The encyclopedia · Product & Design · Product decision · 1928–1930
Rohwedder's 1928 bread slicer needed the wrapper to win: sliced bread goes stale fast
Sliced bread flopped until Rohwedder's machine held each loaf together with pins in its wrapper; Wonder Bread took it national by 1930.
Continental Baking (Wonder Bread)
The solution
In the 1920s Americans were switching to soft, factory-baked loaves that were almost impossible to slice neatly at home. Otto Rohwedder, an Iowa-born jeweler, spent years building an automatic bread slicer; a 1917 fire destroyed his first prototype and blueprints.
When the rebuilt power-driven, multi-bladed machine went to work at a Chillicothe, Missouri bakery in July 1928, the first loaves looked sloppy and went stale faster than unsliced bread — customers balked. Rohwedder's fix mattered as much as the slicing: U-shaped pins held the slices together inside the packaging so the loaf still appeared whole, and printed instructions told buyers how to open it.
After improvements, sliced bread took off; by 1930 it was in most American towns, and Continental Baking's Wonder Bread — the first major brand sold pre-sliced — made it a national habit. The phrase 'the greatest thing since sliced bread' entered the language.
Why it worked
- Uniform half-inch slices made soft bread usable at home.
- Pins kept the loaf looking whole, lowering the weirdness barrier.
- Packaging and instructions made the new behavior obvious.
- Wonder's national distribution turned a novelty into a standard.
What can be applied
A convenience innovation fails alone if it breaks something else (freshness); ship the complementary fix with it and make the new behavior self-evident with simple instructions.
Aftermath
Sliced bread became so essential that a World War II ban on it, meant to conserve steel and paper, provoked a national outcry and was lifted within two months. The product and the phrase survived; Wonder Bread remains an iconic American brand.
Sources
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