Abstract: A reinforcing member includes a reinforcing resin layer which is elastic in its semi-hardened or unhardened state before the reinforcing member is applied to an object to be reinforced and which is rigid in its hardened state; an expandable member centered along the reinforcing resin layer; the expandable member being narrower than the reinforcing resin layer; the expandable member being elastic at least before the reinforcing member is applied to the object; the expandable member being expandable to form a bead-like projection before the reinforcing resin layer hardens; the reinforcing resin layer having its edge portions extending beyond the expandable member, the underside of the edge portions thereof being adapted to adhere to the object.

Abstract: A material for reinforcing a panel comprises a strip of expandable material which has not yet expanded, and a sheet of resin material which has not yet hardened. The expandable material is centered onto a central portion of the resin material so that the edges of the resin material are exposed and can be bonded to the panel. One surface of the expandable material is exposed to contact the panel. The exposed surface of the expandable material is flush with the surface of the edges of the resin material.

Abstract: A material for reinforcing a panel includes a resin material and a expandable material. The expandable material is centered onto the resin material in such a manner that the edges of the resin material are exposed and can adhere to the panel. The expandable material includes an easy-bending portion in a position corresponding to a bent portion of the panel. The easy-bending portion is formed by a groove or by perforations in the expandable material.

Abstract: A material for reinforcing a panel or plate includes a first resin layer having a high tensile modulus of elasticity after hardening; a second resin layer having a low tensile modulus of elasticity after hardening; an expandable member disposed between the second resin layer side and the panel to be reinforced. The expandable member is narrower than the reinforcing resin sheet. The first and second resin layers are combined in an unhardened or semi-hardened state to form a reinforcing resin sheet. The expandable member expands into a bead-like projection when heated and then hardens. The edges of the reinforcing resin sheet extend beyond the edges of the bead-forming member or expandable member is such a manner that the second resin layer of the reinforcing resin sheet can be attached to the panel or plate.

Abstract: A reinforcing material, comprises a reinforcing resin sheet which is unhardened or semi-hardened to be flexible prior to its use; a high tensile-strength fiber for reinforcing the resin sheet in its longitudinal direction; a low tensile-strength fiber for reinforcing the resin sheet in its transverse direction; and an expandable material narrower than the resin sheet. The expandable material is flexible, at least before the reinforcing material is used. The expandable material is made of a material which can expand to form a bead-like projection before the resin sheet is hardened. The expandable material is fixed to the resin sheet. The resin sheet has its edge portions extending beyond the expandable material so that the underside surface of the edge portion constitutes a surface which can be affixed to the surface to be reinforced.