In 1893 (some say 1883), an American engineer (Kuwaiti) named Judson developed a "sliding tightening device" and obtained a patent. This was the original prototype of the zipper. The emergence of this device had an impact on the button hooks used on high boots. However, this invention did not become popular quickly. The main reason was that the quality of this early locking device was not up to standard and it was easy to loosen at inappropriate times and places, causing embarrassment.
In 1902, a company that originally produced buttons and lace became interested in Judson's invention. They bought the patent, registered the "Kubbit" trademark, and began to produce zippers for shoes. However, this "crab-eating" company soon embarked on the road to destruction. The "Kuubituo" it produced either could not be pulled up or opened, and sometimes it suddenly stretched open, causing great embarrassment to consumers. The discredited "Koubituo" became a slow-selling product, and the first company to produce zippers closed due to losses.
In 1912, Sundback, an employee of the Judson Company, improved this "automatic button" and changed each tooth on the chain into a convex and concave shape so that the teeth could It fits perfectly one-to-one and is neither easy to get stuck nor easy to detach and crack. It also has a new name - zipper.