Ball-point pen

Details Ball-point pen Ball-point pen

1997-05-28

1999-03-02

Walczak, David J.

Coating implements with material supply

Including ball, roller or endless-belt tool

Ball

401214, 401216, B43K 700

Patent

active

058761420

ABSTRACT:
Press forming for preventing the ball from slipping out from the pen tip of a ball-point pen is carried out twice creating a sealing face brim having a width S and a curvature R substantially equal to that of the ball, inside the front part of the pen tip. Provided in the rear of the ball is a ball seat, and channels and longitudinal backlash which allow the ink to flow to the pen point are provided. Further, the front part of the point assembly may be formed with an open V-shaped tapered portion. A spring which constantly urges the ball forward may be provided inside the point assembly.

REFERENCES:
patent: 3216399 (1965-11-01), Sams
patent: 4671691 (1987-06-01), Case et al.
patent: 4722124 (1988-02-01), Serikawa et al.
patent: 5421664 (1995-06-01), Okamoto
patent: 5520473 (1996-05-01), Durham

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