Date: September 18, 1883
Creator: Osborn, Adelbert E.
Description: Patent for a new and improved oil press mat. This design consists in "having its body portion composed of card-board cut to the size of the press-box, the adjacent faces being covered with sheet metal, which is pressed or stamped into the paper body to give the required cavity, which is bounded by raised margins and transverse ribs struck up from the metal, and supported by paper strips interposed between the layers of card-board, the two leaves of the mat having a leather backing and being hinged together" (lines 15-25).
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