Here is the patent for that product. Perhaps this will shed some light on how it works. I'll see myself out. http://www.google.com/patents/US5590093 http://ww

Here is the patent for that product. Perhaps this will shed some light on how it works. I'll see myself out. http://www.google.com/patents/US5590093 http://www.google.com/patents/US5590093