A professional who operates battery of machines that insert and glue cork, paper, plastic or aluminum foil in bottlecap shells. Responsibilities include:

• Installs punches and dies in crown assembly machines and adjusts stroke of punches that force lining material into caps.
• Turns adjustment screws to regulate feed mechanism, rate of glue flow, and heating flame.
• Starts machine and examines sample caps to verify conformance to specifications.
• Observes operation of machine to detect and diagnose cause of faulty operations.
• Disassembles machine and replaces broken or worn parts, using handtools.
• May repair machine conveyor belts.