Abstract: The packing machine is provided for laying band (11) around goods (10) to be packed, with the band being advanced by a drive roller (42). After a complete loop has been generated by the band (11), the band is reversed by a drive roller (43) in a reverse movement to be performed first at high speed. Then, the band (11) is tensioned by further reverse movement at a low speed. For the fast movement, there is provided a first drive branch (70) which alwys drives both drive rollers (42,43) in common. A second drive branch (71), including a gearing (80), is provided for tensioning the band (11). A gearing member (81) of the gearing (80) is held fast by a stationary holding coupling (86). If the tension exceeds the braking moment provided by the holding coupling (86), the previously retained gearing member (81) is rotated. This rotation is detected by a sensor (88) which then initiates termination of the tensioning.

Abstract: For connecting two band portions (11a, 11b) by friction welding, one band portion (11a) is pressed against an abutment (20) by a clamping jaw (24), and the other band portion (11b) is pressed against the abutment (20) by another clamping jaw (25). An oscillating jaw (26) is arranged between the clamping jaws for performing reciprocating movements transversely to the band (11) and thus welding the overlapping band portions (11a, 11b) to each other by friction welding. For preventing shear stresses between the oscillating jaw (26) and that clamping jaw (25) which holds the band portion (11b) entrained by the oscillating jaw, this clamping jaw (25) is driven in synchronism with the oscillating jaw (26) and with the same amplitude as the oscillating jaw (26). Facing the clamping jaw (25), there is arranged a smooth support face (23) for allowing sliding movement of the band (11) thereon.