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US 4,033,521 AGranted
Winding machines
OwnerAnthony Neiman Deeinventor
Life of this patent
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OwnerAnthony Neiman Deeinventor
Estimating the term…
A center shaft turret winder is provided with core change-over mechanism, so that rewinding of webs e.g. in a slitter-rewinder can proceed continuously, by replacing full cores with empty cores and severing the wound webs between the respective cores. The mechanism includes a knife member which pivots about an axis parallel to the center shaft axis to bring its cutting edge into contact with the moving webs, after the core shafts have rotated around the center shaft, so that the tension in the webs increases and they are severed so that rewinding continues on the new cores and the old, full cores can be removed and replaced with empty cores. A paper printing and slitting machine equipped with such a slitter/rewinder and change-over mechanism is disclosed, together with the electromagnetic clutch arrangements for driving the winding cores and various forms of knife member.
A core change-over arrangement for a turret machine having a centre shaft, which arrangement comprises first and second shafts each arranged for drivingly supporting at least one core, whereby a web may be wound upon a core upon one shaft or upon a core upon the other shaft, the first and second shafts having their axes parallel to and spaced from a further parallel axis around which the pair of shafts are rotatable, a knife member carried by the centre shaft and being mounted for pivotal movement about an axis located intermediate and parallel to the axes of the said first and second shafts, such that the cutter element of the knife member pivots about such axes from an inoperative position to an operative position, whereby rotation of the pair of shafts about the further axis causes the web being wound on to a core on one of the shafts to contact an empty core on the other of the shafts and whereby movement of the cutter element of the knife member into the operative position subjects the moving web to increased tension so as to sever it between the respective cores to allow further winding of the web on to the empty core.
Dependencies are inferred from the claim text.