Abstract: A metal gasket assembly comprises a metal main plate, a metal auxiliary plate lapped with the main plate, the main plate including cylinder openings formed at positions corresponding to cylinder bores in a cylinder block of an internal combustion engine, annular beads formed around the cylinder openings and having a cross-sectional shape of ‘V’, a plurality of coolant holes formed in the peripheral parts of the annular beads, an outer peripheral bead formed at a position where it entirely surrounds the annular beads and the plurality of coolant holes, and having a slope cross-sectional shape, while the auxiliary plate including cylinder openings formed corresponding to the cylinder openings in the main plate, fold-over parts formed around the auxiliary plate cylinder openings and fold-over in a direction reverse to the direction toward the main plate, and having a width with which they are vertically lapped at least with the entire ‘V’ shape of the annular beads on the main plate, annu

Abstract: A reclaimed joint sheet used as a gasket or packing member for automobiles, ships and the like consists of a first layer of a joint sheet made from a given composition, a second layer of a joint sheet made by mixing finely pulverized pieces of the joint sheet after the punching out of the joint sheet having a given particle size with the same composition for the formation of the joint sheet, and a third layer of the same joint sheet as the first layer.

Abstract: A metal gasket assembly for a cylinder head includes a metal substrate having a predetermined shape with apertures including cylinder openings, bolt holes, coolant openings and lubricant openings. The metal substrate is further provided with half-beads in regions adjacent to the cylinder openings and full-beads in regions therearound. Ring-shaped shims are attached to the metal substrate so that they come into contact with the half-beads on a substrate surface where bulges of the full-beads are not situated.

Abstract: A metal gasket assembly for a cylinder head comprises: a metal substrate having a predetermined shape with apertures including cylinder openings, bolt holes, coolant openings and lubricant openings, which metal substrate being provided with half-beads in regions adjacent to the cylinder openings and full-beads in regions therearound; a metal sub-plate having the same planar configuration with and being thinner than the metal substrate; ring-shaped shims attached to the metal sub-plate in regions corresponding to the half-beads of the metal substrate; and a metal by-plate having the same planar configuration with the metal substrate and provided with full-beads in regions corresponding to the full-beads of the metal substrate; which metal substrate, metal sub-plate with shims and metal by-plate forming a laminated gasket assembly.

Abstract: A reclaimed joint sheet used as a gasket or packing member for automobiles, ships and the like consists of a first layer of a joint sheet made from a given composition, a second layer of a joint sheet made by mixing finely pulverized pieces of the joint sheet after the punching out of the joint sheet having a given particle size with a composition for the formation of the joint sheet, and a third layer of a joint sheet containing the same components as the first layer.

Abstract: A metal gasket assembly for a cylinder head comprises: a metal substrate having a predetermined shape with apertures including cylinder openings, bolt holes, coolant openings and lubricant openings, which metal substrate being provided with half-beads in regions adjacent to the cylinder openings and full-beads in regions therearound; a metal sub-plate having the same planar configuration with and being thinner than the metal substrate; ring-shaped shims attached to the metal sub-plate in regions corresponding to the half-beads of the metal substrate; and a metal by-plate having the same planar configuration with the metal substrate and provided with full-beads in regions corresponding to the full-beads of the metal substrate; which metal substrate, metal sub-plate with shims and metal by-plate forming a laminated gasket assembly.

Abstract: A metal gasket assembly comprises a substrate metal sheet having at least one opening, and a peripheral member fitted into the opening along the periphery thereof. The peripheral member is made of a metal plate having a thickness larger than that of the substrate metal sheet.

Abstract: A metal gasket assembly for a cylinder head includes a pair of elastic metal substrates each having an outer shape which conforms with the outer shape of the gasket assembly, cylinder openings corresponding to cylinders in the cylinder head, a peripheral region surrounding the cylinder opening, which may be greater in thickness than remaining region of the relevant substrate, and a bead in the peripheral region. The substrates are superimposed with each other with top portions of the beads of the substrates in abutment with each other. A by-plate may be arranged between the substrates and has an increased thickness in its peripheral region which surrounds the cylinder opening and which is in direct abutment with the top portions of the beads in the substrates.

