A professional who tends machine that removes moisture or wrinkles from felt sheets or hides. Respnsibilities include:

• Places material between rollers of machine and depresses pedal that rotates lower roller against upper roller to press moisture or smooth wrinkles from material.
• Releases pedal to separate rollers and stop machine.
• Removes material from rollers and places material on cart.
• May move controls to adjust rollers according to thickness of material.
• May be designated according to section of leather processed as belly wringer; crop-setting-out-machine operator; or according to type of leather processed as blue-leather setter; colored-leather setter.
• May sponge water on hides before rolling to ensure uniformity of moisture content and be designated Sponger.