Point assembly of a ball-point pen

Details Point assembly of a ball-point pen Point assembly of a ball-point pen

1998-02-17

2000-12-19

Recla, Henry J.

Coating implements with material supply

Including ball, roller or endless-belt tool

Ball

401216, B43K 700, B43K 703, B43K 710

Patent

active

061619779

ABSTRACT:
A point assembly has a multiple number of channels on its inside for establishing commutation of ink to the pen point, and the extradius of these channels is set approximately equal to or greater than the radius of the ball. Further, the point assembly has a sealing face having a curvature R which is approximately equal to that of the ball, and has a ball seat, on the rear side of the ball, having a curvature R being approximately equal to that of the ball. The surface roughness of these elements is set 5 .mu.m or below. Further, this point assembly can be formed in an open V-shaped tapered configuration. Alternatively, the point assembly can be configured in combination with a spring provided therein which continuously urges the ball forwards or in combiation with an anti-backward leakage mechanism.

REFERENCES:
patent: 3966336 (1976-06-01), Lotfallah
patent: 5062890 (1991-11-01), Miyashita et al.
patent: 5520473 (1996-05-01), Durham
patent: 5762434 (1998-06-01), Nagashima et al.
patent: 5899618 (1999-05-01), Kobayashi et al.

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