| 摘要 |
<p>A three-knife cutting machine for trimming the front side and the head- and foot-side of brochures, books, and the like, in which the products to be trimmed are slidable in stacks with the back side forward from a magazine charged from above downward by carriers adjustable to the desired stack height to the cutting station, and in which there is provided a shutter, likewise adjustable in height, by facing the back of the products to be trimmed, which serves for retaining the products remaining over the stack to be led off. In order to prevent, in the case of differing height of the stack at the back with respect to the front side, a gap from arising between the lower end of the shutter and the surface of the led-off stack, control means are provided, by which, after the back of the led-off stack has passed the shutter, a relative movement can be established between the shutter and the led-off stack in such a way that the shutter remains in contact with the surface of the led-off stack during the entire sliding-out movement. Even in the case of thin products, in this manner the lowest product is prevented from being carried along by friction from the retained stack.</p> |
