Abstract: An automatic slide sleeving system in which a sleeve containing a plurality of pockets is moved past a rotatable member to which a vacuum is applied thereby drawing the sleeve along with the rotatable member to a position under a movable head where a second vacuum is applied pulling the pocket into an open condition and thereafter through an actuator mechanism, the slides which have been previously moved into position from a slide hopper by a shuttle are moved in to the open pockets by a tongue pusher after which the vacuums are removed and the rotatable member rotated thereby enabling the filled pockets on the sleeve to be collected.