a device for needling a prebonded web , comprises at least one needle board reciprocatingly movable in a stitching direction , a stitch base between a feed roller and a discharge roller , which stitch base is located directly opposite the needle board and forms a web guide that is convex in a direction of web movement . the stitch base consists of blades extending transversely to the direction of web movement and having end faces defining a continuously curved enveloping surface . the end faces constituting a web support , and between which blades there engage at least two needle rows extending tranversely to the direction of web movement engage between adjacent blades during their reciprocation .