BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING
FIG. 1 is a configurational diagram of a screen according to a preferred embodiment of the invention.
FIG. 2 shows an enlarged view of a section of the screen according to this embodiment in the vicinity of its top side.
FIG. 3 shows an enlarged view of a section of the screen according to this embodiment in the vicinity of its bottom side.
FIG. 4 is a graph charting a relationship between tensions given to the screen and the screen size.