The standard card has only one licker-in; for a long time attempts have been made to increase this number and thereby to increase the opening effect. With the introduction of modern high-production cards, several manufacturers again saw this approach as one way to improve performance. Various card designs therefore now incorporate multiple lickers-in, e.g. Rieter (Fig. 101), Trützschler or Marzoli.
They are optionally available. The clothing surfaces are in the doffing configuration relative to each other, and speeds must be increased in the throughflow direction, for example from 600 rpm (first licker-in) via 1 200 rpm to 1 800 rpm (third licker-in) (or the velocity by increasing the diameter). Instead of grids, the lickers-in are encapsulated in casings.
Within these casings there are a few small openings including sharp-edged grid blades to scrap off the impurities. The latter fall into a pipe and are sucked away to the waste collecting devices. For fine, long fibers mostly only one licker-in is used.