| 摘要 |
<p>To level and/or turn one or more stacks of sheet material arranged on a base or pallet, a pair of forks is used, operating opposite one another to raise the base and hold the stack together while it is turned; said forks are supported, in a bracket-like fashion, by means belonging to an independent unit for moving the base, which allow the stack to be transferred from a vertical position to a horizontal position, in which the stack rests on a first side and can be rotated through 90° rotation about a vertical axis, then is returned to the starting position, or turned through 180° to a vertical position in which the stack is tuned over relative to the starting position; said 180° rotation is effected in two successive stages, each involving a 90° rotation, separated by a temporary angling of the plane upon which the stack lies, this temporary angling also being used when the stack is only rotated through 90°, so that a second side of the stack, adjacent to the first, temporarily rests on a vibrating plate and in a position in which jets of air simultaneously cross it, promoting alignment of the sheets in the stack which have a first side resting on the vibrating plate and a second side, consecutive to the first, resting on a stop formed by the stack transfer means.</p> |
