Sunflower Seed question....How are the shells removed from the sunflower seeds?

Like when you buy bags of sunflower seeds that have already been shelled...what kind of machine 9 or human?), does this??

Sunflower Seed question....How are the shells removed from the sunflower seeds?
As opposed to copying and pasting the entire answer, since I didn't know and had to look into it for you, just click on this link:





http://answers.google.com/answers/thread...





I hope this helps! I love sunflower seeds!