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mill hopper

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Last grain of powder is dumped into the mill hopper as another hatch is completely filled. Next batch is in the foreground but will not be started until the present one is completely mixed. Mixing time varies with the characteristic of the batch, both as to the number of ingredients and the speed with which they mix thoroughly into the rubber. General Tires, Akron, Ohio

Last grain of powder is dumped into the mill hopper as another hatch i...

Picryl description: Public domain image of an industrial building, factory, workshop, workers, 20th century, free to use, no copyright restrictions.

A black and white photo of a man working in a factory. Office of War Information Photograph

A black and white photo of a man working in a factory. Office of War I...

Actual size of negative is C (approximately 4 x 5 inches). Title and other information from caption card. Transfer; United States. Office of War Information. Overseas Picture Division. Washington Division; 1944... More