Applicator tip assembly for a pen-like instrument

An applicator tip assembly for use in a pen-like instrument, said tip assembly comprising:

• a body having an inlet end and an outlet end, having a through opening with an inlet in said inlet end, and an outlet in said outlet end;
• an applicator member within said through opening having a surface shaped to make sealing engagement against said body at said outlet end and being shaped to project through said outlet and past the outlet end of said body when said applicator member is in engagement with said body;
• and
• spring means for biasing said applicator member against the outlet end of said body, wherein said through opening in said body is partially defined by longitudinally extending radially inwardly projecting spaced fins, and said spring means comprises an elongate coil spring having a compressible portion between and guided for longitudinal movement by said fins adjacent said applicator member, and an anchor portion at the end of said compressible portion opposite said applicator member in firm engagement with the inner edges of said fins, portions of said through opening defined between said fins affording easy passage of fluid around said spring in said through opening.