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:
Sep. 23, 2003
Filed:
Dec. 14, 2001
Asahi Techno Glass Corporation, Chiba, JP;
Abstract
A cylindrical silver-activated phosphate glass base material is placed inside a heater The upper end of this base material is set in a supporting section and an extending section provided in vertically movable fashion by means of a drive device is attached to the lower end thereof. As the base material is softened by the heating of the heater and the extending section is lowered by operating the drive device, the base material is extended and assumes a thin bar shape. The extension rate of the extending section driven by the drive device is controlled by an external diameter control section while detecting the external diameter, in such a manner that the external diameter of the extended portion is uniform. The extended portion of the base material is cut to uniform lengths, and the cut faces thereof are polished by a polishing device, thereby yielding a cylindrical dosimeter glass element