Patent ID: 6599046
Filing Date: 2003-07-29
Classification: B43K

Abstract:
A direct liquid type writing instrument comprising:an ink reservoir including a main ink reservoir containing ink, a pen core chamber, and a sub ink reservoir which is provided between said main ink reservoir and said pen core chamber and communicates with said main ink reservoir via a small hole; a junction core disposed in said pen core chamber and extending on a center axis; a pen body provided integrally with a tip end side of said junction core or separately so as to be in contact with the tip end of said junction core; an opening/closing valve provided between said sub ink reservoir and said pen core chamber to normally isolate said pen core chamber from said sub ink reservoir and to be operated so that said pen core chamber communicates with said sub ink reservoir when said pen body is operated; an ink absorption body capable of absorbing ink, provided in said pen core chamber; and an ink suction body provided in said sub ink reservoir for moving into said small hole in association with an operation of said opening/closing valve.