Originally Posted by
Quincunx
I think I can use different words to describe the hinges and answer the question at the same time.
The center pin bulges out on one side of the hinge. On the other side the hinge is flat all the way from screw holes across the pin to the other screw holes.
It is the flat side of the hinge which goes upwards in the folded-out part of the table so no fabric catches on the bulged out part of the pin.
That is actually opposite the two cabinets that I have ( mine may have been changed ) and it is not the question that was asked.