Abstract: Glass shapes and sheets are cut directly from a heated glass ribbon while maintaining the optical quality of the cut glass. A float glass ribbon is removed from a glass forming chamber and prior to annealing, a line of cut is heated to its softening temperature. A blade arrangement thereafter penetrates the glass along the heated line of cut to sever the glass. The cut glass edge is shaped after cutting while the edge is still at the softening temperature. Duuring the line heating and cutting operation, the overall glass temperature is maintained above the strain point of the glass.

Abstract: The apparatus is arranged to hold side portions of three equally-spaced moulds. The apparatus comprises two holders (2 and 4) for opposite side portions of the moulds. One holder (2) comprises a support (12) on which moving means for moving the holders to open and close the moulds acts, a first carrier (16) for one side portion pivotally mounted on the support (12) and a second carrier (18) for two side portions pivotally mounted on the first carrier (16). The pivotal connections between the support (12) and the first carrier (16) and the first (16) and second (18) carriers are separated by half the mould spacing to balance the mould closing force between the three moulds.

Abstract: A bent and/or toughened coated glass is produced by subjecting glass having a coating comprising at least one metal having an atomic number of 22 to 29 and a thin layer of aluminum applied over said coating to a bending and/or toughening cycle in which the coated glass is heated to a temperature above the softening point of the glass.The invention is useful for the production of bent and/or toughened solar control glasses, low emissivity glasses (when the metal used is copper) and mirrors.

Abstract: A burner for producing glass fine particles provided with an intermediate passage between a central passage and an outer passage for surrounding the periphery of the central passage characterized by that the end of the intermediate passage is disposed inner side from the end of the outer passage and the end of the central passage is disposed between the end of the intermediate passage and the end of the outer passage. Thus, the burner can stably fabricate porous glass base material having GI type or triangular refractive index distribution and yet can suppress the production of bubbles.

Abstract: A gob distributor is disclosed having a deflector which will be operated whenever gobs should be prevented from entering the gob distributor. The deflector is operated by an interceptor valve which is controlled by an air operated four-way pilot valve. A pilot valve maintenance circuit is provided to periodically blow collected water and oil out of the pilot valve. This circuit inlcudes a frequency timer which will periodically operate a solenoid valve and a duration timer which controls the duration of this operation. Means are provided for preventing the operation of these timers beyond selected ranges which assures that any water or oil collected in the pilot valve will be cleared.

Abstract: The invention relates to techniques for surface deionization of glass under the effect of a corona discharge. The invention consists of treating the object which is movable in relation to the electrodes situated at a short distance from said object which is brought to a high temperature. The treatment is carried out under a continuous current which is regulated in intensity. The treatment is accordance with the invention is preferably applied to sheets of glass during their production.

Abstract: A mold cooling arrangement includes a plurality of closed bores vertically disposed in the mold between the molding surface and the mold exterior. A manifold positioned vertically above the mold communicates with the interior of each bore and a condenser is disposed vertically above and communicates with the manifold. The bores and manifold are at least partially filled with a liquid such as distilled water which partially evaporized during operation of the mold and the vapor rinse to the condenser is converted back to liquid and return by gravity to the manifold and mold bores.

Abstract: A process and apparatus for ceramising planar, transparent, substantially-rectangular sheets of glass-ceramic characterized in that the sheets are vertically suspended during the conversion process.

Abstract: An apparatus for manufacturing a glass stem for an electron tube comprises a first mold assembly and a second mold assembly for forming the stem therebetween. The glass stem includes a plurality of fillets with a lead-in conductor through less than all of the fillets and at least one dummy fillet without a lead-in conductor therethrough. The first mold assembly includes a universal stem having a mold block with fillet-forming openings therein. A replaceable marker pin is disposed and retained within the openings. The marker pin has a first end and an oppositely disposed second end. The first end has a distinctive geometric shape for contacting the dummy fillet and for conveying intelligible information thereto.

Abstract: A method and composition for coating scored regions or holes in glass articles prior to heat treatment in order to maintain residual compressive stresses and reduce venting are disclosed. The method and composition of the present invention utilize silica-containing sols which gel and density and ultimately form glassy films during the heat treatment of the coated glass articles.

Abstract: A device and a process for heating glass sheets in horizontal position, to bend them or temper them, by means of two series of resistors, the series being distributed on both sides of the path followed by the glass sheet and on a portion of the length of this path. Each resistor group is distributed in longitudinal zones or in crosswise subzones of various widths along the longitudinal zones, the power furnished to each longitudinal zone being regulated independently of the power furnished to the other longitudinal zones and being distributed in a controlled way between the crosswise zones and the longitudinal zones.

