Compressed air glass cylinders | Historic Pittsburgh

ca. 1923

Title
Compressed air glass cylinders
Creator
PPG Industries
Date
ca. 1923
Identifier
20170227-hpichswp-0049
Description
Depicted in this image are large glass cylinders formed by compressed air. Measuring about 30 feet in length, these cylinders are formed by a mechanized process that pushes compressed air through a cap in a manner that mimics the historic, hand-blown method. Once the glass reaches the desired length, large cradles are raised and adhered to the cylinders in order to safely lower them to the ground floor of the plant. This process of compressed air glass manufacturing was used by Pittsburgh Plate Glass Company until 1927-1928 when the company adopted the Pennvernon process.
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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