Patent ID: 8727346

Claim:
A device for positioning a plate element in an infeed station of a machine for treating the element, the machine being fitted with a conveyor configured for gripping said element when said element is in a predetermined intermediate position, and for carrying said element in a rated running into successive processing stations, said positioning device comprising: a holding device for temporarily holding said element and configured for moving longitudinally alternately from an upstream position to a downstream position, and vice-versa, configured for picking up said element in a rear position and bringing it to the intermediate position, and to return empty to said rear position, a motor connected for longitudinally moving the holding device, from the upstream position to the downstream position, and vice-versa, as a function of the rated running, and a detector for detecting the rear position of said element, and emitting a position signal, wherein the motor is configured to longitudinally move said holding device from said upstream position to the downstream position, as a function of the signal emitted by the detector, so as to bring said element from the rear position to the intermediate position, wherein the holding device comprises a shelf that can move longitudinally and the shelf slides longitudinally on two lower longitudinal slides.