Patent ID: 6860666
Filing Date: 2005-03-01
Classification: B43K

Abstract:
1. A pen comprising: an elongated, hollow bar including a plurality of cartridges matingly cascaded together along a bore thereof, each cartridge having a projected stick adapted to insert into a top end of another cartridge and the stick of each cartridge having a color different that of others, two opposite protrusions disposed on an inner surface adjacent a bottom end of the bar, the protrusions being adapted to fasten one of a plurality of recessed portions of the cartridge in a lowest position of the bar, and two opposite recesses disposed at the bottom end of the bar; and a cap releasably covered on the bottom end of the bar; whereby either removing the lowest cartridge and inserting the cartridge into a top end of the bar will push the lowest cartridge out of the bar or engaging the lowest cartridge with another cartridge prior to pushing upwardly will remove the topmost cartridge from the bar.