Patent ID: 8453422

Claim:
An apparatus for wrapping a stack of objects with a film, the apparatus comprising: respective first and second supplies of first and second films; a pull-down device shiftable vertically along the stack of objects; and a film-feed head between the pull-down device and the supplies and having: a drive roller rotatable about an axis in the film feed head, first and second pairs of counterrollers angularly offset from each other relative to the drive-roller axis, the drive roller and the pairs of counterrollers being relatively shiftable between end positions in each of which one of the pairs is spaced from the drive roller and the other pair is engaged with the drive roller, the first film passing between the first pair and the drive roller and the second film passing between the second pair and the drive roller, and actuator means for alternately relatively shifting the first and the second pairs of rollers relative the drive roller for pinching the films against the drive roller and, on rotation of the drive roller, feeding the pinched film to the pull-down device.