The present invention concerns a method for joining the ply of a reel of paper in depletion with the initial flap of a new reel, as well as an apparatus adapted for carrying out such a method. Thanks to the method according to the present invention, and to the apparatus suitable for carrying it out, the joining of the reels takes place without using gluing means, like for example the double-sided tape used in known methods, avoiding the relative drawbacks, the adhesion between the plies of the reels to be joined taking place by electrostatic attraction.

The present application relates to a roll replacing device and a tab welding apparatus. The roll replacing device includes an unwinding mechanism, a first fixing mechanism, a second fixing mechanism, a cutting mechanism, and a strip connection mechanism; wherein the first fixing mechanism is capable of following a sliding bracket to move along a first direction until a spare material strip fixed by the first fixing mechanism and a working material strip fixed by the second fixing mechanism are aligned at a strip connection station, and allows the strip connection mechanism to connect the working material strip and the spare material strip which are aligned at the strip connection station.

The apparatus for combining tobacco sheets comprises a first shaft for carrying a first bobbin of tobacco sheet and a second shaft for carrying a second bobbin of tobacco sheet. The apparatus also comprises a splicing unit for combining an end portion of tobacco sheet from the first bobbin to a head portion of tobacco sheet from the second bobbin. The splicing unit comprises a cutting device for cutting the tobacco sheets such as to provide complementary cuts to the tobacco sheets from the first bobbin and from the second bobbin, a dispensing device for dispensing water to at least one of the tobacco sheets, and a combining device for applying force onto the tobacco sheets thereby producing a spliced tobacco sheet.

A joint for joining ends of at least two fiber webs together, the joint being formed of at least one cut provided to penetrate through the ends of the fiber webs in an overlapping position, which cut has at least one side part and from the side part extending at least one substantially straight part and which cut, which forms at least one flap, being configured to remain attached to the fiber webs by at least one folding line substantially aligned with the direction of the movement of the fiber webs.

The present invention concerns a method for joining the ply of a reel of paper in depletion with the initial flap of a new reel, as well as an apparatus adapted for carrying out such a method.

Thanks to the method according to the present invention, and to the apparatus suitable for carrying it out, the joining of the reels takes place without using gluing means, like for example the double-sided tape used in known methods, avoiding the relative drawbacks, the adhesion between the plies of the reels to be joined taking place by electrostatic attraction.

The apparatus for combining tobacco sheets comprises a first shaft for carrying a first bobbin of tobacco sheet and a second shaft for carrying a second bobbin of tobacco sheet. The apparatus also comprises a splicing unit for combining an end portion of tobacco sheet from the first bobbin to a head portion of tobacco sheet from the second bobbin. The splicing unit comprises a cutting device for cutting the tobacco sheets such as to provide complementary cuts to the tobacco sheets from the first bobbin and from the second bobbin, a dispensing device for dispensing water to at least one of the tobacco sheets, and a combining device for applying force onto the tobacco sheets thereby producing a spliced tobacco sheet.

The present application relates to a roll replacing device and a tab welding apparatus. The roll replacing device includes an unwinding mechanism, a first fixing mechanism, a second fixing mechanism, a cutting mechanism, and a strip connection mechanism; wherein the first fixing mechanism is capable of following a sliding bracket to move along a first direction until a spare material strip fixed by the first fixing mechanism and a working material strip fixed by the second fixing mechanism are aligned at a strip connection station, and allows the strip connection mechanism to connect the working material strip and the spare material strip which are aligned at the strip connection station.

A method for splicing two sheets of material containing alkaloids is provided, the method including: providing a first sheet of material containing alkaloids wound in a first bobbin; providing a second sheet of material containing alkaloids wound in a second bobbin; unwinding the first sheet wound in the first bobbin; evaluating one or more of the following parameters of the unwound first sheet: moisture, thickness, width, stickiness, and presence or absence of holes or tears; and depending on a value of the evaluated one or more parameters, unwinding the second sheet wound in the second bobbin, and splicing the first sheet and the second sheet. A system for splicing two sheets of material containing alkaloids is also provided.

A material-joining device is provided for joining a trailing end of a first material sheet to a leading end of a new supply of material sheeting. The joining device comprises a main body and a gate coupled to the main body. A plurality of rods are moveably held within the main body along with at least one actuator coupled to the plurality of rods. The actuators can move the rods from a retracted position to an extended position. The gate includes a plurality of chambers aligned with the rods. The chambers accommodate a portion of the rods when in the extended position. Using the material-joining device, at least portions of the first material and the new supply of material fit within the space between the main body and the gate. When the at least one actuator moves the rods to the extended position, the separate material sheets are joined together.