Every Metallurgist Told Gillette His Razor Blade Was Impossible. It Took Six Years and an MIT Machinist.

US775134 was granted to King Camp Gillette on November 15, 1904. The title is "Razor." It covers the safety razor with a thin, replaceable, double-edged blade — the object that created both the modern shaving industry and the business model now used to sell printers, game consoles, and coffee machines.

Gillette had the idea around 1895. He had been told by his employer William Painter, inventor of the disposable bottle cap, to find something people would use once and buy again. Shaving fit perfectly: straight razors were expensive, dangerous, and required constant stropping and professional honing.

The concept was simple. Clamp a very thin piece of steel in a holder that exposes only a sliver of edge, so the user cannot cut themselves badly, and make the steel cheap enough to discard when dull rather than sharpen.

Six years of being told no

The manufacturing was not simple at all, and this is the part usually skipped.

A blade that is thin enough to be disposable is thin enough to flex, and a flexing blade does not shave. To hold a keen edge, steel must be hardened — and hardening thin steel warps it. Grinding a hardened, warped ribbon of steel to a uniform edge across its whole length, cheaply, at scale, was beyond the standard practice of the era.

Gillette consulted metallurgists at MIT and elsewhere. He was told repeatedly, by people who knew what they were talking about, that what he wanted could not be manufactured.

He spent roughly six years failing anyway. The breakthrough came through William Nickerson, an MIT-trained engineer and machinist who worked out the processes — hardening, flattening, and grinding the thin stock to a consistent edge — that made mass production possible. Nickerson's contribution is arguably the harder half of the invention.

Fifty-one blades

The first year of sales, 1903, produced numbers that would end most ventures: 51 blades and 168 razors.

The second year they sold about 90,000 blades. By 1908 they were selling in the millions. The economics Painter had described worked exactly as predicted — the razor was a one-time purchase that created a permanent customer for blades.

The First World War accelerated it enormously. The US military issued safety razors to servicemen, partly because gas masks require a clean-shaven face to seal properly. Millions of men came home with the habit and the handle, needing blades.

The model

"Give away the razor, sell the blades" is now taught as a standard business strategy, though the phrase overstates what Gillette actually did — his razors were never free, and were initially quite expensive.

What he genuinely established is subtler and more durable: that the profitable object is not the durable one. It is the consumable that the durable one requires. Every printer cartridge, coffee pod, and game disc sold since is working from the template of a man who spent six years being told his blade could not be made.

See the original

The full text and figures of US775134 are on patents.us.