How do you create a constant static charge to a rubber conveyor belt?

I'd suggest a van de graph generator thingy, not sure if that would do what you want though...

I need it in a large format, like for industrial use.

http://www.sciencefirst.com/pctr/10085.JPG :¬)

Lots of fun

The trouble is they can also be more like Tesla coils.

http://education.jlab.org/glossary/vandegraaff.jpg

If you are not careful.

you simply need a HT generator and a brush to transfer the Electrons onto the surface, and then you have to ensure you have an Over-Voltage spark-gap (a ground rail will do) as this can build up Lethal charges on a large scale that can sometimes act unpredictably.

ok, so a High Tension Generator, where do I get this? is it a Granger's item? are they legal? Thanks for the help!!!

Have you looked at electrostatic precipitators for HVAC?

I will look into that. Thanks for the help. Any more input is welcomed.

The fact the belt already exists is a clue. Add the material strip to the edge off the belt. Experiment small scale.