blanking

blanking

[′blaŋk·iŋ] (engineering) The closing off of flow through a liquid-containing process pipe by the insertion of solid disks at joints or unions; used during maintenance and repair work as a safety precaution. Also known as blinding. Cutting of plastic or metal sheets into shapes by striking with a punch. Also known as die cutting.

blanking

i. Devices other than fabric covers meant to cover air intakes and other recesses of aircraft when it is parked for any length of time. Blankings are more commonly used for covering air intakes and exhaust nozzle.
ii. In a CRT (cathode-ray tube) or an electron tube, suppression of the picture signal on flyback to make the return trace invisible by application of negative voltage to the grid of the CRT.