I agree with you Ron, all it can do is make the marble round. The patents on the tank part both prove you're right, the pattern is made in the tank. One shows a small section where the ribbon gathers before it goes to the shears. This would create the feathered or flame pattern before it ever comes out of the tank. The other shows 6 channels for different glass to enter the stream before it exits the tank. So in those two patents, you'd have a 6 ribbon marble and a feathered or flamey marble, depending on which patent you are using. Whether the 6 ribbon marble is a swirl or not depends on how the ingot exits the tank, not the rollers. Making the marble round might curve or squish the ingot a little but I can't see how that would make it into a swirl, especially since it's been proven that swirls can be made while making patches and visa-versa just by changing alignment of the machine and/or the distance between the outlet and cutters.