Abstract:
The rewinding machine comprises: a winding unit (1, 3, 5); a feed path of the web material; an insertion path of the winding cores (A); a separator device (25) 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 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:
A method for producing logs (Ll, L2) of web material (N) wound around tubular cores wherein the tubular core (Al-A4) is equipped with glue to secure the initial end of the web material and allow winding. Part of the glue applied to the tubular core is transferred to the web material (N) before it is severed upon termination of winding the log, to seal the final free end of the formed log.
Abstract:
The rewinding machine comprises a first winding cradle, formed between a first winding roller (1), a second winding roller (3) and a third winding roller (7), and a second winding cradle formed between the first winding roller (1), the second winding roller (3) and a fourth winding roller (8). The first winding roller (1) and the second winding roller (3) define a nip (5) through which nip the winding cores, around which the web material is found, pass and the web material is fed towards a roll being formed in the second winding cradle. A severing member (24) is furthermore provided, acting on the web material (N) between a winding core (A) and the nip (5), to sever the web material thus generating a tail edge (Lf) of a completed roll and a leading edge (Li) of a new roll to be wound.
Abstract:
A rewinding machine (2) is described with a winding cradle defined by three rollers (1, 3, 7) and comprising a fourth winding roller 21, defining with the first winding roller (1) a cradle in which the web material (N) is pushed by a winding core (A2) to the beginning of each winding cycle, to cause severing of the web material without the need for controlled mechanical parts.
Abstract:
The rewinding machine comprises: a first winding roller (1), around which the web material (N) is guided, and defining at least in part a winding cradle; a sup¬ port surface (11) of the winding cores (A), arranged to receive a winding core and to convey it toward the winding cradle, the support surface defining with the first wind¬ ing roller (1) a feed channel (9) of winding cores (A); a severing member (17) of the web material, which can be inserted in the channel to sever the web material, the sev¬ ering member interacting with the web material to cause severing thereof; a motor (19) for controlling the severing member, the motor controlling the severing member modifying the speed of the severing member when it is positioned inside the channel (9)·
Abstract:
The protective masks (1) are produced by perforating a continuous web material. To this end, each protective mask can be separated from the other masks along perforation lines (1.3), and then wound into a roll. The protective masks have transverse perforation lines (1.4) which are opened at the time of use to form openings into which the ears can be inserted and thus secure the protective mask to the face.
Abstract:
The rewinding machine comprises: a winding system (1, 2, 3) and a feed path for a web material (N) towards said winding system. Positioned along the feed path is at least one air jet severing member (23) to cause severing of the web material after winding of each log (R) has terminated.
Abstract:
The unwinding device to unwind reels of web material comprises: unwinding members (505; 525) to simultaneously unwind a first reel (B1) and a second reel (B2); a splicing device (563) to join together a first web material (N1) coming from the first reel (B1) and a second web material (N2) coming from the second reel (B2); at least one accumulation member (540, 541) to accumulate the web material delivered from the second reel before splicing with the web material delivered from the first reel; a first path (585) and a second path (589) for the web material delivered simultaneously from the first and from the second reel towards a machine downstream.
Abstract:
The unwinder comprises: a first unwinding position (P2), in which a first reel (Bl) is positioned; a second unwinding position (P3), to which the first reel is transferred when it must be replaced with a second reel (B2); a stand-by position (PI), in which the second reel (B2) is kept in stand by; a first unwinding member (13) arranged and controlled to start rotation of the second reel (Bl) when the first reel (B2) must be replaced with the second reel (B2). Moreover, the unwinder comprises a second unwinding member (31), with at least one endless flexible element (33). The endless flexible element extends from the first unwinding position (P2) to the second unwinding position (P2), and is arranged and controlled in such a manner that the first reel is maintained in contact with said second unwinding member and in rotation by means of the second unwinding member (31) in the first unwinding position (P2), in the second unwinding position (P3) and while it is being transferred from the first unwinding position (P2) to the second unwinding position (P3).