{HEAD ~ The abutment structure} is attached at the opposing sides of the seaming board proximate one of the opposing ends, and is adjustable between a closed condition opposing the upper surface and an open condition away from the upper surface and {TAIL ~ the opposing sides} of the seaming board 
{ HEAD ~ The abutment structure } is attached at the opposing sides of the seaming board proximate one of the opposing ends , and is adjustable between a closed condition opposing the upper surface and an open condition away from the upper surface and { TAIL ~ the opposing sides } of the seaming board
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH