National Postal Museum
Patent model of an envelope folder, gummer, and embosser
Cornelius S. Watson · January 23, 1849
Jesse K. Park and Cornelius S. Watson patented the first envelope folding machine in the United States in 1849. Little is known of the inventors or their goals. Their treadle-operated folder first glued and then creased and folded the envelopes. Park and Watson were granted patent number 6055 on January 23, 1849. The machine was never used commercially.
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