Abstract: A flexible joint for a culvert includes a pair of annular connecting members, a flexible sealing member fixed to the connecting members, bearing means provided radially inwardly of the flexible sealing member and fixed to the connecting members for supporting the flexible sealing member to prevent inward deformation of the flexible sealing member. The bearing means may consist of bearing bars arranged circumferentially or may consist of a pair of annular support members. The flexible joint further includes cylinders fitted loosely on the bearing bars. The flexible joint may further include an annular joint filling member provided between the connecting members for preventing flowing of secondary lining concrete into space between the connecting members and having a thickness in the radial direction which enables continuous depositing of the concrete from one culvert unit to another culvert unit to be joined together.

Abstract: A flexible joint for a culvert includes a pair of annular connecting members, a flexible sealing member fixed to the connecting members, bearing means provided radially inwardly of the flexible sealing member and fixed to the connecting members for supporting the flexible sealing member to prevent inward deformation of the flexible sealing member. The bearing means may consist of bearing bars arranged circumferentially or may consist of a pair of annular support members. The flexible joint further includes cylinders fitted loosely on the bearing bars. The flexible joint may further include an annular joint filling member provided between the connecting members for preventing flowing of secondary lining concrete into space between the connecting members and having a thickness in the radial direction which enables continuous depositing of the concrete from one culvert unit to another culvert unit to be joined together.

Abstract: A flexible joint for a culvert includes a pair of annular connecting members, a flexible sealing member fixed to the connecting members, bearing means provided radially inwardly of the flexible sealing member and fixed to the connecting members for supporting the flexible sealing member to prevent inward deformation of the flexible sealing member. The bearing means may consist of bearing bars arranged circumferentially or may consist of a pair of annular support members. The flexible joint further includes cylinders fitted loosely on the bearing bars. The flexible joint may further include an annular joint filling member provided between the connecting members for preventing flowing of secondary lining concrete into space between the connecting members and having a thickness in the radial direction which enables continuous depositing of the concrete from one culvert unit to another culvert unit to be joined together.

Abstract: A pavement marking sheet material of an improved durability comprises a laminate of a base layer containing unvulcanized synthetic rubber as a main ingredient and a colored layer of unvulcanized synthetic rubber containing a coloring agent and glass microspheres dispersed over the suface of the colored layer. The lower portions of the microspheres are embedded in the base layer and the remaining surfaces of the microspheres and the surface of the laminate are covered integrally with a surface layer of a thin film consisting of a transparent and colorless synthetic resin. The glass microspheres are prevented from coming off by the cooperation between the three layers and wear of the sheet itself is substantially reduced.

Abstract: A pavement-marking tape applicator comprises a carrier which has at least one wheel and an application roller and moves along a paved surface on which a pavement-marking tape is to be applied. A roll of pavement-marking tape is unwindably supported on the carrier. A pair of free end position adjusting rollers are mounted on the carrier for holding the unwound tape at such a position that the tape hangs in front of the application roller. The free end position adjusting rollers are capable of finely adjusting the free end position of the tape. A drive mechanism for manually or electrically rotating these free end position adjusting rollers is provided. In one aspect of the invention the pavement-marking tape applicator comprises a cutter mounted on the carrier for cutting the tape after completion of application of the tape on the paved surface.

Abstract: In a high-brightness pavement marking sheet material, a continuous pattern of a multiplicity of protuberances and depressions is formed on the surface of a base sheet made of rubber, synthetic resin or the like and that glass microspheres are embedded in these protuberances and depressions in such a manner that a depth of embedding of these glass microspheres in the base sheet from the surface is randomly different one from another and a majority of the glass microspheres in these protuberances and depressions are partially exposed from the surface of the base sheet. An excellent initial brightness is obtained and brightness at a high level is continuously maintained despite wear of the base sheet.

Abstract: A rock crushing device according to the present invention is designed to crush rocks by the use of the expansion pressure generated when an elastic expandable member of a cylindrical configuration is expanded by pressure fluid to be injected into looped pockets provided within the elastic member. The elastic member, made of rubber or similar materials, is provided tightly to cover around a metal shaft having a fluid passage to introduce pressure fluid into the looped pockets of the elastic member.

Abstract: A reflex-reflecting sheeting of a type having on the surface of the sheeting many isolated small compartments which are respectively hermetically sealed in the form of cells is characterized in the structure in which a support film comprises an upper layer which is in contact with glass beads and a lower layer disposed on the opposite side and having larger cohesive force and rubbery elasticity than the upper layer, and a protective film made of a substantially unoriented resin. The sheeting thus constructed exhibits strong resistance against separation of the protective film and the support film even under high temperature and humidity.

Abstract: The present invention relates to a flexible joint to be inserted between culvert sections. In a culvert joint which consists of anchor members attached to the opposing culvert sections, a flexible member extending between said anchor members and a large number of strengthening members arranged in parallel at the internal and external positions of said flexible member, said strengthening members being classified into one with projections and one with holes to regulate the distance between them; the projections of said member with projections fit into the holes of said member with holes to overlap each other, thereby regulating the distance between them to follow an expansion and contraction or an uneven subsidence of the culvert and therefore, bearing earth pressure sufficiently.

Abstract: Glass compositions having a refractive index of over 2.10 composed of the following metal oxides, in weight percent; 40.0 to 54.0% of TiO.sub.2, 24.0 to 44.0% of BaO, 5.0 to 15.0% of ZnO, 3.0 to 13.0% of ZrO.sub.2, 0.2 to 3.0% of CaO, 0.2 to 3.0% of MgO, 0.2 to 2.0% of SiO.sub.2, 0.1 to 0.5% of Na.sub.2 O and/or K.sub.2 O, and whose total weight exceeds 98.0% and moreover essentially without containing B.sub.2 O.sub.3.

Abstract: Joint to be used between culvert sections and the like comprising short tubular flexible members made of elastic material to be attached to the ends of adjoining culvert sections and a plurality of strengthening members extending between the ends of these sections. The strengthening members are provided inside and outside of said flexible members and are adjustable to accommodate variations in the gap between the adjoining sections.

Abstract: A reflex light reflecting sheet or reflective structure whereby incident light is reflected from a reflective layer on the rear of the structure through a plurality of small transparent balls, wherein a surface coating layer which is transparent and flat is formed over the surfaces of said balls, said layer being composed of two sub-layers between which is provided a printed portion using fine lines for printing, such that the printed portion is visible in scattered light in the daytime but invisible in reflected light in the nighttime.

Abstract: A reflex light reflector or reflective structure whereby incident light is reflected from a reflective layer on the rear of the structure through a plurality of small transparent balls, wherein a transparent flat coating layer is formed over the surfaces of said balls, said layer being composed of two sub-layers between which is provided a printed surface using fine lines for printing, such that the printed matter is visible in scattered light in the daytime but invisible in reflected light in the nighttime.