A professional who tends machine that inserts and tamps washers and affixes cover to dry-cell containers (cans). Responsibilities include:

• Inserts washers and dumps caps into feeding mechanisms.
• Starts machine and observes mirror to inspect units passing on conveyor to ensure washers are at prescribed depth.
• Inspects capped cells for defects and offcenter carbon rods.
• Adjusts machine for changes in size of cans or to correct malfunction, using handtools.
• May tend machine equipped with device that cuts (punches) paper washers from tape, inserts washer, and affixes cap to can.