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:
May. 27, 1986
Filed:
Dec. 14, 1984
Bunryo Sato, Hachioji, JP;
Kabushiki Kaisha Ohara Kogaku Garasu Seizosho, Sagamihara, JP;
Abstract
A method is provided for molding high-precision glass products where a piece of glass is heated at least in its surface portion and pressed between a pair of molds. Relative movement of the molds toward each other during the pressing is caused to follow change in dimension of a heated interval control member provided between the pair of molds, the interval control member having a coefficient of thermal expansion which is equal to or larger than that of the glass piece and therefore being capable of thermal contraction in the pressing direction by an amount which is substantially equivalent to or larger than that of the glass piece in the pressing direction due to cooling of the glass piece, and the change in dimension of the interval control member being caused by thermal contraction due to cooling thereof.