Abstract: In a suspension provided with a load beam and a flexure, a circular first reference hole is formed in a portion of the flexure nearer to one end thereof than the center, while an oval second reference hole is formed in a portion of the flexure nearer to the other end. The load beam is provided with first and second burred holes corresponding to the first and second reference holes, respectively, in position. Each burred hole has a flange portion on its inner peripheral portion, projecting above the surface of the load beam. The flange portion of the first burred hole is fitted into the first reference hole with the flexure put on top of the load beam in the thickness direction. The flange portion of the second burred hole is fitted into the second reference hole. By doing this, the relative positions of the load beam and the flexure are restricted.

Abstract: A process for manufacturing seamless flux-cored welding wires 0.8 to 4 mm in diameter with excellent cracking resistance and primer proof quality and containing very little diffusible hydrogen suited for the welding of high-tensile steels and steel structures subjected to large restraining forces by dehydrogenating by high-temperature heating comprises the steps of heating a straight wire 8 to 15 mm in diameter by direct electric heating through a first and a second pair of roll electrodes spaced 2 to 5 m apart and a ring transformer disposed therebetween to a temperature between 620.degree. and 1100.degree. C., cooling the heated wire to a temperature not higher than 500.degree. C. with a coefficient of heat transfer not higher than 250 kcal/m.sup.2 h.degree.C., and drawing to the desired diameter. The welding wire thus obtained a weld containing not more than 5 ml of diffusible hydrogen per 100 g deposited metal.

Abstract: A method for manufacturing tubes filled with powdery and/or granular substances comprising the steps of forming a metal strip into a tube, feeding powdery and/or granular substances into the tube being formed as a core, joining together the edges of the tube filled with the core of the powdery and/or granular substances by high-frequency welding, and reducing the diameter of the welded tube filled with the core of the powdery and/or granular substances. At least the top layer of the core in the tube is composed of powdery and/or granular substances having low enough magnetic susceptibility to remain unattracted to the magnetized tube edges that is determined based on the welding heat input.

Abstract: A coil of a tube is formed. The coil is vibrated while a threadlike piece is passed in through the inlet end of the tube so that a given point of the tube reciprocates along a helical path. Provision is made to ensure that inlet end of the tube does not cause a portion of the threadlike piece upstream of and close to that inlet end to move diametrically while being fed into the tube. Provision is also made to form a coil of the threadlike piece, from which the threadlike piece is pull out along the axis of the coil and fed to the inlet end of the tube by a conveying force resulting from the vibration of the coil of the tube. A feeder to supply the threadlike piece into the tube may be provided between the inlet end of the tube and a coil feeding device.

Abstract: A method of manufacturing tubes filled with powdery and/or granular substances, such as flux-cored welding wires. A tube filled with a powdery and/or granular substance is continuously manufactured by forming a metal strip being fed in its longitudinal direction into an unwelded tube (1a) using forming rolls (2), feeding a powdery and/or granular substance (F) into the unwelded tube (1a) being formed through its opening, butt-welding together fringing edges of the opening, and reducing the diameter of the welded tube (1b). An allowable minimum heat input below which cold cracking occurs and a maximum allowable heat input above which spatters whose diameter is not smaller than 0.83 times the inside diameter of the finished tube are generated are determined in advance, and the butt welding is performed with a heat input larger than the allowable minimum heat input and smaller than the allowable maximum heat input.

Abstract: A coil of a tube is formed. The coil is vibrated while a threadlike piece is passed in through the inlet end of the tube so that a given point of the tube reciprocates along a helical path. Provision is made to ensure that inlet end of the tube does not cause a portion of the threadlike piece upstream of and close to that inlet end to move diametrically while being fed into the tube. Provision is also made to form a coil of the treadlike piece, from which the threadlike piece is pulled out along the axis of the coil and fed to the inlet end of the tube by a conveying force resulting from the vibration of the coil of the tube. A feeder to supply the threadlike piece into the tube may be provided between the inlet end of the tube and a coil feeding device.

Abstract: The stream of the gas carries a thread held in the sealed container forward into and through the tube. The pressure of the gas in the sealed container is kept high enough to maintain the mean flow rate of the gas at any given point of the tube above the travel speed of the thread. A positive longitudinal surging motion is given to the thread advancing through the tube. A frictional force between the flowing gas and the peripheral surface of the thread, a static pressure working on an area corresponding to the cross-sectional area of the thread, and a difference between the static pressures on both sides of the surging portion of the thread work together to carry the thread forward.

Abstract: A method of inserting a thread through a tube, the stream of the gas carries a thread held in a sealed container forward into and through the tube. The pressure of the gas in the sealed container is kept high enough to maintain the mean flow rate of the gas at any given point of the tube above the travel speed of the thread. A positive longitudinal surging motion is given to the thread advancing through the tube. A frictional force between the flowing gas and the peripheral surfade of the thread, a static pressure working on an area corresponding to the cross-sectional area of the thread, and a difference between the static pressures on both sides of the surging portion of the thread work together to carry the thread forward.