A professional who sets up, adjusts, and maintains battery of automatic machines that make envelopes from die-cut blanks or rolls of paper. Responsibilities include:

• Installs gears, plungers, and rollers onto machine and turns setscrews to adjust feeding, folding, gumming, sealing, and glassine applying mechanisms according to type and size of envelopes being made, using handtools.
• Operates machine for trial run and measures dimensions of first piece with rule to ensure conformance to specifications.
• Observes operation of machines to detect malfunction.
• Disassembles machines to repair or replace broken or worn parts, using handtools or power tools.