Abstract: A method for extracting a core (1) from a reel (2) of paper is described, where the reel (1) has been wound in a winding station upstream of an extraction station (100) of the core (1); the method comprises the steps of providing an extraction element (3) having an expandable element (4), shaped to enter, when in the non-expanded form, within a cavity (5) defined by the inner wall (6) of the core (1) of the reel (2), the core (1) extends according to a central axis (X) which is substantially horizontal when the reel (2) is positioned for extraction; inserting the expandable element (4) of the extraction element (3) in the cavity (5) of the core (1) on which a roll of paper (20) is wound; expanding the expandable element (4) until it engages the inner wall (6) of the core (1); pulling the extraction element (3) in the opposite direction to that of insertion, to extract the core (1) from the reel (2); bring the expandable element (4) back to the non-expanded form; extracting the expandable element (4) from the

Abstract: An unwinder for unwinding reels of paper includes a supporting structure partially closed and defining an internal space suitable for unwinding at least one reel; the supporting structure includes: a first lateral support; a second lateral support spaced from the first support; a crosspiece interposed above between the first and the second support defining with the first support and second support the partially closed structure; the unwinder further includes: a first axial unwinding system placed at the first support and configured to axially unwind a first reel; a second axial unwinding system placed at the second support and configured to unwind a second reel; a joining device placed at the crosspiece and configured to make a joint between a first ply belonging to the first reel and a second ply belonging to the second reel to perform a reel exchange.

Abstract: An embossing group includes: a first embossing roller and at least one embossing unit associated with the first roller. The embossing unit includes a second embossing roller, a third embossing roller, and a sleeve surrounding the second roller and the third roller by coupling them. The sleeve faces the first roller and is configured to contact the first roller. The embossing unit and the first roller are configured to emboss at least one paper sheet wound between the first roller and the embossing unit.

Abstract: An embossing group with interchangeable rollers for the surface processing of tissue paper comprises a frame (13) bearing three pairs of steel embossing rollers (17), each pair being movable between a first operative position for embossing two paper plies (11, 12) and rest positions, as well as it comprises two rubber-coated rollers (19, 20) which can be coupled with the pair of embossing rollers (17) placed in the operative position, and it further comprises two pairs of rotating supports (14, 15), wherein each one is provided with three arms (16), each one bearing at the end a locking element (18) for one end of an embossing roller (17), the rotating supports (14, 15) being constrained to the frame (13) rotating around their own central axis.

Abstract: Described is a log ejection group in a rewinding machine that includes an unloading plane of wound logs and a means for slowing down the logs associated with the unloading plane. The slowing down means includes a motorized upper inlet roller to intercept the logs arriving on the unloading plane and a pair of motorized handling rollers located downstream of the upper inlet roller. The pair includes an upper handling roller and a lower handling roller. The lower handling roller is integrated into the unloading plane. The upper inlet roller and the upper handling roller are arranged on an upper structure, which is adjustable in height. The angular speed of the upper inlet roller is greater than the angular speed of the upper handling roller. A method for ejecting a log using the log ejection group is also described.

Abstract: Disclosed herein is an extraction assembly for producing coreless logs. The extraction assembly includes a rectilinear transporter (20) of a log (11) wound about a disintegrable core (12), and a gripping device (30) for a portion of the core (12) projecting from the log (11), wherein the rectilinear transporter (20) has a transverse transport direction with respect to a log advancement direction of the log (11) along the converting line (100), and has an alternating transport direction back and forth in opposite directions, and the rectilinear transporter (20) contains a first portion for being received within the converting line (100), and a second portion for being placed outside the converting line (100), in which the second portion is aligned with respect to the first portion along the transverse transport direction. Also disclosed herein are a converting line containing the extraction assembly, and methods for producing coreless logs.

Abstract: An embossing group with interchangeable rollers for the surface processing of tissue paper comprises a frame (13) bearing three pairs of steel embossing rollers (17), each pair being movable between a first operative position for embossing two paper plies (11, 12) and rest positions, as well as it comprises two rubber-coated rollers (19, 20) which can be coupled with the pair of embossing rollers (17) placed in the operative position, and it further comprises two pairs of rotating supports (14, 15), wherein each one is provided with three arms (16), each one bearing at the end a locking element (18) for one end of an embossing roller (17), the rotating supports (14, 15) being constrained to the frame (13) rotating around their own central axis.

Abstract: Disclosed herein is an extraction assembly for producing coreless logs. The extraction assembly includes a rectilinear transporter (20) of a log (11) wound about a disintegrable core (12), and a gripping device (30) for a portion of the core (12) projecting from the log (11), wherein the rectilinear transporter (20) has a transverse transport direction with respect to a log advancement direction of the log (11) along the converting line (100), and has an alternating transport direction back and forth in opposite directions, and the rectilinear transporter (20) contains a first portion for being received within the converting line (100), and a second portion for being placed outside the converting line (100), in which the second portion is aligned with respect to the first portion along the transverse transport direction. Also disclosed herein are a converting line containing the extraction assembly, and methods for producing coreless logs.