Disclosed is a tubular core on which sheets of metal or other material can be wound and supported, for shipment, handling and dispersal, and a method for forming the core. The core comprises a metal sheet or strip which has a rectangular-ribbed cross-sectional profile of flattened ribs, and which is wound spirally into a tubular configuration. The core is formed by passing the strip through a plurality of roll-forming stands, to initiate forming and progressively form an arcuate ribbed sinusoidal profile, then a final roll-forming pass is used (or several such passes are used) to flatten the ribs of the profile so that the rectangular flattened ribs collectively form a support surface for the sheets which are wound and supported on the core.

Disclosed is a tubular core on which sheets of metal or other material can be wound and supported, for shipment, handling and dispersal, and a method for forming the core. The core comprises a metal sheet or strip which has a rectangular-ribbed cross-sectional profile of flattened ribs, and which is wound spirally into a tubular configuration. The core is formed by passing the strip through a plurality of roll-forming stands, to initiate forming and progressively form an arcuate ribbed sinusoidal profile, then a final roll-forming pass is used (or several such passes are used) to flatten the ribs of the profile so that the rectangular flattened ribs collectively form a support surface for the sheets which are wound and supported on the core.

There is provided a method of manufacturing a tooth-shaped component including drawing process of draw-forming a workpiece so as to obtain a cylindrical container which has a bottom surface portion and a side surface portion; diameter-reducing process of reducing a diameter of a particular part in which a tooth tip portion is to be formed in the side surface portion of the cylindrical container, so as to increase a thickness of a corner portion such that an external shape of the corner portion between the bottom surface portion and the side surface portion satisfies the following conditional expression (1); and tooth shape-forming process of forming the tooth tip portion in the particular part of the cylindrical container reduced in diameter in the diameter-reducing process, so as to obtain a tooth-shaped component which has the bottom surface portion, the side surface portion, and the tooth tip portion.

(R+H)2t(1)

A driveshaft assembly includes an inner tube. The inner tube has splines formed from a plurality of teeth alternating with a plurality of recesses formed on the inner tube. An outer tube has splines formed from a plurality of teeth alternating with a plurality of recesses formed thereon. The outer tube coaxially receiving the inner tube. The splines of the inner tube engaging the splines of the outer tube. A plurality of protrusions is formed on one of an inner surface of the splines of the outer tube and an outer surface of fewer than an entirety of the plurality of recesses of the splines of the inner tube.

A driveshaft assembly includes an inner tube. The inner tube has splines formed from a plurality of teeth alternating with a plurality of recesses formed on the inner tube. An outer tube has splines formed from a plurality of teeth alternating with a plurality of recesses formed thereon. The outer tube coaxially receiving the inner tube. The splines of the inner tube engaging the splines of the outer tube. A plurality of protrusions is formed on one of an inner surface of the splines of the outer tube and an outer surface of fewer than an entirety of the plurality of recesses of the splines of the inner tube.

The present disclosure relates to a mesh container and a method of making a mesh container that has a first and a second set of opposing side panels, a bottom panel, and a rim directed outwards from the upper edges of the side panels. At least two adjacent sides panels of the container and portion of the rim directed outwardly from the upper edge of the side panels are made from a sheet metal precursor with least one perforated and a stretched portion and unstretched metal portion. The precursor is folded so that the unstretched metal portion joins the two side panels and is bent to form the rim. A notch is cut from the edge of the unstretched metal portion where it is bent at the corner formed by the two side panels.