Writing instrument

Claim 2

In a writing instrument including a hollow barrel provided with a forwardly facing stop shoulder and a forwardly extending generally conical writing portion on said barrel and a removable cap, the provision of: a forwardly extending latch collar provided with a forwardly and inwardly tapered forward edge carried by the writing point portion with said forward edge spaced rearwardly from the front of the writing point portion and radially outwardly from said writing point portion, said collar having a concaved outer surface rearwardly of its forward edge; and a removable cap for said writing point portion, said cap having a cylindrical wall portion with an open end, the end of said wall at such open end being adapted to seat on a forwardly facing stop shoulder on the barrel; the internal surface of said cylindrical wall portion of the cap including a plurality of inwardly extending angularly related dimples adapted to contact the concave surface of the collar when the end of the cap wall is seated on the stop shoulder.

Claim 3

A writing instrument as stated in claim 1 wherein the cap is provided with an integral clip bar extending beyond said open end of the cap into proximity with the barrel.

Claim 4

A writing instrument as stated in claim 1 wherein the cap has a closed end opposite said open end and a point-receiving bore extending into said closed end, said bore being of smaller diameter than said open end, and a thin-walled cylindrical sealing collar positioned within and unitary with the cap between said bore and open end, said sealing collar having a free end facing the open end and being free to adjustably position itself in sealing relation to the writing point portion of a writing instrument inserted into said cap.

Claim 5

A writing instrument as stated in claim 1, said cap being provided with a closed end opposite said open end and a point-receiving bore extending into said closed end, said bore being of smaller diameter than said open end.

Claim 6

In a writing instrument including a removable unitary cap and clip and a barrel, the provision of: said cap having a closed end and an open end, a bore extending into the closed end, said bore being of smaller diameter than the inner diameter of the open end; a thin-walled cylindrical sealing collar extension of said bore positioned within and unitary with the cap between said bore and open end, said sealing collar having a free end facing the open end and being free to accept and sealingly contact the outer surface of a writing point portion of a writing instrument inserted into said cap; a clip bar integral with said cap, said bar having a surface parallel to the bore axis of the cap but spaced therefrom and extending beyond said open end, said cap and clip bar being composed of an organic plastic whose resiliency is reflected and utilized in the clip bar; and said barrel having a forwardly facing stop shoulder and a forwardly extending generally conical writing portion, said writing portion integrally carrying a forwardly extending inwardly tapered latch collar having a forward edge spaced rearwardly from the front of the writing portion and radially outwardly from said writing portion, said cap including inwardly extending means adapted to contact said latch collar outer surface so as to retain said cap on said barrel when the end of the cap abuts saId barrel stop shoulder.

Claim 7

In a writing instrument including a removable unitary cap and clip and a barrel, the provision of: said cap having a closed end and an open end, a bore extending into the closed end, said bore being of smaller diameter than the inner diameter of the open end; a thin-walled cylindrical sealing collar extension of said bore positioned within and unitary with the cap between said bore and open end, said sealing collar having a free end facing the open end and being free to accept and sealingly contact the outer surface of a writing point portion of a writing instrument inserted into said cap; a clip bar integral with said cap, said bar having a surface parallel to the bore axis of the cap but spaced therefrom and extending beyond said open end, said cap and clip bar being composed of an organic plastic whose resiliency is reflected and utilized in the clip bar; and said barrel having a forwardly facing stop shoulder and a forwardly extending generally conical writing portion, said writing portion integrally carrying a forwardly extending inwardly tapered latch collar having a forward edge spaced rearwardly from the front of the writing portion and radially outwardly from said writing portion, said cap including inwardly extending means adapted to contact said latch collar outer surface so as to retain said cap on said barrel when the end of the cap abuts saId barrel stop shoulder.