Metal tip for ball-point pen

Details Metal tip for ball-point pen Metal tip for ball-point pen

1995-12-15

1997-11-25

Yu, Mickey

Coating implements with material supply

Including ball, roller or endless-belt tool

Ball

B43K 710

Patent

active

056904428

ABSTRACT:
This invention provides a metal tip for a ball-point pen, having an ink guide hole (2) formed at the center of the bottom surface of a ball holding portion (1) and radial grooves (3) arranged around the ink guide hole. The ink guide hole has a diameter 30 to 55% the diameter of a ball and a length 1.2 to 2 times the diameter of the ink guide hole. A cleaning tool, used for removing a flash which is formed during formation of the radial grooves (3) by cutting (broaching) and which projects into the ink guide hole (2), is set to have a diameter 70 to 97% the diameter of the ink guide hole, so that only a base portion of the projecting flash is left.

REFERENCES:
patent: 3281933 (1966-11-01), Fehling et al.
patent: 3302279 (1967-02-01), Rosa
patent: 3463106 (1969-08-01), Azzariti
patent: 3502418 (1970-03-01), Payne
patent: 3781123 (1973-12-01), Linz et al.
patent: 5104249 (1992-04-01), Elsner et al.

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