Abstract: A buckle comprises a locking crossbar connected at its ends to respective ends of a pair of parallel side bars and a wrapping crossbar disposed in parallel spaced relation to the locking crossbar and connected at its ends with the side bars at their respective intermediate positions. The wrapping crossbar has a pair of juxtaposed sharp projecting ridges each extending longitudinally thereof; one projecting ridge being provided on the upper surface of the wrapping crossbar and the other on that side of the wrapping crossbar which is remote from the locking crossbar for increased frictional resistance of the belt to be inserted through the buckle.

Abstract: A buckle for connecting opposite ends of a belt or the like is disclosed. the buckle comprises a plug member and a socket member releasably engageable therewith. The socket member has a central through-opening for accommodating a locking member and a spring member which has a plurality of integrally formed strip-like spring elements arranged to provide uniform distribution of pressure over the locking member.

Abstract: A buckle for connecting the ends of a belt used in clothes and the like. The buckle consists of a socket, which has a hollow socket-body and a locking-device, and a plug, which as a pair of engaging members. The locking device has a locking-plate and a pressuring projection. A resilient engaged member is provided in the socket-body so as to be engaged to and disengaged from the engaging members of the plug. According to this buckle, when the pressuring projection is located at the bottom shell-side, even if the locking-plate is pressured, the locking-plate and the resilient engaged member are provided so as not to be brought into contact each other resulting in ensuring the engagement of the plug and the socket.

Abstract: A thumb turn latch includes a latch body having a split shank snap-fitted in a stepped hole in a retainer. The stepped hole has a cam surface engageable with an enlarged foot on the split shank to urge the latch body toward the retainer.

Abstract: A slide fastener comprising a fastener tape and a continuous synthetic resin fastener element row produced by extruding means having a series of cavities and secured to one side edge of the fastener tape by means of element securing threads is disclosed. The fastener element row includes a plurality of individual fastener elements each including an engaging head and upper and lower legs extending from the engaging head. The individual fastener elements are in series connected at regular spaces by upper and lower synthetic resin spacer means integrally formed with the fastener elements adjacent to the free ends of the legs. The spacer means has a minimum cross sectional area in the central portion thereof and the diameter gradually increases from the central portion toward and being connected to the opposing walls of adjacent fastener elements.

Abstract: A cord lock is composed of only two component parts, namely a one-piece socket molded of synthetic resin and having a pair of resilient flaps, and a one-piece plug molded of synthetic resin and having a wedge-shaped end portion engageable with the resilient flaps and coacting with the latter for urging the plug axially upwardly under the resiliency of the resilient flaps.

Abstract: A slide fastener stringer comprises an elongate molded coupling element strip woven into a stringer tape along a longitudinal edge thereof. The strip includes a succession of laterally spaced coupling elements each having a pair of first and second legs, and a pair of series of first and second connecting portions extending respectively between alternate pairs of the first legs and between alternate pairs of the second legs in staggered relation with each other. A pair of connector threads is partially embedded in the first and second legs, respectively, of each coupling element and extends parallel to the first and second connecting portions, respectively, on the head side of the coupling elements. Each of the coupling elements has a pair of grooves extending transversely through a pair of first and second legs, respectively, on their outer sides, and disposed remotely from the connecting portions and from the connector threads.

Abstract: A concealed slide fastener comprising an engageable pair of stringers individually consisting of a woven fabric tape and an element attached along a side edge portion of the tape, in which employed for the warp yarn woven in at such a portion of the tape which substantially corresponds to the center of a coupling head of the element and along which the tape is double folded is finer than the warp yarn woven in the rest portion of the tape, for an improved ease and accuracy of the tape folding and also an improved fastener concealing performance.

Abstract: A stringer tape is made of a woven fabric the warp and/or weft of which is constituted of yarns composed of synthetic fibers or filaments or of blends of synthetic and other fibers or filaments. At each end of the stringer tape, formed by severance of the tape from a continuous length of such fabric tape, there are formed a plurality of thermally fused regions to prevent the unraveling of the fabric. The thermally fused regions are spaced from each other in the transverse direction of the tape.