This very old technique is still well used by ruggers in England especially the Yorkshire where Heather Ritchie lives. I learned the Proddytechnique withher in a workshop I took with her 3 years ago.
You will need a plyer or a sharp.
Cut the strips.
On the right side of the rug consists in pulling, with a plyer, short strips of fabrics (about 6 cm long x 1.5 cm wide) through the canvas.