Patent ID: 8484938

Claim:
A header for cutting and transporting a standing crop comprising: a header frame; an elongate cutter bar arranged along a front edge of the frame; a knife mounted on the cutter bar for cutting the standing crop; a draper assembly mounted on the header frame rearwardly of the cutter bar such that cut crop falls onto the draper assembly for transportation longitudinally of the header; the draper assembly including a first and a second draper guide roller each arranged at a respective end of the draper assembly spaced apart along the cutter bar with an axis of each guide roller arranged substantially at right angles to the cutter bar; the draper assembly including a draper canvas forming a continuous loop of flexible material wrapped around the rollers so as to define an upper run of the draper canvas on top of the rollers and a lower run of the draper canvas below the rollers and so as to define an outer surface of the draper canvas which faces outwardly of the loop that the outer surface forms the upper surface of the upper run and the lower surface of the lower run and an opposed inner surface of the draper canvas which faces inwardly of the loop; the draper canvas comprising a continuous belt of a fabric material having an inner surface for engaging the first and second draper guide rollers and an outer surface for engaging a material to be carried thereon; said first draper guide roller comprising: a cylindrical metal roller body having an outer metal cylindrical surface surrounding an axis of rotation of the roller for engaging a drive surface of the canvas wrapped therearound; and a plurality of raised elements on the outer metal surface of the roller body so as to be raised to a height from the metal surface; the raised elements being arranged in a pattern on the metal surface so as to leave areas of the metal surface between the raised elements which are free from the raised elements so that the metal surface is bare; wherein the height of the raised elements from the metal surface is less than 6 mm; wherein the raised elements comprise a material which is, relative to the outer metal cylindrical surface, a hard wear resistant material; and wherein the material comprising the raised elements is clad as an additional material onto the outer metal cylindrical surface of the roller.