Abstract: A process for the remelting of glass bars, including the steps of introducing a glass bar into an upper end of a receiving shell; providing a molten bath having a surface underneath the receiving-shell; positioning the receiving shell such that a lower edge of the receiving shell is located at the height of the surface or above it; heating a lower end of the glass bar to a temperature above a softening temperature of the glass, resulting in a melt-off process at the lower end of the glass bar to produce a melt stream; controlling the melt-off process such that the melt stream continuously enters the molten bath proximate the surface with avoidance of a constriction; and drawing off melt from the molten bath by means of an arrangement for drop generation.

Abstract: The invention relates to a device for melting or refining glass or glass ceramics. According to the invention, a device of this type is provided with the following characteristics: a plurality of tubes which are U-shaped and arrange side by side so that they form a cage like skull channel that is open on top, and a high frequency oscillation circuit which comprises an induction coil. The tubes can be connected to a cooling medium. The induction coil wraps around the channel in such a manner that winding sections extend along the lateral walls of the channel.

Abstract: A device for the melting or purifying of inorganic substances, in particular of glass, which comprises a number of metal tubes which may be attached to a cooling medium and which are arranged next to each other, in such a way that together they form a container, a high frequency coil for the injection of energy into the container contents and a plastic coating for the metal tubes, the decomposition temperature of which lies below the temperature of the melt. The cooling system is configured and arranged such that the temperature of the boundary layer of the melt, immediately surrounding the component, lies below that of the decomposition temperature of the coating material.

Abstract: The invention relates to a device for melting or refining glass or glass ceramics. According to the invention, a device of this type is provided with the following characteristics: a plurality of tubes which are U-shaped and arrange side by side so that they form a cage like skull channel that is open on top, and a high frequency oscillation circuit which comprises an induction coil. The tubes can be connected to a cooling medium. The induction coil wraps around the channel in such a manner that winding sections extend along the lateral walls of the channel.

Abstract: The present invention relates to a method and a device for crushing glass bodies, in which the glass body 18 is arranged in a microwave field 4, so that the said glass body 18 is crushed on account of the resulting thermal stresses. In addition, a local plasma 20, which results in further thermal stresses, is produced on the surface of the glass body 18. Since the glass body 18 to be crushed does not come into contact with crushing means, for example rollers or the like, the pieces of broken glass 22 cannot be contaminated by abrasion particles of the crushing means. The plasma 20 permits a rapid and economic crushing of the glass bodies.

Abstract: The invention describes a method for refining molten glass materials, in which refining gas is generated by refining agents in the molten glass, and in which the molten glass is heated to a temperature of between 1650° C. and 2800° C., and the maximum release of refining gas by the refining agents takes place at over 1500° C.

Abstract: A device and method for the plaining of glasses or glass-ceramics. The device is provided with a melting vat, at least two plaining containers serially connected after the outlet of the melting vat, and at least one of the plaining containers is built in accordance with the skull principle from a plurality of metal tubes comprising a cooling agent connection and a high-frequency device for inductively coupling high-frequency energy into the contents of the plaining container.

Abstract: According to the invention, the skull pot is provided with the following characteristics: a pot wall (1), a bottom (3) and an induction coil (9) which surrounds the pot wall (1) and by means of which high-frequency energy can be coupled into the contents of the pot. The pot wall (1) is made of a ring of metal pipes (1.1) which can be connected to a cooling medium. Slits are embodied between adjacent metal pipes (1.1). The metal pipes (1.1) are bent at a right angle at the upper ends thereof in such a way that said pipes extend towards the outside, when the pot wall (1) is viewed from above, and form a collar (2). The collar (2) is surrounded by an additional wall (upper wall 4). The upper edge of said wall is situated on a higher level than the collar (2) in such a way that the melt covers the collar (2) during operation.

Abstract: A device for the melting of highly pure optical glasses and/or for the treatment of melts is provided. The device is intended for a subsequent refining or homogenization process making use of the skull technique. The device uses a number of coated metal tubes whose surface is free of glass-coloring ions.

Abstract: The invention relates to a device for the melting or purifying of inorganic substances, in particular of glass, which comprises a number of metal tubes which may be attached to a cooling medium and which are arranged next to each other, in such a way that together they form a container, a high frequency coil for the injection of energy into the container contents and a plastic coating for the metal tubes, the decomposition temperature of which lies below the temperature of the melt. The cooling system is configured and arranged, such that the temperature of the boundary layer of the melt, immediately surrounding the component, lies beneath that of the decomposition temperature of the coating material.

Abstract: The invention relates to a device for purifying molten glass;

Abstract: There is now provided a method and a device for the control and setting of the redox state of redox fining agents in a glass melt, in which method, during the melting process, essentially oxygen gas is blown through the glass melt.

Abstract: A high-frequency device for melting and refining inorganic compounds having a high-frequency oscillation system and a crucible. The high-frequency system includes an induction coil looping around the crucible and at least two oscillator circuits connectable in parallel to the induction coil and providing redundant high frequency energy. Each self-exciting oscillator includes one of the capacitors and the induction coil. The device may further include a power supply, a control cabinet having operating units, and a process control system.

Abstract: The invention relates to a method and a device for nozzle-injection of gas into molten glass.

Abstract: The invention relates to a method for heating up and shaping a preform consisting of glass or glass ceramic.

Abstract: The invention relates to a structural component for a device for the treatment of melts, especially of glass melts;

Abstract: The present invention relates to a method and a device for crushing glass bodies, in which the glass body 18 is arranged in a microwave field 4, so that the said glass body 18 is crushed on account of the resulting thermal stresses. In addition, a local plasma 20, which results in further thermal stresses, is produced on the surface of the glass body 18. Since the glass body 18 to be crushed does not come into contact with crushing means, for example rollers or the like, the pieces of broken glass 22 cannot be contaminated by abrasion particles of the crushing means. The plasma 20 permits a rapid and economic crushing of the glass bodies.

Abstract: The invention relates to a process for the production of a glass melt.