Abstract: The cutting machine for cutting logs of web material, includes a cutting head arranged along the feeding path of the logs. The cutting head includes a coupling for a disc-shaped cutting blade and is designed to impart the disc-shaped cutting blade a rotary motion around the axis thereof and a cyclic movement to cut the logs into single rolls, and to allow the logs to move forward along the feeding path. The machine also includes a store unit for disc-shaped cutting blades associated with the cutting head. A handling member is provided to remove a worn disc-shaped cutting blade from the cutting head and replace the worn disc-shaped cutting blade with a new disc-shaped cutting blade taken from the store unit.

Abstract: The cutting machine includes at least one feed path for elongated products, wherein the elongated products move forward along a direction substantially parallel to the longitudinal extension thereof. The cutting machine includes a rotating unit adapted to rotate around a rotation axis, carrying at least one first disc-shaped cutting blade and one second disc-shaped cutting blade. The rotation of the rotating unit causes an orbital movement of the first disc-shaped cutting blade and of the second disc-shaped cutting blade along trajectories intersecting the product feed path. The first disc-shaped cutting blade and the second disc-shaped cutting blade are offset from each other in a direction parallel to the product feed path. The first disc-shaped cutting blade and the second disc-shaped cutting blade are also angularly offset from each other with respect to the rotation axis of the rotating unit.

Abstract: The grinding unit includes at least one grinding wheel adapted to rotate around a respective rotation axis, and a thrust actuator adapted to push the grinding wheel against a cutting edge of a disc-shaped cutting blade. A load cell is also provided for detecting an axial thrust exerted on the grinding wheel.

Abstract: The method provides for detecting a temporary stop request by a machine of the line, for example to replace a member subject to wear or a consumable. In view of this stop, the speed of the line is modulated so as to increase, for example, the level of filling of an accumulator, and makes sure that the subsequent temporary stop has a minimum effect on the overall productivity of the line.

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: The machine includes a feeding path for the logs to be cut and a cutting head arranged along the feeding path. The cutting head includes a coupling for a disc-shaped cutting blade and is designed to impart the disc-shaped cutting blade a rotary motion around the axis thereof and a cyclic movement to cut the logs into single rolls, and to allow the logs to move forward along the feeding path. The machine also includes at least a grinding unit, including at least one grinding wheel mounted onto a rotation shaft and co-acting with a side of the disc-shaped cutting blade to grind the cutting edge of the same disc-shaped cutting blade. A controlled approach system is also provided to move the grinding wheel towards the disc-shaped cutting blade.

Abstract: A line is disclosed for producing logs of web material provided with a system for controlling, in real time, one or more parameters of the logs produced by the line and for facilitating any corrective actions. The line includes a rewinder, a feed path for the logs from the rewinder towards at least one station arranged downstream of the rewinder; and a measurement station. The measurement station includes at least a measurement device for measuring at least one parameter of logs randomly selected from the feed path and held in the measurement station, for example a device for measuring the firmness of the logs. The measurement station further includes first transferring members for transferring selected logs from the feed path to the measurement station, and second transferring members for transferring selected logs from the measurement station to the feed path.

Abstract: The cutting machine for cutting logs of web material, includes a cutting head arranged along the feeding path of the logs. The cutting head includes a coupling for a disc-shaped cutting blade and is designed to impart the disc-shaped cutting blade a rotary motion around the axis thereof and a cyclic movement to cut the logs into single rolls, and to allow the logs to move forward along the feeding path. The machine also includes a store unit for disc-shaped cutting blades associated with the cutting head. A handling member is provided to remove a worn disc-shaped cutting blade from the cutting head and replace the worn disc-shaped cutting blade with a new disc-shaped cutting blade taken from the store unit.

Abstract: The packaging machine includes a wrapping tunnel, adapted to form a tube of plastic film around a group of articles and a feed conveyor adapted to feed articles to be packaged toward the wrapping tunnel. An elevator is positioned between the feed conveyor and the wrapping tunnel, and is movable vertically from a lower position, to receive articles coming from the feed conveyor, to a higher height, to transfer articles to the wrapping tunnel. A pusher is arranged to push articles to be packaged from the elevator into the wrapping tunnel. An auxiliary conveyor is also provided between the feed conveyor and the elevator. An upender is associated with the auxiliary conveyor, adapted to be arranged selectively in an active position, to co-act with the auxiliary conveyor to upend articles coming from the feed conveyor and transfer them toward the elevator, and in a deactivated position.

