Abstract: A glass manufacturing apparatus including a forming apparatus having a forming body and a directly electrically heated edge director assembly attached thereto, the edge director assembly configured to direct a flow of molten glass from the forming body. The edge director assembly includes a plurality of bus bar assemblies connected thereto and configured to receive an electrical current. The electrical current may be a three-phase electrical current. The bus bar assemblies are supported by three-axis support assemblies that support movement of the bus bar assemblies along three orthogonal axes.

Abstract: Systems and methods for remediating streak in glass ribbons formed from glass forming processes are disclosed. The systems include a laser that produces a stationary laser beam having a wavelength of from about 1 ?m to about 12 ?m and a beam width less than or equal to a full width half maximum of a change in the thickness of the glass ribbon over a streak width at a streak location and optical components to condition and direct the laser beam at the streak location. The methods include forming the glass ribbon, identifying a streak in the glass ribbon, and directing the laser beam at the streak location. The laser beam heats the glass ribbon at the location of the streak, which reduces a viscosity of the glass ribbon to cause glass thinning that reduces the severity of the streak.

Abstract: A method for generating various stress profiles for chemically strengthened glass. An alkali aluminosilicate glass is brought into contact with an ion exchange media such as, for example, a molten salt bath containing an alkali metal cation that is larger than an alkali metal cation in the glass. The ion exchange is carried out at temperatures greater than about 420° C. and at least about 30° C. below the anneal point of the glass.

Abstract: A multicore optical fiber includes two or more cores, a common interior cladding surrounding the two or more cores, and a common exterior cladding surrounding the common interior cladding. The common exterior cladding has a lower relative refractive index than the common interior cladding and reduces tunneling losses from the cores. The reduced tunneling loss allows placement of cores closer to the edge of the fiber, thus providing multicore optical fibers having higher core count for a given fiber diameter. Separation between cores is controlled to minimize crosstalk.

Abstract: An apparatus for downwardly drawing a glass ribbon includes a forming vessel including an upper portion including a pair of outside surfaces and a forming wedge portion including a pair of downwardly inclined forming surfaces converging along a downstream direction to form a bottom edge. An edge director is provided that includes a flow directing portion formed from a portion of a frustoconical or conical shape.

Abstract: A glass tube manufacturing apparatus for manufacturing glass tubing includes a glass delivery tank with molten glass. The glass delivery tank has a bottom opening. A bell has an upper portion with an outer diameter located at the bottom opening. A heating apparatus is at least partially disposed around the bell. The heating apparatus includes a heated portion and a muffle portion located below the heated portion. A lower extended muffle structure extends downwardly from the muffle portion. The lower extended muffle structure extending about the glass tubing on all sides to manage convective airflow therethrough.

Abstract: Various improvements for dual-elevation edge roll system used in fused downdraw glass forming process are disclosed.

Abstract: A multicore optical fiber includes two or more cores, a common interior cladding surrounding the two or more cores, and a common exterior cladding surrounding the common interior cladding. The common exterior cladding has a lower relative refractive index than the common interior cladding and reduces tunneling losses from the cores. The reduced tunneling loss allows placement of cores closer to the edge of the fiber, thus providing multicore optical fibers having higher core count for a given fiber diameter. Separation between cores is controlled to minimize crosstalk.

Abstract: A multicore optical fiber includes two or more cores, a common interior cladding surrounding the two or more cores, and a common exterior cladding surrounding the common interior cladding. The common exterior cladding has a lower relative refractive index than the common interior cladding and reduces tunneling losses from the cores. The reduced tunneling loss allows placement of cores closer to the edge of the fiber, thus providing multicore optical fibers having higher core count for a given fiber diameter. Separation between cores is controlled to minimize crosstalk.

Abstract: Various improvements for dual-elevation edge roll system used in fused downdraw glass forming process are disclosed.

Abstract: Textured glass laminates are described along with methods of making textured glass laminates. The textured glass laminates may be formed via addition of nanoparticles or manipulation of the glass surface. Laminate compositions are designed to take advantage of glass clad and core properties at Tg, annealing point, strain point, and or softening point, along with glass clad and core viscosities. The resulting compositions are useful for anti-reflection surfaces, anti-fingerprint surfaces, anti-fogging surfaces, adhesion-promoting surfaces, friction-reducing surfaces, and the like.

Abstract: A laminated glass article has a first layer having a first ion exchange diffusivity, D0, and a second layer adjacent to the first layer and having a second ion exchange diffusivity, D1. D0/D1 is from about 1.2 to about 10, or D0/D1 is from about 0.05 to about 0.95. A method for manufacturing the laminated glass article includes forming a first layer having a first ion exchange diffusivity, D0, and forming a second layer adjacent to the first layer and having a second ion exchange diffusivity, D1. The laminated glass article can be strengthened by an ion exchange process to form a strengthened laminated glass article having a compressive stress layer with a depth of layer from about 8 ?m to about 100 ?m.

Abstract: Embodiments of glass forming apparatuses are disclosed herein. In one embodiment, a glass forming apparatus may include a forming body defining a draw plane extending from the forming body in a draw direction. An actively-cooled thermal sink may be positioned below the forming body in the draw direction and spaced apart from the draw plane. An infrared-transparent barrier may be positioned between the actively-cooled thermal sink and the draw plane. The infrared-transparent barrier may comprise an infrared-transparent wall positioned proximate the actively-cooled thermal sink or an infrared-transparent jacket positioned around the actively-cooled thermal sink.

Abstract: A method for generating various stress profiles for chemically strengthened glass. An alkali aluminosilicate glass is brought into contact with an ion exchange media such as, for example, a molten salt bath containing an alkali metal cation that is larger than an alkali metal cation in the glass. The ion exchange is carried out at temperatures greater than about 420° C. and at least about 30° C. below the anneal point of the glass.

Abstract: A multicore optical fiber includes two or more cores, a common interior cladding surrounding the two or more cores, and a common exterior cladding surrounding the common interior cladding. The common exterior cladding has a lower relative refractive index than the common interior cladding and reduces tunneling losses from the cores. The reduced tunneling loss allows placement of cores closer to the edge of the fiber, thus providing multicore optical fibers having higher core count for a given fiber diameter. Separation between cores is controlled to minimize crosstalk.

Abstract: A method for separating a glass sheet from a glass ribbon is provided in which the glass ribbon has a bead region and a quality region. The method includes scoring a score line across a surface of the quality region and applying an energy source, such as a burner or laser, to at least one surface of the bead region so as to generate a thermal gradient between the surface and the center of the bead region in the thickness direction.

Abstract: A method for generating various stress profiles for chemically strengthened glass. An alkali aluminosilicate glass is brought into contact with an ion exchange media such as, for example, a molten salt bath containing an alkali metal cation that is larger than an alkali metal cation in the glass. The ion exchange is carried out at temperatures greater than about 420° C. and at least about 30° C. below the anneal point of the glass.

Abstract: An apparatus for downwardly drawing a glass ribbon includes a forming vessel including an upper portion including a pair of outside surfaces and a forming wedge portion including a pair of downwardly inclined forming surfaces converging along a downstream direction to form a bottom edge. An edge director is provided that includes a flow directing portion formed from a portion of a frustoconical or conical shape.

Abstract: Disclosed herein are apparatuses and methods for drawing sheet glass. More particularly, one or more sets of edge rolls can be configured to have a rotation axis angled away from a line orthogonal to the direction of flow of a ribbon of glass and positioned so as to contact the glass in the viscous region of the draw. Through control over the orientation and position of the one or more sets of edge rolls, sheet width attenuation may be eliminated, thickness of the beads that form along the edges of the glass sheet may be reduced, and instabilities associated with sheet width variation may be eliminated.

Abstract: A method for generating various stress profiles for chemically strengthened glass. An alkali aluminosilicate glass is brought into contact with an ion exchange media such as, for example, a molten salt bath containing an alkali metal cation that is larger than an alkali metal cation in the glass. The ion exchange is carried out at temperatures greater than about 420° C. and at least about 30° C. below the anneal point of the glass.