Advertising writing instrument

An advertising pen means comprising a pen having:

• a pen barrel having a hollow cylindrical hole formed in an upper portion of the barrel and a longitudinal slit formed in the barrel as downwardly notched from a top opening of said barrel, an axle tube fixed inside said barrel, a central stick selected from a pencil lead of a pencil or an inner ink reservoir of a ball pen replaceably mounted in said axle tube, a reel pole rotatably mounted on said axle tube and slidably reciprocated along the tube inside the barrel, a display sheet selected from a flag cloth, an advertising paper and a display cloth operatively wound on the reel pole through said longitudinal slit in said barrel, a clip formed on an upper portion of said barrel and a lower cap covering a nib of said pen;
• said longitudinal slit having a length larger than a height of said display sheet;
• said reel pole having a top knob formed on a top end of said pole rotatably engaged with a top opening of said barrel and having a lower plug formed on a lower end of said pole engageable with a bottom of said cylindrical hole of said barrel;
• the improvement which comprises:
• said lower plug having an annular hook portion formed between said reel pole and said axle tube, and said axle tube having an extension formed on a top end of said tube, whereby upon an upward extending of said pole to protrude said display sheet beyond said barrel, said lower plug of said pole is limited by said extension of said tube;
• and said longitudinal slit having a trumpet port diverging upwardly and outwardly from a top opening of said slit, adapted for a retraction of said display sheet into said barrel through said port and said slit.