The asphalt plant I ran had a shaker screen that separated the dried and heated gravel before the aspalt was batched and mixed. It was supported by coil and leaf springs. The leaf springs were flat stacks of 8 springs. The heat and operation took their toll on them and required some replacements once or twice per year. When we were replacing those springs that rumor seemed to get around our local plants. Without fail, sometime during the day one of our mechanics from our truck shop would show up to gather the broken spring clusters for his knife making activities. They were junk to us, but they were gold to Delbert :lol: