Abstract: When spot-welding a workpiece including a thin plate, a first thick plate, and a second thick plate, the workpiece is clamped by a fixed electrode in contact with the second thick plate, a movable electrode in contact with the thin plate, and control-pressure applying unit set adjacent to the movable electrode and in contact with the thin plate. Pressure is applied to the second thick plate by the fixed electrode, and pressure and control pressure are respectively applied by the movable electrode and the control-pressure applying unit to the thin plate. The pressure from the fixed electrode is controlled to be smaller than the pressure from the movable electrode. The current density between the thin plate and the first thick plate increases.

Abstract: In an earth electrode apparatus, a cradle having first, second, and third shanks to which first, second, and third earth electrodes can be attached respectively is coupled to a shaft supported by a base. The cradle is coupled thereto in a tiltable manner. If the surface of a workpiece is irregular or inclined, the cradle tilts for balancing with the workpiece to ensure equal contact pressure for the contact of the first, second, and third earth electrodes with the workpiece, thereby offering stable contact irrespective of surface irregularity or inclination. Since a welding current is split to flow into the first, second, and third earth electrodes through respective points of contact thereof with the workpiece, it is possible to reduce current density at each of the points of contact and to avoid heat generation ascribable to conductive resistance at each of the points of contact.

Abstract: This invention relates to an instrument for regenerating a living organism tissue or organ, characterized in that a support (A) formed from a biodegradable material or a bioabsorbable material includes a sponge-like fine matrix (B) formed from a biodegradable material or a bioabsorbable material and a linear guide channel (C) for a living organism tissue or organ.

Abstract: In the electrode tip dressing apparatus, the upper surface and the lower surface of a dressing body is covered with an upper chip capturing case and a lower chip capturing case so that the chips generated when electrode tips are dressed by polishing or grinding are prevented from scattering to the outside, whereby a chip collection efficiency can be increased.

Abstract: A chip collecting apparatus for a tip dresser of the present invention has a sideways-mounted dresser main body and a chip pickup case mounted at the end of the dresser main body. Chips generated during dressing electrode tips are picked up in the case and discharged from the chip discharge port opened under the case into a chip collection vessel. A pair of opposite electrode tips held at the ends of a welding gun advances horizontally from the front. Since chip inserting surfaces of the chip pickup case, in which chip insertion ports for receiving the electrode tips are opened, are formed in a wedge shape extending from the front end to the rear end with respect to the advancing direction of the welding gun, the electrode tips can be smoothly guided to the chip insertion ports without unnecessarily increasing the space between the electrode tips.

Abstract: This invention relates to an instrument for regenerating a living organism tissue or organ, characterized in that a support (A) formed from a biodegradable material or a bioabsorbable material includes a sponge-like fine matrix (B) formed from a biodegradable material or a bioabsorbable material and a linear guide channel (C) for a living organism tissue or organ.

Abstract: In the electrode tip dressing apparatus, the upper surface and the lower surface of a dressing body is covered with an upper chip capturing case and a lower chip capturing case so that the chips generated when electrode tips are dressed by polishing or grinding are prevented from scattering to the outside, whereby a chip collection efficiency can be increased.