Ballpoint pen tip, ballpoint pen utilizing the ballpoint pen...

Details Ballpoint pen tip, ballpoint pen utilizing the ballpoint pen... Ballpoint pen tip, ballpoint pen utilizing the ballpoint pen...

2005-05-03

2005-05-03

Huson, Gregory L. (Department: 3751)

Coating implements with material supply

Including ball, roller or endless-belt tool

With flow-regulator

C401S209000, C401S212000, C401S216000

Reexamination Certificate

active

06887008

ABSTRACT:
There is provided a ballpoint pen tip that minimizes thin spots such as impact thin spots even if upward writing or an impact causes entry of air, allows rapid return to normal writing, and minimizes manufacturing costs. A writing ball and a check ball included in the ballpoint pen tip are placed close to each other with a slight clearance therebetween to leave an inner space with a slight capacity. Thus, even if air enters from a caulking portion, the volume of the air stored inside is slight, and an air pool can be rapidly eliminated. Further, both the writing ball and the check ball can be provided in a front end of the ballpoint pen tip, and assembly operations can be easily performed without inverting the ballpoint pen tip.

REFERENCES:
patent: 538492 (1895-04-01), Askew
patent: 2208588 (1940-07-01), LaForest
patent: 5957609 (1999-09-01), Morita et al.
patent: 6357948 (2002-03-01), Jung et al.
patent: 57-4373 (1982-01-01), None
patent: 10-236063 (1998-09-01), None

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