"They were making the metal ring band for 27" and 32" Trinitrons"
Those were really tough bands to cut off the tube!
I found this 2009 article that states that... the Sony US CRT plants were shut down about 5 years before...So that pretty much pegs it at 2004. I was not aware of the Sony facility in Pittsburgh.
http://www.allbusiness.com/company-a...2874083-1.html
jr