Ppg Industries, Inc.

Robert Gagne

Yih-Wan Tsai

Joseph A Gulotta

Thomas R Trevorrow

An apparatus for monitoring a negative pressure atmosphere, e.g. a regenerative furnace atmosphere during an exhaust cycle, has aspirating facilities for aspirating an atmospheric sample from the negative pressure atmosphere and moving the sample past an analyzer for content analysis thereof.

Method of and apparatus for analyzing atmosphere of a furnace

Pneumatic control of flow patterns in regenerators is improved by the use of flow amplifier nozzles.

Enhanced pneumatic regenerator flow control

Regenerator packing members are constructed and arranged to form tapered passageways interconnecting regenerator flues to induce transverse flow of gas between flues for increased heat transfer. A preferred embodiment includes parallelepiped bricks arranged in an open basketweave pattern, with spaces between brick ends and side faces defining the tapered passageways.

Regenerator checker packing with enhanced transverse flow

A method and apparatus for the controlling of longitudinal distortion of float glass is disclosed. It is disclosed that longitudinal distortion may be reduced by asymmetric cooling beneath the molten metal bath of a float glass forming chamber.

Method and apparatus for asymmetric cooling in a glass sheet forming

A method and apparatus for reducing longitudinal distortion in float glass is disclosed. A beam or barrier having cross-hatched grooves is installed below the advancing float glass ribbon in a float glass-forming chamber. The barrier acts to divert or diffuse laterally the molten metal which is being drawn by interfacial drag with the bottom surface of the glass. The diffusion evens the heat on the undersurface of the glass and reduces glass distortion.

Method and apparatus for molten metal flow diffusion in a float glass

A method and apparatus for the formation of flat glass are disclosed. The invention involves the utilization of transversely inclined barriers in the molten metal bath of a flat glass forming chamber to create asymmetric currents in said bath.

Method and apparatus utilizing transversely inclined barriers in float

Method and apparatus for achieving other than equilibrium thickness of float glass is disclosed. The thickness of the float glass is regulated by applying a rotating, toothed cylindrical member to the upper surface of molten glass as it moves on a molten metal bath. The cylindrical member preferably has teeth in a worm arrangement and is utilized with its axis parallel to a plane normal to the glass surface and extending in the direction of the movement of the glass ribbon.

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New Kensington, PA, United States of America

Robert Gagne