Process Control Wins Blender Patent Fight.A dispute over gravimetric gravimetric /grav·i·met·ric/ (grav?i-me´trik) pertaining to measurement by weight; performed by weight, as a gravimetric method of drug assay. grav·i·met·ric adj. 1. blender controls was resolved recently when Process Control Corp., Atlanta, won a patent appeal against AEC/HydReclaim Corp., Fenton, Mich. The U.S. Circuit Court of Appeals in Washington, D.C., invalidated in·val·i·date tr.v. in·val·i·dat·ed, in·val·i·dat·ing, in·val·i·dates To make invalid; nullify. in·val HydReclaim's U.S. Patent # 5148943 and overturned a 1997 finding by the U.S. District Court in Atlanta that Process Control had infringed HydReclaim's patent. The court's decision now allows Process Control to resume its former method of controlling the level of material in the common hopper A tray, or chute, that accepts input to a mechanical device, such as a disk duplicator or printer. In the days of punch cards, millions of cards were numerically or alphabetically organized by placing them into the hopper of a card sorter, taking them out of all the stackers and putting of its continuous gravimetric blenders by weight, using a PID (1) (Process IDentifier) A temporary number assigned by the operating system to a process or service. (2) (Proportional-Integral-Derivative) The most common control methodology in process control. loop. For the past two years the firm has had to control the level using two proximity switches. |
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