Method of manufacturing fibrous nib for use in a marker pen
AssigneeSpartan Felt Company, Inc.
InventorRobert J. Rossi
Life of this patent
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Abstract
A marker pen including an improved nib. The nib has an elongated body portion and an integral tip portion. The nib is constructed of a needled nonwoven material preferably impregnated with a thermoset resin, such as melamine. The nib member may have a specific gravity generally falling within a range of 0.34 through 0.80, with a specific gravity of 0.38 being preferred in one construction. The needled nonwoven material preferably contains needle tracks characteristic of inefficient needling. A method of producing the improved nib member is also disclosed.
Claims5
A method of manufacturing articles of manufacture suitable for use as a nib of a marking pen, said method comprising the steps of:
- a) providing a needled nonwoven substrate of synthetic fibers, said substrate having a weight of greater than approximately 3.2 ounces per square yard per millimeter of width, said substrate having been needled with needles greater than 20 gauge to define needle tracks therein, said needles having 2 or less barbs;
- b) impregnating said needled nonwoven substrate with a stiffening resin solution;
- c) curing said needled nonwoven substrate to produce a stiffened substrate material;
- and
- d) shaping portions of said stiffened substrate material in a grinding process to produce a nib member having a cylindrical body portion and an integral tip portion, said cylindrical body portion having a diameter of no greater than approximately 20 millimeters.
Dependencies are inferred from the claim text.