Other

Schott Glas

Schott Ag

Georg Sparschuh

Holger Wegener

Jürgen Vogt

Thomas Wiegel

Rainer Schwertfeger

Gregor Kübart

Stefan Spengler

Dieter Munkes

Angelika Ullmann

Heinz-G Bordt

Dirk Sprenger

Funnels of picture tubes are typically produced by pressing a molten gob of glass in a mold using a pressing die and by using a ring resting on the mold and resiliently secured to the die, for molding a flat funnel upper edge. At the same time, through corresponding recesses in the mold, bearing faces, so-called pads for connecting the funnel adjustably to the picture screen, are molded onto the outer collar of the funnel. In order to attain an encompassing upper edge of constant width by recessing of the pads without an encompassing mold seam on the finished funnel, the mold is provided in the region of the pads with recesses, in which movable, flat molded parts that are flush with the upper edge of the mold can be placed, the thickness of the molded parts being determined in accordance with the extent of recessing of the pads and their radial length being determined such that they produce protrude into the mold cavity in accordance with the recessed upper edge of the pads to be molded on, and are arranged such that they can be moved out of the mold cavity after the funnel has been molded.

Method for producing cones of picture tubes and device for carrying out this method

The invention relates to an apparatus intended especially for making a contactless measurement of the thickness of measurement objects made of transparent material. In the course of this measurement, two opposing beams produced by a first and second radiation source are directed through first and second beam splitters and through a deflecting device consisting of a body of transparent material having reflecting and refracting boundary surfaces. Thereafter, the beams are directed obliquely onto the surface of the object to be measured. The first and second component beams are reflected off the forward and rearward surfaces, respectively, of the object and are directed through first and second beam splitters onto first and second detecting devices. In order to facilitate a compact configuration and higher measurement precision, the first and second beam splitters define the incidence surfaces of the deflecting device facing towards the radiation sources.

Apparatus for making contactless measurements of the thickness of an

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Aspisheim, Germany

Georg Sparschuh