Patent ID: 9011074
Filing Date: 2015-04-21
Classification: B65H

Abstract:
1. A method for turning stacks of sheet-shaped material, the method comprising the following steps: a) feeding a stack to a stack stop in a pivot fork; b) lifting the stack with height-adjustable lower grippers or by rotating the pivot fork; c) pivoting the pivot fork through a pivot angle of approximately 70°; d) aligning the stack against the stack stop and the lower grippers; e) clamping the stack between the lower grippers and upper grippers by adjusting a height of the lower grippers; f) continuing pivoting of the pivot fork until reaching a final position; g) withdrawing the upper grippers; h) depositing the turned stack; i) rotating the pivot fork back and extending the upper grippers into an initial position; and j) repeating steps a) to i) until all stacks have been processed; carrying out the steps b) through e) in sequential order from b) to e).