It’s a technique to be used in small bed covers and floor decorations, that is best when made with soft, wide-threaded fabrics that do not dilate. Pieces are assembled with sewing machine with the sewing allotments on the open side and then they are vertically cut with 1 cm distance. After washing, the cut parts are knitted together giving the piece a softer look. Especially with cotton flannels and polar fabrics, this technique is best for knee size blankets.
Example:
Sadiye Okyar's Quilt Gallery 