Title:
BALL-POINT PEN REFILL AND METHOD OF MANUFACTURING THE SAME
Document Type and Number:
WIPO Patent Application WO/1997/022483
Kind Code:
A1
Abstract:
A ball-point pen refill which can be applied to a knock type ball-point pen portable with the tip facing down. The refill provides clear handwriting and a smooth feeling of writing, and is free from leakage of ink from the tip and has no possibility that the ball comes off even if a shock is applied thereto. Received in an ink-containing cylinder (1) composed of a tip holder member (9) and an ink-containing member (10) are ink (2) to which a shear reducing viscosity is imparted, and an ink follower (3) which is disposed at the back of the ink. Fitted into a tip hole (9a) of the tip holder member (9) is a ball-point pen tip (4) which holds a ball (6) and in which an inner wall surface (4f) of a caulked portion at a tip edge (4b) is formed into the same spherical shape as that of the ball, and a coil spring (7) is provided which constantly presses the ball against the inner wall surface of the caulked portion through a movable member (8). A tail plug (5) provided with ventilating means is fitted into the rear end of the ink containing cylinder (1). Formed on a portion (9d), at which the tip holder member (9) is fitted into the ink containing member (10), is a partition (9g) which includes an ink flow passage serving to regulate the amount of flow of ink and a rear end surface (9c).
Inventors:
SHIOBARA TOSHIKAZU (JP)
SASAKI KAZUHIKO (JP)
FUKASAWA TERUAKI (JP)
SASAKI KAZUHIKO (JP)
FUKASAWA TERUAKI (JP)
Application Number:
PCT/JP1996/003619
Publication Date:
June 26, 1997
Filing Date:
December 11, 1996
Export Citation:
Assignee:
PILOT KK (JP)
SHIOBARA TOSHIKAZU (JP)
SASAKI KAZUHIKO (JP)
FUKASAWA TERUAKI (JP)
SHIOBARA TOSHIKAZU (JP)
SASAKI KAZUHIKO (JP)
FUKASAWA TERUAKI (JP)
International Classes:
B21D53/76; B43K1/08; B43K7/02; B43K7/08; B43K8/02; B43K23/12; (IPC1-7): B43K7/02; B43K7/08; B43K1/08; B21D39/00
Foreign References:
| JPH0683380U | 1994-11-29 | |||
| JPH07237386A | 1995-09-12 | |||
| JPH07237387A | 1995-09-12 | |||
| JPH07237388A | 1995-09-12 | |||
| JPH08258479A | 1996-10-08 | |||
| JPS63252799A | 1988-10-19 | |||
| JPS63183896A | 1988-07-29 | |||
| JPH0839982A | 1996-02-13 |
Other References:
See also references of EP 0810103A4
Download PDF: