The present invention relates to a float-glass manufacturing apparatus including a float bath and a heat treatment furnace, in which the heat treatment furnace includes: a dross box including a plurality of lift-out rolls; an annealing furnace including a plurality of lehr rolls; a first partitioning part; a second partitioning part; a gas ejection nozzle; and a guide member.

The invention relates to a method for producing a glass substrate for vehicle glazing, in particular for a windscreen of a vehicle, which comprises hot forming of a borosilicate glass, wherein in a hot forming section, at least during stretching of the glass (8) in the flow direction or longitudinal direction of movement of the glass (8), an aging velocity Av of the glass (8) to be hot formed does not exceed 10 mm/s and an aging velocity Av of the glass preferably does not undershoot 3 mm/s, and also relates to glass substrates for vehicle glazing produced by such method as well as to windscreen projection devices and driver assistance systems comprising such glass substrates.

The invention relates to a method for producing a glass substrate for vehicle glazing, in particular for a windscreen of a vehicle, which comprises hot forming of a borosilicate glass, wherein in a hot forming section, at least during stretching of the glass (8) in the flow direction or longitudinal direction of movement of the glass (8), an aging velocity Av of the glass (8) to be hot formed does not exceed 10 mm/s and an aging velocity Av of the glass preferably does not undershoot 3 mm/s, and also relates to glass substrates for vehicle glazing produced by such method as well as to windscreen projection devices and driver assistance systems comprising such glass substrates.

The invention relates to a light extraction substrate having a light extraction layer. The light extraction layer includes boron, boroate, and/or borosilicate as well as nanoparticles.

The invention relates to a light extraction substrate having a light extraction layer. The light extraction layer includes boron, boroate, and/or borosilicate as well as nanoparticles.

A controller, process, and glass manufacturing apparatus can be configured to minimize defects. Embodiments can be adapted to control injection of nitrogen and/or argon and a mixture of nitrogen and hydrogen or nitrogen, hydrogen, and argon during glass float manufacturing to facilitate a pre-selected hydrogen concentration within a tin bath furnace while also minimizing glass surface defects that can be caused from tin condensation and tin bath impurity concentrations. Empirical use data can also be collected and provided to a pre-defined machine learning element of a host device to update a pre-defined control scheme of a controller for adapting the operational condition set points or other target values to account for furnace operation history and performance.

A controller, process, and glass manufacturing apparatus can be configured to minimize defects. Embodiments can be adapted to control injection of nitrogen and/or argon and a mixture of nitrogen and hydrogen or nitrogen, hydrogen, and argon during glass float manufacturing to facilitate a pre-selected hydrogen concentration within a tin bath furnace while also minimizing glass surface defects that can be caused from tin condensation and tin bath impurity concentrations. Empirical use data can also be collected and provided to a pre-defined machine learning element of a host device to update a pre-defined control scheme of a controller for adapting the operational condition set points or other target values to account for furnace operation history and performance.

A method of reducing the volume of float bath atmosphere lost from an opening in the exit end of the float bath is described. The method comprises directing a first jet of fluid having a first jet velocity followed by a second jet velocity towards a plane a conveyance for a float glass ribbon. An obstruction in the path of the first jet of fluid causes the jet to change from the second to a third jet velocity. The obstruction may be a portion of a roller positioned outside the opening or a float glass ribbon that has been formed on a surface of molten metal contained in the float bath that has subsequently been transferred through the opening. A float bath having sealing means to reduce atmosphere loss from an exit of the float bath is also described, as is an assembly useful in carrying out the aforementioned methods.

A method of reducing the volume of float bath atmosphere lost from an opening in the exit end of the float bath is described. The method comprises directing a first jet of fluid having a first jet velocity followed by a second jet velocity towards a plane a conveyance for a float glass ribbon. An obstruction in the path of the first jet of fluid causes the jet to change from the second to a third jet velocity. The obstruction may be a portion of a roller positioned outside the opening or a float glass ribbon that has been formed on a surface of molten metal contained in the float bath that has subsequently been transferred through the opening. A float bath having sealing means to reduce atmosphere loss from an exit of the float bath is also described, as is an assembly useful in carrying out the aforementioned methods.

A float glass chamber and related methods include a hot section having an atmosphere in at least the lower plenum with less than 3 percent hydrogen based on volume and a cold section having a different volume percent hydrogen.