A tie bag includes a hem seal, at the mouth of the bag, which grips the top of a receptacle, when the tie bag is used as a liner for the receptacle, to preclude having the mouth of the bag fall into the receptacle. The hem seal forms a hem flap, which is cut in a geometric pattern to provide tie fasteners....http://www.google.com/patents/US7347624?utm_source=gb-gplus-sharePatent US7347624 - Tie bag
