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. 04, 2001
Filed:
Jan. 19, 1999
Jukka Vehmas, Tampere, FI;
Uniglass Engineering Oy, Tampere, FI;
Abstract
A method and an apparatus for heating glass sheets in a tempering furnace. The tempering furnace (,) includes rollers (,) for conveying and oscillating the glass sheets (,) during heating, and resistors (,) for heating the glass sheets (,) from above and from below. The lower part of the tempering furnace (,) is cooled at the initial stage of the heating period, and the lower surfaces of the glass sheets (,) are heated at the final stage of the heating period by forced convection. This ensures good control over heat equalization in the tempering furnace (,), increases furnace power, prevents curving of the glass sheets (,), and also reduces heat shock from ceramic rollers at the initial heating stage.