Crust breaking machine at Permanente, Bill Gorman. A specialized machine has been manufactured to perform the work that had previously been done manually. A crust would form at the openings to the reduction pots where alumina was melted into raw pig aluminum. The plant had two potlines containing 240 reduction pots producing 41 million pounds of alumium per year. (Permanente Metals Corp. 1947-1948 Annual Report)

Permanente Metals Corp. (Tacoma); Aluminum industry--Tacoma--1940-1950; Machinery;

Crust breaking machine at Permanente, Bill Gorman. Workmen are using a new machine to break the crust that developed on the molten aluminum in the reduction pots at the Permanente aluminum plant. This had been a manual process before development of the specialized machine.

Permanente Metals Corp. (Tacoma)--Employees; Aluminum industry--Tacoma--1940-1950; Laborers--Tacoma--1940-1950; Machinery;

Interior at plant, Permanente Metals, Ted Schmidt. Interior view of the pot room, laborers are pouring the molten aluminum into a mold to form pigs. Pigs will weigh between fifty and one thousand pounds. The pigs are cooled, stacked on pallets and transported to the rolling mill at Trentwood, located near Spokane, Washington. The pigs from the Mead and Tacoma plant are later re-melted in furnaces where other metallic elements are added to form standard alloys (PMC Annual Report, 1947-1948).

Aluminum industry--Tacoma--1940-1950; Aluminum; Industrial facilities--Tacoma; Laborers--Tacoma; Permanente Metals Corp. (Tacoma)--Employees;