ends of each of carriages 102 and 104 and into stitching machine 100 is a means for advancing fibers delivered by the lay down carriages into the stitching machine in a preferred embodiment as illustrated in fig1 this advancing means is comprised of endless belts of hooks 106 and 108 of course those of ordinary skill will recognize that in order to maintain the alignment of carriage 104 with carriage 102 and knitting machine 100 but maintain the angled orientation thereof it will be necessary for carriage 104 to have a traverse longer than that of 102 however this can conveniently be provided for in interchangeable parts by mounting the framework of each of carriages 102 and 104 on extendable sleeves attached to the vertical posts of the framework thereby the carriage traverses can be shortened or lengthened as needed alternatively carriages of predetermined length for the various desired angles can be built in operation of the apparatus of fig1 weft fibers 110 from carriage 102 are laid down in parallel array and transferred to the advancing rows of hooks 106 and 108 as these fibers are carried toward stitching machine 100 they pass under carriage 104 carriage 104 lays down a series of parallel fibers 112 on top of the fibers 110 from carriage 102 however these fibers 112 due to the orientation of carriage 104 are aligned at an angle or bias to the alignment of fibers 110 of the first layer it will be recognized.