Showa Denko Kabushiki Kaisha

Showa Denko K.k.

Otohiko Miyauchi

Junji Yotsuyanagi

Takashi Suzuki

Tetsuo Yasuda

Michihiro Ohkawachi

Yasuzo Uchida

Yoshihiko Kawakami

Mitsuo Imai

A method for manufacturing a cover for a can-like container providing improved peelability of a handle. The cover is made by forming a second resin layer by injection molding or compression forming on a multi-layer sheet which oxygen, water, and the like cannot permeate. A thermally weldable first resin layer is provided on the upper surface of the multi-layer sheet. The handle is formed by the second resin layer. A treatment is carried out for allowing the handle to be easily peeled off the multi-layer sheet to all or part of a region of the multi-layer sheet in contact with the underside of the handle.

Method of manufacturing container covers

In a can-shaped container comprising: a container body including a cup-shaped container base with a flange at its opening, the container base being formed by using a plate-shaped multi-layer base material made up of an intermediate layer and thermally weldable resin layers formed on both sides of the intermediate layer in such a manner that wrinkles are formed in the cylindrical wall, and an injected resin layer formed on the outer surface of the container base by injection molding in such a manner that the injected resin layer extends from the outer periphery of the flange of the container base, thus forming an injected resin flange, the two flanges forming a lid sealing region; and a lid thermally welded to the lid sealing region of the container body; the outer periphery of the flange of the container base is located at least 1 mm inwardly away from the outer periphery of the injected resin flange, and the sealing strength of the flange of the container base with the lid is greater than the sealing strength of the injected resin flange with the lid, whereby the container will never is broken or blasted when dropped or subjected to retort sterilization, and the lid can be readily peeled off when necessary.

Container

An injection molding method in which an insert is inserted into a metal mold assembly in advance of molten material by providing a guide member having an aperture in which the insert is inserted, the insert and aperture having relative dimensions such that the insert is forcibly retained in the aperture and to properly locate the insert for injection molding and thereby prevent displacement of the insert during injection molding.

Method of insert injection molding

A cover for a can comprising a multi-layer base of aluminum foil between heat-fusible resin layers and an overlying laminated resin layer. The outer resin layer has an inner section and a surrounding outer section separated by a gap through which the multi-layer base is exposed. The gap is smooth and continuous, that is, does not have a point, so that the inner section can be leveraged into the multi-layer base and the stress is uniformly distributed over a wide area of the multi-layer base.

Cover for a can-shaped container

A can-like container and a method for manufacturing such a container which provides a strong structure, tight gas barrier, and no effect upon the taste of food stored in the container. The body of the container is fabricated with a multi-layer sheet composed of a metal foil layer having a thickness of no more than 40 .mu.m and a hot-melt resin layer formed on one or both sides of the metal foil layer. The margin portions of the multi-layer material of the container body in corners thereof are either folded into two tucks at each corner or formed into vertical wrinkles upon molding the container body. A cover is joined to the container body, which cover is also composed of a metal foil layer and at least hot-melt resin layer.

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Kanagawa, Japan

Otohiko Miyauchi