Abstract: A separable bottom end stop for a concealed slide fastener, wherein reinforcement portions for reinforcing bent edge portions of a fastener tape are molded integrally with a box pin and a separable pin using resin, such that the reinforcement portions are swollen from a top surface of the tape, while the reinforcement portion on the box pin side is formed such that a bottom end thereof is in the same plane as the box pin. A front end of the reinforcement portion on the separable pin side has a protruded portion being protruded in parallel to the separable pin and a box has an L-shaped engaging portion and a contact portion provided on a surface thereof. When the box pin is inserted into and fixed to the box and the separable pin is inserted into the box, the protruded portion makes contact with the engaging portion.

Abstract: A separable bottom end stop for a slide fastener comprising a box, a box pin, and an insert pin. Protruding guide portions which protrude onto respective fastener tapes are integrally molded with respective side faces at tape-sides of the box pin and the insert pin via thin guide portions. The separable bottom end stop is formed of polyacetal resin, and a distance d between each outer side face of the box and each of the protruding guide portions and a protrusion height h of each of the protruding guide portions from a surface of each of the thin guide portions when the box pin and the insert pin are mounted into the box satisfy the equation (I): tan−1(d/h) ≧33°, where d≠0. The separable bottom end stop becomes hard to be broken with having excellent durability, despite using polyacetal resin which allows various coloring achieved easily, but is easy to be broken.

Abstract: A separable bottom end stop for a concealed slide fastener, wherein reinforcement portions for reinforcing bent edge portions of a fastener tape are molded integrally with a box pin and a separable pin using resin, such that the reinforcement portions are swollen from a top surface of the tape, while the reinforcement portion on the box pin side is formed such that a bottom end thereof is in the same plane as the box pin. A front end of the reinforcement portion on the separable pin side has a protruded portion being protruded in parallel to the separable pin and a box has an L-shaped engaging portion and a contact portion provided on a surface thereof. When the box pin is inserted into and fixed to the box and the separable pin is inserted into the box, the protruded portion makes contact with the engaging portion.

Abstract: A slide fastener in which an insert pin and a box pin of a separable bottom stop assembly made of synthetic resin are molded integrally along side edges of fastener tapes. The insert pin and the box pin have peripheral shapes allowing themselves to be inserted into element row guide grooves of a slider, and are molded integrally such that the entire insert pin and the box pin incline toward rear face sides of the respective tapes from their inner side edges to outer side edges relative to tape planes of the fastener, said rear face sides having no core threads of the core portions. Thus, resin layers having substantially even thickness can be formed on both the front and rear face sides of the core portions so that the resin layers never peel away from rear surfaces of the fastener tapes, and the core portions and their peripheries never become brittle.