Manufacture of flat glass
AssigneeCorning Glass Works
InventorGeorge C. Shay
Life of this patent
Estimating the term…
Abstract
A sheet of molten glass issuing from an overflow channel is supplied to the molten metal bath used in the formation of float glass. The overflow channel is positioned adjacent one end of such bath transversely of the longitudinal extent thereof, and the overflow channel is fed at one end thereof with homogeneous glass which has been thoroughly stirred and homogenized within a forehearth immediately adjacent the inlet end of such overflow channel, so that the resulting sheet may be attenuated without detrimental surface streak or ridges due to internal striae or cord which detrimentally affect the optical quality of the sheet.
Claims10
A method of delivering a sheet of substantially homogeneous molten glass to the surface of a bath of molten metal for producing float glass which comprises, delivering molten glass to a relatively narrow conditioning channel, flowing said molten glass longitudinally through said channel while simultaneously stirring such glass and producing a substantially homogeneous glass consistency, delivering said stirred and homogeneous glass to the inlet end of an overflow channel having opposed sidewalls, flowing such glass longitudinally along such channel and simultaneously overflowing at least one of said sidewalls and forming a downward flowing sheet-like flow of molten glass, and depositing said sheet of substantially homogeneous molten glass on the surface of a bath of molten metal for forming a ribbon of float glass.
A method of delivering a sheet of substantially homogeneous molten glass to the surface of a bath of molten metal for producing float glass which comprises, providing a longitudinally extending bath of molten metal, positioning a distributor member above and transversely of said longitudinally extending bath of molten metal, stirring and homogenizing a flow of molten glass, delivering such substantially homogeneous molten glass to an inlet end of said distributor and flowing such homogeneous glass within said distributor transversely of said longitudinally extending molten metal bath, overflowing at least one sidewall of said distributor and downwardly flowing a sheet-like flow of substantially homogeneous molten glass, and depositing such sheet of molten glass on the surface of said longitudinally extending molten metal bath for longitudinal movement therealong.
Apparatus for forming float glass which comprises, means for retaining a longitudinally extending bath of molten metal, distributor means positioned above and transversely of said molten metal bath means, said distributor means having an inlet end positioned transversely of the longitudinal extent of said molten metal bath means, means for producing homogeneous molten glass, means for delivering said homogeneous molten glass directly from said homogeneous producing means to the inlet end of said distributor means, and channel means forming a part of said distributor means for flowing said homogeneous glass transversely of said longitudinally extending molten bath means and for overflowing a sheet of homogeneous molten glass for delivery to said molten bath means.
Dependencies are inferred from the claim text.