Plate glass manufacturing process

ca. 1930

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Plate glass manufacturing process
  • Title
  • Plate glass manufacturing process
  • Creator
  • PPG Industries
  • Date
  • ca. 1930
  • Identifier
  • 20170227-hpichswp-0030
  • Description
  • Flow chart demonstrating the plate glass manufacturing process used by the Pittsburgh Plate Glass Company. As is depicted, molten glass is extracted from the tank through a set of rollers. Once rolled, the glass ribbon is gradually cooled in the annealing lehr. Once the glass ribbon passes through the initial inspection booth, it is cut and snapped into sheets. The sheets of glass are then either transported to bulk storage or conveyed to the grinding and polishing lines. Specialized machines grind and polish both sides of the glass sheets in order to enhance the optical quality of the glass. Once the grinding and polishing is complete, the sheets of glass are then further inspected and cut down to meet order specifications before being shipped out.
  • Type
  • still image
  • Genre
  • photographs
  • Subject
  • PPG Industries.
    Glass manufacture.
    Glassworkers.
  • Source
  • PPG Industries Records, 1888-1995, MSS 667, Detre Library and Archives, Senator John Heinz History Center
  • Contributor
  • Detre Library & Archives, Heinz History Center
  • Collection
  • PPG Industries Records
  • Rights Information
  • Copyright Not Evaluated. The copyright and related rights status of this Item has not been evaluated. Please refer to the organization that has made the Item available for more information. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use.
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