US Patent No. 1,028, granted December 10, 1838 to John Humphries of New York, for an improvement in the manufacture of carpeting and rugs. The invention attaches an additional ply, rib or knit layer of weft material to the back of carpets such as Brussels, Wilton, Saxony and Imperial, secured by threads passing over and under the ply and through the carpet. A single figure shows the back of the carpet with the added ply and stitching threads.