{HEAD ~ This web} of cardboard material is guided, as illustrated, under the wedge clamping beams 3 and 4 and, therefore, spans {TAIL ~ the working surface} 2 
spans
{ HEAD ~ This web } of cardboard material is guided , as illustrated , under the wedge clamping beams 3 and 4 and , therefore , spans { TAIL ~ the working surface } 2
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH