Abstract: Fastener for fastening together the ends of a length of steel strap wrapped around a package in a package strapper. It has a top and bottom. The top is above the section of a track where the fastening is established. The bottom is below the same section. The top is accommodated in a housing that pivots on the bottom on a hinge paralleling the track. The top comprises strap-shaping punches, a strap clamp, and a strap cutter. The bottom comprises a strap-shaping die mounted on a base and facing the punches. The pivot simultaneously constitutes a rotating shaft that drives all the fastener's moving parts by way of cams, eccentrics, or levers and rods.

Abstract: A package strapper with three motor-driven mechanisms, specifically a strap feed, a strap stretcher, and a strap-end fastener. The mechanisms are mounted on a strap track that loops around the package. The strap feed includes at least two wheels, each forced against one side of the strap by a spring. The motor that drives the strap feed can be reversed. The strap-stretcher wheel is between the feed and the track and is partly loosely surrounded by a strap guide. One end of the guide opens into the track. The strap-feed motor and the strap-stretcher motor are asynchronous three-phase motors. They are connected to a frequency converter that supplies them with electricity of varying frequency and potential and controlled by controls or by a processor integrated into the frequency converter. A manually adjustable terminal strap-tension selector is connected to the controls or to the processor.

Abstract: A device for tensioning a strapping band obtained from a supply reel and positioned around a package, and for fastening the overlapping ends of the band together with a sleeveless connection, as well as for cutting off the length of strap not untilized in wrapping the package and leading from the supply reel. A motorized drive mechanism for the upper half of a band-fastening tool and that for the tensioning wheel consists of a single motor that first, while it rotates in one sense, powers a tensioning wheel which tensions the strapping band, and then, subsequent to a shift in gear that depends on the tension in the band, reverses its rotation and powers the shaft of the upper half of the band-fastening tool. The gearshift consists of a pivoting lever that can be shifted against the force of a spring out of its initial position. The pivoting lever engages a spring-loaded gearshift lever through a set screw. The pivot lever is activated by the reaction force of the drive mechanism.