Quote Originally Posted by Toolmaker51 View Post
Pushed or pulled, same effect. The operation is known as 'slitting'.
A foot (stomp )shear variety, known as a 'gap or 'C' frame' can also do this, still called slitting but mechanically works like a scissor.
Yey. Worked on one of those. Haven't worked with one of these roller types. But my guess is once you get it cutting it should be fairly easy to cut and follow a line.