Ppg Industries, Inc.

Fred A Fortunato

Helmut Franz

Barry L Shadle

The present invention discloses a method of reducing marking of a heat softened glass sheet which results when portions of the sheet are contacted by glass sheet handling equipment. The portions of the sheet susceptible to marking are sprayed with an inert material having a melting point and decomposition temperature of at least 1200.degree. F. to form a layer that protects the sheet portion against marking from the equipment. In one particular embodiment of the invention, the lower major surface of a glass sheet is sprayed with an aqueous solution of sodium sulfate to form a layer of sodium sulfate along the glass surface which protect against marking of the glass by conveyor rolls.

Method of reducing glass sheet marking

A method and composition are disclosed for applying an organic acid-containing aqueous composition to a glass surface to prevent staining thereof wherein a wetting agent is employed to provide uniform and complete wetting of the glass surface with a uniform continuous film of said organic acid-containing aqueous composition.

Method and composition for applying acidic interleaving material in

The present invention provides a multiple nozzle liquid spray assembly having a longitudinally extending bar member, receivers to allow securing of nozzles along the bar, a coolant conduit extending along at least a portion of the bar, liquid and gas conduits extending along the bar in close proximity to each of the receivers, and first and second sets of passages interconnecting each of the receivers with the liquid or gas conduits. In one particular embodiment of the invention, the coolant conduit includes a first portion which extends from a coolant inlet along a first longitudinal side of the bar member and a second portion which extends from a coolant outlet along an opposing longitudinal side of the bar member. The liquid conduit and gas conduit generally parallel each other and extend along the bar member between the first and second portions of the cooling conduit.

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Allison Park, PA, United States of America

Fred A Fortunato