Article: Massachusetts, North Carolina Inventors Develop Free Ink Roller Ball Pen

ALEXANDRIA, Va., Nov. 27 -- Sean A. Ferrigan of Gramby, Mass., Norman P. De Bastiani of South Hadley, Mass., and Wolfgang Witz of Wake Forest, N.C., have developed a free ink roller ball pen for dispensing low viscosity inks containing pigments that are prone to sedimentation.

According to the U.S. Patent & Trademark Office: "The instrument contains an ink reservoir chamber, a nib chamber provided with a roller ball socket assembly, a pressure equalization overflow chamber for the low viscosity ink, and a special agitation system for the ink reservoir and nib chamber."

An abstract of the invention, released by the Patent Office, said: "The agitation system comprises a weight, with a ...

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