Well, at the risk of going off topic, I remember being told at school in the 1960's that the "Cornish" pasty was side crimped for the tin miners. As the menfolk of the stannery towns went to work, their wives would give them a complete meal - the Cornish pasty!

Why was it a complete meal?

The traditional Cornish pasty was filled with minced-meat, potatoes, swede and carrots at one end, and jam (and cream sometimes for a treat - probably clotted ).

Why the side crimping?

This was so the men could eat the middle of the pasty with dirty hands, sitting in the depths of the mines, and throw the crusts away!

If anyone's interested, this article bears out some of what my old schoolmaster, Vernon J Tipper, told us on a memorable afternoon!

http://www.porthleven-online.com/gpage7.html