of grooves 41 formed in its upper surface which extend transversely to the running direction of the conveyor thereby producing an upper surface which is flexible and enlarging the friction factor to articles carried by the conveyor there is shown in fig1 and 11 another embodiment of link assembly in accordance with the present invention generally designated by the numeral 131 which are pivotally connected to each other in an endless fashion to form a conveyor chain this link assembly is likewise comprised of a link portion 132 and a top plate portion 133 resin plate members 150 and 151 made of a different material then the link assembly are integrally provided on both sides of the top plate portion 133 the resin plate members 150 and 151 are preferably flat members made of a resin having a low friction factor and excellent wear resistance for example an ultra high molecular polyethylene resin the link portion 132 and top plate portion 133 are preferably made of a material different from the resin plate members 150 and 151 and as noted above may be made of resins or metals having a superior strength characteristic the plate members 150 and 151 may be integrally formed by placing the link in a cavity formed by overlapping hale and female molds 135 and 136 respectively as shown in fig1 to define a space between the inner surface of the female mold 136 and the lower surface of the top plate 133 the resin also flows through a plurality of holes.