William J. Brown was a key figure in the invention and manufacture of the Acme Stapler. His patents date to the 1880's and some of his eariler machines are still found today.
The Stapling machines produced by the Acme Stapling Company were made of cast iron. Staplers were loaded from the rear of the machine. The design was typical of the 19th century design. The staples were loose wires mounted on cardboard or metal cores. They were driven forward by a cannon type spring.
Acme advertised that its machine was "especially adapted for office work and its usefulness is not at all confined to any one class of customer. In fact the lawyer, the tailor, and the munitions maker - all need to use the Acme Stapler."