Paper scoring and slitting machine

Claim 1

A scoring and slitting machine for a moving web including a first set of upper and lower rotary knives and scoring wheels for scoring and slitting the web; a second set of upper and lower rotary knives and scoring wheels, spaced from the first set for alternate operation on the web for producing an alternate pattern of slits and score marks; the improvement comprising: a. supporting cross shafts for rotatably mounting each of the sets of slitting knives and scoring wheels; b. a threaded cross shaft in parallel alignment with each of the supporting cross shafts; c. a plurality of split nuts coupled to the knives and scoring wheels for selectively engaging the threads on said threaded cross shaft for moving the knives and scoring wheels transversely to predetermined positions when the threaded shaft is rotated and for anchoring the knives and scoring wheels when the threaded shaft is not rotating; d. means on each of the split nuts for engaging and disengaging the nuts from the threaded shafts; e. circuit means including a source of potential, for selectively operating the split nut engaging means during a pattern changing operation; f. and means comprising a manually operable selector switch to energize either a first or second relay winding to raise one of the cross shafts and lower the other cross shaft while the web is moving.