Abstract: A writing implement comprises a tubular barrel containing an ink, a writing ball fitted in a socket formed in the tip of the barrel, and an ink stirring member sealed in the barrel so as to be movable to stir the ink so that the precipitated components of the ink are dispersed when the barrel is shaken. A helical spring is disposed within the barrel at a position near the writing tip of the barrel so that the front end thereof is in contact with the writing ball to press the ball resiliently forward and the back end thereof can be struck by the stirring member. When the barrel is shaken so that the stirring member may apply shocks to the back end of the helical spring, the helical spring vibrates slightly and the slight vibrations of the helical spring disperse the precipitated components of the ink and secure smooth ink flow.

Abstract: A longer lifetime of a writing instrument having a fibrous writing tip is attained by replacement of a refill, which comprises a body and a wadding impregnated with an ink. The body has closed front and rear ends. The front end may be sealed with a thin sealing film. The body of the writing instrument comprises a pen barrel 1 having a hollow therein, and a writing tip having at its rear end a pointed member protruding therefrom. The refill is fitted into the hollow with the open end whose sealing sheet has been peeled off ahead or with the front end ahead, and is slid to a position where a second stopper abuts against the rear end of the pen barrel. At that time, the rear end of the writing tip is caused to enter the interior of the refill through its open end free from the sealing sheet. Alternatively, the front end of the refill is pierced by a pointed member to cause the rear end of the writing tip to plunge into the wadding.