Patent ID: 6464420
Filing Date: 2002-10-15
Classification: B43K

Abstract:
A liquid ink pen which comprises,(a) an elongated pen body having a hollow interior portion and an open lower end, (b) said pen body containing a reservoir for liquid ink communicating with said open end, (c) a nib mounted adjacent the open end of said pen body and extending a distance therefrom, (d) said nib mounting a writing tip at a lower end thereof, (e) a capillary element communicating with said reservoir and having passage forming elements for the flow of writing ink from said reservoir to said writing tip and having capillary passages to accommodate the flow of breathing air to and from said reservoir, and (f) a color coded sleeve surrounding said nib, (g) an internal passage for beathing air formed by one or both of said sleeve and nib, (h) said internal passage communicating at one end with said capillary passages and communicating at an outlet end with the atmosphere, (i) said outlet end of said internal passage being located adjacent a lower end extremity of said sleeve, closely adjacent said writing tip.