Zippers
A zipper is a fastening device consisting of two parallel strips of material fitted with interlocking teeth or coils that are joined or separated by a slider mechanism. The slider pulls the teeth together to close the zipper or pulls them apart to open it. This mechanical design allows for quick, reliable fastening of garments, bags, and other items. The basic principle—using small, precisely manufactured teeth that interlock under the action of a slider—has remained relatively consistent since the device’s practical refinement in the early twentieth century.
Development and History
The zipper evolved from earlier fastening concepts, with Whitcomb Judson patenting a “clasp locker” in 1891, though his design was unreliable and prone to jamming. Gideon Sundback, a Swedish engineer working for Judson’s company, developed an improved version called the “Hookless Fastener” in 1913, which featured interlocking scoops rather than hooks. The modern tooth-based design emerged through further refinements, and the term “zipper” was adopted by the B.F. Goodrich Company in the 1920s when describing rubber boots with the fasteners. The devices gained widespread popularity in clothing and luggage throughout the mid-twentieth century.
Manufacturing and Global Production
YKK (Yoshida Kogyo Kabushikikaisha), a Japanese company founded in 1934, became the world’s largest zipper manufacturer and continues to dominate global production. YKK pioneered standardized manufacturing processes and vertical integration, controlling production from raw materials to finished products. The company’s efficiency and quality standards made zippers affordable for mass-market applications and established YKK as the supplier for major clothing and luggage manufacturers worldwide. Other manufacturers emerged over time, but YKK maintains a substantial market share due to its established infrastructure and reputation for consistency.
Source Notes
- 2026-04-10: Why are these 3 letters on almost all of my zippers?
- 2026-04-08: From Clasp Locker to YKK The History and Engineering of Zippers · ▶ source