A durable nylon zip fastener is formed from a pull and two chains. A chain is formed from chain teeth joined to a cloth tape by means of sewing thread. The pull comprises an upper wing plate and a lower wing plate, the upper wing plate and the lower wing plate being connected together by means of a support core therebetween, forming an accommodation cavity permitting the chains to pass through. The accommodation cavity is provided with two guide inlet openings near a support core end, used to guide in each of the two chains. Another end of the accommodation chamber is provided with a meshing exit opening, used to guide out the two meshed chains. The upper wing plate comprises an upper plate body holding the chain teeth from above and an upper flange part holding the chain teeth from two sides.

A durable nylon zip fastener is formed from a pull and two chains. A chain is formed from chain teeth joined to a cloth tape by means of sewing thread. The pull comprises an upper wing plate and a lower wing plate, the upper wing plate and the lower wing plate being connected together by means of a support core therebetween, forming an accommodation cavity permitting the chains to pass through. The accommodation cavity is provided with two guide inlet openings near a support core end, used to guide in each of the two chains. Another end of the accommodation chamber is provided with a meshing exit opening, used to guide out the two meshed chains. The upper wing plate comprises an upper plate body holding the chain teeth from above and an upper flange part holding the chain teeth from two sides.

Provided is a copper alloy fastener element which improves season cracking resistance by a means different from that of increasing a ratio of a β phase. The copper alloy fastener element includes a copper-zinc alloy as a base material, the base material having: an apparent zinc content of from 34 to 38%; a dendrite structure; and a β phase at a ratio of 10% or less.

Provided is a copper alloy fastener element which improves season cracking resistance by a means different from that of increasing a ratio of a β phase. The copper alloy fastener element includes a copper-zinc alloy as a base material, the base material having: an apparent zinc content of from 34 to 38%; a dendrite structure; and a β phase at a ratio of 10% or less.

A method for sewing a slide fastener includes forming end edge portion needle drop points in at least two positions, within an overlapped portion in which the work piece is folded, within a range more toward a tip side of an end edge portion of the work piece than half of an overlapped width, and within a range on an inner side of a width of a leg portion of an interlocking element. Sewing is performed with sewing thread passing from a head portion needle drop point to the end edge portion needle drop point of one end portion and sewing thread passing from the end edge portion needle drop point of another end portion to the head portion needle drop point of an adjacent interlocking element each passing either side of the leg portion.

This disclosure describes a releasable fastener having two portions that slide together to affix two portions of an article. For example, the two portions may include an elongated rail that slides into an elongated slot or tube.

This disclosure describes a releasable fastener having two portions that slide together to affix two portions of an article. For example, the two portions may include an elongated rail that slides into an elongated slot or tube.

A zipper structure is provided and includes a first zipper component including a first zipper portion, a second zipper component including a second zipper portion, and a sealing end assembly. An end part of the first zipper portion of the first zipper component adjacent to an end of the first zipper component and an end part of the second zipper portion of the second zipper component adjacent to an end of the second zipper component are engaged with each other. The sealing end assembly is connected to the ends of the first zipper component and the second zipper component by injection molding and covers surfaces of the ends of the first zipper component and the second zipper component. A gap between the end parts of the first zipper portion and the second zipper portion is filled with the sealing end assembly. Furthermore, a related zipper bag is also provided.

A zipper structure is provided and includes a first zipper component including a first zipper portion, a second zipper component including a second zipper portion, and a sealing end assembly. An end part of the first zipper portion of the first zipper component adjacent to an end of the first zipper component and an end part of the second zipper portion of the second zipper component adjacent to an end of the second zipper component are engaged with each other. The sealing end assembly is connected to the ends of the first zipper component and the second zipper component by injection molding and covers surfaces of the ends of the first zipper component and the second zipper component. A gap between the end parts of the first zipper portion and the second zipper portion is filled with the sealing end assembly. Furthermore, a related zipper bag is also provided.

A method for sewing a slide fastener includes forming end edge portion needle drop points in at least two positions, within an overlapped portion in which the work piece is folded, within a range more toward a tip side of an end edge portion of the work piece than half of an overlapped width, and within a range on an inner side of a width of a leg portion of an interlocking element. Sewing is performed with sewing thread passing from a head portion needle drop point to the end edge portion needle drop point of one end portion and sewing thread passing from the end edge portion needle drop point of another end portion to the head portion needle drop point of an adjacent interlocking element each passing either side of the leg portion.