Abstract: An ejector unit for machines for handling signatures and similar flat articles comprises a first rotary body defining the output end of a conveyor on which a substantially continuous flow of articles to be handled is fed, a stop member selectively orientable between a rest position and an operating position in which the member stops the flow of articles adjacent the output end of the conveyor, and two second rotary bodies which can be rotated by the first rotary body to carry out a shaping (ribbing) action on the articles handled. Third rotary bodies interposed between the first rotary body and one of the second rotary bodies are movable between a first operating position in which motion is transmitted from the first rotary body to the second rotary bodies and a second operating position in which the transmission of rotary movement between the first rotary body and the second rotary bodies is prevented.

Abstract: A machine for stacking bundles of signatures and like products supplied in a continuous flow with their backs oriented in the same direction is provided by this invention. The machine comprises a support frame, a substantially horizontal endless conveyor supported by the frame having an input end for supplying the products to be stacked and an output end of loading the stacked products, and a platform for rotating an individual product. The platform is mounted rotatably on the frame about a vertical axis passing through the conveyor, and is translatable along the axis between a lowered position of substantial alignment with the plane of the conveyor, and a raised position in which the products on the conveyor can pass beneath the platform.