Paul Maul & Fanatical,
Thanks for the explanations. This is turning out to be a great tutorial.
I'm also wondering about the wrapping machinery. I am fascinated by industrial machines. I love the show "How It's Made". That someone can sit down and come up with a hulking machine that does stuff (folding, printing, turning, spinning, cutting, etc.), completely boggles my mind. You can't go down to "Industrial Machines-R-Us" and buy what you need. Someone has to dream it up and then build it. Totally cool!