Ppg Industries, Inc.

Donald A Mackey

Donald P Michelotti

Kenneth J McGuire

Gary V Cannon

Dennis J Korber

An alignment device is provided with stop members that are rotatably supported on a block member in a manner such that said stop members contact the edge of the sheet along the axis about which the stop members rotate.

Zero diameter locator post

The glass sheet processing apparatus includes a sheet support stand which rotates the glass about a vertical axis and cutting and edging tools that move along linear axes generally perpendicular to the vertical axis. As the glass is rotated, the cutting tool moves towards and away the support stand to score the desired outline configuration of the glass part. The undesired trim portion of the glass is then removed. The glass sheet is then rotated and the edging tool is moved towards and away from the support stand to grind the periphery of the glass part to its final finished edge.

Method and apparatus for processing glass sheets

The load applied to a scoring wheel to the combined load of a first predetermined constant load and a second variable load. The second load is varied in response to changes in the scoring speed to provide a uniform scoring depth.

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Pittsburgh, PA, United States of America

Donald A Mackey