merge to define a pointed edge 24 the third side or face 25 of each bar 20 is opposite the pointed edge 24 and is desirably spaced from the main cylinder of the carding machine to separate foreign matter lint and the like from the fibers remaining on the main cylinder during the carding operation the side 23 of each bar 20 and 21 is illustrated as including a seam 26 defined by overlapped ends of the material from which the bar is formed the bars 20 and 21 may be of a uniform dimension throughout their respective lengths and extend in uniformly spaced parallel relation to each other transversely of the screen to define a space of approximately 4 8 mm 3 16 34 bettween adjacent bars this distance may be varied as desired alternatively the bars 20 and 21 may be tapered inwardly from their respective junctures with the side frames toward their junctures with the center bar as described in u s pat no 3 348 268 issued oct 24 1967 end bars 27 extend transversely of the screen between side rib 15 and center rib 19 the end bars are positioned at the center of the screen in fig2 and are proximate to each other when the front screen portion 14a and back screen portion 14b are assembled to form the complete screen end bars 28 are.