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:
Mar. 23, 2010
Filed:
Jul. 18, 2004
Oliver Ganz, Bruchköbel, DE;
Rene Sowa, Pouch, DE;
Peter Bauer, Mainhausen, DE;
Norbert Cibis, Kahl am Main, DE;
Ralph Sattmann, Aschaffenburg, DE;
Jan Vydra, Hanau, DE;
Clemens Schmitt, Blankenbach, DE;
Oliver Ganz, Bruchköbel, DE;
Rene Sowa, Pouch, DE;
Peter Bauer, Mainhausen, DE;
Norbert Cibis, Kahl am Main, DE;
Ralph Sattmann, Aschaffenburg, DE;
Jan Vydra, Hanau, DE;
Clemens Schmitt, Blankenbach, DE;
Heraeus Quarzglas GmbH & Co. KG, Hanau, DE;
Abstract
The production of an optical component from quartz glass, by elongation of a coaxial arrangement of a core rod and a hollow cylinder of a given length, is known. The arrangement is thus introduced into a heating zone with a vertical orientation, such that the lower end begins to partly soften and the component is drawn downwards from the softened part. The hollow cylinder has an inner passage, provided with a restriction in the region of the lower end thereof, on which the core rod is supported. Several methods are disclosed for formation of the restriction in which the inner passage () is mechanically machined to a final dimension and, in one version of the method, the restriction in the inner passage () is generated by means of softening the lower end face of the hollow cylinder, swaged against a tool and thus folded inwards with formation of a peripheral bead ring.