Patent ID: 7353570

Claim:
A slide fastener chain equipped with fastener elements made of synthetic resin at a constant interval along opposing side edges of a pair of fastener tapes, wherein each of the fastener elements has a front surface portion and a rear surface portion which oppose each other on front and rear sides of each fastener element, the front surface portion comprises a supporting portion provided projectingly from a proximal portion to a front end while a width dimension of the supporting portion decreases gradually from a middle portion to the front end, and the front surface portion is formed into a curved face entirely swelling outwardly from a periphery of the supporting portion to a center thereof, and the rear surface portion comprises the supporting portion provided projectingly from the proximal portion to the front end, and the rear surface portion is entirely formed into a flat plane which is even and has no step while the supporting portion is provided with a neck portion in the middle portion and an expanded coupling head at the front end continuously.