METHOD FOR THE PRODUCTION OF A CLOSURE OF A HOLLOW AREA IN A GLASS TUBE

摘要

The invention relates to a method for the production of a closure of a hollow area (12) of a glass tube (10), wherein filling materials are disposed in said hollow area (14) at a pressure which is greater than atmospheric pressure. The glass tube (10) is arranged in a working chamber (30) wherein a higher pressure than that prevailing in the hollow area is created. A heating device (50) which is arranged in the working chamber (30) surrounds the glass tube (10) in a section which is adjacent to the hollow area (12) at least on one side and which is used to enable the section (16) to be melted and to be constricted in a melted state by the pressure prevailing in the working chamber (30); whereby the hollow area (12) is closed on at least one side. Preferably, the glass tube (10) forms the burner of a discharge lamp and is especially used in motor vehicle headlights.