The welding points of the antenna are embedded in the card base (100) by conductive welding materials (140).

Subsequently a circular weld is formed along each weld line, thereby consuming the plurality of tack welds and forming each part of the plurality of parts.

An outer surface of the anvil roll preferably carries a bonding pattern defining the locations where bonding of the webs occurs.

The invention concerns a method and a device for electric spot welding, improving the capacity of dissipation of the vibratory energy of assembled structures (51, 52) with welding spots.

The laser capping weld comprises numerous overlapping weld spots that together form an annular weld bead located at or just below the discharge surface of the pad.

Weld points (14) are previously formed in this zone.

Welded seams (8) are situated around the perimeter of each compartment.

The invention relates to corrosion protection for the weld points on plastic-coated steel pipes without any coating at the weld points.

The heating unit decreases the spotwelding points, saves material and avoids leak.

Adjacent weld points (51, 52) have mutually overlapping welds.

A thermofuse has a spring clip (1) with soldering joints (5, 6) at both ends and a bending section (4) in the area between the soldering joints.

External connections are provided by a small number of bonding pads on each wafer.

It is also possible to prevent cracks from being formed in the individual welding spots.

According to the invention, the soldering points (5) are made by induction soldering.

In a preferred embodiment, a pre-heating current is also used during the time (t3) prior to a welding phase, thereby improving the quality of welding spots and the service life of the electrodes.