With the arrangement of the smaller diameter drive surface 30 and the larger diameter slip surfaces 32, the marker tubing stock 20 and the carrier 22 can be positioned in a substantially common plane as {HEAD ~ the product} passes {TAIL ~ the print head} 26 
With the arrangement of the smaller diameter drive surface 30 and the larger diameter slip surfaces 32 , the marker tubing stock 20 and the carrier 22 can be positioned in a substantially common plane as { HEAD ~ the product } passes { TAIL ~ the print head } 26
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH