Web rewinding machine, adaptable to different core diameters

A rewinding machine for the formation of logs of web material wound on a core comprising:

• a first winding roller around which the web material is run;
• a second winding roller forming, together with the first winding roller, a nip through which the core and the web material are made to pass;
• a feeder to feed the web material into the nip, said feeder having a speed of advance substantially equal to speed of feeding of the web material;
• an inserter to insert a core on which the web material is to be wound;
• before the nip, with respect to a direction of advance of the web material, a rolling surface forming, together with the feeder, a channel into which the core is inserted;
• an interrupter of the web material, which interacts with the feeder in an intermediate position along the channel, between a point of insertion of a new core and the nip, said interrupter also acting to sever the web material in an intermediate position along the channel;
• wherein the rolling surface forming the channel is at least partially formed by an elastically deformable cradle.

A rewinding machine for the formation of logs of web material wound on a core comprising:

• a first winding roller around which the web material is run;
• a second winding roller forming, together with the first winding roller, a nip through which the core and the web material are made to pass;
• a feeder to feed the web material into the nip, said feeder having a speed of advance substantially equal to speed of feeding of the web material;
• an inserter to insert a core on which the web material is to be wound;
• before the nip, with respect to a direction of advance of the web material, a rolling surface forming, together with the feeder, a channel into which the core is inserted;
• an interrupter of the web material, which interacts with the feeder in an intermediate position along the channel, between a point of insertion of a new core and the nip;
• wherein the rolling surface forming the channel is at least partially formed by an oscillating cradle;
• and
• further wherein the rolling surface is divided into at least two parts, a first part of which is formed by the oscillating cradle, while a second part is formed by a linking surface which is fixed with respect to the axis of the second winding roller.

A rewinding machine for the formation of logs of web material wound on a core comprising:

• a first winding roller around which the web material is run;
• a second winding roller forming, together with the first winding roller, a nip through which the core and the web material are made to pass;
• a feeder to feed the web material into the nip, said feeder having a speed of advance substantially equal to speed of feeding of the web material;
• an inserter to insert a core on which the web material is to be wound;
• before the nip, with respect to a direction of advance of the web material, a rolling surface forming, together with the feeder, a channel into which the core is inserted;
• an interrupter of the web material, which interacts with the feeder in an intermediate position along the channel, between a point of insertion of a new core and the nip;
• wherein the rolling surface forming the channel is at least partially formed by an elastically deformable cradle;
• and
• further wherein the rolling surface is divided into at least two parts, a first part of which is formed by the elastically deformable cradle, while a second part is formed by a linking surface which is fixed with respect to the axis of the second winding roller.