Flap - a paper clip or a fragment of matter, skin, ie not the whole piece, and part of it. This is also the remains of fabric and leather in garment, textile and leather industries. The word "flaps" means major segments, and "flap" - smaller.
With flaps connected "patchwork" - machinery and sewing applique patchwork, where small details superimposed on the larger ones. From the English name of the technique translates as "patch", "flap" (patch) and "work" (work). In the manufacture of quilts are usually made quilted, made of small squares or corners.