Device for turning the front panel of a plate-like workpiece within a folder-gluer

A device for turning a front panel (2) of a flat workpiece (1) having a flap and along conveyor belts (12a & 12b) in a plane towards a transversely vertical retaining plate (20) within a folder-gluer and parting said flap in the front panel, this device comprising retaining sliding guides (22, 24), said vertical retaining plate (20) located transversly to the traveling direction above the travelling plane of the workpiece (1), wherein said vertical retaining plate or said retaining sliding guides form window openings having at least 3 sides through which a parted flap may be pushed, retaining sliding guides (22, 24), and a series of lifting fingers (30) located transversely to the traveling direction, below the travelling plane, and upstream of the retaining plate (20), this series lifting fingers (30) being fixed to a common shaft (32) and adapted to being raised by at least one actuator (50) from a rest position below the travelling plane to a slanted raised position at the arrival of the workpiece 5 front panel, in order to direct the front panel onto the retaining plate (20) and behind the retaining sliding guides (22, 24), the device further comprising at least one pusher (40) that is perpendicular to the retaining plate (20) and adapted to being linearly actuated by an actuator (44) in order to part a flap (5) of the front panel (2) when the latter passes near its maximum vertical position against the retaining plate (20) by actuatin and extending said pushers through said window openings while engaging said flaps.