Abstract: A reel unwinder including a first unwinding position, in which a first reel is positioned; a second unwinding position, to which the first reel is transferred when it is replaced with a second reel; a stand-by position, in which the second reel is kept in stand-by; a first unwinding member adapted to start rotation of the second reel when the first reel is replaced with the second reel. Moreover, the unwinder includes a second unwinding member, with at least one endless flexible element. The endless flexible element extends from the first unwinding position to the second unwinding position, and is adapted to maintain the first reel in contact with the second unwinding member and in rotation by the second unwinding member in the first unwinding position, in the second unwinding position and while it is being transferred from the first unwinding position to the second unwinding position.

Abstract: A reel unwinder including a first unwinding position, in which a first reel is positioned; a second unwinding position, to which the first reel is transferred when it is replaced with a second reel; a stand-by position, in which the second reel is kept in stand-by; a first unwinding member adapted to start rotation of the second reel when the first reel is replaced with the second reel. Moreover, the unwinder includes a second unwinding member, with at least one endless flexible element. The endless flexible element extends from the first unwinding position to the second unwinding position, and is adapted to maintain the first reel in contact with the second unwinding member and in rotation by the second unwinding member in the first unwinding position, in the second unwinding position and while it is being transferred from the first unwinding position to the second unwinding position.

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 device comprises at least a continuous movable flexible member (23) carrying a series of contact members (29, 29A, 29B) for the products (R; R1; RN) aligned with one another. A section of the movable flexible member is devoid of said contact members to allow the trimmings (Rc, Rt) to fall. At least a longitudinal supporting element (21) of the products (R; R1, RN), is also provided, parallel to the movable flexible member, the reciprocal position of said flexible member and of said longitudinal element being such that the products advance in contact with the contact members (29, 29A, 29B) of the flexible member and with the longitudinal element. A pusher (11) inserts the series of products with the respective trimmings between the flexible member and the longitudinal supporting member. The flexible member (23) is controlled with a variable speed to carry the section thereof devoid of contact members time by time to the level of the head and tail trimmings (Rc; Rt) of two consecutive series of products.

Abstract: The device includes a supporting surface, with an initial curved surface portion, and a substantially flat surface portion. Above the supporting surface, extends at least part of a first path and of a second path of a first ply and of a second ply. The two paths are disposed adjacent to the supporting surface and the initial curved surface portion has a convexity facing the first path. Also provided is a system to supply air between the first path of the first ply and the supporting surface, to help support the web material with respect to the supporting surface.

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: 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: A pressure roller (3; 7) for devices for processing continuous web materials is described, comprising a lateral surface (3S; 7S), including a regulating system (29, 50) to impose an adjustable crown of the lateral surface (3S; 7S) of the roller deforming said lateral surface.

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 printing machine comprises a central roller (3); at least one printing unit (5) with a cliché roller (7) and means (9, 13) for applying ink to the cliché roller. A control unit (50) in also provided, interfaced with at least one actuator (19) to move the printing unit towards the central roller. The printing unit (5) comprises at least one load sensor (41) and at least one position transducer (43) associated with the cliché roller, interfaced with the control unit. This latter is programmed to perform a calibration of the printing unit with a first step to move the printing unit towards the central roller until reaching a zero position defined on the basis of a signal of said at least one load sensor.

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 plant comprises in combination at least one winder (3) which receives at least one web material and produces large diameter reels (B) by winding said web material around winding mandrels (M); at least one unwinder (9) which unwinds said large diameter reels (B) and feeds the web material to a transformation line (15, 21, 23); a plurality of carriages (11), which transfer said reels from a loading station (7) towards said unwinder (9), support said reels in the unwinder during unwinding and convey the finished mandrels towards a recovery area.

Abstract: The unwinder device comprises: unwinding members for simultaneously unwinding a first reel (B1) and a second reel (B2), a splicing device (151) for splicing together a first web-like material (N1) coming from said first reel (B1) and a second web-like material (N2) coming from said second reel (B2), an accumulator member (24, 200) for accumulating web-like material (N2) supplied from said second reel (B2) before splicing to the web-like material (N1) supplied from said first reel (B1).

Abstract: The device comprises: supports (3A, 5A; 3B, 5B) to support at least a reel (B1) in an unwinding position; at least a peripheral drive mechanism which acts on the cylindrical surface of the reel being unwound and transmits peripherally to said reel a torque to draw it in rotation; and at least a center drive mechanism (41) which transmits centrally to said reel an auxiliary torque to draw it in rotation together with the torque transmitted by the peripheral drive mechanism.

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 control device comprises: at least one member (12; 12X) for regulating the speed of advance on the weblike material; a central control unit (41); a guiding roller (31) with mobile axis, over which the weblike material is run; and a position transducer (39) for detecting the position of the guiding roller (31) and for generating a position signal for controlling the speed of said weblike material. The guiding roller (31) is supported in a controlled position, and associated thereto is at least one sensor (37) for detecting a load (F) applied by the weblike material (N) on the guiding roller (31). In addition, an actuator (43) controls a displacement of the guiding roller according to a feedback signal generated by the sensor (37).

Abstract: The machine comprises in combination: a winding cradle (7); an insertion member (29) to insert winding cores (A, A1) into said cradle; an ejector (39) to eject the logs formed from said cradle (7) causing them to roll on an unloading chute (41); a severing device (55, 53) to sever the web material after ejection of the log from said cradle. Disposed along the unloading chute is an aperture (43) elongated in a direction transverse to the direction in which the log is unloaded along said unloading chute. Moreover, the severing device (53, 55) includes a movable element (55) that is inserted into said aperture (43) to cause severing of the web material between the cradle and the finished log.

Abstract: The unwinder device includes an unwinding station (7), with unwinding members for unwinding reels and a splicing device (151) for splicing together web-like materials (N1 and N2) coming from a first reel (B1) and from a second reel (B2). At least two supports (49, 51) are arranged in the unwinding station for the respective reels of web-like material, associated with respective unwinding members (83, 99). The supports are constructed and arranged to simultaneously support two reels being unwound, during at least a phase of the unwinding, and each of said supports is able and constructed to load a new reel in an engagement position, support it during the unwinding and unload it in a release position.

Abstract: The rewinder machine comprises: a first winding roller (3); a second winding roller (5), defining with said first winding roller (3) a winding cradle; a feeder (33) for sequentially introducing winding cores to said winding cradle; an optional glue applicator (21) for applying glue to said cores. The feeder (33) may include an element (39) for applying glue to the winding cores while they are being fed to said winding cradle. In a special embodiment, the feeder is mechanically linked to a system for unloading the roll from the winding cradle.

Abstract: The device includes a supporting surface, with an initial curved surface portion, and a substantially flat surface portion. Above the supporting surface, extends at least part of a first path and of a second path of a first ply and of a second ply. The two paths are disposed adjacent to the supporting surface and the initial curved surface portion has a convexity facing the first path. Also provided is a system to supply air between the first path of the first ply and the supporting surface, to help support the web material with respect to the supporting surface.