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Patent Model of a Metallograph, or Embossing Pen for Autographic Printing
From the collection of National Museum of American History. Free to download, adapt and use — no permission needed.
About this work
This patent model demonstrates an invention for a metallograph, and was granted patent number 215792. With this tool, a writer could turn a sheet of metal into a printing plate as he wrote on it. The air-powered writing instrument made a series of sharp blows to the metal, knocking out projections on the back of the sheet. The projections formed a facsimile of the writing in reverse and in relief for printing at a type press.
National Museum of American History’s own descriptionSubjects
Credit linePatent Model of a Metallograph, or Embossing Pen for Autographic Printing. ca 1879. Setchell, George C.. National Museum of American History. CC0.
