Tend machines that round edges of pearl button blanks.
What does a Convex Grinder Operator do?
Tends machine that rounds edges of pearl button blanks and forms convex surface on back of blank: Places blanks face down in automatic chucks of feed mechanism that forces blanks against abrasive wheel shaped to produce convex surface. May tend convex-grinding machine to form studs on backs of buttons, or to shape button faces. May place single blank in chuck of manually controlled convexing machine and pull on leverage bar to force blank against abrasive wheel.