Abstract: A tray is adapted to be supported on an elevator mechanism and moves vertically by the elevator mechanism to pick up a shingled array of signatures which are supported on edge in an inclined position adjacent the elevator mechanism. The tray includes a generally horizontally extending support portion adapted to engage the lower edges of the signatures as the tray is raised. A member located at one end of the tray has an inclined surface against which the last signature at one end of the tray rests. A clamp mechanism at the other end of the tray includes a clamp member which is engageable with the last signature in the array to clamp against that last signature.