Cross section of the Bacon & Donkin rotary press from their patent. In the upper part of the image you can see the way that the inventors placed the flat plates on a pentagonal surface.
Creative Commons LicenseJeremy Norman Collection of Images - Creative Commons

Cross section of the Bacon & Donkin rotary press from their patent. In the upper part of the image you can see the way that the inventors placed the flat plates on a pentagonal surface.

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