A professional who tends machine that glues transparent cellophane or acetate paper over precut windows in envelope or paperboard carton blanks. Responsibilities include:

• Replenishes glue reservoir and fills feed chute with precut transparent strips.
• Loads blanks in automatic feedrack and starts machine, or feeds blanks singly into machine.
• Removes jammed blanks from rollers, and inspects envelopes or cartons to detect defects in cutting and gluing.
• May tend machine equipped with roll of transparent material that cuts material into strips before gluing them to envelope or carton blanks.