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.
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The Basics of Paper Weights
When it comes to mailing, envelope weight isn’t just about grams or ounces—it’s about meeting USPS requirements and keeping costs in check. Understanding how paper basis weight and thickness are…
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