Jenaer Glaswerk Schott & Gen.

Schott Glas

Schott Glaswerke

Schott Glass Technologies, Inc.

Roland Schnabel

Alexander Holzel

Kurt Gotter

Evelin Weiss

Kurt Schaupert

Rainer Liebald

Wolfram Beier

Stefan Hubert

Harry Engelmann

Lee M Cook

Eckart Hussmann

Patrik Schober

Karl-Heinz Mader

Ulrike Bader

Hans V Baeyer

Ulrike Beer

Alexander Hoelzel

Joerg Pohl

Winfrid Vaulont

In the method according to the invention cold or unheated hardened glass and/or glass-ceramic parts are bonded together with a metallic ductile joining material, preferably silver, copper, aluminum or an alloy of those metals, to form a brittle article. The parts to be joined in an initial unheated state are placed with the metallic ductile joining material between them in a high frequency alternating field with frequencies preferably from 100 to 500 kHz. Then the joining material is inductively heated locally to melt it by means of the alternating field and the parts are pressed together to form a sufficiently strong bond between the parts.

Brittle article comprising joined-together hardened glass and/or glass-ceramic parts and method of making same

A connection of an electrical terminal to a conductor track applied to a glass or glass ceramic plate is to be resistant to temperature change and traction and conductive. For this purpose an electrically conductive connecting element is ultrasonically welded to the composite consisting of the conductor track and plate . The connecting element extends to the terminal which is fastened to the plate

Connection of a junction to an electrical conductor track on a plate

The cooking apparatus has at least one cooking area including a glass-ceramic panel providing a cooking surface and at least one glass molded part made from glass with definite mechanical stability, such as technical glass or hardened glass. The glass molded part or parts act as an adapter for the glass-ceramic panel. In a preferred embodiment the glass-ceramic panel is bordered or enclosed by an assembly of the glass molded parts that form the adapter and protect the edges of the glass-ceramic panel. Some of the glass molded parts provide signaling and/or control panels, e.g. for residual heat. The glass molded parts replace prior art molded parts, such as eloxated aluminum and stainless steel parts, that are disadvantageously sensitive to direct mechanical surface loads.

Cooking apparatus

Protein mixtures are separated by utilizing membrane filtration. Filtration rates of at least 60%, preferably at least 70%, can be achieved when the liquid protein mixture to be separated is diluted at least tenfold, preferably twentyfold.

Process for the fractional separation of protein mixtures by means of

The invention relates to a process for producing a tubular glass membrane with wall thicknesses between 5 and 30 microns and reproducible pore sizes between 11 A and 50 A. Alkali borosilicate glass is drawn into discrete hollow tubes and immediately cooled. The tubes are thermally treated to effect a phase separation into a coherent silicon dioxide phase and a boron oxide phase rich in alkali borate. The boron oxide phase is leached out with mineral acid. The tubes can be subsequently treated to give enlarged or reduced pores, asymmetric pores and coated surfaces.

Porous glass membrane tubes

A device for diafiltration comprising a housing having an inlet, first and second outlets, a diaphragm disposed in the housing and means for sealing the diaphragm in the housing so that the material entering the inlet and not passing through the diaphragm is removed by the first outlet while the material passing through the diaphragm is removed from the housing through the second outlet characterized by the improvements of the diaphragms being formed by a plurality of capillary diaphragms arranged with the housing to require the least structural volume and each of the capillary diaphragms being an inorganic material, such as porous glass, which is chemically modified in a known manner, such as being treated with molecules including radicals, such as silane derivatives, with the functional groups.

Capillary diaphragms for use in diafiltration

Glass surfaces are modified using controlled chemical corrosion to reduce reflection for a variety of existing optical and ophthalmic silicate glass compositions containing at least 5 weight % of alkali metal, using neutral or slightly alkaline aqueous solutions (pH: 7.0-8.5) at temperatures of 20.degree.-100.degree. C. The solutions contain an electrolyte having a dissociation constant greater than 10.sup.-6 and contain a polyvalent metal ion. Selection of the proper range of the ratio of glass surface area treated to treating solution volume is critical for achieving satisfactory results for optical applications as well as for making the process simple, repeatable, and inexpensive. Using this invention, antireflective surfaces may be produced on optical devices of complex configuration with high uniformity. Such surfaces provide substantially improved performance in high energy laser systems where exposure to laser light of extremely high intensity and short duration will destroy or degrade conventionally applied coatings.

Integral anti-reflective surfaces of silicate glasses

An apparatus for a high pressure ultra-filtration of a permeate or filtrate from a crude solution characterized by a module having an inlet for the crude solution, an outlet for the crude solution, a pressure stable capillary diaphragm as the main filtration element, means holding the diaphragm in said module, the filtration element being of a structure most favorable to the flow techniques in which the capillary diaphragms are permeated from the outside toward the inside as the crude solution flows in the axial direction therealong under a flow pressure gradient, an outlet for the permeate passing into the capillary diaphragms and means for creating a flow pressure gradient on crude material being supplied to the module. Preferably, capillary diaphragms are porous glass capillaries which are secured at one end with the other end being closed and free to adjust its position in the module.

High pressure ultra-filtration system

A solar energy collecting unit is disclosed having an absorber for solar radiation comprising at least one hollow fiber having a heat-dissipating medium flowing therethrough. The hollow fibers used are preferably glass fibers, and preferably form the absorbing surface of the collecting unit.

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Hofheim, Germany

Roland Schnabel