Thirty Years, Three Inventors, and One Tiny Fix: The Zipper Almost Never Made It

You've probably zipped something up already today. A jacket, a bag, a pair of boots. The motion is so automatic it doesn't even register anymore. You just do it. But the zipper — that simple, satisfying slide of interlocking teeth — is the product of one of the longer and more contentious invention stories in American manufacturing history. It took roughly three decades, three different inventors, and one almost laughably small design adjustment to produce something that actually functioned reliably.

For a device that now appears on billions of garments and accessories worldwide, the zipper came remarkably close to never existing at all.

The First Attempt: Close, But Completely Wrong

The earliest version of what we now recognize as a zipper was patented in 1851 by Elias Howe — the same man who invented the sewing machine. Howe called his invention an "Automatic, Continuous Clothing Closure." That name should give you a sense of how early in the process everyone was.

Howe's design used a series of clasps connected along two parallel fabric edges that could be fastened together by running a ring along them. In theory, it was the right idea. In practice, it was stiff, unreliable, and prone to popping open at inopportune moments. Howe, flush with success from the sewing machine and not particularly hungry for another fight, never bothered to market it. The patent sat largely ignored.

For the next four decades, the problem went unsolved. Buttons remained the dominant fastening technology on everything from boots to trousers to overcoats. The idea of a faster, sliding closure existed, but nobody had made one that worked well enough to matter.

Enter Whitcomb Judson — And the Mess He Made

In 1893, a Chicago inventor named Whitcomb Judson arrived at the World's Columbian Exposition with a device he called the "Clasp Locker." His pitch was practical: it was a hook-and-eye fastener that could be opened and closed with a single sliding guide, designed primarily for boots. In an era when high-laced boots were standard and bending down to fasten them was a daily inconvenience, Judson saw a real market.

The exposition crowds found it interesting. The fashion and garment industries found it underwhelming. The Clasp Locker was bulky, expensive to manufacture, and had a frustrating habit of either jamming shut or bursting open under normal use. Judson spent years refining it, filing additional patents, and trying to convince manufacturers to adopt it. He found almost no takers.

Judson and his business partner Lewis Walker eventually formed a company to produce the device — which went through several name changes and struggled financially throughout its early years. The product reached a small commercial audience by the early 1900s but never achieved anything close to mainstream adoption. It was a solution that still hadn't solved the problem.

The Fix That Actually Fixed It

The breakthrough came from a Swedish-American engineer named Gideon Sundback, who joined Judson's struggling company in 1906. Sundback was methodical where his predecessors had been impulsive, and he approached the fastener problem as an engineering challenge rather than a sales challenge.

By 1913, he had developed a design he called the "Hookless Fastener" — a radical rethinking of how the interlocking mechanism worked. Instead of hooks and eyes or clasps, Sundback created two rows of identical, spoon-shaped teeth that nested together when a slider passed over them. The teeth were stamped from metal, evenly spaced, and designed to interlock at precisely the right angle. The slider itself was the key: it created a wedge action that forced the teeth together on one pass and separated them cleanly on the reverse.

Sundback also increased the number of teeth per inch, which gave the closure more flexibility and made it far less likely to jam or pop open. He patented the design in 1917, and it is essentially the zipper you use today.

How "Zipper" Became a Word

For the first several years after Sundback's patent, the hookless fastener was used almost exclusively on rubber galoshes and tobacco pouches — practical applications, but hardly glamorous ones. The B.F. Goodrich Company became one of the early adopters, using it on a line of rubber boots they introduced around 1923.

It was a Goodrich executive who reportedly coined the name "zipper" — onomatopoeia for the sound the slider made as it moved along the teeth. The word caught on faster than the product itself. For years, "zipper" referred specifically to the Goodrich boot, not to the fastener mechanism.

The fashion industry held out for a surprisingly long time. Buttons were familiar, reliable, and — crucially — trusted by tailors and manufacturers who had no interest in retooling their operations for an unproven mechanism. The zipper didn't begin its serious push into clothing until the late 1920s and early 1930s, when designers started using it on children's clothing (marketed as a tool for teaching kids to dress themselves) and eventually on men's trousers.

The Moment Fashion Finally Said Yes

The cultural tipping point arrived in 1937, when the fashion press declared a minor war between the zipper and the button. Esquire magazine came down firmly on the side of the zipper for men's trousers, calling buttons old-fashioned and impractical. French fashion designers — always an influence on American style — began incorporating zippers into high-end garments. The combination of editorial endorsement and designer adoption was enough to shift the industry.

By the 1940s, wartime material conservation pushed manufacturers further toward zippers, since a single zipper replaced multiple buttons and the metal hooks or clasps they required. The military adopted them widely. By the time American soldiers came home from World War II, the zipper was no longer a novelty — it was a standard.

What Took So Long

The honest answer is that the zipper took thirty years to work because the problem it was solving wasn't purely mechanical. It was also social. Buttons were embedded in clothing culture in a way that made any alternative feel risky and strange. Manufacturers didn't want to change their equipment. Tailors didn't want to change their methods. Consumers didn't ask for something different because they didn't know something different was possible.

Sundback's design solved the mechanical problem in 1913. It took another two decades for the culture to catch up.

Which might be the most honest thing the zipper's history tells us: sometimes the invention is the easy part.