A welding apparatus for use in welding first and second sheets of material together includes a seal die, a platen, a control unit, and a power source adapted to provide energy to the seal die. The seal die is made of a conductive material and is configured to impart thermal-mechanical energy to the first and second sheets of material. The seal die includes a bottom surface configured to contact the first sheet, an inner edge, a chamfer extending between the bottom surface and the inner edge, a first blend radius, and a second blend radius. The first radius extends between the chamfer and the bottom surface, while the second radius extends between the chamfer and the inner edge. The platen is configured to support the second sheet, while the control unit is programmed to cause the seal die to be directed towards the platen.

A device for welding plastic tubes includes a pair of tube holders each of which has a tube clamp which includes an upper jaw and a lower jaw. The jaws in both of the tube clamps of both tube holders have smooth tube contacting walls to permit the tubing to slip through either side when the tube holders and tubes are being moved from a loading station to a stripping station to increase the length of fluid free area in the clamped tubes. A cutting/welding station provides for cutting the tubes and welding them together.

A machine for welding saddle connectors by polywelding, during pipe laying, includes a base which extends in a first direction, a clamp which can move along the base in the first direction, a bracket mounting means for detachably coupling the machine to a pipe arranged transversely to the first direction, and a means for detachably coupling the base to the bracket mounting means.

A process for manufacturing a sheet molding compound carrier film including a first layer of material and a second layer of material sealed with each other along an edge. The seal is formed using ultrasound transmitted by a weld horn as both layers of material move along an anvil portion. The seal on the edge is suitably formed to protect the edge and build a weld to ensure moldable sheet molding compound flows to the edges of the carrier sheet, while providing a homogeneous mixture of glass and resin and also allowing air to escape.

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.

An electrical heating bonding device 1 bonds a member M1 to be bonded, which is made of a metal, and a member M2 to be bonded, which is made of a resin. The electrical heating bonding device 1 includes: an upper electrode 11 and a lower electrode 12 which sandwich the member M1 to be bonded, and are electrically conductive with the member M1 to be bonded; a pressurizing unit 20 which applies pressure to a bonding surface between the member M1 to be bonded and the member M2 to be bonded; a temperature sensor 30 which detects a temperature of the member M1 to be bonded; and a control unit 40 which controls the pressurizing unit 20 to apply the pressure to the bonding surface, after the temperature detected by the temperature sensor 30 reaches a predetermined set temperature Ts.

The invention relates to a horizontal transverse sealing station (10a-b), in particular for a horizontal tubular bag machine (12a-b), for producing transverse sealing seams (14a-b) on at least one film tube (18a-b) transported in a continuous, at least essentially horizontal transport direction (16a-b), comprising a transverse sealing station base (20a-b) fixedly connected to a packing machine (22a-b), a transverse sealing unit (24a-b), and at least one sealing jaw pair (28a-b) movably mounted on the transverse sealing unit (24a-b) and formed by two sealing jaws (26a-b), the sealing surfaces (30a-b) of which come closer to each other during a sealing process in a sealing movement (32a-b), which relative to the transverse sealing unit (24a-b) is provided with at least one movement component (34a-b) in the transport direction (16a-b), in order to seal material layers (36a-b) of the film tube (18a-b) between the sealing surfaces (30a-b) by way of heating and/or applying pressure, and to remove again at the end of the sealing process. According to the invention the transverse sealing unit (24a-b) is driveably mounted on the transverse sealing station base (20a-b) in a displacement movement (38a-b) that is at least substantially parallel to the transport direction (16a-b).

A synthetic resin-made welding joint that has a pipe end portion into which an end portion of a synthetic resin-made tube is to be fitted and inserted, and that is configured so that the pipe end portion and the tube end portion which is fitted and inserted thereinto are enabled to be welded together by heating of heating means which externally surrounds the pipe end portion, therefore, a synthetic resin-made holder which is fitted and attached onto the pipe end portion is disposed, and a flange for ensuring a radial expansion gap with respect to the heating means is integrally formed in the holder.

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.

An electrofusion saddle comprising: a thermoplastic body comprising a flange and optionally a spigot which erects from said flange; and a resistance heating coil including multiple windings, wherein said resistance heating coil is partially embedded in said flange and is partially protruding from said flange, wherein the protrusion is of at least 25% of an average external diameter of said multiple windings.