| 4917934 | Telescope mirror blank and method of production A telescope mirror blank having a supporting network core composed of sintered ceramic struts, and a method of forming such core from a thermally crystallizable, powdered glass and as a separate component from the faceplate, are disclosed. Optionally, the... | 04/17/1990 |
| 4917717 | Apparatus for and process of coating glass Apparatus for pyrolytically forming a metal compound coating on an upper face of a hot glass substrate 1 comprises conveyor means 2 for conveying the substrate 1 in a downstream direction 3. A coating chamber 6 opening downwardly onto the path 1 and means... | 04/17/1990 |
| 4915723 | Apparatus for casting silicon with gradual cooling For the continuous casting of silicon, an electrically conductive bottomless crucible is circumferentially divided by axial slits and is positioned within an electrical induction coil. The slits form circumferential gaps of between 0.3 mm and 1.0 mm and t... | 04/10/1990 |
| 4913718 | Molding method for optical element and apparatus therefor Disclosed is a glass press molding method which comprises a step of heating glass material and a mold die composed at least of an upper mold die and a lower mold die for molding the glass material; a step of pressing the glass material by means of the mold die... | 04/03/1990 |
| 4913720 | Glass sheet modulated quenching A glass sheet tempering method and resultant glass sheet are disclosed as being provided by modulated quenching that initially cools the oppositely facing surfaces of a conveyed glass sheet at a first cooling station (14) with a first rate of heat transfe... | 04/03/1990 |
| 4913719 | Method and apparatus for forming micropipette of controlled configuration by selecting the pattern of heat application A micropipette puller of this invention includes a pair of gripping jaws that pull a length of glass tubing in opposite directions. The source of heat is a laser and a beam is directed into a zoom lens, or a selected one of a series of lenses, so that a b... | 04/03/1990 |
| 4911743 | Glass structure strengthening by etching A method of producing a superior quality of glass or other brittle material. The resulting end product is substantially stronger than conventional glass and exhibits greater strength consistency than was previously known. The techniques include various co... | 03/27/1990 |
| 4911744 | Methods and apparatus for enhancing combustion and operational efficiency in a glass melting furnace In a glass melting furnace of the type that has a basin wherein a bath of molten glass is heated by a blanket of flame that extends over the molten bath, performance and productivity are enhanced by installing oxygen injection lances through holes that ar... | 03/27/1990 |
| 4909823 | Glassware forming machine with cooling system A cooling system for a glassware forming machine in which air is delivered to each of two plenums for upward flow of air through vertical passages in mold members on the plenums from an air outlet on the base of the machine via an air duct. The inlet end ... | 03/20/1990 |
| 4909820 | Method of and an apparatus for bending glass plates for a laminated glass Two glass plates on a bending mold are heated in a heating/bending furnace so that they are subjected to provisional deep-bending operations by their own deadweight, and the provisionally shaped deep-bent portion is pressed by an auxiliary pressing member... | 03/20/1990 |
| 4909819 | Method for bending glass sheets A method for bending glass sheets is disclosed in which a heated glass sheet (12) is introduced between spaced upper and lower bending platens (16,18). Heat source (19), integral with platen (18), is operable for applying heat in close proximity to the gl... | 03/20/1990 |
| 4909824 | Apparatus for bending glass sheets An apparatus (10) is disclosed for bending and tempering a heated glass sheet (12) between first and second bending platens (14,32). Platens (14,32) include actuators (22,36) respectively, for deforming the platens (14,32) to form the desired bend in the ... | 03/20/1990 |
| 4906269 | Method of and apparatus for manufacturing a glass object A glass object having protrusions and/or recesses, for example a glass lid (1) with a handle (2), is produced in an IS machine by pressing molten glass from above in a mould with the cover of the mould, in a mould defined by said cover, by a shaping mould... | 03/06/1990 |
| 4906270 | Method for drawing glass tapes A method for drawing glass sheets of crystallization-sensitive glass such as borosilicate glass or glass ceramic. A melt in a vat of a glass furnace is supplied through a feed channel to a drawing chamber from which a glass sheet is drawn perpendicularly ... | 03/06/1990 |
| 4906271 | Covering for the tempering of glass A device for air-tempering, optionally associated with bending of glass plates includes a covering made of a metal fabric and exhibiting a thermal conductivity less than 3 and preferably less than 0.2 W.M-1.K.sup.-1. It has utility for covering... | 03/06/1990 |
