Abstract: The present disclosure relates to a metal seal ring suitably used at pipe connection portions in exhaust pipe systems of automobile engines for example and a method of producing the same. The metal seal ring comprises a metal ring having a pipe-shaped cross section, and a heat-resistant composite gasket material ring filling the metal ring, wherein the composite gasket material ring is formed such that a sheet of the composite gasket material, such as a mixture of heat-resistant fiber and elastomer, a having reinforcing core material, such as a wire net and a perforated steel plate, therein, is slit to obtain a rectangular strip, that both longitudinal ends of the strip are joined to each other to form a ring, and that both fringes of the strip are butt-joined to each other to form a ring having a pipe-shaped cross section.

Abstract: Disclosed is a grinding machine for use with a rolling mill capable of carrying out the continuous grinding operation of the cylindrical or rolling surface of a work roll without removing the work roll from the rolling mill while the continuous rolling operation is being carried out, whereby labor saving can be attained and the downtime of the rolling mill can be remarkably reduced.