Back to results
US 5,683,482 AGranted
Device and method for shaping rods, especially of glassy material
AssigneeCorning Incorporated
InventorAllan Mark Fredholm
Life of this patent
Estimating the term…
Abstract
A device for shaping rods, in particular, of a glassy material, by casting said material in a molten state in a mold, characterized by the fact that said mold comprises a) a cylindrical internal wall of a porous material and b) a means to inject a gas in this wall and cause it to come out of the wall on the side facing the glassy material accumulated in the mold, so as to constitute an interstitial flow of a film of gas that separates the glassy material from the inside wall of the mold.
Claims17
A device for shaping molten glassy material into rods, the device comprising:
- (a) a mold having a vertical axis and a fixed cross-section, the mold comprising
- i) a cylindrical internal wall of a porous material, and
- ii) means connected to said wall for injecting a gas into said wall to cause said gas to come out of the wall on the side facing the glassy material accumulated in the mold, so as to constitute an interstitial flow of a film of gas that separates the glassy material from the inside wall of the mold;
- (b) a casting tube centered above the vertical axis of the mold, for feeding said molten glassy material into said mold;
- and
- (c) a free fall zone separating the casting tube from the mold.
3 more elements
A method of forming a rod from molten glassy material by:
- (a) providing a glassy material in a molten state;
- and
- (b) passing said molten glassy material through a casting tube into a mold comprising
- i) a cylindrical internal wall of a porous material, and
- ii) means connected to said wall for injecting a gas into said wall to cause said gas to come out of the wall on the side facing the glassy material accumulated in the mold, so as to constitute an interstitial flow of a film of gas that separates the molten glassy material from the inside wall of the mold;
- wherein said mold is characterized by having a vertical axis and a fixed cross-section, and wherein the casting tube is centered above the vertical axis of the mold, and separated from said mold by a free fall zone.
3 more elements
Dependencies are inferred from the claim text.