Patent ID: 8151418
Filing Date: 2012-04-10
Classification: A44B,D03D,D10B,Y10T

Abstract:
1. A stretchable fastener stringer for a slide fastener comprising: a fastener tape which includes a tape main portion and an element attaching portion and a continuous fastener element which is attached to the element attaching portion of the fastener tape, the fastener tape has stretchability due to an elastic yarn being woven or knitted into the tape main portion and the element attaching portion, the fastener element includes a coupling head, upper and lower leg portions which are extended from the coupling head toward the tape width direction and which are attached to the element attaching portion and a connecting portion which connects the upper and lower leg portions therebetween of adjacent fastener elements, and wherein a value of a bulging ratio (=mountain length H/leg portion length d) which is the ratio between mountain length H as a dimension of the coupling head in the tape longitudinal direction and leg portion length d as a dimension of the upper and lower leg portions in the tape longitudinal direction is set to be larger than 1.80 and not larger than 2.33.