公开(公告)号：US20210085038A1

公开(公告)日：2021-03-25

申请号：US16470975

申请日：2018-11-20

申请人： Bright Technology Co., Ltd.

发明人： Guoliang HUANG

IPC分类号： A44B19/26 ,  A44B19/04

摘要： A half-round zipper is provided, including chain teeth, top stops and teeth stringers. Each of the chain teeth has a tooth root provided with a left tooth and a right tooth curved with respect to each other, and has a tooth top provided with an engaging boss and an engaging groove which are arranged respectively on both sides of the tooth top and configured to be engagable with each other, and has an arc-shaped longitudinal cross-section with the center angle of a right angle. Two of the chain teeth are engaged with each other to form a half-round shape. Each of the top stops includes an upper end portion with an arc cross-section and a lower end portion with a horizontally or obliquely flat bottom surface, and is engaged to the inner side of the respective one of the teeth stringers by means of a first holding groove.