Writing instrument

Details Writing instrument Writing instrument

1998-06-26

1999-08-31

Walczak, David J.

Coating implements with material supply

Bifurcate pointed nib tool

Including reservoir and feeder

401225, B43K 518

Patent

active

059444380

ABSTRACT:
A free ink type writing instrument using an ink containing an organic solvent as a main solvent, wherein a temporary ink reservoir member has a larger critical surface tension than a surface tension of the ink, and an absolute value of a difference between values of solubility parameters of a material constituting the temporary ink reservoir member and a solvent contained in the ink is 1 or more.

REFERENCES:
patent: 4095907 (1978-06-01), Kuparinen
patent: 4207012 (1980-06-01), Kuparinen
patent: 4556336 (1985-12-01), Sano et al.
patent: 4712937 (1987-12-01), Schmidt et al.
patent: 4968169 (1990-11-01), Yokosuka et al.

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