Abstract: An interfolding machine produces interfolded sheets according to an interfolding configuration and, starting from a web of paper provides a feeding section, which applies a tension on the web and moves the same along a feeding direction feeding the same to a cutting section, in which the web of paper is cut into a series of sheets at a cutting point between a cutting roller and a counter-cutting element. Downstream of the cutting section, a folding section includes a first and a second folding rollers counter-rotating with respect to each other. The first and second folding rollers rotate about respective rotation axes with a first peripheral velocity vP, and fold, at a folding zone, a plurality of sheets in a plurality of panels and form the stack of interfolded sheets. The cutting roller alternately distributes the aforementioned sheets between a transfer roller and the first folding roller.

Abstract: A folding, or interfolding, unit, for folding, or interfolding, a first and a second plurality of sheets of paper in a machine for converting paper, comprises a first and a second folding, or interfolding, counter-rotating rolls configured to rotate about a respective longitudinal rotational axis and providing a plurality of suction holes. A vacuum generation device and a vacuum distribution device are, furthermore, provided for selectively putting into pneumatic communication the vacuum generation device with at least a row of the aforementioned suction holes. The folding, or interfolding, unit, comprises, furthermore, a first and a second cutting device providing, respectively, at least a first and a second cutting blade which cooperates with a first and a second plurality of counter-blades distributed along the folding, or interfolding rolls in order to cut a first and a second web of paper, in the first and in the second plurality of sheets.

Abstract: An interfolding machine (1) for producing stacks (100) of interfolded sheets according to a predetermined interfolding configuration, starting from a web (50) of paper, or similar materials, provides a feeding section (10), which provides to apply a tension on the web (50) and to move the same along a feeding direction (101) to feed the same to a cutting section (20), in which the web of paper (50) is cut into a series of sheets (11) of length predetermined, at a cutting point arranged between a cutting roller (25) and a counter-cutting element (26). Downstream of the cutting section (20) a folding section (30) is provided comprising a first and a second folding rollers (31,32) counter-rotating one with respect to the other.

Abstract: A folding, or interfolding, unit, (100) for folding, or interfolding, a first and a second plurality of sheets of paper (105a, 105b) in a machine for converting paper, comprises a first and a second folding, or interfolding, counter-rotating rolls (1a, 1b) configured to rotate about a respective longitudinal rotational axis (110a, 110b) and providing a plurality of suction holes (11a, 11b, 12a, 12b). A vacuum generation device and a vacuum distribution device (40a, 40b) are, furthermore, provided for selectively putting into pneumatic communication the vacuum generation device with at least a row of the aforementioned suction holes (11a, 11b, 12a, 12b).

Abstract: The folding roller includes a rotation axis and at least a gripping member extending longitudinally along the folding roller, controlled by at least a piezoelectric actuator. The piezoelectric actuator causes a pivoting movement of the gripping member about its pivoting axis parallel to the rotation axis of the folding roller.

Abstract: A converting line for processing tissue paper includes an unwinder for unwinding reels of tissue paper; a rewinding machine for forming rolls of tissue paper; a feeding path between the unwinder and the rewinding machine, for at least one ply of tissue paper; along the feeding path, a first detection unit to detect the thickness of the tissue paper fed along the feeding path in a feeding direction; a control system, interfacing with the detection unit, and configured to act on at least one production parameter of the converting line based on the detected tissue paper thickness.

Abstract: The folding roller includes a rotation axis and at least a gripping member extending longitudinally along the folding roller, controlled by at least a piezoelectric actuator. The piezoelectric actuator causes a pivoting movement of the gripping member about its pivoting axis parallel to the rotation axis of the folding roller.

Abstract: The interfolding machine includes a first interfolding roller rotating around a first rotation axis and a second interfolding roller rotating around a second rotation axis parallel to the first rotation axis; wherein the first interfolding roller and the second interfolding roller form an interfolding nip therebetween. The interfolding machine further includes a first set of separation fingers associated with the first interfolding roller and arranged for reciprocatingly pivoting around a first pivoting axis parallel to the first rotation axis. The reciprocating pivoting movement of the first set of separation fingers is controlled by a first actuation mechanism including a first desmodromic cam. The interfolding machine also includes a second set of separation fingers associated with the second interfolding roller and arranged for reciprocatingly pivoting around a second pivoting axis parallel to the second rotation axis.

Abstract: A converting line for processing tissue paper includes an unwinder for unwinding reels of tissue paper; a rewinding machine for forming rolls of tissue paper; a feeding path between the unwinder and the rewinding machine, for at least one ply of tissue paper; along the feeding path, a first detection unit to detect the thickness of the tissue paper fed along the feeding path in a feeding direction; a control system, interfacing with the detection unit, and configured to act on at least one production parameter of the converting line based on the detected tissue paper thickness.

