Patent ID: 7748940

Claim:
An apparatus for perfect binding of unbound print products to form bound print products, the apparatus comprising: at least one processing station arranged along a circulating path between a feed station for the unbound print products and a delivery station for the bound print products; and a plurality of clamping devices arranged successively along the circulating path and driven jointly, each of the clamping devices adapted to hold at least two of the unbound print products such that the unbound print products face the processing station with overhangs that freely project from the respective clamping devices and form spines of the unbound print products; wherein each of the clamping devices comprises at least two tongs, each tong is adapted to hold at least one unbound print product, and the tongs comprise a joint counter support having clamping elements attached thereto, wherein the clamping elements are movable with respect to the joint counter support in a direction substantially perpendicular to the circulating path.