Glass manufacturing – Processes – With measuring – sensing – inspecting – indicating – or testing
Patent
1984-12-14
1986-05-27
Kellogg, Arthur
Glass manufacturing
Processes
With measuring, sensing, inspecting, indicating, or testing
65102, 65104, 65106, C03B 2300
Patent
active
045913730
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.
REFERENCES:
patent: 4435200 (1984-03-01), Joormann et al.
patent: 4481023 (1984-11-01), Marechal et al.
Kabushiki Kaisha Ohara Kogaku Garasu Seizosho
Kellogg Arthur
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