Did you mean a blind stitched hem?
http://buzzybeesworld.blogspot.com/2...sible-hem.html
My Brother SQ9000 has a blind stitching foot. I have a hard time explaining things in writing. My machine came with a video showing me all those nifty little tricks with all the feet it came with.
Here is a you tube video for blind stitching hems on drapes. It's the same principle as if you were hemming jeans.
http://www.youtube.com/watch?v=jdKe9crSHac