Abstract: A pair of thermoplastic coated, paramagnetic metal sheets (26 and 27) are moved from a position within a first bus loop half (28) to a position within a second loop half (29) while a pair of electrodes (31 and 32) are cyclically moved to engage and weld a line of spots along the sheets. Constant current pulses are cyclically applied to the welding electrode (32) and through the loop halves (28 and 29) to the welding electrode (31). The current divides in the loop halves in proportion to the positionment of the metal sheets in the respective loop halves so that eddy current and hysteresis losses are held to constant minimum values. Auxiliary heaters (43 and 44) act to heat the electrodes to melt and displace the thermoplastic coating along the line of engaged spots prior to the cyclic application of the weld pulses.

Abstract: A coiled section (16) of a plastic sheathed stub cable (10) is placed on a support (43) which is orbited about a longitudinal axis of a straight section (13) of the stub cable. The straight section of cable is positioned coaxially within an aperture formed in a casing part (12) which is mounted in a rotating nest (16). The juncture (70) between the apertured casing and the cable sheath is heated (81), whereafter a bead (91) of bonding material is extruded around the juncture. A molding die (106) is moved into the extruded bead to force portions of the bead into the juncture to form a homogeneous weld with the cable sheath and casing parts while uniformly shaping the remaining portions.

Abstract: A coiled section (16) of a plastic sheathed stub cable (10) is placed on a support (43) which is orbited about a longitudinal axis of a straight section (13) of the stub cable. The straight section of cable is positioned coaxially within an aperture formed in a casing part (12) which is mounted in a rotating nest (16). The juncture (70) between the apertured casing and the cable sheath is heated (81), whereafter a bead (91) of bonding material is extruded around the juncture. A molding die (106) is moved onto the extruded bead to force portions of the bead into the juncture to form a homogeneous weld with the cable sheath and casing parts while uniformly shaping the remaining portions.