Matsushita Electric Industrial Co., Ltd.

Toyo Boseki Kabushiki Kaisha

Japanese National Railways

Hidenori Suzaki

Yoshihiro Murata

Haruhisa Furuishi

Hiroshi Yoshida

Hiroshi Imanaka

Misao Sumoto

Masanori Maeda

Keiji Shimizu

Kinji Terawaki

Hiroshi Izumi

Koji Inaoka

Tetsuro Miura

Kuninori Azuma

A method and apparatus for demounting a metal plate spot welded to a metal member. In accordance with the method, a hollow electrode rod is placed in opposition to the periphery of a spot weld between the metal plate and the metal member, an electric arc is formed between the electrode rod and the metal plate, the periphery of the spot weld is melted with arc heat, and the resultant molten metal is drawn up through the hollow portion of the electrode rod. The method may be performed with an apparatus having a hollow internal rod which includes an electrode rod retaining portion at a forward tip end thereof. A rod retaining mechanism retains the internal rod for free longitudinal movement in opposite forward and rearward directions, elastically urged in the forward direction. A sliding block is movable in the forward and rearward directions, urged forward by an elastic member. Structure is provided to prevent movement of the sliding block forward of a predetermined forward position. A device is provided for engaging the sliding block with the internal rod and moving the sliding block and internal rod in a rearward direction to a predetermined rearward position. Also provided is a device for releasing engagement between the sliding block and the internal rod, a guide piece mounted on the retaining mechanism for establishing a reference position from which the free end of the electrode rod is movable a predetermined distance rearward of a metal member to be treated, and structure for drawing melted metal rearward through the hollow electrode rod and internal rod.

Method and apparatus for demounting a spot welded metal plate

A pad comprising at least one sheet of material having a thermoplastic resinous composition and a heater actuable to heat and soften the sheet, the pad being for use in alignment of machine equipment, rails, beams, girders, or other constructional elements relative to a horizontal base, vertical or inclined line, or to other constructional elements. In use the pad is placed between the equipment, rail or the like and a support or abutment therefor, and the heater is actuated so as to soften the pad just sufficiently that the weight of object or a force thereon reduces the thickness of the pad an amount equal to the desired movement of the object necessary to achieve the desired alignment.

Electrically heated alignment pad

An electrothermally deformable levelling pad utilizable in padding, levelling or aligning girders, rails or any other constructional or structural elements. The levelling pad comprises at least one thermoplastic plate member and an electric heater for heating the thermoplastic plate member to soften or melt to cause the overall thickness of the pad to reduce to a value sufficient to bring an article or machine to a predetermined level. The plate member is made of a thermoplastic random-copolymerized polyester which comprises an acid component and a glycol component.

Electrothermally deformable levelling pad

Growing community of inventors

Hirakata, Japan

Hidenori Suzaki