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:
Feb. 21, 2006
Filed:
May. 15, 2002
Erhard Dick, Pechbrunn, DE;
Erich Fischer, Mitterteich, DE;
Roland Fuchs, Mitterteich, DE;
Markus Riedl, Mitterteich, DE;
Erhard Dick, Pechbrunn, DE;
Erich Fischer, Mitterteich, DE;
Roland Fuchs, Mitterteich, DE;
Markus Riedl, Mitterteich, DE;
Schott AG, Mainz, DE;
Abstract
The sleeve-type glass melt agitator has a rotatable cylindrical sleeve provided with outwardly protruding vane elements and through-going openings in its outer cylindrical surface to stir the glass melt when the sleeve is rotated. The sleeve type agitator is arranged vertically in a glass melt feed channel in a glass melt feed system for making glass tubes or pipes according to the Vello or down-drawn process. During formation of glass tubes or pipes from the glass melt the sleeve-type agitator is rotated as the glass melt flows downward to prevent formation of schlieren in the glass melt, which causes glass material losses.