A device is for automatically introducing a reinforcing sheet into a coreless coil applicable to a coreless winding machine. The winding machine includes such a device. In particular, a device is for introducing a reinforcing paper sheet into a coreless roll being wound with a continuous strip material by a coreless winding machine. The device includes a feeding tray for paper sheets, a feeder of the paper sheets taken from the feeding tray, and an introduction member of a paper sheet loaded into a roll being wound in the winding machine.

An improved reel or spool package comprises opposing flange assemblies. Each flange assembly comprises inner and outer parallel members having a connective material in between them. A core interconnects the flange assemblies. One or more rods extends through each end of the center core such that portions of the rods are in contact with the connective material. The connective material connects the inner and outer parallel members of each flange assembly together and holds the rods in place relative to the core and the parallel members. There is no need for additional fastening devices (e.g., bolts, screws, welds, etc.). The resulting package is extremely strong, even if a paper core is used, and can replace wood or metal reels currently used in many applications.

A paperboard winding tube of enhanced compression stiffness and resistance to deformations leading to ovality under gravity type loading is disclosed. The paperboard winding tube may include a cylindrical body wall formed from a plurality of structural paperboard layers with at least one central structural paperboard layer disposed between at least one radially inward structural paperboard layer and at least one radially outward structural paperboard layer. The radially inward and the radially outward structural paperboard layers may be formed of a paperboard ply of a first stiffness, and the central structural paperboard layer may be formed of a paperboard ply of a second stiffness that is less than the first stiffness. The arrangement of the plurality of structural paperboard layers increases the compression stiffness of the paperboard winding tube to resist deformations leading to ovality of the cylindrical body wall under gravity type loading of the paperboard winding tube.