Abstract: The magazine for embossing rollers includes a plurality of support seats for embossing rollers, adjacent to one another according to an alignment direction. The magazine further includes a guide system for guiding the seats in a handling direction. The seats are provided with mutual connecting members so as to be connected to, and released from, one another.

Abstract: The packaging machine includes a wrapping tunnel, adapted to form a tube of plastic film around a group of articles and a feed conveyor, adapted to feed articles to be packaged toward the wrapping tunnel. An elevator is positioned between the feed conveyor and the wrapping tunnel, and is movable vertically from a lower position, to receive articles coming from the feed conveyor, to a higher height, to transfer articles to the wrapping tunnel. A pusher is arranged to push articles to be packaged from the elevator into the wrapping tunnel. An auxiliary conveyor is also provided between the feed conveyor and the elevator. An upender is associated with the auxiliary conveyor, adapted to be arranged selectively in an active position, to co-act with the auxiliary conveyor to upend articles coming from the feed conveyor and transfer them toward the elevator, and in a deactivated position.

Abstract: The grinding unit includes a slide provided with a movement towards and away from the disc-shaped cutting blade. On the slide, at least a first grinding wheel and a second grinding wheel are arranged so as to act on a first flank and on a second flank of a cutting edge of the disc-shaped cutting blade. The first grinding wheel and the second grinding wheel are respectively carried by a first arm and by a second arm that are mounted so as to rotate around a respective rotation axis with respect to the slide (115) in order to move towards and away from the disc-shaped cutting blade. The first arm and the second arm are associated with angular locking members adapted to lock the first arm and the second arm in a respective operative angular position with respect to the slide.

Abstract: The machine includes a feeding path for the logs to be cut and a cutting head arranged along the feeding path. The cutting head includes a coupling for a disc-shaped cutting blade and is designed to impart the disc-shaped cutting blade a rotary motion around the axis thereof and a cyclic movement to cut the logs into single rolls, and to allow the logs to move forward along the feeding path. The machine also includes at least a grinding unit, including at least one grinding wheel mounted onto a rotation shaft and co-acting with a side of the disc-shaped cutting blade to grind the cutting edge of the same disc-shaped cutting blade. A controlled approach system is also provided to move the grinding wheel towards the disc-shaped cutting blade.

Abstract: The wrapping machine includes a feed path of products to be wrapped in a wrapping sheet and, along the feed path, an insertion station of products to be wrapped in a wrapping sheet and folding members of the wrapping sheet). The machine further includes a conveyor device, which receives the products in the insertion station and causes their feed through the folding members. The conveyor device includes a system of endless flexible members formed by toothed belts guided around toothed wheels. Each toothed belt includes a first series of internal teeth, cooperating with toothed guide wheels, and a second series of external teeth, cooperating with connection elements of carriages that carry prongs for feeding the products to be wrapped. The connection elements include toothed profiles complementary to the external teeth of the toothed belts, suitable to provide a shape coupling with the external teeth of the respective toothed belts.

Abstract: The system includes a fence inside which machines are arranged that are potentially dangerous for the operators, forming part of a processing plant for processing web material and producing rolls. A passage counting the number of operators entering the fence and exiting therefrom is so controlled as to be accessible only when the machines are not working and to allow a partial operation of the machines inside the fence under particular safety conditions.

Abstract: The rewinding machine includes a first winding cradle, formed between a first winding roller, a second winding roller and a third winding roller, and a second winding cradle formed between the first winding roller, the second winding roller and a fourth winding roller. The first winding roller and the second winding roller define a nip 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 is furthermore provided, acting on the web material between a winding core and the nip, to sever the web material thus generating a tail edge of a completed roll and a leading edge of a new roll to be wound.

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 machine for closing the tail end of logs of web material, includes an advancing path of the logs and, along the log advancing path, a tail end unwinding, positioning and sealing station. The tail end unwinding, positioning and sealing station includes an aperture that extends downwards from an inlet under the log advancing path. At least a first Coanda effect nozzle is placed at the inlet of the aperture, to generate a flow of air adapted to draw into the aperture the tail end of a log that is in the tail end unwinding, positioning and sealing station.

Abstract: The pack includes a geometrically ordered group of one or more rolls; a wrapping sheet that laterally wraps the group of rolls and forms folded flaps on two substantially flat and opposite faces of the pack. A respective adhesive sheet is applied to the folded flaps of at least one of the two substantially flat and opposite faces.

Abstract: The method provides for detecting a temporary stop request by a machine of the line, for example to replace a member subject to wear or a consumable. In view of this stop, the speed of the line is modulated so as to increase, for example, the level of filling of an accumulator, and makes sure that the subsequent temporary stop has a minimum effect on the overall productivity of the line.