Patent attributes
The invention relates to a book block clamp (1) for clamping and transporting book blocks (2) in book block processing machines, comprising an inner clamping jaw (5) and comprising an outer clamping jaw (6) which is arranged parallel to, and movable in relation to, said inner clamping jaw (5). A support element (20) is associated with the outer clamping jaw (6), which support element (20) can be moved into a position that is spaced apart in parallel in relation to the outer clamping jaw (6), as a result of which the opening width of the book block clamp (1) is reduced, while the distance between the inner and the outer clamping jaw (5, 6) remains unchanged. By separately controlling the opening width, reliable and impeccable guidance, in particular of unstable layers and/or folded sections of unbound book blocks (2), becomes possible, while the opening- and/or closing movement of the outer clamping jaw (6) continues to be controlled by way of a fixed greater actuating stroke, and is thus free of any jerking or jolting.
