With the traction means tensioner, a traction means having at least two ends is tensionable. The traction means tensioner comprises a first fastening means, a second fastening means and a coupling means. The first fastening means has a first fastening portion at which the first end of the traction means as fastenable. The second fastening means has a second fastening portion at which the second end of the traction means is fastenable. The coupling means couples the first and the second fastening means to each other so that the first and the second fastening means are movable with respect to each other and their movability is at least restricted on one side. Further, the first and the second fastening means are pre-tensionable with respect to each other via at least one spring element.

An automatic welding machine for lap welding the edges of plastic webs, comprising a movable supporting frame, a heating device for partially melting the plastic webs, at least two opposing, counter-rotating pressing rollers and/or advancing rollers, at least one of which being driven, and at least one driving device comprising a drive motor and at least one gearbox for driving the pressing and/or advancing rollers, wherein the pressing rollers and/or advancing rollers are driven by the driving device by way of at least one flexible shaft. Furthermore, the gearbox can be implemented as a worm gear mechanism comprising a worm that is seated directly on a motor shaft of the drive motor and two counter-rotating worm gears driven by the worm.

A welding unit (1) for the thermal welding of film tubes, in particular for a waterless toilet, is proposed, at least two welding means (2, 2a) which can be moved relative to one another being comprised for the thermal welding of a film tube, each welding means (2, 2a) being configured to be movable by means of at least one joint arrangement (3, 3a), the at least one joint arrangement (3, 3a) comprising at least one articulated lever (4, 4a-4e).

An apparatus for filling and sealing bags intended for containing banknotes includes a generally parallelepiped-shaped container, with side walls, a bottom and an upper lid provided with an opening for allowing entry into the container of a bag, made up of flexible plastic film, and of banknotes intended to be introduced into the same bag. The apparatus includes a pair of sealing bars arranged at the upper end of the container and a system for controlling and moving the bars between their respective opening and closing positions. The control and movement system of the sealing bars has a motor for driving a shaft adapted to rotate at least one driving pulley arranged below in correspondence with a vertical edge of the container, a kinematic connection for closing the bars comprised of a combination of cables and tension springs connecting the driving pulley to the sealing bars and a kinematic connection for opening the bars comprised of a combination of cables and tension springs connecting the sealing bars to a respective fixed anchor point of the container.

A drive system for driving an automatic welding machine for joining the edges of sealing sheets, comprising pressing/advancing rollers located vertically opposite one another and driven by a shared drive motor, downstream of which a transmission gear mechanism is connected, and an upper pressing/advancing roller is disposed rotatably about a roller rotational axis on a tensioning arm of the automatic welding machine, which is pivotable about a tensioning arm axis, and a lower pressing/advancing roller is disposed rotatably about a roller rotational axis on a frame of the automatic welding machine, which is supported by at least two drive rollers, wherein the drive motor and the transmission gear mechanism are rigidly attached to the frame, and the drive motor comprises a motor armature including a protruding rotational shaft, and the transmission gear mechanism comprises a rotatable protruding input shaft and output shaft.

Disclosed herein is a head fixture for adhesively bonding a part of a golf club head to a body of the golf club head. The head fixture includes a bottom portion, including a body retainer, and a top portion, selectively attachable to the bottom portion and including pressure applicators spaced apart about the top portion. Each one of the pressure applicators comprises a ratcheting mechanism and a ribbed shaft engaged with the ratcheting mechanism such that, when the top portion is selectively attached to the bottom portion, the ribbed shaft is movable away from the body retainer into a position, associated with a pressure applied to the part of the golf club head by the ribbed shaft, and the ribbed shaft is non-movably fixable, relative to the body retainer, in the position.

With the traction mechanism tensioner, a traction mechanism having at least two ends is tensionable. The traction mechanism tensioner comprises a first fastener, a second fastener and a coupler. The first fastener has a first fastening portion at which the first end of the traction mechanism as fastenable. The second fastener has a second fastening portion at which the second end of the traction mechanism is fastenable. The coupling means couples the first and the second fasteners to each other so that the first and the second fasteners are movable with respect to each other and their movability is at least restricted on one side. Further, the first and the second fasteners are pre-tensionable with respect to each other via at least one spring element.

A drive system for driving an automatic welding machine for joining the edges of sealing sheets, comprising pressing/advancing rollers located vertically opposite one another and driven by a shared drive motor, downstream of which a transmission gear mechanism is connected, and an upper pressing/advancing roller is disposed rotatably about a roller rotational axis on a tensioning arm of the automatic welding machine, which is pivotable about a tensioning arm axis, and a lower pressing/advancing roller is disposed rotatably about a roller rotational axis on a frame of the automatic welding machine, which is supported by at least two drive rollers, wherein the drive motor and the transmission gear mechanism are rigidly attached to the frame, and the drive motor comprises a motor armature including a protruding rotational shaft, and the transmission gear mechanism comprises a rotatable protruding input shaft and output shaft.

An automatic welding machine for lap welding the edges of plastic webs, comprising a movable supporting frame, a heating device for partially melting the plastic webs, at least two opposing, counter-rotating pressing rollers and/or advancing rollers, at least one of which being driven, and at least one driving device comprising a drive motor and at least one gearbox for driving the pressing and/or advancing rollers, wherein the pressing rollers and/or advancing rollers are driven by the driving device by way of at least one flexible shaft. Furthermore, the gearbox can be implemented as a worm gear mechanism comprising a worm that is seated directly on a motor shaft of the drive motor and two counter-rotating worm gears driven by the worm.

An ultrasonic welding system includes a movable ultrasonic welding stack for applying vibrational energy to a workpiece. A motion control system controls the motion of the ultrasonic welding stack and one or more sensors sense a control variable and output a corresponding control signal. A controller provides control inputs, based on the control signal, to the motion control system and causes, following initiation of a welding operation, an automatic change of speed of motion of the ultrasonic welding stack. The automatic change of the speed is a function of at least one control variable until the control variable reaches a predetermined value.