Most bindings on quilts are double. so you don't open ..the binding is folded in half then the raw edges of binding sewn to the edge of the quilt then turned over and the folded edge sewn down.. there are lots of tuts. on bindings on utube..and on this board also.. I DON'T have a binding machine so I am not sure I understand what you are asking. but maybe this helps?.. hope so.