Schott Glaswerke

Werner Noky

Bernd Schultheis

Kurt Schaupert

Roland Leroux

Stefan Hubert

J Urgen Th Urk

A process for forming a permanently elastic adhesive connection, easily detachable in the case of disassembly, especially adhesive connections made of temperature-stable silicone compounds, between a plate made of glass, glass ceramic or a similar material, from a holding frame on which the plate rests. In particular, the process can be used to provide such an adhesive connection between a cooking surface in a recess of a working surface, wherein a sealing frame, supported by its edge, is arranged in the recess, and a holding frame connected with the sealing frame, on which the plate rests. The adhesive strength between the permanently elastic adhesive connection and the parts of the plate in contact therewith is adjusted by the use of separating agents.

Process for forming a permanently elastic adhesive connection easily

A process and apparatus are described for the production of a filter in the form of a ceramic honeycomb body monolith, starting with a blank of the honeycomb body monolith with the bilaterally open ducts. An image-recording and processing system scans the end faces of the monolith and determines the deviations of the actual geometry of the ducts to be alternatingly sealed from the geometry of an idealized honeycomb body. The image-processing system determines zones on the respective end face of the monolith which correspond, within predeterminable tolerances, to the geometry of the idealized honeycomb body, wherein zones are determined having a maximally high number of ducts. In correspondence with the determination of the aforementioned zones, a processing route is established which predetermines which one of several metering heads with a varying number of nozzles will be activated. The nozzles then inject a plugging compound into the thus-determined ducts. After sealing of the determined ducts on one end face, the monolith is turned by 180.degree. in a clamping and turning device whereupon the ducts on the second end face are sealed in a corresponding fashion, but in a pattern complementary to that on the first end face. The thus-prepared monolith is thereafter subjected to a ceramic-production process.

Apparatus for producing a filter in the form of a monolithic honeycomb

A process for frontal, alternate sealing of ducts in a ceramic honeycomb monolith includes temporarily sealing some ducts with a first, hardenable viscous composition; permanently sealing the then still vacant duct openings with a second hardenable, viscous composition. The first composition is removed during the course of hardening the second composition. The ceramic honeycomb monolith is for exhaust gas cleaning systems of internal combustion engines.

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Mainz-Gonsenheim, Germany

Werner Noky