Abstract: Provided is a pipe welding apparatus, including: a support fixed to the ground; a torch which is supported by the support and is formed to correspond to a welding portion of a pipe; and a first rotation part for rotating the torch in a circumferential direction of the pipe up to a predetermined angle.

Abstract: A concave curved surface 28 having an arc configuration with the radius R as seen in a vertical cross sectional view is formed over an entire side surface of each of squeeze rolls 8. Below the concave curved surface 28 is provided a lower side flange portion 29; while above the concave curved surface 28 is provided an upper side flange portion 30. A virtual line that includes the center point of the radius R is provided parallel to a rotation shaft 22 of the squeeze roll 8 and facing the concave curved surface 28. With the distance from the virtual line to the lower side flange portion 29 taken as “a” and the distance to the upper side flange portion taken as “b”, the relationship a<b is established.

Abstract: A tool (40) for imprinting a pattern in a has a handle (42). A stamp (44), connected to the handle (42), has a pattern (54) formed on a face (52) of the stamp (44). The face (52) of the stamp (44) forms a concave surface.

Abstract: An apparatus for the in-line annealing of amorphous strip includes feed rolls for substantially continuously feeding the strip during annealing. The strip is first fed into a nip of cooperating heated pressure rolls. The heated pressure rolls rapidly heat the strip to an annealing temperature at a rate of substantially 10.sup.2 -10.sup.4 .degree.C./second while also subjecting the strip to localized plastic deformation. Where multiple ribbons are being fed simultaneously through the heating pressure rolls, bonding occurs to produce a composite strip. The strip is fed from the pressure rolls through an in-line annealer immediately downstream from the pressure rolls. During annealing, the strip is continuously fed and maintained under tension by operation of a winding roll. The strip is annealed at a temperature of between 420.degree.-510.degree. C. for 0.01-10.0 minutes.