Writing instrument tip
AssigneeThe Gillette Company
InventorsHugh W. B. Baker, Graham J. Whiting
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Abstract
A writing tip or nib for a reservoir pen is provided comprising a thin-walled hollow element (10), e.g. of metal, having an outwardly convex end wall portion (12) defining the writing surface of the tip, and several perforations (13) extending through the end wall portion for conducting ink directly to the writing surface from inside the tip. The perforations may be at least 8 in number and measure 50-200 microns across. The outer edges of the perforations are smoothly rounded at the writing surface and the perforations taper gradually inwardly from the writing surface.
Claims15
A writing tip for a reservoir pen comprising a hollow, rigid, thin-walled element including a convex wall portion defining an external writing surface carrying more than eight substantially circular or elliptical perforations for conducting ink directly to the writing surface from the interior of the writing tip, said perforations having diameters between about 60 to about 80 microns and having transverse dimensions in the range of 50 to 200 microns and tapering smoothly inwardly from the writing surface and where the edges at the outer ends of the perforations are smoothly radiussed to thereby preclude snagging at the writing surface.
Dependencies are inferred from the claim text.