Writing pen core having an integral nib and ink reservoir and me

Details Writing pen core having an integral nib and ink reservoir and me Writing pen core having an integral nib and ink reservoir and me

1976-07-02

1978-04-25

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

264 54, 264DIG5, 264DIG13, 264128, D04H 164

Patent

active

040863123

ABSTRACT:
A fiber bundle is first formed of entangled fibers by passing fibers through the tapered mole of an extruder, and then the fiber bundle is provided with at least one longitudinal groove which provides an air passage in the final product communication between the ink reservoir and the atmosphere. Subsequently, one end of the fiber bundle with the longitudinal groove is dipped into a liquid urethane prepolymer to form a nib portion by impregnating the dipped portion with the prepolymer. After removal from the liquid prepolymer it is left to stand. During this standing or setting period the reactions among the constituents of the prepolymer and the volatilization of solvent produce a set urethane nib portion having capillary passages therein, and an air passageway where the groove was formed. The fiber bundle thus produced which is called "core portion" of the pen, is machined at its impregnated end to form a nib. Thus, the product consists of a nib material portion and an ink reservoir integral therewith.

REFERENCES:
patent: 3400998 (1968-09-01), Daugherty et al.
patent: 3432446 (1969-03-01), Coppeta
patent: 3443984 (1969-05-01), Stewart
patent: 3461197 (1969-08-01), Lemelson
patent: 3502417 (1970-03-01), Hartmann
patent: 3558392 (1971-01-01), Goodenow et al.
patent: 3562374 (1971-02-01), Okamoto et al.
patent: 3715254 (1973-02-01), Tolgyesl
patent: 3767520 (1973-10-01), Dick et al.
patent: 3864183 (1975-02-01), Hori
patent: 3881828 (1975-05-01), Jones
patent: 3942903 (1976-03-01), Dickey et al.

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