Fastener Stringer and Slide Fastener

Abstract

For this fastener stringer, at least two stitching lines configured of stitching thread are disposed along the longitudinal direction of a tape on one surface side of the fastener elements. Each of the stitching lines has a stitch at least every two pitches of the fastener elements in the longitudinal direction of the tape and the stitches of each line are disposed so as to deviate from the stitches of the adjacent line, by at least one pitch of the fastener elements in the longitudinal direction of the tape. The fastener stringer thereby has superior fastener element dimensional precision, stitch line abrasion resistance, and flexibility. The multiple stitch lines can be made to look like a tape fabric to be inconspicuous. Moreover, in producing the fastener stringer, a stitching process of the fastener element can be performed efficiently and stably.

1 . A fastener stringer for a slide fastener in which a fastener element having a continuity shape is sealed along a tape-side edge of a fastener tape by a stitching thread, wherein:
 at least two rows of stitching lines constituted by the stitching thread are disposed on one surface side of the fastener element in the longitudinal direction of a tape,   the stitching lines has stitches in which the stitching thread stitches the fastener tape at least every two pitches of the fastener element in the longitudinal direction of the tape, respectively, and   the stitches formed on the respective rows are disposed to deviate from each other in the longitudinal direction of the tape for at least one pitch of the fastener element between the adjacent rows.   
     
     
         2 . The fastener stringer according to  claim 1 , wherein:
 the stitching line includes a first stitching line and a second stitching line that are disposed in parallel in the longitudinal direction of the tape,   the first stitching line and the second stitching line are disposed on one surface side of the fastener element sequentially from a coupling head side of the fastener element,   the stitches formed on the respective rows are disposed every two pitches of the fastener element, respectively, and   the stitch of the first stitching line is disposed to deviate from the stitch of the second stitching line by one pitch of the fastener element in the longitudinal direction of the tape.   
     
     
         3 . The fastener stringer according to  claim 1 , wherein:
 the stitching line includes a first stitching line, a second stitching line, and a third stitching line that are disposed in parallel in the longitudinal direction of the tape,   the first stitching line, the second stitching line, and the third stitching line are disposed on one surface side of the fastener element sequentially from the coupling head side of the fastener element,   the stitches formed on the respective rows are disposed every two pitches of the fastener element, respectively, and   the stitch of the second stitching line is disposed to deviate from the stitch of the first stitching line and the stitch of the third stitching line by one pitch of the fastener element in the longitudinal direction of the tape.   
     
     
         4 . The fastener stringer according to  claim 1 , wherein:
 the stitching line includes a first stitching line, a second stitching line, and a third stitching line that are disposed in parallel in the longitudinal direction of the tape,   the first stitching line, the second stitching line, and the third stitching line are disposed on one surface side of the fastener element sequentially from the coupling head side of the fastener element,   the stitches formed on the respective rows are disposed every three pitches of the fastener element, respectively,   the stitch of the second stitching line is disposed to deviate from the stitch of the first stitching line by one pitch or two pitches of the fastener element at one side in the longitudinal direction of the tape, and   the stitch of the third stitching line is disposed to deviate from the stitch of the second stitching line by one pitch of the fastener element in the longitudinal direction of the tape and disposed to deviate from the stitch of the first stitching line by two pitches or one pitch of the fastener element at one side in the longitudinal direction of the tape.   
     
     
         5 . The fastener stringer according to  claim 1 , wherein:
 one of the stitches is disposed between the adjacent fastener elements.   
     
     
         6 . The fastener stringer according to  claim 1 , wherein:
 the number of the stitching threads pressing an upper leg of each of the fastener elements is larger than that of the stitching threads shown on the other surface side of the fastener tape.   
     
     
         7 . The fastener stringer according to  claim 1 , wherein:
 each of the stitching lines is configured by a dual circular rod of the stitching thread.   
     
     
         8 . The fastener stringer according to  claim 1 , wherein:
 colors colored to the respective stitching threads are differently combined in the stitching lines which are adjacent to each other.   
     
     
         9 . The fastener stringer according to  claim 8 , wherein:
 colors respectively colored to a needle thread and a looper thread constituting each of the stitching threads are differently combined.   
     
     
         10 . The fastener stringer according to  claim 1 , wherein:
 the colors colored to the respective stitching threads are the same as each other in the stitching lines which are adjacent to each other.   
     
     
         11 . The fastener stringer according to  claim 8 , wherein:
 the color colored to the stitching thread and the color colored to the fastener tape are differently combined.   
     
     
         12 . A slide fastener, wherein:
 a pair of fastener stringers according to  claim 1  is provided at left and right sides thereof.