Patent ID: 6575650
Filing Date: 2003-06-10
Classification: B43K

Abstract:
A pressure-sensed ink-filled pen at least comprising:a cylindrical pen tube having a hollow interior portion for storing liquid ink, a stopping piece being joined in a selected area at the front end of said pen tube, an ink outlet being formed at the center of said stopping piece, a valve being an U-shape round mask made of a relatively softer plastic material, an axial via hole is formed at the center of said U-shape round mask, a tapered toggle being formed surrounding the inner end side of said axial via hole, a filler seat being a tapered hollow cylinder, and a filler embedding hole is formed at the center of the front end of said filler seat and extends into the interior of said filler seat, an ink guide hole is formed at the bottom of said filler embedding hole, a top post is received at the rear end of said filler seat, ring-shape steps are formed at the base of said top post, radial ink inlets are formed around said top post, and a filler capable of absorbing liquid ink for carrying out writing; wherein said U-shape valve is embedded at said front end of said pen tube for covering said front end of said stopping piece, said rear end of said filler is embedded within said filler inserting hole of said filler seat, said front end of said filler seat is embedded at said front end of said tube for accommodating a longitudinal movement pushing said top post at said rear end of said filler seat to insert into said via hole on said valve, said via hole of said valve and said tapered toggle are used to tightly block said ink inlets surrounding said top post, movement causing said top post at said rear end of said filler seat to lift against or depart from a depressed portion enables said tightly sealed valve to open for a inflow of liquid ink.