Patent ID: 6178976
Filing Date: 2001-01-30
Classification: B08B,C23G

Abstract:
An improved cover for containment and exhaust of fumes from an acid bath in a pickling line having,a) a pickle tank having a bottom wall, end walls and side walls for containing an acid bath for pickling metal strip;b) means for introducing metal strip over one end wall of the tank, passing the metal strip through the acid bath and over an opposite end wall of the tank;said improved cover, substantially completely covering the pickle tank and acid bath, and comprising:a top wall;side walls depending from the top wall which include a means to support the cover on the side walls of the pickle tank;end walls at each end of the cover depending from the top wall and forming a gap with the end walls of the pickle tank to permit the introduction or exit of metal strip;a bottom wall connecting the depending side walls and forming an internal cavity bounded by the top wall, the side walls and the bottom wall of the cover;a plenum chamber formed in said internal cavity and sharing at least a bottom wall with the cover and extending from one end wall of the cover to approximately the opposite end wall of the cover; andat least one exhaust means mounted on the cover and communicating with the plenum chamber, whereby evaporating fumes from the acid bath are confined to the plenum chamber and exhausted from the pickle tank.