Winding device

A winding device for winding a web on a core for forming a roll comprising:

• web feed means for feeding the web at a feed speed;
• a first drum rotatable at a peripheral speed substantially equal to the feed speed;
• a second drum spaced from said first drum, rotatable at a speed substantially equal to the feed speed and guiding the fed web;
• core insert means for inserting a core between said first and second drums;
• said first and second drums rotating to wind the web on the core to form a roll;
• drum drive means connected to said first and second drums for rotating said drums and for slowing one of said drums after a roll has been formed to advance the roll on said one drum;
• said inserter means being operable to insert a new core between said first and second drums when the roll is advanced with web extending between the roll and the new core;
• web tear means associated with said one drum for tearing the web between the roll and the core and for drawing the web between the roll and the core into a position between the core and said one drum;
• said drum drive means being operable to increase the slow rotation of said one drum to the feed speed after the web between the roll and the core is drawn between the core and said one drum to wind web on the new core.

A continuous winding device for winding a web on a core to form a spool comprising:

• a first drum drivable at a peripheral speed equal to a speed at which the web to be wound is fed during a winding phase;
• a second drum spaced from the first drum by a distance corresponding to a diameter of the core for winding the web for the formation of a spool, the second drum being rotated at a peripheral speed equal to that of the first drum and the web being guided along the second drum;
• means for driving the first and second drums and for temporarily varying the speed of one of the drums during a core replacement phase and for tearing the web;
• means for inserting a core between the two drums during the core replacement phase;
• and a displaceable presser drum bearing against the spool being formed and holding the spool between the first and second drums and the presser drum during winding the first drum including at least one annular seat and at least one perforated zone having orifices adapted to exert a suction during a removal of a finished spool and of insertion of a new core, to bring the web back into the zone in which tearing is to take place, and for inserting the web between the drums and the new core, with vacuum means connected to the first drum for exerting suction therein.