Toska Co., Ltd.

Optec Co., Ltd.

Tosca Co., Ltd.

Toyohisa Hiroki

Tadashi Suzuki

Flexible circular linking means

A bar,is provided on one extremity of an elongated filament part,a head,is provide on the other extremity of the filament part,and, at the same time, a removing portion,is provided between this head,and the filament part,and it is so composed that the head,and the filament part,can be separated easily, and a fastener affixed to the product S can be removed by manual operation.

Fastener with removable head

A process of molding a synthetic resin screw includes upper mold members 2 and 4, lower mold members 3 and 5, and four sets of slide cores 2a, 4a, 3a and 5a supported by the respective mold members and withdrawable in directions parallel to a parting plane between the upper mold members and the lower mold members.

Method of molding synthetic resin screws

A molded article having a large undercut part is efficiently produced by a method of molding a synthetic resin with the use of an apparatus comprising an outer mold (S) and an inner mold (N) arranged so as to form a cavity (C) inside the outer mold (S), said inner mold (N) comprising a central mold segment having a part whose size is reduced toward its head and mold segments (6, 7) for forming an inner surface of a molded article which are supported so as to be able to meet and get apart from each other around the central mold segment (4) and divided into a plurality of separate segments, wherein said mold segments for forming the inner surface of the molded article are rendered movable toward the center of the apparatus by moving the central mold segment and wherein the inner mold (N) is withdrawn in the form of its size reduced as a whole from inside the molded article (21) supported in the outer mold (S).

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Tokyo, Japan

Toyohisa Hiroki