I was asked in a PM today about designs for a Lieberman cigar bunching device.
Like the use of "Kleenex" as a generic term for facial tissue of all brands, "Lieberman" has been generally used to describe most mechanical methods of cigar bunching (applying the binder to cigar filler). There are dozens, if not hundreds, of patents for all manner of such machines--the majority from the early 20th century.
The most basic designs incorporate a curved rolling deck covered by a loose, flexible, rubberized mat that can form a pocket at the near end of the rolling deck. How large a pocket can be formed determines the ring gauge of the resulting cigar bunch. Adjustment of the ring gauge is made by a locking take-up roller on the far end of the deck.
A roller draws the pocket of the flexible mat snugly over the curved rolling deck, firmly rolling the contents of the pocket, then dropping it off the deck at the opposite end. Since the deck is curved, the swing arm to which the movable roller is attached must match the deck's radius of curvature. So the pivot of the swing arm is usually a considerable distance below the working surface.
Here is an example. This is a patent of an Enfield design.
Enfield cigar bunching machine, 1936.
http://www.docstoc.com/docs/133877973/Cigar-bunching-machine
The long-radius swing arm can be replaced using a roller that slides within a curved track.
The basic concept differs little from some common cigarette hand rollers.
There's a handy Lieberman designed and built by marksctm earlier in this thread:
http://fairtradetobacco.com/showthread.php?2033-A-different-way-to-roll-cigars#10
Bob