A multi airtight type rail zipper may be attached to or installed on a flexible material, such as an envelope, for storing an object. The multi airtight type rail zipper includes a first zipper rail, a second zipper rail formed in a shape corresponding to that of the first zipper rail, and a slider provided to surround the first zipper rail and the second zipper rail such that, according to the direction of sliding movement, the first zipper rail and the second zipper rail engage with and are fastened to each other, or disengage and are unfastened from each other. The multi airtight type rail zipper can improve the sealing force by the more stable fastening structure.

These slide fastener-attached products each have: a pair of element members in which fastener elements are attached to a fixing member; a fastener attached member provided with a pair of element attaching edge portion; and sliders. The element members are directly fixed to the element attaching edge portions by sewn portion for fixing, the sewn portion for fixing pierce and pass through the element attaching edge portions, and the sewing thread of the sewn portion for fixing hold the fixing member. In addition, the slide fastener-attached products are provided with protective parts which protect at least a part of the element attaching edge portions from contact with the sliders. Thus, lightweight and improved flexibility of the slide fastener-attached products can be achieved, and the durability of the element attaching edge portions can be improved.

These slide fastener-attached products each have: a pair of element members in which fastener elements are attached to a fixing member; a fastener attached member provided with a pair of element attaching edge portion; and sliders. The element members are directly fixed to the element attaching edge portions by sewn portion for fixing, the sewn portion for fixing pierce and pass through the element attaching edge portions, and the sewing thread of the sewn portion for fixing hold the fixing member. In addition, the slide fastener-attached products are provided with protective parts which protect at least a part of the element attaching edge portions from contact with the sliders. Thus, lightweight and improved flexibility of the slide fastener-attached products can be achieved, and the durability of the element attaching edge portions can be improved.

A slide fastener-attached product has a first element member in which an insert pin portion is attached to a fixing member, a second element member in which a box portion is attached to a fixing member and fastener attached members having a pair of element attaching edge portions in a position facing to each other. The first element member and the second element member have an element holding portion and a component holding portion in which the insert pin portion or the box portion is attached with respect to the length direction of the fixing member, and at least the component holding portion is fixed to the element attaching edge portion of the fastener attached member with a component sewn portion which is formed of sewing threads and pierces the fastener attached member. The product provides weight saving, improved softness, and an easily separable rear end stop.

A fastener stringer for a concealed slide fastener in which a knitted fastener tape has a tape main body portion and a doubled-tape portion that is formed by extending in a width direction from the tape main body portion and being folded back, wherein at least a chain stitch yarn is included in each wale forming the tape main body portion, and wales forming the doubled-tape portion have at least one wide wale having a second wale width that is greater than the first wale width of the wale forming the tape main body portion. The doubled-tape portion of the fastener tape can thereby be provided with superior flexibility.

A fastener stringer for a concealed slide fastener in which a knitted fastener tape has a tape main body portion and a doubled-tape portion that is formed by extending in a width direction from the tape main body portion and being folded back, wherein at least a chain stitch yarn is included in each wale forming the tape main body portion, and wales forming the doubled-tape portion have at least one wide wale having a second wale width that is greater than the first wale width of the wale forming the tape main body portion. The doubled-tape portion of the fastener tape can thereby be provided with superior flexibility.

A slide fastener-attached product includes a pair of element members and a fastener attached member having a pair of element attaching edge portions to which the element members are attached at positions. A fixing member includes an element holding portion and an extending portion extending further in one direction of a length direction than the element holding portion. The element member is fixed to the element attaching edge portion of the fastener attached member with a sewn portion for fixing of a sewing thread, and the extending portion of the fixing member is fixed to the element attaching edge portion with the sewn portion for fixing. A member attaching portion to which a component part of a separable rear end stop is attached is formed of a part including the extending portion. Thereby, a weight reduction and improvement of flexibility can be attained.

A waterproof fastener chain includes: a pair of fastener tapes made of polyester resin adjacent to each other at a given space between each side edge thereof, rows of elements respectively attached onto a main surface of the side edge of each of the fastener tapes, and waterproof coated films made of polyester resin respectively formed on a main surface of each of the fastener tapes. An outer surface of each of the waterproof coated films is flat at least at a position where a slider is to pass over, each of the waterproof coated films penetrates into irregularities on the main surface of each of the fastener tapes, a penetration depth of the waterproof coated films into a gap caused by the space of the pair of fastener tapes is not more than thickness of the fastener tapes.

A waterproof fastener chain includes: a pair of fastener tapes made of polyester resin adjacent to each other at a given space between each side edge thereof, rows of elements respectively attached onto a main surface of the side edge of each of the fastener tapes, and waterproof coated films made of polyester resin respectively formed on a main surface of each of the fastener tapes. An outer surface of each of the waterproof coated films is flat at least at a position where a slider is to pass over, each of the waterproof coated films penetrates into irregularities on the main surface of each of the fastener tapes, a penetration depth of the waterproof coated films into a gap caused by the space of the pair of fastener tapes is not more than thickness of the fastener tapes.

A zip fastener (10) comprises two opposed sets of teeth (14) which are shaped such that those on one set (12a) can fit between those on the other set (12b). At least some adjacent teeth of opposed sets (12a, 12b) have facing surfaces (17a, 17b) shaped so as engage and to inhibit lateral separation of the sets, and such that each tooth can undergo at least limited angular movement relative to the adjacent tooth. The teeth (14) within a set (12) are held at a predetermined spacing along the set by linking strips (16) aligned generally along the center line of the set (12). Each tooth (14) defines a strip location (20) facing the opposed set of teeth, such that the linking strip (16) on one set (12a) fits in the strip location (20) on the other set (12b). Since the tooth spacing is set by the linking strips (16), the sets (12) of teeth (14) can lie on a curved path.