Ppg Industries, Inc.

Stephen J Jursa

Thomas J Reese

Melvin W Tobin

Dean L Thomas

James R Mortimer

This invention relates to a stop adapted for attachment to outline molds of different outline configurations defining shapes of different depths of bend desired for glass sheets to be shaped to different patterns. The stop comprises a glass engaging member of disc-like configuration having a front surface oriented to face an edge surface of a glass sheet to be mounted in engaging relation to said front surface when loaded onto a selected one of said outline molds. The glass engaging member of disc-like configuration is supported in eccentric relation to a rod supported in fixed relation relative to a localized portion of an upwardly facing shaping surface defined by a shaping rail of said selected outline mold. When the glass engaging member of disc-like configuration is rotated about an axis defined by the rod, the vertical dimension of the glass engaging member of disc-like configuration above the rod is changed to correlate with the height of stop needed to engage an edge of the glass sheet to be bent to a shape conforming to that developed by the outline mold. The present invention makes it possible to provide an inventory of identical stops for many different production patterns to be fabricated. In addition, a simple rotational adjustment often enables a stop to be continued in use rather than requiring replacement under certain circumstances when the stop becomes damaged during use.

Eccentrically mounted stop for outline molds for shaping glass sheets

A lightweight outline mold for shaping glass sheets comprising a shaping rail having low thermal inertia, tabs attaching said rail to a reinforcing frame through rods by welding said rods at points spaced from said shaping rail and using fastening means that do not require localized heat, such as rivets, to attach the shaping rail to the tabs in a manner that avoids localized heating of the shaping rail during mold fabrication that would distort the shaping rail if the latter were welded directly to the reinforcing frame.

Lightweight outline mold with low thermal inertia for shaping glass

This invention relates to a method and apparatus for bending glass sheets in pairs to a so-called double V-bend in which the glass is bent sharply across its width along two lines of sharp bending to form a pair of sharply bent longitudinal extremity portions. The gist of the invention is the application to a sectionalized mold of weighted elongated electroconductive ribbons which are unattached to any mold structure and each of which is readily applied to and removed from positions above the upper surface of the glass sheets mounted on the mold for bending in sliding superimposed relation to a pair of electrodes along lines aligned with the lines of sharp bending. The ribbons are maintained in spaced relation to the glass throughout the bending operation so as to avoid marking the glass. The mold sections terminate at locations along transverse lines aligned with and slightly below the ribbons.

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Saxonburg, PA, United States of America

Stephen J Jursa