A worker who operates a calender machine to smooth and gloss textiles, paper, or other materials.
From calender (the verb/machine) plus the agent suffix -er, forming a noun for the person operating the equipment.
Calenderers had to have incredible skill and judgment—pressing material just enough to make it perfect without damaging it was an art form that commanded good wages in textile mills.
Complete word intelligence in one call. Free tier — 50 lookups/day.