Ink composition for pressurized ball-point pen and...

Details Ink composition for pressurized ball-point pen and... Ink composition for pressurized ball-point pen and...

2007-12-04

2007-12-04

Walczak, David J. (Department: 3751)

Coating implements with material supply

Including means to apply material-moving force

Including pressurized reservoir

C401S209000, C106S031130

Reexamination Certificate

active

10514486

ABSTRACT:
An ink composition for a pressurized ballpoint pen and a pressurized ballpoint pen which can exhibit excellent writing properties, do not cause ink leakage and which are suited to handwriting. The ink composition for a pressurized ballpoint pen includes at least a colorant, a solvent and silica, wherein a coagulated matter containing at least the silica is contained therein, and the ink composition has a viscosity of 10000 to 40000 mPa·s at 25° C. A pressurized ballpoint pen equipped with a refill, in which pressurized gas is charged into an ink reservoir charged with the ink composition for a pressurized ballpoint pen and a closed vessel containing the reservoir is also set forth.

REFERENCES:
patent: 3659951 (1972-05-01), Germann
patent: 4419464 (1983-12-01), Williams et al.
patent: 4789399 (1988-12-01), Williams et al.
patent: 47-48565 (1972-12-01), None
patent: 50-96336 (1975-07-01), None
patent: 60-186574 (1985-09-01), None
patent: 62-7775 (1987-01-01), None
patent: 10-195365 (1998-07-01), None

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