| 4904294 | Belt assisted press bending A heat softened glass sheet is conveyed directly from a heating furnace onto an advancing conveyor belt which is supported on a scissor table. The glass sheet is advanced on the belt to a position below an upper press face. The scissor table increases the... | 02/27/1990 |
| 4904533 | Glass sheet heat treated by opposed burners A gas burner (20) disclosed has general utility but has particular utility when utilized in a closely spaced relationship to roller conveyed glass sheets to provide forced convection heating. The burner (20) includes a cobbustion member (38) in which gas ... | 02/27/1990 |
| 4902331 | Process for bending a glass sheet and support device adapted to this process A process and apparatus for shaping a glass sheet according to which the sheet is lifted above the conveying plane by a device for supporting a glass sheet consisting of a box open at the bottom whose opening at the bottom corresponds to the shape of the ... | 02/20/1990 |
| 4900337 | Method and apparatus for working molten glass The invention relates to working molten glass in tank furnaces for continuous production. According to the process of the invention, the vitrifiable material being brought first to the molten bath state in a zone upstream from the tank, and said bath then... | 02/13/1990 |
| 4898603 | Method for manufacturing halide glass optical fiber A halide glass core fiber is clad by providing two melts that selectively join to form the molten clad fiber in a temperature range from 580° C. to 600° C. A separate heating means controls the fiber melt at the die nozzle. Because of the low viscosity ... | 02/06/1990 |
| 4898605 | Glass vessel in particular, an ampoule and a method for treating the glass vessel A glass vessel, in particular an ampoule, having a prestress produced at a predetermined spot of the vessel which permits an automatic opening of the vessel at the predetermined spot following scratching by means of a suitable tool. The prestress, which i... | 02/06/1990 |
| 4898777 | High-strength fluoride glass fibers and process of making A novel solution of H3 BO3 dissolved in strong hydrochloric or nitric acid is used to etch fluoride glass preforms used to manufacture fluoride glass fibers. Because of the excellent cleaning ability of the present solution, as well ... | 02/06/1990 |
| 4897100 | Apparatus and process for fiberizing fluoride glasses using a double crucible and the compositions produced thereby A double crucible fiberizing apparatus and process for producing a continuous glass filament having a core fluoride-containing glass concentrically surrounded by a clad fluoride-containing glass at increased throughput speeds while simultaneously achievin... | 01/30/1990 |
| 4897101 | Method of forming a precision glass mold and article A method of forming precision glass molds suitable for molding glass optical elements or lenses is disclosed. The glass molds define first and second opposed optical molding surfaces. Each master is formed by defining a master cavity adapted to form a fir... | 01/30/1990 |
| 4897102 | Glass sheet press bending mold An improved covering for continuous surface press bending molds providing selectively variable rigidity for matching that desired in bending a particular part on the mold. The shaping element of the mold includes a resilient body having a latticework of f... | 01/30/1990 |
| 4894079 | Method and apparatus for supplying glass forming raw material In a method for supplying a glass forming raw material in a reactor which comprises bubbling a carrier gas into a liquid glass forming raw material contained in a container and supplying a mixture of the glass forming raw material and the carrier gas in t... | 01/16/1990 |
| 4894080 | In-lehr glass sheet press bending using pressurized gas Glass sheets are positioned on a shaping rail of an outline shaping mold form movement through a heating lehr and subsequent preliminary sag bending. The mold with the glass sheet supported thereon is positioned between a pair of vertically aligned pressi... | 01/16/1990 |
| 4894078 | Method and apparatus for producing optical fiber In a method for producing an optical fiber having a resin coating, an optical fiber which is drawn from a preform for an optical fiber heated and melt by a heating source can be effectively cooled before it is coated with a resin by cooling the drawn fibe... | 01/16/1990 |
| 4892574 | Apparatus for the horizontal bending and tempering of glass sheets The critical peripheral sections of glass sheets are bent to a deep or sharp curvature through the use of a plurality of press forming means integrally provided on the mold ring of a gravity bending and tempering horizontal lehr, said press forming means ... | 01/09/1990 |
