A short dictionary entry describing the hat press, a machine that uses pressure inside a hat to expand it against a heated mold. It describes Osterheld & Eickemeyer's press, with an india-rubber die, a steam-heated bed-plate, a brass mold and a toggle-lever plunger, and notes the 3 to 5 minute pressing time. An engraved illustration (Fig. 1828) accompanies the text.