is foldably connected to the blank 20 by a hinge tab 54 56 58 respectively each of the hinge tabs 54 56 58 are severed from the blank 20 along their side edges while the inner and outer edges of the hinge tabs are scored to foldably connect the radially outer edge of each hinge tab 54 56 58 to the periphery of a corresponding core member 30 32 34 respectively and the radially inner edge of each hinge tab to the reel blank 20 the scored inner edges of the hinge tabs 54 56 58 are radially offset from the axis of the blank 20 an equal distance i e are disposed along the periphery of a circle 59 of constant diameter the diameter of which is equal to diameter of each of the core members 30 32 34 each of the hinge tabs has a different radial dimension or length hinge tab 54 being the shortest and hinge tab 58 being the longest as a result the axis of each core member as shown in fig1 is radially offset from the axis of the blank a distance which differs by an amount equal to the differences in the length of the various hinge tabs each core member 30 32 34 may be folded about its respective hinge tab 54 56 58 to an axial core forming position to form the core 60 as is best shown in.