A professional who feeds gathered signatures (pages) into machines that automatically perform in sequence such operations as rounding and backing, supering (applying strip of reinforcing material to back of book) and lining, casing-in, and pressing to convert gathered signatures into complete books. Responsibilities include:

• Jogs signatures to align edges.
• Places aligned signatures against guides of feed conveyor.
• Notifies casing-in-line setter of machine malfunction.