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 fitting for repairing a leaking polymer pipe is provided. The fitting includes a first housing and a second housing that are sized to fit about the pipe. The first housing includes a first coil configured to increase in temperature in response to the application of an electrical current to fuse the first housing to the second housing and the pipe. The second housing includes a second coil on a first end and a third coil on an opposing end. The second and third coils configured to increase in temperature in response to the application of electrical current to fuse the second housing to the pipe. The fitting further includes a first seal coupled to the first housing and a second seal coupled to the second housing. The first and second seal forming a seal that prevents gas pressure from the pipe from interrupting the fusion process.

A film fin sealing device is disclosed herein which may have a groove defining a base. The base of the groove of the fin sealing device may be oriented at a skewed angle with respect to a longitudinal direction of the conveyor of a heat sealing machine. Edges of a thermoplastic sheet or two stacked layers of thermoplastic sheets are introduced into the groove of the film fin sealing device and placed in contact therewith to both heat and fuse the distal edge portions of the thermoplastic sheet(s) to join the edge portions thereof to form a fin seal.

One fusion machine can butt or socket fuse polyolefin pipes and fittings in straight alignment or at inwardly or outwardly mitered universal angles from 0? to 45? for butt fusion and from 0? to 10? for socket fusion. The machine is manually driven, hydraulically monitored and operated in all configurations from one side of the machine.

The technology relates to a heat sealing system (400). For instance, the heat sealing system may include a sealer assembly (800) including a pair of heat sealing bars (830, 840) configured to generate heat seals. The heat sealing system may also include a positioning (900) assembly including a platform (910) and a motor (952). The sealer assembly may be mounted to the positioning assembly, and the motor may be configured to move the sealer assembly towards and away from an edge of a table (1600).

A welding apparatus includes: a first heating stack, wherein a first heating layer is electrically connected to a first electronic control circuit and is located between a first cover layer and a first electric insulator which is mounted on a first ledge; a second heating stack, wherein a second heating layer is electrically connected to a second electronic control circuit and is located between a second cover layer and a second electric insulator which is mounted on a second ledge, wherein the first heating stack and the second heating stack are coupled to a drive to provide a linear relative movement between the first heating stack and the second heating stack, and wherein the first electronic control circuit is adapted to provide electric energy to the first heating layer and wherein the second electronic control circuit is adapted to detect an electric resistance and/or an electric impedance of the second heating layer.

Methods and apparatuses for bonding polymeric parts are disclosed. Specifically, in one embodiment, the polymeric parts are bonded by plastically deforming them against each other while they are below the glass transition temperatures. A method includes: placing a first polymeric part in contact with a second polymeric part; and plastically deforming the first polymeric part and the second polymeric part against each other to bond the first polymeric part to the second polymeric part. Additionally, during the plastic deformation, a temperature of the first polymeric part is less than a glass transition temperature of the first polymeric part and a temperature of the second polymeric part is less than a glass transition temperature of the second polymeric part.

An underwater pipe and connector assembly includes an underwater pipe having a pipe body and an annular connecting end section, a connector fixed in the connecting end section, and at least one reinforcing layer having a first fixed cover section fused to and fixedly covering the connecting end section, and a second fixed cover section fused to and fixedly covering an outer circumferential surface of the pipe body immediately adjacent the connecting end section. An outer coil is embedded between the first fixed cover section and the connecting end section and between the second fixed cover section and the outer circumferential surface of the pipe body immediately adjacent the connecting end section.

A socket fusion jig includes a pipe saddle and coupling saddle spaced apart. Rotation of a handle causes the pipe saddle and coupling saddle to move laterally relative to one another so that the pipe held in the pipe saddle may be fused to the coupling held in the coupling saddle.

An exchangeable ultrasonic welding module contains an ultrasonic transducer assembly (4) with a horn (5) and an anvil (7). The module contains a member (1) provided with a guideway (8) in a mating guideway (18) on the frame (10) of a filling tube (14). A locking element (11) secures the member (1) and the frame (10) in a fixed position relative to each other.

The member (1) is provided with an element (2) for linear motion of a sliding carriage (3) and an adjustable stop (6) for restricting the carriage movement (3). The ultrasonic transducer assembly (4) is firmly affixed to the carriage (3), whereas the anvil (7) is affixed to the member (1). The frame (10) may contain an adjustable stop (9) for locking the member (1) in a defined position as the member is inserted into the mating guideway (18).