A professional who sets up battery of automatic machines that form tin-can bodies. Respnsibilities include:

• Lights and tends gas burners under soldering vats and adjusts thermostats to regulate temperature of molten solder in machines.
• Tests air pressure of vacuum feed cups with gauge.
• Starts machine and observes operation to detect malfunctioning.
• Inspects can bodies and adjusts machine action until bodies conform with specifications.
• Adjusts machines for change to different sizes of can bodies.
• Maintains supply of bar solder in melting reservoirs and adjusts thermostat regulators to regulate flow of molten solder into machine.
• Adjusts equipment and replaces defective regulator units, using handtools.
• May repair malfunctioning machines.