Last week I had my furnace replaced & the guy had a neat tool RV builders might find useful, replacing hand seamers and bending brakes for some functions.
Imagine 3 pieces of steel sheet, about .035" thick and say, 18" long. Two pieces are 4" wide and the third is narrower, say 3 1/4". They are riveted or spot welded together to form a sandwich with the narrow one in the middle making a groove 1/4" wide on one side and 1/2" on the other.
To use, slide your piece of AL into the groove and simply fold it over. There is a link to an online video at http://www.malcoproducts.com/products/seamers/foldingtools.asp
They can be purchased on Amazon or Ebay, search for Malco folding tool, or at other sites. There are also other manufacturers and I suspect you could make one easily out of thicker pieces of AL.
Imagine 3 pieces of steel sheet, about .035" thick and say, 18" long. Two pieces are 4" wide and the third is narrower, say 3 1/4". They are riveted or spot welded together to form a sandwich with the narrow one in the middle making a groove 1/4" wide on one side and 1/2" on the other.
To use, slide your piece of AL into the groove and simply fold it over. There is a link to an online video at http://www.malcoproducts.com/products/seamers/foldingtools.asp
They can be purchased on Amazon or Ebay, search for Malco folding tool, or at other sites. There are also other manufacturers and I suspect you could make one easily out of thicker pieces of AL.
