Method for manufacturing slide fastener

Abstract

A method for manufacturing a slide fastener includes: a sewing step of sewing in a state where first and second element rows are separated from each other; a dyeing step of dyeing in a state where the first and second element rows are engaged with each other and where a first fastener tape and a second fastener tape overlap with each other; and a folding step of folding the first fastener tape and the second fastener tape such that the first fastener tape and the second fastener tape are each buckled in the mountain shape and come into close contact with each other when the first and second element rows are engaged with each other.

What is claimed is: 
     
         1 . A method for manufacturing a slide fastener including a pair of first and second fastener tapes, a first element row provided at a widthwise end portion of the first fastener tape, and a second element row provided at a widthwise end portion of the second fastener tape, in which the first and second element rows are capable of engaging with and separating from each other, and when the first and second element rows are engaged with each other, the widthwise end portion of the first fastener tape and the widthwise end portion of the second fastener tape are each buckled in a mountain shape and come into close contact with each other, the method comprising:
 a sewing step of sewing the first element row to the first fastener tape, and sewing the second element row to the second fastener tape in a state where the first and second element rows are separated from each other;   a dyeing step of dyeing the first and second fastener tapes and the first and second element rows in a state where the first and second element rows are engaged with each other and where the widthwise end portion of the first fastener tape and the widthwise end portion of the second fastener tape overlap with each other in a front-rear direction; and   a folding step of folding the first fastener tape and the second fastener tape such that the widthwise end portion of the first fastener tape and the widthwise end portion of the second fastener tape are each buckled in the mountain shape and come into close contact with each other when the first and second element rows are engaged with each other.   
     
     
         2 . The method for manufacturing the slide fastener according to  claim 1 , wherein
 the sewing step includes temporary setting processing of heating the widthwise end portion of the first fastener tape and the widthwise end portion of the second fastener tape in the state where the first and second element rows are engaged with each other and where the widthwise end portion of the first fastener tape and the widthwise end portion of the second fastener tape overlap with each other in the front-rear direction.   
     
     
         3 . The method for manufacturing the slide fastener according to  claim 1 , further comprising:
 after the sewing step, a setting step of heating the first and second fastener tapes and the first and second element rows in the state where the first and second element rows are engaged with each other and where the widthwise end portion of the first fastener tape and the widthwise end portion of the second fastener tape overlap with each other in the front-rear direction.   
     
     
         4 . The method for manufacturing the slide fastener according to  claim 1 , further comprising:
 after the dyeing step, in a state where the first and second element rows are separated from each other and where the widthwise end portion of the first fastener tape and the widthwise end portion of the second fastener tape are brought close to each other,   a waterproof film bonding step of bonding a single waterproof film to the first and second fastener tapes; and   a cutting step of cutting the waterproof film along a gap between the widthwise end portions of the first and second fastener tapes to form first and second waterproof films.   
     
     
         5 . The method for manufacturing the slide fastener according to  claim 4 , further comprising:
 after the folding step, an aging step of leaving the widthwise end portions to rest for a certain period of time in a state where the first and second element rows are engaged with each other and where the widthwise end portion of the first fastener tape and the widthwise end portion of the second fastener tape are each buckled in the mountain shape and come into close contact with each other.   
     
     
         6 . The method for manufacturing the slide fastener according to  claim 1 , further comprising:
 before the folding step, a water repellent treatment step of applying a water repellent and drying the applied water repellent in the state where the first and second element rows are engaged with each other and where the widthwise end portion of the first fastener tape and the widthwise end portion of the second fastener tape overlap with each other in the front-rear direction.