Coating implements with material supply – Including ball – roller or endless-belt tool – Ball
Patent
1997-12-09
1999-05-04
Bratlie, Steven A.
Coating implements with material supply
Including ball, roller or endless-belt tool
Ball
401209, B43K 700, B43K 710
Patent
active
058996257
ABSTRACT:
A ballpoint pen tip including a metallic pipe having a plurality of inwardly projecting portions at a neighborhood of a front end portion of the pipe at regular intervals, and a front end edge portion at a front end of the pipe, and a ball rotatably held between the front end edge portion and the plurality of inwardly projecting portions, wherein the pipe satisfies a relation of A/T.ltoreq.5.8 where A is an outer diameter of the ball and T is a thickness 10 of the pipe, and also the relation of B/T.ltoreq.2.3 where B is a diameter of a virtual inscribing circle contacting a top of the plurality of inwardly projecting portions and T is the same as above.
REFERENCES:
patent: 2879586 (1959-03-01), Fehling et al.
patent: 4457644 (1984-07-01), Yokosuka
patent: 4789263 (1988-12-01), Germann
Ando Masashi
Asami Hideaki
Kondo Masahiro
Matsubara Nobuo
Sekine Nobuo
Bratlie Steven A.
The Pilot Ink Co., Ltd.
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