National Museum of American History
Patent Model for Type Molds
Mason, Thomas · ca 1877
This patent model demonstrates an invention for a type mold; the invention was granted patent model 187880. The patent details type molds in which the jet of the newly cast type was broken off automatically as the mold was opened, saving a separate operation in the typecasting process. Mason was from Islington in Middlesex, England. His invention was patented in England in 1877.
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