Abstract: A rewinder machine for the production of rolls of web material is described, comprising: a winder unit (3, 5, 7); a path for delivering the web material (N) to said winder unit; a system for continuously feeding said web material into said winder unit; a distributor (31) of a sheet material (F) for wrapping the rolls formed by said winder unit, installed and operated so as to deliver a length of sheet material to said winder unit on completion of the winding of each roll without stopping the forward feed of the web material.

Abstract: A rewinding machine for producing logs of web material is described which includes a winding unit; a feed path of the web material towards the winding unit; a severing device to sever the web material upon completion of winding each log; and a glue dispenser to apply a glue to the web material. The machine also includes a diverter member disposed and controlled to temporarily divert the web material towards the glue dispenser.

Abstract: To close the tail end (L) of the web material forming the log (R) there is provided mechanical ply-bonding between the tail end and a portion of the last turn of web material, preferably a portion forming a fold (F) projecting from the log.

Abstract: The rewinding machine includes a winding system and a feed path for a web material towards the winding system. Along the feed path is a channel for insertion of the cores and an interruption member which acts on the web material.

Abstract: A method is described for obtaining a coreless roll (R) of web material with a first portion of web material forming an inner nucleus (R1) of said roll and a second portion of web material (R2) wound around the outside of said nucleus. The two portions (R1, R2) can be separated from one another and, for said purpose, an interface or discontinuity is created in at least one turn of the web material forming the roll, between said inner nucleus and said second portion of web material, so as to facilitate the extraction of the inner nucleus from the outer portion of the roll.

Abstract: The rewinding machine comprises: a first winding roller (11) and a second winding roller (13) defining a nip (15) through which said cores are inserted and through which said web material (N) is fed; and at least one pair of motorized engaging members (57), to engage the ends of a winding core and transmit a rotational movement to the core during at least part of the winding cycle of each log. The engaging members and the first and second winding roller are produced and disposed so that the log being formed is in contact with said first and said second winding roller. Moreover, a third winding roller (17) is provided, defining a winding space with said first and said second winding roller, said third winding roller being movable to allow increase and completion of winding of each log in said winding space.

Abstract: The rewinding machine includes a winding unit; a feed path of a web material; a separator device to sever the web material upon completion of winding each log; an insertion path of the winding cores towards the winding unit; a movable mechanical member to facilitate forming a first turn of web material around each winding core inserted in the insertion path.

Abstract: The machine for producing tubes includes a winding spindle around which strips of weblike material are wound to form the tube, which is made to advance along the spindle; a device for supply and winding of the strips around the spindle, and at least one knife for cutting lengths of the tube being formed. The knife is provided with a reciprocating movement parallel to the spindle. There is moreover envisaged a counter-knife within the tube being formed, provided with a movement of translation synchronized to the movement of translation of the knife. The counter-knife is magnetically constrained to a mover member, which transmits the motion to the counter-knife.

Abstract: The rewinding machine includes a path for insertion of tubular cores; a winding cradle; a first moving member designed to be in contact with the web material to be wound; a rolling surface forming, with the first moving member, a channel for passage of the tubular cores; and an insertion device to insert the cores in the channel. At the inlet of the insertion channel there is a second moving member, opposed to the first moving member, the core insertion path passing between the first and the second moving members. The two moving members are arranged at a distance such that a core inserted between them is in contact with the second moving member and with the web material entrained around the first moving member.

Abstract: Described herein is a rewinding machine for the production of rolls (L) of weblike material around winding cores, including a path for the weblike material (N) and a winding area, in which said weblike material is wound in rolls. The machine moreover comprises a feeder for feeding a sheetlike material (F) towards the path of the weblike material, and forming members (13, 15) for rolling a length of said sheetlike material and forming therewith a winding core around which a roll of weblike material is formed.

Abstract: The machine for producing tubes includes a winding spindle, around which strips of weblike material are wound to form the tube, which is made to advance along the spindle; a device for supply and winding of the strips around the spindle, and at least one knife for cutting lengths of the tube being formed. The knife is provided with a reciprocating movement parallel to the spindle. There is moreover envisaged a counter-knife within the tube being formed, provided with a movement of translation synchronized to the movement of translation of the knife. The counter-knife is magnetically constrained to a mover member, which transmits the motion to the counter-knife.

Abstract: To close the tail end (L) of the web material forming the log (R) there is provided mechanical ply-bonding between the tail end and a portion of the last turn of web material, preferably a portion forming a fold (F) projecting from the log.

Abstract: A rewinder machine for the production of rolls of web material is described, comprising: a winder unit (3, 5, 7); a path for delivering the web material (N) to said winder unit; a system for continuously feeding said web material into said winder unit; a distributor (31) of a sheet material (F) for wrapping the rolls formed by said winder unit, installed and operated so as to deliver a length of sheet material to said winder unit on completion of the winding of each roll without stopping the forward feed of the web material.

Abstract: A rewinding machine for producing logs of web material is described which includes a winding unit; a feed path of the web material towards the winding unit; a severing device to sever the web material upon completion of winding each log; and a glue dispenser to apply a glue to the web material. The machine also includes a diverter member disposed and controlled to temporarily divert the web material towards the glue dispenser.

Abstract: The unwinding device to unwind reels of web material includes: unwinding members to simultaneously unwind a first reel and a second reel; a splicing device to join together a first web material coming from the first reel and a second web material coming from the second reel; at least one accumulation member to accumulate the web material delivered from the second reel before splicing with the web material delivered from the first reel; a first path and a second path for the web material delivered simultaneously from the first and from the second reel towards a machine downstream.

Abstract: The rewinding machine includes a winding unit; a feed path of a web material; a separator device to sever the web material upon completion of winding each log; an insertion path of the winding cores towards the winding unit; a movable mechanical member to facilitate forming a first turn of web material around each winding core inserted in the insertion path.

Abstract: The rewinding machine includes: a winding unit; a feed path of the web material; an insertion path of the winding cores; a separator device to sever the web material upon completion of winding each log. The separator device is disposed and produced to be activated by passage of a winding core.

Abstract: The rewinding machine comprises: winding elements (1, 3, 5) to wind the web material (N) and form the logs (L1, L2); at least a first glue dispenser (31B) to apply a first glue (C2) to a portion of said web material, in proximity to a severing line, along which the web material is severed upon termination of winding a log. The first glue dispenser comprises a mechanical element (31B) that touches the web material (N) upon termination of winding each log (L1, L2), to transfer the first glue to the web material (N).

Abstract: A method is described for obtaining a coreless roll (R) of web material with a first portion of web material forming an inner nucleus (R1) of said roll and a second portion of web material (R2) wound around the outside of said nucleus. The two portions (R1, R2) can be separated from one another and, for said purpose, an interface or discontinuity is created in at least one turn of the web material forming the roll, between said inner nucleus and said second portion of web material, so as to facilitate the extraction of the inner nucleus from the outer portion of the roll.

Abstract: The rewinding machine includes a path for insertion of tubular cores; a winding cradle; a first moving member designed to be in contact with the web material to be wound; a rolling surface forming, with the first moving member, a channel for passage of the tubular cores; and an insertion device to insert the cores in the channel. At the inlet of the insertion channel there is a second moving member, opposed to the first moving member, the core insertion path passing between the first and the second moving members. The two moving members are arranged at a distance such that a core inserted between them is in contact with the second moving member and with the web material entrained around the first moving member.