Abstract: A golf club head includes a face, a sole, and a weight member. The sole includes a guide groove having a plurality of positioning grooves. The weight member includes a plurality of protrusions, and is positioned in the guide groove with the plurality of protrusions engaging with the plurality of positioning grooves. The plurality of positioning grooves each include a pair of sidewalls formed in an arc shape and a bottom connecting the sidewalls to each other. The plurality of protrusions each include a pair of side surfaces formed in an arc shape and a ridge connecting the side surfaces to each other.

Abstract: A golf club head includes a face, a sole, and a weight member. The sole includes a guide groove having a plurality of positioning grooves. The weight member includes a plurality of protrusions, and is positioned in the guide groove with the plurality of protrusions engaging with the plurality of positioning grooves. The plurality of positioning grooves each include a pair of sidewalls formed in an arc shape and a bottom connecting the sidewalls to each other. The plurality of protrusions each include a pair of side surfaces formed in an arc shape and a ridge connecting the side surfaces to each other.

Abstract: An adjustable golf club head and weight structure is disclosed. The adjustable golf club head can include a crown, a toe, a hosel, and a sole. The sole of the club head may have one or more tracks located thereon. Each of the one or more tracks can have one or more weights secured therein. Each of the one or more weights can include an upper weight portion, and a lower weight portion. A screw can be positioned to adjoin the upper weight portion and the lower weight portion. The weight can also include a clip fastened to the screw such that the clip retains the screw within bores located in the upper and lower weight portions. In order to prevent the upper and lower weight portions from rotating with respect to one another, the weight can include an alignment portion and an alignment receptacle.

Abstract: A golf club includes: a shaft (4); an adapter (3) having a shaft inserting portion (9) disposed with a shaft inserting hole (13) at one end for fixing the shaft (4) and at the other end a fixing portion (7) which is integrally disposed with the shaft inserting portion (9) with a central axis thereof deviated from a central axis of the shaft inserting portion (9) and is disposed with a concave portion (12) at least at a part of a circumferential wall surface thereof; a club head (1) including a hosel portion (2) disposed with a hosel hole (5) for inserting the adapter (3) and a through hole (10) extending from a hosel outer wall to the hosel hole (5) and located at a position corresponding to the concave portion (12) of the fixing portion (7); and a retaining means (11) passing through the through hole (10) to press the concave portion (12) so as to prevent the shaft (4) from dropping out.

Abstract: A golf club attaining good hitting feeling is provided by realizing uniform distribution of grain flows in a face portion. The golf club includes a golf head including a face portion with a ball hitting surface and a neck portion connecting the face portion to a shaft. Grain flows are formed in the golf head, and density of grain flows inside the golf head is made comparable to density of grain flows at a surface layer portion.

Abstract: A golf club that reduces discomfort feeling of a player when he/she hits a ball at a portion other than the sweet spot is provided. The golf club includes a head body including a face body with a ball hitting surface and a neck body connecting the face body to a shaft. The head body includes grain flows extending from the neck body to a toe portion of the face body, and the grain flows are formed in the head body and on a surface of the head body.

Abstract: A process for producing oxidative cross-linked polyarylene sulfide using a reaction apparatus including a reaction vessel provided with a resin inlet, a gas inlet, a resin outlet, and a gas outlet, and a transverse type heating member having a helical structure which is rotatable around a central shaft disposed in the reaction vessel. The process includes the step of supplying heated oxygen containing gas to the polyarylene sulfide from the downward direction of the transverse type heating member while the polyarylene sulfide is heated and agitated by the rotation of the transverse type heating member to carry out an oxidative cross-linking reaction of the polyarylene sulfide. According to the process, it becomes possible to increase the productivity and the gas components present in polyarylene sulfide can be effectively removed when the melt viscosity of polyarylene sulfide is increased to a desired degree after polymerizing the polyarylene sulfide.

Abstract: A process for producing oxidative cross-linked polyarylene sulfide using a reaction apparatus including a reaction vessel provided with a resin inlet, a gas inlet, a resin outlet, and a gas outlet, and a transverse type heating member having a helical structure which is rotatable around a central shaft disposed in the reaction vessel. The process includes the step of supplying heated oxygen containing gas to the polyarylene sulfide from the downward direction of the transverse type heating member while the polyarylene sulfide is heated and agitated by the rotation of the transverse type heating member to carry out an oxidative cross-linking reaction of the polyarylene sulfide. According to the process, it becomes possible to increase the productivity and the gas components present in polyarylene sulfide can be effectively removed when the melt viscosity of polyarylene sulfide is increased to a desired degree after polymerizing the polyarylene sulfide.

Abstract: The present invention provides an improvement in the process of producing pitch-based carbon fibers comprising the steps of spinning a spinnable pitch, treating the resulting pitch fibers for rendering infusible, and carbonizing the same, the improvement comprises the step of removing the surface layer from the carbon fibers obtained in said process.

Abstract: A process for producing a block copolymer composed of polyphenylene sulfide segments and polyphenylene sulfide sulfone segments comprises reacting a polyphenylene sulfide prepolymer with a mixture of a dihalodiphenyl sulfone and a sulfidization agent, or a polyphenylene sulfide sulfone prepolymer with a mixture of a polyhalogenated aromatic compound and a sulfidization agent.

Abstract: A resin composition comprising (a) 100 parts by weight of a block copolymer composed of polyphenylene sulfide segments and polyphenylene sulfide sulfone segments and (b) 0.01 to 20 parts by weight of at least one compound selected from the group consisting of epoxy resins, maleimide compounds, N,N'-diarylcarbodiimide compounds and organosilane compounds and as required, (c) an organic filler.