A drum arranged for reeling and dividing an elongate web of sheet material to produce discrete stacks of web portions is provided. The drum includes a series of faces forming a web-receiving loop that extends around a central axis of the drum, each face of the drum being defined by a respective drum segment that is configured to support a respective stack of web portions of a web reeled onto the web-receiving loop. The drum segments are movable to enable the web-receiving loop to expand to increase tension in a web reeled onto the web-receiving loop to divide the elongate web into discrete stacks.

A method of preparing an elongate web of sheet material for dividing into discrete stacks of web portions after reeling the web onto a drum is provided. The method includes forming transverse discontinuities in the web at spaced intervals corresponding to edges of the discrete stacks to be formed, the intervals progressively increasing along the web so that the discontinuities form angularly-aligned groups when reeled onto the drum.

An installation includes a guide arrangement, guiding a material web, a conveying speed detection device, detecting a conveying speed of the conveyed material web, and a winding arrangement arranged downstream from the conveying speed detection device. The winding arrangement includes a rotatably mounted winding device, winding up the material web. The winding device is non-circular in cross section at least in a material web winding-up region, folding the material web. The winding arrangement has a rotary drive, in driving connection with the winding device, driving the winding device in rotation. An actuating device is at least temporarily in signal communication with the conveying speed detection device for receiving conveying speed signals therefrom, characterizing the respective conveying speed of the material web, and is at least temporarily in signal communication with the rotary drive for actuating the latter upon folding the material web in dependence on the conveying speed signals.

A winding apparatus for the production of power storage devices comprising: a frame, a first actuator device supported by the frame and comprising a rotor and a first drive element, a support which is driven in rotation by the first actuator device through the first drive element, a second actuator device comprising a second drive element and a non-circular core on which to wind a material; said core being arranged on the support in a rotary manner and being driven in rotation by the second actuator device through the second drive element. The second drive element passes at least partially through the rotor.

It is described a winding apparatus for wrapping a material around a core of flat shape that rotates around a rotation axis rotating in its turn with a circular trajectory, controlling the laws of motion both of the core rotation around its axis and of the circular trajectory of its rotation axis, motor driven independently by means of electric cams, such as to cancel the variations of position and speed of the material at the entrance of the core The winding apparatus is used for producing electric energy accumulating devices.

A winder includes a winding mechanism, a chamber housing the winding mechanism, at least one vacuum pump, and a product case. The winding mechanism is configured to wind a belt-shaped raw film around a winding core. The belt-shaped raw film is composed of a plurality of electrodes and a plurality of separating films. The at least one vacuum pump is configured to suck air into the chamber. The product case is configured to house a plurality of winding products each formed by winding the raw film with use of the winding mechanism disposed in the chamber.

A winder includes a winding mechanism, a chamber, a vacuum pump, a conveying route and a product case. The winding mechanism winds a belt-shaped raw film around a winding core, the belt-shaped raw film being composed of a plurality of electrodes and a plurality of separating films. The chamber houses the winding mechanism. The vacuum pump sucks air into the chamber. The conveying route has a sealed outer space outside the chamber, an inner space of the chamber leading to the outer space in the conveyance route. The product case is disposed in the conveying route to house a plurality of winding products each formed by winding the raw film with use of the winding mechanism.

A winding apparatus is disclosed for winding material around a core of flat shape rotated around a rotation axis carried by a crank that is in turn carried by another crank, the three rotation axes of the core and of the two cranks being motorized independently by respective electric cams, with three distinct laws of motion programmed to cancel the variations in position and speed of the material entering the core. The winding apparatus is used for the production of electric energy storage devices.

A winder includes a winding mechanism, a chamber, a vacuum pump, a conveying route and a product case. The winding mechanism winds a belt-shaped raw film around a winding core, the belt-shaped raw film being composed of a plurality of electrodes and a plurality of separating films. The chamber houses the winding mechanism. The vacuum pump sucks air into the chamber. The conveying route has a sealed outer space outside the chamber, an inner space of the chamber leading to the outer space in the conveyance route. The product case is disposed in the conveying route to house a plurality of winding products each formed by winding the raw film with use of the winding mechanism.

A winding apparatus is disclosed for winding material around a core of flat shape rotated around a rotation axis carried by a crank that is in turn carried by another crank, the three rotation axes of the core and of the two cranks being motorized independently by respective electric cams, with three distinct laws of motion programmed to cancel the variations in position and speed of the material entering the core. The winding apparatus is used for the production of electric energy storage devices.