A winding device for winding a web-shaped material, preferably a plastic film, has a reel for receiving the web-shaped material, a contact roller for feeding and pressing the web-shaped material against the reel, a device for rotationally driving a still empty reel, and a device for feeding the still empty reel to the contact roller. The device for rotationally driving the still empty reel and the device for feeding the still empty reel to the contact roller can act simultaneously on the still empty reel.

A device for rewinding and forming a paper roll in a rewinding machine comprising three rollers with parallel axes and perpendicular to the paper feeding direction, wherein two lower and upper winding rollers supported on a frame cooperate with a third swivel roller in pressure on a roll being formed, the paper being wound provided with a series of transverse piercing and weakening lines spaced apart according to regular intervals along their longitudinal development passing on the upper winding roller and finished roll exiting from an output opening defined between the lower roller and the third roller, the cores for the rolls fed one after the other by a conveyor, wherein mechanical tearing means are placed in the upper roller along its development facing towards the side of the paper facing towards the upper roller to positively act directly at a piercing line and cause the tearing of the paper.

A rewinding machine is described with a winding cradle defined by three rollers and including a fourth winding roller defining with the first winding roller a cradle in which the web material is pushed by a winding core to the beginning of each winding cycle, to cause severing of the web material without the need for controlled mechanical parts.

An automatic core loading system for loading a plurality of cores onto a rewind shaft includes a populating conveyor and a loading conveyor. The populating conveyor is configured to grab and move each core from a core source with the plurality of cores to a loading point for the loading conveyor one core at a time. The loading conveyor is configured to grab and move each of the cores from the populating conveyor at the loading point and move each core to a set position with a pre-determined or electronically measured gap between each core on the rewind shaft. Wherein, the automatic core loading system is configured to automatically load the plurality of cores onto the rewind shaft with the pre-determined or electronically measured gap between each core to match slit widths and spacing between a slit web of material.