seperate a seam edge

 From:  BurrMan
Is there a way that seperates the seam edge that have points pull it apart?

SO if you have a cylinder and seperate it, the 2 circles seperate out and you have essentially a rolled up peice of paper. Does that ever seperate with cutting the surface with something else?

So in the pick I trimmed the surface with another surface, to get what I want, but cant get the seam edge to seperate.

EDITED: 19 Jun 2012 by BURRMAN