Job Description:

• 1) Operates plate graining machine to roughen faces of flexible sheets of zinc or aluminum metal for use in offset-photolithographic printing: Operates power shear to cut sheets of aluminum and zinc to size, and clamps them to bed of graining machine tub.

• 2) Operates hydraulic lifting and tilting mechanism attached to machine to load and unload machine with specified amount of steel or wooden balls, water, and abrasive.

• 3) Washes sediment from plates with water hose at end of graining cycle and places on conveyor for further washing under water jets and drying under heating unit.

• 4) Examines each plate with magnifier at inspection table for uniformity, size, and structure of grain.

• 5) Stacks plates in shipping crate.

• 6) Rolls out and hammers used plates to remove gripper marks, dents, and bent corners.

• 7) Lubricates machine and replaces worn bearings.

• 8) May grain plates by wet or dry sandblasting.

• 9) May feed plates through graining machine having reel-type nylon brush which roughens surface with abrasive and water.

• 10) May grain plates with glass marbles.