Ball tip for a writing instrument and method for making same

Details Ball tip for a writing instrument and method for making same Ball tip for a writing instrument and method for making same

2005-12-06

2005-12-06

Walczak, David J. (Department: 3751)

Coating implements with material supply

Including ball, roller or endless-belt tool

Ball

C401S209000

Reexamination Certificate

active

06971814

ABSTRACT:
The ball point comprises a body having a front surface and a housing emerging in an opening in the front surface and communicating with a passage supplying a fluid. A ball can rotate freely in the housing. The body front surface has a peripheral portion parallel to the median plane of the opening and a flared portion adjacent to the opening periphery which forms at the point of contact of the ball with the opening periphery an acute angle (alpha) with the emerging part of the plane tangent to the ball at the contact point.

REFERENCES:
patent: 2573691 (1951-11-01), Chester
patent: 3000090 (1961-09-01), Fehling
patent: 3380152 (1968-04-01), Wilcox
patent: 3605246 (1971-09-01), Regnault
patent: 6082920 (2000-07-01), Furukawa
patent: 1201888 (1958-08-01), None
patent: 1576412 (1969-06-01), None
patent: 2368372 (1978-05-01), None
patent: 624366 (1946-07-01), None
patent: WO 00/69653 (2000-11-01), None

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