Patent ID: 7374075
Filing Date: 2008-05-20
Classification: B31B,Y10T

Abstract:
1. An apparatus comprising: a fixed support structure; a carriage; first and second guide shafts connected to said carriage, said first and second guide shafts having mutually parallel axes; first and second bearings in which said first and second guide shafts are respectively supported for vertical translation, said first and second bearings being mounted to said support structure; a cylinder mounted to said support structure, said cylinder comprising a piston coupled to said carriage, said piston having an axis parallel to said axes of said first and second guide shafts; first and second drive rollers rotatably mounted to said carriage; and a shelf mounted to said support structure, disposed in a horizontal plane and comprising a longitudinal groove, wherein each of said first and second drive rollers comprises a respective peripheral groove aligned with said longitudinal groove, and said carriage is displaceable in a vertical direction by actuation of said cylinder.