Abstract: Parisons of molten glass for subsequent moulding are molded in a mould cavity formed from one-piece lower portion (10), a dividable neck ring (14), and a dividable central mould portion (24). A gob of molten glass is introduced into a gov uide (58) so that the gob passes into the mould through the neck ring (14). A plunger guide (42) which serves to guide the plunger (26) through the neck ring (14) is introduced into the gob guide (58) and a plunger (26) is introduced into the plunger guide (42) so that the plunger enters the mould through the neck ring (14). During pressing of the glass, the guide (42) which serves to guide the plunger (26) through the neck ring (14) is pressed downwardly on to the neck ring (14). The guide (42) defines a sealing surface (54) of the neck portion (16) of the mould cavity.

Abstract: A glass bending and tempering apparatus (20) is disclosed as including a pair of opposed bending platens (24) for receiving a heated glass sheet (22) to be bent therebetween. At least one of the bending platens (24) is deformable and includes an actuator (32) for deforming the platens from a planar shape to a bent shape to bend the heated glass sheet. Said one platen (24) includes quench openings (42) that move with said platen during the deformation of the platen and subsequently supply quenching gas to temper the bent glass sheet (22).

Abstract: In glass enamel coating compositions containing a glass frit system and a vehicle therefor, the improvement comprising the presence therein of iron, aluminum, zinc and tin sulfides or sulfates as an anti-stick agent; the resulting coatings being effective for application to glass sheets which are subsequently subjected to high temperature forming procedures.

Abstract: A method of manufacturing taxidermic glass eyes and the like utilizes flat sheets of glass. This glass is printed with the markings and coloring for the eye image. The printing is accomplished by silk screening or other production methods. The eye is then shaped by heating the glass to a plastic state while being positioned over an opening. The heated glass slumps to form the eye shape. Excess material is trimmed away once the glass has cooled. A double wall, parabolic curve taxidermic eye is thereby provided.

Abstract: A process for the batchwise production of glass performs melting, refining and discharging steps in electrically heated identical vessels, wherein at least the refining step is conducted during rotation of a vessel, and discharging of the refined glass takes place while the vessel is at rest. By using several vessels, which are either mobile or which are connected with one another by movable spouts, feeding of molten glass to a distributing channel for further processing is done continuously. Vessels according to the invention have electrodes for heating purposes; outlet port sealing arrangements; and ports for applying over-pressure or a vacuum to control glass exit speed. Blast pipes may be disposed in proximity with outlet ports in order to improve flow of the glass melt by introducing blasts of an inert gas.

Abstract: A heated glass plate is bent by moving over a bed or rollers defining a path curved along the direction of movement of the glass plate so as to define an upwardly facing concavity. The glass plate moves with a speed of at least 10 cm/second and is curved by the bed without contact from above. The glass plate is subsequently tempered.

Abstract: The method of the present invention consists of the steps of heating an area along the length of a small diameter glass tube while the tube is being rotated, pulling the heated tube using an unidirectional force to rapidly extend the heated area while mechanically maintaining the heat source centrally located along the portion of the tubing being extended. The extended tubing is subsequently cooled and separated at the narrowed portion to produce two capillary tubes. The apparatus of the present invention consists of two independently rotatable, co-axially aligned chucks. The chucks rotate in an essentially simultaneous manner, that is, the speed of rotation of each chuck is essentially the same. Each of the chucks has an adjustable collet thereon adapted to receive and hold a section of glass tubing aligned therebetween. A means of moving one of said chucks away from the other is provided. A moveable heating means is positioned intermediate the chucks.

Abstract: In a method of making glass or the like, wherein the batch materials are liquefied in a distinct zone from the refiner, the liquefied material is heated in an intermediate stage before being fed to the refiner, and a composite barrier of a cooled frame with graphite inserts is employed to restrict passage of material from the intermediate stage.

Abstract: The invention relates to a method of carrying glass sheets during heating and tempering as well as to a tempering apparatus for glass sheets, in which the method is applied. During heating, glass sheets are oscillated in a furnace (2) back and forth in a manner that the traveling distance forward on at least some of the reciprocating strokes is longer than the traveling distance backwards, whereby the transportation of each load of glass sheets from the upstream end of a furnace to the downstream end of a furnace occurs by means of the combined effect of several forward-directed long strokes. Shifting of a load of glass sheets from furnace into tempering section is effected by extending the forward-directed stroke of a load of glass sheets at the downstream end of said furnace while at the same time other loads of glass sheets in the furnace reverse for a backwards-directed stroke.