Film winding machine

Claim 1

An automatic machine for automatically winding film on individual cores to form rolls of film comprising, a rotationally driven drum, core delivery means to deliver cores individually sequentially to said rotatably driven drum at the surface thereof at a first winding position for rotation by said drum by frictional contact and including means to rotatably drive the cores individually before placement on said drum and at a peripheral speed approximating a linear speed of a film advanced longitudinally for winding on said cores individually to form rolls of film, means cooperating with said core delivery means to apply an adhesive to the cores individually prior to delivery of the cores to said driven drum, means to deliver a film to said driven drum longitudinally for application against said adhesive on the individual cores for winding respective lengths of film on the individual cores during rotation thereof at said first position to form individual rolls of film, means to deliver the individual rolls of film to a second position on said driven drums while continuing to rotate the individual rolls while winding film thereon, means to selectively sever the advancing film to terminate the winding of film on the individual rolls and to apply the film severed to the adhesive of a next successive core for winding film thereon, means to eject the wound rolls of film from said second position as an output of said machine, said means to deliver the rolls of film from the first position to the second position comprising two pairs of grippers, and means for operating the grippers of each pair jointly and separately selectively for positioning one of the grippers of each pair in position to hold the individual cores and rolls of film in said first position and for moving grippers to each pair to move the rolls of film individually from said first position to said second position.