Patent ID: 8011284

Claim:
A paperboard die-cutting device for making paperboard boxes which is adapted for connection as an independent operating unit to an output of a paperboard sheet slotting machine having a slotting machine frame and feeding paperboard slotted sheets in a longitudinally feeding direction, wherein said die-cutting device is mounted on a cross-sliding supporting framework independent from said slotting machine frame, and which is transversely slidingly driven by a gear motor unit also mounted on said supporting framework and cross-sliding on cross slides applied to said slotting machine frame and cross arranged with respect to said longitudinal feeding direction, said gear motor unit rotatively driving a gear motor unit worm screw engaging with a female thread of a bush supported by said supporting framework, said supporting framework further supporting two first driven shafts supporting a pair of roller supported cross-cutting means for making, in said paperboard sheets, two cross-slots, and two second driven shafts each idly rotatively supporting an abutment polyurethane ring element allowing said cross-cutting means to operate at different cutting portions to prevent said abutment ring elements from being quickly worn, and three motors, a first of said three motors driving said two second driven shafts, and the second and third motors driving said two first driven shafts.