Topic: Pens, Pencils
TWO-YEAR INK SUPPLY can be carried in a fountain pen invented by L. J. Biro, an Argentine newspaper man from Hungary. The writing point is an unbreakable ball bearing to which a gelatinous quick-drying ink is fed from a copper tube. Composition of the ink is not divulged, but is supposedly a combination of glycerin and anilin fed from two copper tubes. The pen is sealed and can be refilled only by the manufacturer. The inventor claims the pen will not leak at high altitudes, and that one filling lasts one to two years.
Popular Science 1-1945 large scan (via Modern Mechanix)