Writing implement and a fabricating method thereof

A method for fabricating a writing implement comprising a cylindrical body for defining a liquid passage along which liquid to be applied flows, the liquid passage having:

• a chamber portion for holding a ball valve member loosely:
• and
• a sealing portion being operable to come to contact with the ball valve member entirely along a circumference of the ball valve member to interrupt the flow of liquid;
• the method comprising the steps of:
• adding inorganic matter to synthetic resin;
• and
• molding the synthetic resin into the cylindrical body.

A method for fabricating a writing implement comprising:

• a liquid passage along which liquid to be applied flows;
• valve means provided at a specified position of the liquid passage, the valve means including:
• a valve member in the form of a ball;
• a chamber portion in which the ball valve member is placed loosely;
• and
• a sealing portion being operable to come to contact with the ball valve member entirely along a circumference of the ball valve member to interrupt the flow of liquid;
• and
• a restricting portion being operable to come to contact with a circumferential portion of the ball valve member to restrict the movement of the ball valve member toward a leading end of the writing implement;
• the method comprising the steps of:
• forming a cylindrical body defining the liquid passage, the chamber portion, the sealing portion, and the restricting portion using elastically deformable material;
• attaching water-insoluble lubricant to a surface of the ball valve member, the water-insoluble lubricant being in solid phase at normal temperature;
• and
• inserting the ball valve member pressingly into the chamber portion through the restricting portion.