Abstract: A fuel injection valve damping insulator damps vibration produced in a fuel injection valve (11). A damping insulator (30) is interposed between a shoulder portion (18) of a cylinder head and a tapered surface (24) of the fuel injection valve (11) that faces the shoulder portion. The damping insulator (30) includes an annular tolerance ring (33) that abuts against the tapered surface (24), and an elastic member (36) that is arranged between the tolerance ring (33) and the shoulder portion (18). An annular coil spring (34) and a sleeve (35) are each embedded juxtaposed in the elastic member (36). A height (H2) of the sleeve (35) is formed lower than an outer diameter (H1) of individual small ring portions that form a helix of the coil spring (34), and at least one of a tolerance ring (33) side and a shoulder portion (18) side of the sleeve (35) is buried in the elastic member (36).

Abstract: A method of manufacturing a magnetic recording film of a thin metallic film type comprises a step of forming a magnetic layer in the form of a thin metallic film on a base film, while providing a predetermined level of tension in the base film; a thermal treatment step of heating the film with the magnetic layer to a first temperature level, at which thermal shrinkage of the base film is caused, while providing the predetermined tension in the film; and, then, cooling the film, thereby removing any curls and wrinkles found therein; and an additional thermal treatment step of heating the thermally treated film to a second temperature level, which is lower than the first temperature level, and cooling the film, thereby removing thermal stress in the magnetic layer.