Abstract: A robot manipulator has an arm with a head which is mounted for movement up and down, along a first horizontal path, along a second horizontal path at right angles to the first path, about a vertical axis and about a horizontal axis so that it can reach all portions of a storage facility for bobbins, stacked blanks and/or other commodities which are to be fed to one or more tobacco processing machines. The head has a jaw chuck which can engage a cylindrical internal surface of a bobbin or the cylindrical internal surface of a tool which is used for the transport of stacks of superimposed blanks of paper or the like. The head further has a vertically movable annular pusher which can strip a bobbin off the chuck or which can actuate one or more pivotable supports forming part of the tool and serving to prop one or more stacks from below.