The Gillette Company

Henry Peper

Rachel M Loftin

Chandrasen Gajria

Laura K Case

Edward J Ferguson

Laura K Case, Deceased

Thomas E Eaton

Aqueous based shear-thinning ink compositions and ball-point pens including the ink compositions. The ink compositions have a shear thinning index of from about 0.01 to about 0.6 and include colorant material(s) and a water dispersible, polymeric shear-thinning material substantially uniformly dispersed in a highly polar solvent system in which water is the primary solvent for the shear-thinning material.

Ball-point writing instrument containing an aqueous ink composition

Gelled, aqueous inks are used in conjunction with viscoelastic ink follower compositions to avoid the necessity of using a fibrous ink reservoir or a porous or extruded ink feed rod.

A writing instrument cartridge contains a loose fitting ball follower disposed within the cartridge between an end of a column of paste like ink exhibiting a yield value, and compressed gas contained in a sealed end of the cartridge. The ball follower is adapted to help peel the ink from the tube walls without contact and to prevent the gas from channeling through the ink and escaping from the cartridge past a ball point or nib during writing.

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Marblehead, MA, United States of America

Henry Peper