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. 17, 2008
Filed:
Dec. 18, 2001
Gerhard Kotulla, Hanau, DE;
Klaus Ruppert, Maintal, DE;
Gerhard Kotulla, Hanau, DE;
Klaus Ruppert, Maintal, DE;
Heraeus Quarzglas GmbH & Co. KG, Hanau, DE;
Abstract
The invention relates to a method for producing a silica glass tube which is characterized by depositing SiOparticles on an elongate support that rotates about its longitudinal axis, thereby producing a porous with a cylindrical inner bore. Said blank is vertically aligned, suspended in a furnace using a suspension that engages with a constriction in the upper zone of the inner bore of the blank, and vitrified. The aim of the invention is to provided a method with which also heavy blanks can be secured safely and substantially without any danger of contaminations of the inner bore without using complicated securing devices. To this end, the constriction () is generated by shaping the inner bore () when the SiOparticles are deposited. For vitrification a suspension () is used that supports itself on the constriction () and that otherwise projects into the cylindrical inner bore () without having any contact therewith.