Abstract: A glass or glass ceramic cooking top 1 has on its underside 6 at least one heating unit 7. The heating unit 7 is in flat, heat-conducting contact with the underside 6, and contains an electrical resistance heating element exhibiting PTC behavior, the temperature in zone 3 being limited to a desired value without the use of a temperature limiter.

Abstract: A heat-resistant baking and serving dish 1 made of glass or glass ceramic 1 has edges 3, 4 on two opposite sides, the distance A between the edges corresponding to the distance K between supports 10, 11 in a refrigerator 7, so that the dish 1 can be slid on the edges 3, 4 onto the supports 10, 11.

Abstract: A glass or glass ceramic cooking top 1 has on its underside 6 at least one heating unit 7. The heating unit 7 is in flat, heat-conducting contact with the underside 6, and contains an electrical resistance heating element exhibiting PTC behavior, the temperature in zone 3 being limited to a desired value without the use of a temperature limiter.

Abstract: While avoiding the disadvantages of the screen printing technique employed until now, the invention provides a shaping tool (1) with a structured surface for creating structures on glass (2) which, in an economical way, makes it possible to form high-precision microstructures by local heating of the region of glass to be structured. The shaping tool (1) has a rolling cylinder (3) including a metal hollow cylinder (7) and a shaping sheet (8) secured in a surface contact to it, as well as a continuous shaft (5) for continuously driving the rolling cylinder (3) via drivers (4) coupled to the hollow cylinder (7). Between the shaft (5) and the hollow cylinder (7), an electric heater (6) for targeted local heating of the glass during structuring is disposed in an electrically insulated fashion. The electric heater (6) is advantageously thermally insulated from the shaft (5) with a ceramic cylinder (14).

Abstract: A method of bonding a heating element onto the back of a glass or glass-ceramic material is provided. The heating element is bonded to the back of the glass or glass-ceramic material using a suitable adhesive material, such as an adhesive tape, RTV silicone, or a similar temperature resistant, chemically inert material. A burner unit formed from a glass or glass-ceramic material having a desired shape with the heating element connected to it with a heat resistant adhesive can be formed by this method. This allows greater freedom of design of burners to have any desired shape, as well as providing a strong, easily cleanable surface.