Ppg Industries, Inc.

Richard V Posney

Robert G Frank

George R Claassen

Rudy Canonaco

James H Schwartz

Rudolph A Karlo

Thomas L Waterloo

A lightweight vacuum pickup is constructed using a honeycomb platen as the sheet engaging member of the pickup. The cells of the honeycomb platen are selectively sealed to control the amount of vacuum drawn through the platen. When used to transfer heat softened glass sheets, the lower sheet engaging surface of the platen is sealed with a dense material cloth which restricts airflow therethrough. The cloth includes holes positioned within the periphery of the glass sheet to be engaged by the pickup.

Lightweight vacuum shuttle

An extended surface pressing mold for a horizontal press bending arrangement. The lower mold provides a glass sheet engaging surface having a first portion which complements and generally parallels a first portion of an upper sheet engaging surface of an aligned upper mold, a wing portion which extends from the first portion of lower mold and is nonparallel to a corresponding second aligned portion of the sheet engaging surface of the upper mold, and a ring portion positioned outwardly from the wing portion and generally complementing a third aligned portion of the upper sheet engaging surface of the upper mold near a portion of the perimeter of the glass sheet. The ring portion moves from the first position wherein the ring portion is in a non-engaging position relative to the heat softened glass sheet to a second position wherein the ring portion contacts and engages a perimeter portion of the heat softened glass sheet to press the perimeter portion against the third portion of the upper mold.

Extended surface pressing mold and method of sheet shaping

This invention relates to shaping glass sheets and particularly to a mold capable of shaping glass sheets having many different outline shapes but bent to the same radius of curvature. Such molds have dimensions larger than those of a family of windows of a given radius of curvature but different outline shapes. Such molds comprise a solid block of refractory material comprising a plurality of smooth, curved, upwardly facing, elongated shaping members extending continuously across an entire dimension of said mold and separated by transversely extending grooves that extend completely across the entire dimension of the shaping mold and have sufficient width and depth to permit clearance for raising the mold above a horizontal path of glass sheet travel defined by glass conveying elements.

Slotted glass sheet shaping mold

This invention relates to shaping glass sheets and particularly to a mold capable of shaping glass sheets having many different outline shapes but bent to the same radius of curvature. Such molds have dimensions larger than those of a family of windows of a given radius of curvature but different outline shapes. Such molds need not be removed or replaced until such time as production requirements call for bent windows having a different radius of curvature. A specific embodiment of this invention is provided with a series of transversely extending grooves that extend completely across the entire width of the shaping mold and have sufficient width and depth to permit clearance for raising the mold above a horizontal path of glass sheet travel defined by spaced conveyor rolls. The grooves have a maximum width of one inch (25.4 millimeters) and are separated by a minimum distance approximating the width of said grooves. The shaping mold is preferably constructed of an alumino-silica cement with a smooth upper shaping surface that does not mar hot glass sheets.

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Freeport, PA, United States of America

Richard V Posney