Zirconia pen balls
AssigneeCorning Glass Works
InventorsJohn N. Hansson, Herbert L. Johns
Life of this patent
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Abstract
A liquid transfer ball formed from sintered zirconium oxide particles which exhibits utility as the ball element of a ball pen writing instrument to transfer ink from an ink reservoir to a writing surface such as paper. The ball exhibits a porosity of less than 8% by volume and is immune to corrosive action of inks.
Claims9
A liquid transfer device including a hollow tip, adapted to be placed in communication with a liquid container, and a liquid transfer ball seated in said hollow tip in protruding relation, said liquid transfer ball formed of a ceramic comprising zirconium oxide as the major analytic constituent of the ceramic and being at least partially stabilized by a stabilizer, and said ball having a porosity of less than about 8 percent by volume as determined by optical image analysis of a polished section.
Dependencies are inferred from the claim text.