Procédé de fabrication des ébauches en verre

Verfahren zur Herstellung von Glasrohlingen

Method of producing glass blank

Abstract

A method of producing a glass blank (17), comprising the steps of: supplying a desired weight of molten glass material (24) to a bearer (14) heated to a temperature of not more than a softening point of the glass material (24); performing and cancelling, at a temperature of not less than the softening point, pressing of the glass material (24) supplied to the bearer (14) so as to adjust a thickness of the glass material (24); and cooling the glass material (24) to a temperature of not more than the softening point.

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Patent Citations (5)

    Publication numberPublication dateAssigneeTitle
    DE-3924238-A1January 25, 1990Hoya CorpGlass element mfr. - prevents traces of knife cut by faster lowering of capturing mould
    EP-0378292-A1July 18, 1990Matsushita Electric Industrial Co., Ltd., Sumita Optical Glass, Inc.Method of manufacturing glass optical element
    EP-0408065-A2January 16, 1991Matsushita Electric Industrial Co., Ltd., Sumita Optical Glass, Inc.Procédé pour la production d'un élément optique en verre et appareil pour la réalisation de ce procédé
    US-2359433-AOctober 03, 1944Anchor Hocking Glass CorpTransferring machinery
    US-3930819-AJanuary 06, 1976Fabrication De Maquinas, S.A.Press molded hot glassware handling apparatus

NO-Patent Citations (2)

    Title
    PATENT ABSTRACTS OF JAPAN vol. 14, no. 143 (C-703)19 March 1990 & JP-A-2 014 839 ( HOYA CORP ) 18 January 1990
    PATENT ABSTRACTS OF JAPAN vol. 15, no. 345 (C-864)3 September 1991 & JP-A-3 137 030 ( MINOLTA CAMERA CO LTD ) 11 June 1991

Cited By (4)

    Publication numberPublication dateAssigneeTitle
    EP-0834477-A1April 08, 1998Eastman Kodak CompanyVerfahren und Vorrichtung zum Herstellen von optischen Vorformen mit bestimmten geometrischen Rändern und Vorformen in dieser Art hergestellt
    US-8003186-B2August 23, 2011Ohara Inc.Preform for optical element and optical element
    WO-2006064888-A1June 22, 2006Ohara Inc.Preform for optical element and optical element
    WO-9854102-A1December 03, 1998Schott Zwiesel AktiengesellschaftMethod for producing glass goblets, tumblers and similar hollow glasses, and corresponding device for carrying out said method