Be it known that I, MAGNUS H. JOHANSON, a subject of the King of Sweden, residing at Rochester, in the county of Monroe and State of New York, have invented new and useful improvements in Safety-Razors and Safety-Razor Blades.
His improvement on the blade is less of an improvement and more of an added step (and cost) in production:
The blade 13 is of generally semi-circular contour, and rests snugly upon the support 10, as shown. lt's inner surface is formed on the true arc of` a circle, and blade 13 is provided at each end with a notch 15, said notch being preferably disposed centrally.Part of what made the Gillette successful is that the blade is cheap to make and can be spat out in huge numbers by simple machines, and this is mostly because of the shape. Adding a curve to a tempered blade is difficult, and tempering after curving would require some pretty specialised equipment.
That said, the patent it as far as I can see long expired, so if someone has a machine shop and plenty of spare time it should be possible to adapt the basic idea to regular, flat DE blades.
Note: Remember to press "Publish", not just "Save" :(