Walter Berkowitz, son of William Berkowitz, discovers a new, high-speed envelope-folding machine produced by Winkler & Dunnebier (W&D). Berkley Machinery Company was later established and Tension becomes the sole supplier of W&D machinery in the United States. The machine’s introduction revolutionizes the American envelope industry.
Home › Timeline Stories › High-speed Envelope-folding Machine Revolutionizes American Envelope Industry

By Andy Perdue
December 21, 2022
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