Abstract: A metal gasket assembly for a cylinder head includes a metal substrate having a predetermined shape with apertures including cylinder openings, bolt holes, coolant openings and lubricant openings. The metal substrate is further provided with half-beads in regions adjacent to the cylinder openings and full-beads in regions therearound. Ring-shaped shims are attached to the metal substrate so that they come into contact with the half-beads on a substrate surface where bulges of the full-beads are not situated.

Abstract: A metal gasket assembly for a cylinder head comprises: a metal substrate having a predetermined shape with apertures including cylinder openings, bolt holes, coolant openings and lubricant openings, which metal substrate being provided with half-beads in regions adjacent to the cylinder openings and full-beads in regions therearound; a metal sub-plate having the same planar configuration with and being thinner than the metal substrate; ring-shaped shims attached to the metal sub-plate in regions corresponding to the half-beads of the metal substrate; and a metal by-plate having the same planar configuration with the metal substrate and provided with full-beads in regions corresponding to the full-beads of the metal substrate; which metal substrate, metal sub-plate with shims and metal by-plate forming a laminated gasket assembly.

Abstract: A metal gasket includes plural functional layers formed with embossments along peripheral edges of cylinder openings thereof and a backup plate not formed with any embossment and sandwiched between the functional layers. At least one edge plate is provided which is spaced radially within and is coplanar with peripheral edges of cylinder openings of the backup plate. The edge plate is different in thickness from, generally thinner than, the backup plate. Grommets are provided to fasten together the edge plate and portions of the functional layers overlapping the edge plate. With this arrangement, by selecting thicknesses of the edge plate and the backup plate so as to be different between them by a requisite value, surface pressure at peripheral edges of cylinder openings of the metal gasket can be set a desired value. Therefore, this metal gasket is superior in sealing performance and uniformity.

Abstract: A method of producing a metal gasket includes steps of alkaline cleaning a metal plate, coating a non-rinse chemical for chromate conversion of surfaces of the metal plate and drying to form chromate films, coating an adhesive on the chromate films and drying or baking the adhesive to form adhesive layers, and coating a rubber compound of a sheet-like or an amorphous mixed compound to a predetermined thickness on the adhesive layers and heating and vulcanizing the rubber compound to form rubber coated metal plate. A metal gasket manufactured in this manner has a high bonding power of the rubber layers to the metal plate to obtain an improved durability for long use.

Abstract: A method of producing a metal gasket includes steps of alkaline cleaning a metal plate, coating a non-rinse chemical for chromate conversion of surfaces of the metal plate and drying to form chromate films, coating an adhesive on the chromate films and drying or baking the adhesive to form adhesive layers, and coating rubber compound of a sheet-like or an amorphous mixed compound to a predetermined thickness on the adhesive layers and heating and vulcanizing the rubber compound to form rubber coated metal plate. A metal gasket manufactured in this manner has a high bonding power of the rubber layers to the metal plate to obtain an improved durability for long use.

Abstract: A method of producing a metal gasket having at least a cooling water opening comprises steps of coating a surface treatment agent on an outer surface of the metal gasket, covering by a masking jig the outer surface of the metal gasket except a region surrounding the cooling water opening, and removing the surface treatment agent in the region by jetting superhigh pressure water at the region.

Abstract: A metal gasket for an internal combustion engine has cylinder openings and a cooling water openings and is coated on its outer surface with a surface treatment agent. The surface treatment agent in a region of the metal gasket surrounding the cooling water openings has been removed. A method of producing a metal gasket having at least a cooling water opening comprises steps of coating a surface treatment agent on an outer surface of the metal gasket, covering by a masking jig the outer surface of the metal gasket except a region surrounding the cooling water opening, and removing the surface treatment agent in the region by jetting superhigh pressure water at the region.

Abstract: A metal gasket for a cylinder head of an internal combustion engine comprises at least one narrow portion extending between cylinder bores of the cylinder head to be sealed by the gasket, and beads extending along circumferences of the cylinder bores. The adjacent beads extend in opposite directions with respect to the gasket, thereby enabling the adjacent beads to be smoothly and gently connected. Such smoothly connected beads prevent any cracks or permanent deformations in the proximity of the beads from occuring when the gasket is firmly clamped between the cylinder head and an engine body. Restoring faculty of the gasket is not lost after being clamped therebetween, so that the sealing capacity in the proximities of the beads is remarkably improved in comparison with the prior art.