Ballpoint pen cartridge

Coating implements with material supply – Including means to apply material-moving force – Including pressurized reservoir

Patent

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Details

B43K 708

Patent

active

039972739

ABSTRACT:
A ball point pen cartridge comprising an elongated tube having one end open, a socket mounted in the other, a ball rotatably mounted in the socket, a marking fluid within the tube in contact with the ball and means for hermetically sealing the other end of the tube with a hydraulic seal while exerting pressure on the fluid.

REFERENCES:
patent: 3282255 (1966-11-01), Killen
patent: 3425779 (1969-02-01), Fisher et al.
patent: 3775015 (1973-11-01), Tsunoda et al.

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