Abstract: An arrangement of a one-piece molded part made of glass ceramic, glass or ceramic is used as the cooking surface of a cooking unit in a cutout of a sill plate. The molded part has an elevated, encircling outer peripheral region that is different from the level of the inner main level of the one-piece molded part, in which at least one cooking zone is located. The one-piece molded part is inserted substantially flush into the cutout of the sill plate or is laid by means of its encircling peripheral area on the edge of the cutout of the sill plate.

Abstract: The invention relates to a plate of glass ceramic suitable as component of a cooking appliance with at least one region of the one-piece plate deviating from the main plane of the plate.

Abstract: A method and an apparatus for dividing a flat glass panel (14) are described. The panel (14) which is to be divided and which is raised away from its substrate is securely held in its part regions by two clamping devices (10, 12) which are pivoted in opposite directions about a common pivot axle (4) and thus exert on the panel (14) a bending resulting in breakage along the score line (30). Simultaneously exerted on the clamping devices (10) which are, moreover, arranged to be displaceable in the direction of their connection line is a force which presses the clamping devices apart and which at the moment of breakage of the glass panel results in the two part panels moving apart, so that the broken edges cannot strike against one another. The part panels can be deposited again on a substrate after breaking. The invention further provides for marginal strips to be broken off the panel (14) to be divided, in the raised state thereof directly before dividing.

Abstract: In a process for heating an object made of thermoplastic material along a predetermined zone, a ring of burners arranged in series is guided along the zone and heats this zone, the zone forming a closed path and approximately matching the outer contour of the object; in a device for implementing the process, series-arranged burner units circulate on a path covering the zone to be heated, the units being guided along a closed loop.

Abstract: For the manufacture of formed parts made of glass, as for example, grill gratings or grease pans for kitchenstoves, a piece of plate glass that is cut to size is placed on a mold which corresponds to the shape of the desired piece of glass; and is heated. In order to prevent a premature lowering of the softening piece of plate glass, during the softening process, it is supported by a gas cushion.