Yoshida Kogyo K.k.

Akinobu Terasawa

Mitsuo Horikawa

A sliding clasp fastener which is provided has a pair of sliders for opening and closing the fastener in the forward direction and in the reverse direction, respectively. The fastener has a series of discrete coupling elements each having means for facilitating engagement of adjacent elements with minimum frictional resistance when the fastener is opened or closed in the reverse direction, such means comprising a pocket having a front end wall sloping at the outside of the pocket and being reinforced by rib means inside the pocket.

Sliding clasp fastener

A curved slide fastener chain and a method for producing a curved slide fastener are disclosed. The curved slide fastener chain comprises a pair of fastener tapes and a plurality of fastener element rows planted on each of a pair of the fastener tapes. Each of the element rows includes a straight and a curved inter-engagement portion. The curved inter-engagement portions are dis-inter-engaged while the straight inter-engagement portions are inter-engaged, so that each of the pair of fastener tapes are able to extend in a straight line. Therefore, deformation of the curved inter-engagement portions due to heat and tension applied thereto during the washing, dewatering and drying steps in producing a curved slide fastener can be prevented.

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Toyama, Japan

Akinobu Terasawa