I don't think most folks would call those canes, Ralph, more like hand-gathered globs. AFAIK, canes are made in a rod-like form and then used to make marbles later, and you can form and cut multiple marbles from the same cane. I think hand-gathers are one-offs but they still need to be cut from the gather that is stuck to the punty rod. The machine is used to round the gob that is cut off.
It does look like they may be using bits of cane as a source of glass though.