Roller ball pen for pigmented inks

A free ink roller ball pen for dispensing low viscosity inks containing pigments that are prone to sedimentation. 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 spe...

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Bibliographic Details
Main Authors DE BASTIANI NORMAN P, WITZ WOLFGANG, FERRIGAN SEAN A
Format Patent
LanguageEnglish
Published 02.05.2006
Subjects
BRUSHES
BRUSHWARE
BUREAU ACCESSORIES
HUMAN NECESSITIES
IMPLEMENTS FOR WRITING OR DRAWING
PERFORMING OPERATIONS
TRANSPORTING
WRITING OR DRAWING IMPLEMENTS
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Summary:A free ink roller ball pen for dispensing low viscosity inks containing pigments that are prone to sedimentation. 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. The agitation system comprises a weight, with a cross section smaller than the interior of the nib chamber, connected to a wire having a diameter smaller than the back inner diameter of the ball socket assembly. The length of the weight and its confinement are selected to provide for a predetermined stroke, on shaking the pen, that sweeps out the internal space of the nib and also the back of the roller ball assembly, to re-disperse any pigment that has precipitated.
Bibliography:Application Number: US20050191427