An extension for a shelf, the shelf having a substantially planar top surface, a plurality of holes in the top surface, and a front edge. The apparatus for performing the method includes at least one transmitter and at least one receiver. The first folding surface with the second folding surface forms an angle \u03b1, the first folding surface with the holding plane forms an angle \u03b21 and the second folding surface with the holding plane forms an angle \u03b22 and the first folding surface and the second folding surface are intended for pressing onto the workpiece during the folding over of an edge. This vapor deposited coating serves to bind the parts tightly together. Identification of objects may be based at least in part on at least one of shape, luminance, geometry, spatial location, motion and spectral characteristic.