Cut-off device

Claim 1

A WEB CUT-OFF DEVICE, COMPRISING A FIRST ROTATABLY MOUNTED ROLL HAVING A KNIFE ADJACENT ITS PERIPHERY PROVIDED WITH A CUTTING EDGE WHICH EXTENDS STRAIGHT AND AXIALLY OF THE ROLL, A KNIFE-EQUIPPED SECOND ROLL ROTATABLY WITH SAID FIRST ROLL AND POSITIONED TO COACT THEREWITH IN PRODUCING A SHEARING ACTION DURING ROTATION OF SAID ROLLS, SAID SECOND ROLL BEING EQUIPPED WITH A LONGITUDINALLYEXTENDING SLOT IN THE OUTER SURFACE THEREOF FOR MOUNTING SAID SECOND ROLL KNIFE, SAID SLOT BEING EQUIPPED WITH CYLINDRICAL ENLARGMENTS AT EACH END OF SAID LONGITUDINALLYEXTENDING SLOT, A SLOT-EQUIPPED PLUG IN EACH SLOT ENLARGEMENT, AN ELONGATED KNIFE HOLDER IN SAID ELONGATED SLOTS WITH THE HOLDER ENDS BEING MOUNTED IN SAID PLUG SLOTS, AND MEANS IN SAID ROLL FOR CONFINING SAID HOLDER AND PLUGS TO POSITION SAID SECOND ROLL KNIFE (1) IN A PLANE WHICH IS AT AN ACUTE ANGLE TO THE AXES OF SAID ROLLS, (2) WITH THE CUTTING EDGE OF SAID SECOND ROLL KNIFE INCLINED RELATIVE TO THE SURFACE OF SAID SECOND ROLL, AND (3) TO DISPOSE SAID CUTTING EDGE SUBSTANTIALLY IN THE FORM OF A HELIX.