Abstract: Roll changer for feeding a material web wound on a material roll (2, 3, 4) into a web-processing machine having a support frame (1), in which at least one material roll (2, 3, 4) is mounted so it is rotatable around its rotational axis, at least three material rolls (2, 3, 4) being provided, whose rotational axes (R) are each oriented parallel to one another, and which are situated so they are pivotable around a shared pivot axis (D) parallel to their rotational axes (R). Preferably, a pair of support arms (6) is provided in each case for the rotatable mounting of the material rolls (2, 3, 4) around their particular rotational axis (R), between which the particular material roll (2, 3, 4) is mounted so it is rotatable, and which each project radially from the pivot axis (D) parallel to the particular rotational axis (R). According to the present invention, a roll drive (23) is provided in the unwinding area, which sets the material roll (2) located in the unwinding area into rotation, or brakes it.

Abstract: Method and device for bonding the outgoing end section (3) of a first material web (1), which extends in a horizontal transport plane (T) along a horizontal transport direction (t) over a web-processing machine, to the incoming starting section (4) of a second material web (2), which is located in a reserve area (27). An intake device (9) is provided for this purpose, in which an end section (3) of the first material web (1) implemented as a free end is held horizontally at the end, the intake device (9) being equipped with a bonding device (10) movable parallel to the transport direction (t) underneath the transport plane (T) for the tension-resistant bonding of the end section (3) to the starting section (4), which presses flatly overlapping against the end section (3). In particular according to the present invention, the starting section (4) is pressed flatly overlapping against the end section (3) by a vertical movement component of the pre-tensioning unit (8) in relation to the intake device (9).

Abstract: A method for joining an initial section (3) of a film tube (2) which is wound up in a band-like manner on a reel (1) with an end section (4) of a second film tube (5) extending over subsequent processing stations, especially a packaging system, in an at least partly band-like manner, with the band-like initial and end section (3, 4) each having two mutually superimposed outer lateral surfaces (10, 11, 15, 16) which each converge in their boundary regions into two interposed, inwardly folded inner lateral surfaces (17, 18, 19, 20) which thus form an inwardly situated fold axis (S, T). It is provided for in accordance with the invention that in the two outer boundary regions of the initial or end section (3, 4) a tab (7, 27) each is formed by placing a cut, which tab is joined in a tension-proof manner with the opposite section (3, 4), with the initial section (3) overlapping the end section (4).

Abstract: A method for joining an initial section (3) of a film tube (2) which is wound up in a band-like manner on a reel (1) with an end section (4) of a second film tube (5) extending over subsequent processing stations, especially a packaging system, in an at least partly band-like manner, in which it is provided that at least one upwardly pivoting tab (3a, 3b, 4a, 4b) each is formed by the placement of a cut in the initial and end sections (3, 4) of the two film tubes (2, 5) to be joined, with a tab (4a, 4b) of the end section (4) being placed on a tab (3a, 3b) of the initial section (3) and the superimposed tabs (3a, 3b, 4a, 4b) are mutually joined in a tension-proof manner. The production of a tension-proof connection of the initial and end sections (3, 4) of the film tubes (2, 5) occurs here by welding, with welding methods on the basis of ultrasonic sound being preferred.

Abstract: A method for joining an initial section (3) of a film tube (2) which is wound up in a band-like manner on a reel (1) with an end section (4) of a second film tube (5) extending over subsequent processing stations, especially a packaging system, in an at least partly band-like manner, in which it is provided that at least one upwardly pivoting tab (3a, 3b, 4a, 4b) each is formed by the placement of a cut in the initial and end sections (3, 4) of the two film tubes (2, 5) to be joined, with a tab (4a, 4b) of the end section (4) being placed on a tab (3a, 3b) of the initial section (3) and the superimposed tabs (3a, 3b, 4a, 4b) are mutually joined in a tension-proof manner. The production of a tension-proof connection of the initial and end sections (3, 4) of the film tubes (2, 5) occurs here by welding, with welding methods on the basis of ultrasonic sound being preferred.

Abstract: A method for joining an initial section (3) of a film tube (2) which is wound up in a band-like manner on a reel (1) with an end section (4) of a second film tube (5) extending over subsequent processing stations, especially a packaging system, in an at least partly band-like manner, with the band-like initial and end section (3, 4) each having two mutually superimposed outer lateral surfaces (10, 11, 15, 16) which each converge in their boundary regions into two interposed, inwardly folded inner lateral surfaces (17, 18, 19, 20) which thus form an inwardly situated fold axis (S, T). It is provided for in accordance with the invention that in the two outer boundary regions of the initial or end section (3, 4) a tab (7, 27) each is formed by placing a cut, which tab is joined in a tension-proof manner with the opposite section (3, 4), with the initial section (3) overlapping the end section (4).