The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 30, 1987
Filed:
May. 21, 1986
Dieter Ross, Hosbach-Feldkahl, DE;
Hans-Ulrich Bonewitz, Hammersbach, DE;
Uwe Christiansen, Gelnhausen, DE;
Karl-Friedrich Klein, Bruchkobel, DE;
Albert Muhlich, Frankfurt, DE;
Karlheinz Rau, Hanau, DE;
Wolfgang Ruffing, Ottweiler, DE;
Fritz Simmat, Gelnhausen, DE;
Anton Steinkohl, Grundau, DE;
Ralf Takke, Hanau, DE;
Heraeus Quarzschmelze GmbH, Hanau, DE;
Abstract
Disclosed is a method for the axial building up, in a vertical arrangement, of a hollow cylindrical soot body having no internal support and consisting substantially of silicon dioxide by means of at least one flame hydrolysis build-up burner serving for the soot production. In this method the soot is deposited at the beginning of the build-up onto an auxiliary body, and during the build-up the build-up burner and the growing soot body are rotated relative to one another, and the burner is at the same time held at an unvarying distance from the growing end of the hollow cylinder and centrally above the predetermined cross section of the upwardly growing end of the cylinder wall. The penetration of soot into the interior of the cylinder is prevented by means of a directed gas stream.