A professional who tends machine that trims excess welting material from inside edge of hat body or brim. Responsibilities include:

• Turns screws to adjust depth of cut of machine blade, using screwdriver.
• Positions edge of hat body or brim against machine guide and pulls lever to lower presser foot onto material.
• Depresses pedal to start machine that cuts inside welt of hat body or brim.
• Removes cut welt from inside edge of hat body.