Abstract: The device includes a feed path for the products, along which the products move forward, divided into single packs with the interposition of at least one separator finger between one pack and the next; an oscillating support to receive packs of products and tip them onto a conveyor below; a front retaining element, which can be inserted and removed with respect to the feed path of the products to frontally retain the pile of products while the oscillating support performs an oscillation movement and deposits a pack on the conveyor below. The front retaining element is inserted in a space formed between the first and the second pack of the pile. The space is obtained by oscillating the support downwards. The oscillating support moves downwards by a first downwards angular movement and a second angular movement.

Abstract: The unwinding device comprises: a rotating element (3) with supports (13, 15) for at least two reels (B1; B2; B3); a splicing member (31, 33, 35) to join a first web material (N1) coming from an expiring reel (B1) to the initial free end (T) of a second web material (N2) wound on a new reel (B2). At least one mechanical member (21) is associated with each support (13; 15), to retain the initial free end (T) of the reel disposed on the support, to hold the initial free end until splicing of the two web materials.

Abstract: The unwinding device comprises: a rotating element (3) with supports (13, 15) for at least two reels (B1; B2; B3); a splicing member (31, 33, 35) to join a first web material (N1) coming from an expiring reel (B1) to the initial free end (T) of a second web material (N2) wound on a new reel (B2). At least one mechanical member (21) is associated with each support (13; 15), to retain the initial free end (T) of the reel disposed on the support, to hold the initial free end until splicing of the two web materials.

Abstract: The folding machine comprises; a pair of counter-rotating folding cylinders (1, 3), each provided with at least one gripping member (43) to fold a continuous web material (N) in a zigzag manner; and a cutting member (60) disposed in front of the folding cylinders to cut the zigzag folded web material and divide it into two piles (M) of folded articles. Each gripping member is a suction member which retains the web material by suction at the level of the respective folding line.

Abstract: The folding machine comprises a pair of folding rollers (1, 3) rotating about axes essentially parallel to each other and defining a nip (5) through which a web material (N) to be folded passes. Disposed on each of the folding rollers are folding members (61, 61A; 63, 63A) which form folds on the web material parallel to the axis of rotation of the folding rollers. For each folding roller (1, 3) a transferring device (11, 13) is also provided to transfer packs of products folded by the folding rollers towards an unloading area (9), which comprises a plurality of separating fingers (15) movable along a closed path, from an area of engagement with the folded products to an unloading area of the folded products. Each of the transferring devices extends inside an annular groove (1G, 3G) of the respective folding roller (1, 3).

Abstract: The folding machine comprises at least one folding cylinder (1, 3; 505) provided with at least one gripping member (43; 513) to mechanically grasp the web material (N) along a folding line. An electrostatic attraction member (79; 515) is associated with the gripping member (43; 513) to attract the web material towards said gripping member (43; 513).

Abstract: The device comprises a guide (23) defining a closed for a plurality of separator fingers (15). In the vicinity of the end of the advance stretch of the guide is set a separating member (101) provided with a movement of insertion and extraction (f103) with respect to the pile of products (P, P1, P2), synchronized with the movement of advance of the products along the path of advance, so as to insert itself between two contiguous packs of laminar products (M1, M2), between which is inserted a respective separator finger (15), and to withhold temporarily the pile of laminar products whilst said separator finger (15) is moved away from the path of advance.

Abstract: The folding machine comprises a pair of folding rollers (1, 3) rotating about axes essentially parallel to each other and defining a nip (5) through which a web material (N) to be folded passes. Disposed on each of the folding rollers are folding members (61, 61A; 63, 63A) which form folds on the web material parallel to the axis of rotation of the folding rollers. For each folding roller (1, 3) a transferring device (11, 13) is also provided to transfer packs of products folded by the folding rollers towards an unloading area (9), which comprises a plurality of separating fingers (15) movable along a closed path, from an area of engagement with the folded products to an unloading area of the folded products. Each of the transferring devices extends inside an annular groove (1G, 3G) of the respective folding roller (1, 3).

Abstract: The napkin comprises at least a first ply and a second ply joined together by gluing. At least one of the plies is embossed and a glue is applied to at least some of the embossing protuberances. A printed pattern differentiates an edge area or border (B) with respect to a central area surrounded by the edge.

Abstract: The folding machine includes at least one folding rollers (1, 3; 505) provided with a least one gripping member (43; 513) to mechanically grip the web material (N) along a folding line. A suction member (79; 515) is associated with the gripping member (43; 513) to draw the web material towards said gripping member (43; 513).

Abstract: The device comprises an essentially rigid smooth first cylinder (1) and an essentially rigid second cylinder 83), the latter having points (3P), the first and second cylinders rotate in opposite directions about respective axes of rotation (1A, 3A) and are pressed against each other, thus defining between themselves a lamination nip (5), through which said at least two layers are passed. There is also a pressure roller 87), with a surface (7A) that is less rigid than the first and second cylinders (1, 3), this roller interacting with the second cylinder and being pressed against it. The pressure roller forms with the second cylinder (3) an embossing nip (9) through which the layers (V1, V2) previously laminated in the lamination nip (5) are passed and in which they are embossed.