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AssigneeHoya Corporation
InventorsAkira Murakami, Katsumi Utsugi, Yoshinori Iguchi, Masahiro Yoshida, Yoshikane Shinkuma, Atsushi Watabe
Estimating the term…
A process for stably and efficiently producing quality glass articles such as preforms at high yields, and a process for producing an optical device from the preform obtained by the above process. In the process for producing a glass article, molten glass gobs having a predetermined weight each are poured, or molten glass drops having a predetermined weight each are dropped through a nozzle, into a boiling liquid having a boiling point lower than the class transition temperature of the glass constituting said glass article or a liquid which is temperature-adjusted beforehand so as to be caused to boil by the amount of heat of the glass, to form glass articles.
A process for the production of a glass article from a molten glass, which comprises putting a molten glass gob formed of a predetermined amount of molten glass having a predetermined weight taken from a molten glass, into a boiling liquid having a boiling point lower than the glass transition temperature of the glass constituting said glass article or a liquid which is temperature-adjusted beforehand so as to be caused to boil by the amount of heat of the glass, to form a glass article having a weight equivalent to said weight, and taking out the glass article.
A process for the production of a glass article by molding a glass in a softened state, which comprises press-molding a glass in a soften state to form a glass molded article then cooling said glass molded article in a boiling liquid having a boiling point lower than the glass transition temperature of the glass constituting said glass molded article or a liquid which is temperature-adjusted beforehand so as to be caused to boil by the amount of heat of the glass.
A process for the production of a press-molding preform by dropping molten glass, which comprises dropping a molten glass having a predetermined weight from a nozzle, receiving the dropped glass with a liquefied medium obtained by cooling and liquefying a substance that exhibits a gaseous phase state at room temperature under atmospheric pressure, to form a preform having a weight equivalent to said weight, and taking out the preform.
A process for the production of a glass article from a molten glass, which comprises receiving a forward end portion of flow of the molten glass flowing out from a nozzle on a support member, then, cutting or separating the molten glass between the nozzle and the support member, to take the molten glass gob having a predetermined weight, and
A process for the production of a press-molding perform by shaping the press-molding perform from a molten glass, which comprises receiving a forward end portion of flow of the molten glass flowing out from a nozzle on a support member, then, cutting or separating the molten glass between the nozzle and the support member, to take the molten glass gob having a predetermined weight, receiving said molten glass gob with a liquefied medium obtained by cooling and liquefying a substance that exhibits a gaseous phase state at room temperature under atmospheric pressure, to form the preform having a weight equivalent to said weight, and taking out the preform.
Dependencies are inferred from the claim text.