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. 06, 2007
Filed:
Jul. 07, 2003
Frank Buellesfeld, Frankfurt, DE;
Paul Kissl, Mainz, DE;
Uwe Kolberg, Mainz, DE;
Volker Ohmstede, Mainz, DE;
Frank Buellesfeld, Frankfurt, DE;
Paul Kissl, Mainz, DE;
Uwe Kolberg, Mainz, DE;
Volker Ohmstede, Mainz, DE;
Schott AG, Mainz, DE;
Abstract
The double crucible for a glass drawing method has a heatable outer crucible () and an inner crucible () surrounded by the outer crucible (), which is heatable separately from the outer crucible (). Both crucibles () have an outlet nozzle () for the glass to be drawn. To make glass fibers from heavy metal oxide glass (HMO-glass) with higher quality and comparatively simple crucible features, the outlet nozzle () of the outer crucible () extends a certain distance beyond the outlet nozzle () of the inner crucible (). Surfaces of the outlet nozzles coming in contact with the glass melt are polished and are provided on a material, which has a reducing action on heavy metal glass in the melt in all cases. These surfaces also have sufficient mechanical strength for and chemical inertness to heavy metal oxide glass.