A gasket (13) for use in a medical syringe is provided, which includes a main body (14) made of an elastic material, and a lamination film (15) provided on a surface of the main body (14). The gasket (13) has a circumferential surface portion (17) to be kept in contact with an inner peripheral surface of a syringe barrel (11) of the syringe. The gasket (13) has a groove (22) provided in the circumferential surface portion (17) thereof as extending circumferentially thereof. The groove (22) has a depth of not less than 0.8D (m), preferably not less than D (m), wherein D (m) is the thickness of a portion of the lamination film (15) present in the circumferential surface portion (17) of the gasket (13).

An injection molding apparatus for forming a gasket around an edge of a glass is provided. The injection molding apparatus includes: an injection mold die; a fixing component, disposed inside the injection mold die and adapted for fixing the glass inside the injection mold die; a detection unit, mounted to the injection molding apparatus and adapted for detecting an image or vibration of the glass; a determination unit, coupled with the detection unit and adapted for determining whether the glass breaks based on a detection result of the detection unit. The apparatus can determine whether the glass breaks, such that the risk of scratching the injection mold die by glass breaking may be reduced. Therefore, the injection molding yield can be improved, the time for repairing the injection mold die may be reduced and a service life of the injection mold die may be prolonged.

Embodiments include a method of manufacturing a container with a leak resistant seal. The method includes forming an elastomer or a plastic or any combination thereof into a container inside out by forming an outside portion of the container on an internal surface of the container before inverting the container and forming an inside portion of the container on an external surface of the container before inverting the container. In embodiments, the method includes forming or coupling a leak resistant seal on the external surface of the container before inverting the container. The leak resistant seal provides access to the inside portion of the container when the leak resistant seal is open after inverting the container and holds at least liquid internal to the container when applying an external force to the container without use of an external structure to keep the leak resistant seal closed after inverting the container.

The invention provides a method for manufacturing a substrate-integrated gasket, the method integrating a fiber substrate which is constructed by a pulp fiber having cellulose as a main component and a gasket body which is constructed by a rubber-like elastic body according to a rubber impregnation, wherein a plurality of substrate-integrated gaskets are obtained by executing an injection molding by plural stages of rubber metal molds. Further, the rubber material is filled in plural stages of metal mold cavities by passing the rubber material through the fiber substrate in which a rubber material flow channel in the metal mold is closed at its injection pressure. The invention can reduce a man hour for removing burr and cleaning a metal mold by suppressing generation of rubber burr at the molding time and can reduce an amount of disposal of a molding material, thereby achieving a good manufacturing efficiency.

A gasket includes a reinforcing body made of a resin film, a one-side gasket body on one surface of the reinforcing body, and another-side gasket body on another surface of the reinforcing body. The reinforcing body has, between both gasket bodies, a three-dimensional shape in which the resin film is bent. The one-side gasket body includes an inversely-tapered engaging convex portion protruding toward the other-side gasket body, the reinforcing body includes a deformation portion as the three-dimensional shape deforming along a shape of the engaging convex portion, and the other-side gasket body includes an inversely-tapered engaging concave portion embedding therein the engaging convex portion and the deformation portion. At least one of the one-side gasket body and the other-side gasket body includes a flat surface-shaped seal surface, and the reinforcing body has a convex shape as the three-dimensional shape protruding toward the flat surface-shaped seal surface.

Method of manufacturing a wellbore downhole tool, including providing a pre-polymer resin and processing the pre-polymer resin. Processing the pre-polymer resin includes applying directed energy from a directed energy source such that the pre-polymer resin is at least partially polymerized to form a polymer seal of the wellbore downhole tool, the polymer seal having one of more mechanical properties that differ along one or more dimensions of the polymer seal.

A non-metallic flange isolation gasket kit sealing flanged pipeline connections and flanged vessel connections while providing electrical isolation protection between flanges suited for high-pressure and high-temperature cathodic protection applications is presented. The invention protects flange faces from media induced corrosion and mitigates flange rotation induced fatigue and failures. The invention comprises of a retainer, a seal, and a seal pre-load structural ring. The seal pre-load structural ring is inserted into the seal, and seal outer diameter surface is joined to the retainer inner diameter surface. A second embodiment comprises of a composite gasket blank, comprising of a retainer and a seal, and a seal pre-load structural ring. The seal outer diameter surface and the retainer inner diameter surface are joined by thermal fusion bonding. The invention may further comprise one or more gasket seating stress stabilizers and/or a centering ring. Tapered retainer upper and lower surfaces decrease flange rotation.

A method has the steps of forming a lot of potting portions made of a rubber-like elastic material at appropriate intervals in respect of an extending direction of the gasket main body in the one side in the thickness direction in the peripheral edge portion of the plate in such a manner as to be positioned in a forming area of the gasket main body, next, pinching a portion constructed by the peripheral edge portion of the plate and the potting portion between inner surfaces of a gasket forming cavity of the metal mold and bringing the other side in the thickness direction of the peripheral edge portion into close contact with the one inner surface of the cavity by positioning and arranging the plate within the metal mold and clamping the mold, and filling a liquid rubber material into the cavity and curing the liquid rubber material.

A laminated gasket (13) to be used for a medical syringe is provided, which includes a main body (14) made of an elastic material, and a film (15) provided on a surface of the main body (14). The gasket (13) has a circumferential surface portion (17) to be brought into contact with an inner peripheral surface (16) of a syringe barrel (11) of the syringe. The gasket (13) further includes a projection (22) provided on a surface portion of the film (15) present in the circumferential surface portion (17) as extending circumferentially of the gasket. The projection (22) has a height of not less than 15 m and not greater than 55 m and a width of not less than 30 m and not greater than 75 m. With this arrangement, the laminated gasket is excellent in sealability.