Tempering glass sheets with liquid flows
Abstract
Abstract THERMAL TREATMET OF GLASS SHEETS, PARTICULARLY TO IMPART A CONTROLLED THERMAL TEMPER THAT IS APPROXIMATELY UNCHANGING FROM SHEET TO SHEET, ON A HIGH SPEED, MASS PRDUCTION BASIS IN SUCH A MANNER THAT EACH GLASS SHEET SO TREATED HAS ACCEPTABLE OPTICAL PROPERTIES. THE PRESENT INVENTION OBTAINS THIS DESIRED RESULT BY A SO-CALLED FLOOD QUENCHING, WHICH COMPRISES APPLYING A PLURALITY OF CONTINUOUS OR APPROXIMATELY CONTINUOUS FLOWS OF A LIQUID SELECTED FOR ITS HEAT EXCHANGE PROPERTIES ACROSS THE ENTIRE SURFACE OF THE SHEET AND REMOVING THE FLOWS OF LIQUID FROM CONTACT WITH THE SHEET AFTER THE LIQUID HAS MOVED ACROSS THE SURFACE OF THE SHEET AND HAS COOLED THE SHEET SUFFICIENTLY TO IMPART A THERMAL TEMPER OF THE DESIRED MAGNITUDE. A NOVEL TYPE OF GLASS GRIPPING TONGS ISPROVIDED TO MINIMIZE ANY INTERFERENCE WITH FREE MOVEMENT OF THE LIQUID FLOWS THAT WOULD BE EXPECTED FROM USING TONGS. MEANS IS PROVIDED TO AVOID TOP EDGE BREAKAGE AND MEANS IS PROVIDED TO MINIMIZE BUBBLES ENTRAPPED WITHIN THE TEMPERING LIQUID WHEN THE LATTER IS APPLIED TO A GLASS SURFACE. D R A W I N G
Inventors
- 👤 L Sperry
Bibliographic Details
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