As mentioned here: http://sewingmamas.com/PHP-Nuke/modu...sc&start=0

Obviously these are just demonstration pieces, so you can see what I'm doing.

Two pieces of "pattern" right sides up, as they would go together



Fold the piece that will go on top under about 1/4" - 3/8" (the green one here):



Lay just barely over the top of the bottom layer, raw edges meeting on the bottom and stitch:



Back side:



You can get the same type of results by stitching right sides together, pressing seam allowances to one side then coverhemming, but this is much faster and the way its basically done in the factory....with some modifications.