Device for feeding sheets from one or two sources

A feeding device for separately feeding single sheets from at least one stack of sheets, comprising:

• a support structure provided with a table for positioning a stack of sheets to be fed;
• at least one pair of rotary drums rigidly positioned with a drive shaft which is rotatably supported on said support structure;
• a plurality of operating elements associated with said pair of drums, said operating elements comprising gripper elements positioned on said rotary drums for gripping said sheets and sucker elements for withdrawing a single sheet from the bottom of said stack and transporting the single sheet towards said gripper elements;
• and
• a linkage system comprising levers and cams provided in proximity to the first end of said drive shaft for controlling said operating elements so as to provide for a phase difference;
• wherein:
• said drive shaft is divided into two parts which can be connected together in an intermediate region at ends of each of said parts, the ends of each of said parts being provided with removable engagement means and being capable of being secured in a relative position and rotated through any selectable angle;
• said linkage system that comprises levers and cams operationally connected with the operating elements of a first drum of the device;
• and
• a second linkage system comprising levers and came is provided in proximity to the other end of said drive shaft and is operationally connected with the operating elements of a second drum of the device.