Abstract: A tensioning and sealing apparatus for strapping an object with a band exhibits a tensioning unit (3) for retaining and tensioning two ends of the band which are to be sealed as well as a sealing unit for connecting the two mutually overlapping ends. The tensioning unit (3) has a motor drive (12) and comprises a tensioning shoe (5) and a drivable tensioning wheel (8) which is fastened on a pivotable rocker (6) and is intended for pressing the band against the tensioning shoe (5) and for gripping the same upon rotation. In order to achieve a high overall efficiency of the tensioning drive, the drive motor (12) of the tensioning wheel (8) is arranged coaxially with the tensioning wheel (8) and is connected to the tensioning wheel (8) via a gear mechanism arranged coaxially with the tensioning wheel (8).

Abstract: A tensioning and sealing apparatus for strapping an object (2) with a plastic band (1) includes a housing (3) having a tensioning unit (4) for retaining two ends (6, 7) of the plastic band (1) which are to be sealed and for tensioning the same and having a sealing unit (5) for connecting the two mutually overlapping ends (6, 7). The tensioning unit (4) has a tensioning shoe (10) and a toothed tensioning wheel (13) which is mounted on a pivotable rocker (11), which can be driven via a tensioning shaft (12), and which is intended for pressing the plastic band (1) against the tensioning shoe (10) and for gripping the same upon rotation. The bearing (15) of the pivotable rocker (11) is arranged on the side of the tensioning shoe (10) and behind the latter in the tensioning direction (14), the rocker axis being located between a bearing surface (16) of the tensioning shoe (10) and a base plate (8).

Abstract: The apparatus (4) manually operable with a tightening lever (16) has a cutting station (8), a tightening station (10) and a clamping station (12). The latter has a clamping arm (18) mounted on an eccentric shaft (20) and having a clamping shoe (40) through which the strip end (3) inserted in the strip channel (5) is clamped. The clamping shoe (40) is laterallly displaced with respect to the axis of the eccentric shaft (20) in the direction of the strip end (3) in the vicinity of a clamping nose (35) supported on the supporting face (36) of the apparatus casing (15). On lowering the clamping shoe (18) into the clamping positioning an additional clamping force on the clamping shoe (40) is exerted by the clamping nose (35) guided on the supporting surface (36).

Abstract: The band movement drive of a machine for the automatic hooping of a package with a hooping band has a main band drive and a secondary band drive. During band advance, the hooping band is guided by the main band drive at a first, higher speed in a band channel for enveloping the package up to its entry in a joining station, followed by a switching over to band retraction, which takes place at the same higher speed. The secondary band drive is driven at a higher speed than the main band drive, so that a band reserve is formed beween the two band drives. When the hooping band is loosely applied to the package, switching over takes place to a second, lower speed, at which the band reserve is retracted. The hooping band is then tensioned with the tension set on the main band drive and then in the joining station the band and band end are joined together and the band is separated from the band supply.