Ball of a pen tip

Details Ball of a pen tip Ball of a pen tip

2005-05-25

2008-12-16

Walczak, David J (Department: 3751)

Coating implements with material supply

Including ball, roller or endless-belt tool

Ball

C401S216000

Reexamination Certificate

active

07465117

ABSTRACT:
A ball is from D 700×10−6m to 2500×10−6m in diameter and has at least one sign engraved in the surface. The sign is constituted by a system of engraved individual cells situated on the surface of a spherical cap of the ball with a base having a circumference OD in the range from 10×10−6m to 0.5 n D and the diameter Dc of the circle circumscribing the plan view shape of the cell is in the range from 10×10−6m to 1/7 D, whereby the depth of the cell is in the range from 5×10−6m to 2×Dc.

REFERENCES:
patent: 2992904 (1961-07-01), Morel et al.
patent: 3166050 (1965-01-01), Harvey et al.
patent: 6332728 (2001-12-01), Ito et al.
patent: 6375707 (2002-04-01), O'Donnell et al.

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