oversize control screen
oversize control screen[′ō·vər‚sīz kən′trōl ‚skrēn]
A screen used to prevent the entry into a machine of coarse particles which might interfere with its operation. Also known as check screen; guard screen.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.