Patent ID: 6402084
Filing Date: 2002-06-11
Classification: B65H

Abstract:
A ring assembly for mounting a core upon which an elongated element is to be wound, the ring assembly being driven by a drive shaft about an axis, the shaft including radially outwardly displaceable pistons for coupling the ring assembly to the core, the assembly comprising:an outer ring member for releasably receiving a first core thereon and having a plurality of annularly spaced radial first and second bores; a first core gripping member movable in each of the first bores and having a first position recessed in the first bore and a second position protruding radially outwardly from the first bore for gripping the core; a second core gripping member movable in each of the second bores, the second gripping member having a third position recessed in the second bore and a fourth position protruding radially outwardly from the second bore for gripping the core; a resilient member in the second bore for normally biasing the second core gripping member radially outwardly to the fourth position; and an inner ring member radially within the outer ring member, the inner ring member having an inner annular surface for facing the shaft and for engagement with the pistons and an outer ramped annular surface facing the outer ring member extending about the axis and sloping radially outwardly for engagement with and displacing the first gripping member radially outwardly to the second position upon relative rotation of the inner ring member about the axis with respect to the outer ring member in response to the radial outward displacement of the pistons.