Correction fluid pen
OwnerPran Batra, deceased, by Shanta Batra, legal representativeinventors
Life of this patent
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Abstract
A correction fluid pen for applying a correction fluid, the correction fluid being of the type containing an opaque covering pigment and a volatile solvent. The pen includes a barrel with a manually squeezable plastic wall portion and an applicator with a spring biased stylus. The squeezable plastic wall portions advantageously have a bellows structure to facilitate the manual squeezing operation. The stylus is positioned within an orifice assembly which includes an orifice for passing the correction fluid. A portion of the stylus is moveable toward an exit opening for the orifice assembly for metering correction fluid passing out of the orifice assembly.
Claims13
A correction fluid pen for applying a correction fluid of the type which includes an opaque covering pigment and a volatile solvent, the correction fluid pen comprising:
- a barrel having a substantially rectangular cross section and a fluid chamber with an open end for retaining a reservoir of fluid, the barrel, including opposite substantially flat side walls, opposite substantially flat end walls connected between said side walls, a shoulder closing one end of said barrel and a bottom wall closing an opposite end of said barrel, and a bellows structure bounding at least a major portion of each side wall, said barrel being made of plastic material and said side walls and bellows structure being manually squeezable inwardly into said fluid chamber, said barrel including a neck extending from said shoulder and having a bore therethrough communicating with said fluid chamber;
- a chlorinated-based solvent correction fluid contained in said fluid chamber;
- an applicator assembly connected to said neck and including a cavity extending therethrough, said applicator assembly including a funnel shaped portion, said cavity including a conical passage extending through said funnel shaped portion and terminating at a discharge opening at an end of said funnel-shaped portion;
- an orifice assembly seated between said neck and said applicator assembly in said bore of said neck and in said cavity of said applicator assembly, said orifice assembly, including a passage therethrough, communicating said fluid chamber with said conical passage;
- a solid, elongated stylus, slidably mounted in said applicator assembly, said stylus having a top engagable into said discharge opening for closing said discharge opening and being retractable into said conical passage to define an annular space between said tip and said discharge opening for the discharge of correction fluid through said annular space, said stylus including a cylindrical portion connected to said tip and defining an annular passage with said funnel-shaped portion of said applicator assembly in said conical passage;
- spring means engaged with said stylus for urging said stylus into engagement with the applicator assembly to close said discharge opening against a discharge of fluid;
- and
- a boss extending from said orifice assembly toward said discharge opening, said spring means comprising a spring having one end engaged around at least a portion of said boss, said boss having an orifice therethrough communicating with said passage in said orifice assembly, said stylus having a conical portion with a small diameter end connected to said cylindrical portion of said stylus, and a large diameter end, at least one spring stop projection on said conical portion of said stylus adjacent said large diameter end thereof, said spring having an opposite end engaged around said large diameter end of the conical portion of said stylus, said stylus including a cylindrical stem extending from said large diameter end of said conical portion of said stylus, at least a portion of said stem extending into said orifice for metering a flow of correction fluid through said orifice.
Dependencies are inferred from the claim text.