Abstract: A black metal fastener member can be manufactured at low cost. The fastener member comprises a base material made of a copper alloy containing zinc at a concentration of 30% by mass or more and 43% by mass or less, and a black copper oxide coating covering at least a part of the base material. The black copper oxide coating has a lower layer and an upper layer. The lower layer is a layer below a center line with respect to the thickness of the black copper oxide coating and the upper layer is a layer above the center line. The porosity of the lower layer is smaller than the porosity of the upper layer. In some cases, the difference between the porosity of the lower layer and the porosity of the upper layer is 10% or more.

Abstract: There is provided is a black metal fastener member that can be manufactured at low cost. A fastener member comprises a base material made of a copper alloy containing zinc at a concentration of 30% by mass or more and 43% by mass or less, and a black copper oxide coating covering at least a part of the base material.

Abstract: An improved season cracking resistance of a metallic fastener member is provided and includes a copper alloy containing zinc as a base material. The metallic fastener member includes, as a base material, a copper alloy containing zinc, and the metallic fastener member has a surface to which a rust prevention treatment has been applied and has such a property that, when analyzed by a scanning X-ray photoelectron spectroscopy apparatus, a maximum value of an atomic concentration of Mn is detected at a depth of 100 nm or less from the surface.

Abstract: A metallic fastener member has a specific color of light gold and also has high strength, discoloration resistance and high workability to withstand practical use. A metallic fastener member including a base material of a copper alloy having composition containing 1 to 30% by mass of Zn and 1 to 11% by mass of Ni, the balance being Cu and inevitable impurities, wherein the metallic fastener member has a Vickers hardness of Hv 120 or more and less than Hv 220.

Abstract: An improved season cracking resistance of a metallic fastener member is provided and includes a copper alloy containing zinc as a base material. The metallic fastener member includes, as a base material, a copper alloy containing zinc, and the metallic fastener member has a surface to which a rust prevention treatment has been applied and has such a property that, when analyzed by a scanning X-ray photoelectron spectroscopy apparatus, a maximum value of an atomic concentration of Mn is detected at a depth of 100 nm or less from the surface.

Abstract: Provided is a metallic fastener member which has a specific color, i.e., a light gold color, and has all of practical strength, unsusceptibility to discoloration, and processability. The metallic fastener member comprises, as the base material, a copper alloy having a composition which contains 1-30 mass % Zn and 1-11 mass % Ni, with the remainder comprising Cu and unavoidable impurities, and has a Vickers hardness of 120 Hv or greater but less than 220 Hv.

Abstract: A medical instrument, or collection instrument, for collecting foreign material, such as calculuses and clips that have fallen in the abdominal cavity, is disclosed. The collection instrument includes a tube (1) that is hollow in the longitudinal direction and a collection bag (2) arranged at one end of the tube (1). The collection bag includes a barrier member having a fluid passage characteristic.

Abstract: In a winding machine provided with a common bobbin holder for mounting a plurality of bobbins thereon at respective winding positions, a traverse mechanism provided with a plurality of working units, a plurality of fulcrum yarn guides disposed at respective positions above the traverse mechanism, means for collecting a plurality of yarns fed via the respective fulcrum yarn guides, means for displacing the collecting means along the common bobbin holder from a stand-by position to the supporting side of the bobbin holder, a yarn introducing and take-up device is additionally mounted on the machine so as to separately introduce the yarns one by one to the corresponding working units of the traverse mechanism while displacing the collecting means after collecting the yarns fed via the respective fulcrum yarn guides, the introducing and take-up device is provided with a yarn introducing guide disposed at a position between the fulcrum yarn guides and the traverse mechanism in a parallel condition to the bobbin ho