Thank all of you for your answers. I think the demo that Kitsie gave is the one that I am thinking of. My needle only comes out when I get about 6" or so in from the end . When the thread becomes shorter that is when it comes undone.
Sorry I haven't had time to reply sooner. My sister (61) who lives with me, I am her guardian ( slow learner) has leukemia & I spend alot of time at the hospital here in West Plains & also at St. Louis. We have been battling this for 5 months now & sorry to say leukemia seems to be winning this battle.Plus I have my Mom in a nursing home here & am her caregiver. Alot going on & no time for me. I enjoy the time I do get to spend quilting.
Thanks again for all of your comments.
Donna The Rustic Quilter