Patent ID: 6514558
Filing Date: 2003-02-04
Classification: H01J

Abstract:
A method of providing a layer of a coating material on the inner side of a bowl-shaped rectangular display window for a color display tube, in which method a suspension of the coating material is provided on the inner side while the display window is horizontally arranged with its axis of symmetry oriented transversely to the inner side, whereafter the display window is rotated around its axis of symmetry for some time so as to distribute the suspension homogeneously on the inner side, said axis of symmetry being tilted until it is oriented substantially horizontally, during which rotation a part of the suspension provided is drained off the display window near its corners where it is collected in collection cups which are present near the corners during the rotation, and whereafter the suspension which is still present on the inner side of the display window is dried by means of thermal radiation, characterized in that, during the rotation, the part of the suspension collected in the collection cups near the corners of the display window is drained from these cups to a co-rotating central collection cup.