169results about "Feeder spouts" patented technology

A front end for a glass forming operation including an open channel and at least one burner. The channel surface has at least one burner port and a burner oriented in the burner port at an acute angle relative to the channel surface. The surface may be a top, side or end wall and the burner port is at an acute angle relative to the surface of the wall.

An apparatus for use in direct resistance heating of a molten glass-carrying vessel, such as a finer or connecting pipe, is provided. The apparatus comprises a flange comprises a plurality of electrically-conductive rings that include an inner ring joined to the vessel's exterior wall during use of the flange and an outer ring that receives electric current during use of the flange. The innermost ring comprises a high-temperature resistant metal preferably comprising at least 80% platinum, and the outermost ring preferably comprising at least 99.0% nickel. This combination of materials both increases the reliability of the flange and reduces its cost. Either one or both of the width or thickness of one or both of the inner or outer rings varies as a function of angular position relative to the vessel. The width and / or thickness of the inner and the outer rings with relation to each other produces a uniform current distribution in the flange and the vessel.

A manufacturing method of a glass blank for magnetic disk including a pair of principal surfaces, the method including: dropping process for dropping a lump of molten glass; pressing process for forming a sheet glass material by sandwiching simultaneously the lump from both sides of the dropping path of the lump with surfaces of the pair of dies facing together, and performing press forming to the lump; and temperature adjusting process for adjusting temperature of the lump before the pressing process such that viscosity variation of the lump is reduced with respect to positions over the entirety of the lump in the pressing process.

In the method molten glass emerges from an outlet opening of a melt feed. The molten glass is drawn over a shaping body so as to form a hollow drawing bulb. According to the invention, the drawing bulb is drawn over a profile forming body positioned downstream of the shaping body so that inner circumferential surfaces of the drawing bulb are deformed while abutting against outer surfaces of the profile forming body to form the predetermined inner profile. The distance between the shaping body and the profile forming body can be changed to vary the wall thickness of the glass tube.

The invention provides a molding device and a molding method for optical glass by edge dropwise feeding. The molding device can effectively control the problems of stripes and easy devitrification of the optical glass. The molding device for optical glass by edge dropwise feeding comprises a bottom die, a bracket, a rail trolley, a heating system and a preheating system, wherein the heating system controls the space temperature of molding; the preheating system heats the bottom part of the die; the bracket is arranged on the rail trolley; the bottom die is arranged on the bracket; the molding device also comprises a frame and a plug; and the bottom die, the frame and the plug constitute the molding die of the optical glass. The molding device provided by the invention can well meet the requirements of the process needed by edge molding of heavy-caliber optical glass, has flexible operation, is convenient to assemble, disassemble and replace, effectively improves optical homogeneity and stress of the heavy-caliber optical glass, is applicable to molding of the heavy-caliber optical glass in the forms of crowns, flint, lanthanides, fluorophosphates, etc., and has good effects on solving the problem of molding of low-viscosity and easy-devitrification optical glass of lanthanides, fluorophosphates, etc.

Apparatus, which is suitable for being surrounded by molten glass, the apparatus having a shank which has at least one at least partially seamless tube consisting of an oxide dispersion-strengthened PGM material, the shank having at least one thickened portion on which an actuating device is arranged.