Automatic Paper Folders United Automatic Paper Folders United Automatic Paper Folders provide effortless automatic folding with a built-in out feed stackers for easy unloading. With United automatic folders, you can automate the process saving you hours of work by hand. United provides easy-to-use machines with digital displays, folding charts, and clearly marked folding plates. Simply load the paper that needs to be folded, set your folding plates, and press start for accurate and consistent folding. United paper folders are designed to be compact and built to last.