Nonoxide ceramic ball-point pen ball

Details Nonoxide ceramic ball-point pen ball Nonoxide ceramic ball-point pen ball

1985-09-06

1987-03-31

Apley, Richard J.

Coating implements with material supply

Including ball, roller or endless-belt tool

Ball

401209, B43K 700

Patent

active

046539506

ABSTRACT:
This invention relates to a ball-point pen ball made of nonoxide ceramic and formed into a spherical body whose surface contains voids each having an average pore diameter of less than 75 .mu.m and more than 0.1 .mu.m. The ball thus made is not only almost free from "ball sunk", "nonuniformity in writing line thickness", "ball break", etc. but also excellent in affinity with ink and assures steady writing characteristic over a long period of time.

REFERENCES:
patent: 2847751 (1958-08-01), Reed
patent: 3303825 (1967-02-01), Shuman et al.
patent: 3520630 (1970-07-01), Gordon et al.
patent: 3666411 (1972-05-01), Collier
patent: 3746456 (1973-07-01), Hill
patent: 3960581 (1976-06-01), Cutler
"Hackh's Chem. Dic."; Grant, 1969 p. 611.

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