[54] WRITING INSTRUMENT
[75] Inventors: Takashi Tamura; Masamitsu
Nagahama; Koichi Enuma; Yoshihiro
Wada; Masayuki Kawasaki; Kazuo
Sakai; Kazunori Suzuki, all of
Saitama, Japan
[73] Assignee: Pentel, Kabushiki Kaisha,
Nihonbashi, Japan
[21] Appl. No.: 678,322
[22] PCT Filed: Sep. 27,1990
[86] PCT No.: PCT/JP90/01239
§ 371 Date: Apr. 30, 1991
§ 102(e) Date: Apr. 30,1991
[87] PCT Pub. No.: WO91/04873
PCT Pub. Date: Apr. 18, 1991
[30] Foreign Application Priority Data
Sep. 29, 1989 [JP] Japan 1-115051[U]
Sep. 30, 1989 [JP] Japan 1-115437[U]
Nov. 30, 1989 [JP] Japan 1-139439[U]
Dec. 27, 1989 [JP] Japan 1-152382[U]
Apr. 28, 1990 [JP] Japan ., 2-45989[U]
[51] Int. CI.5 B43K 5/02; B43K 3/00;
B43K 1/12; G01D 15/16
[52] U.S. CI 401/48; 401/227;
401/198; 401/251; 401/258; 346/140 A
[58] Field of Search 401/198, 131, 48, 225,
401/227, 228, 229, 251, 243, 192, 205, 206, 219, 199, 202, 223, 258; 346/140 R, 140 A
[56] References Cited
U.S. PATENT DOCUMENTS
2,303,373 12/1942 Martin 401/227 X
3,532,436 10/1970 Konig 401/227
4,139,313 2/1979 Hon 401/216
4,269,529 5/1981 McCollough 401/48 X
4,410,290 10/1983 Ito et al 401/198
4,761,090 8/1988 Goh 401/198 X
4,823,148 4/1989 Sieber et al 401/48 X
4,928,121 5/1990 Raahauge 401/131 X
4,954,002 9/1990 Wallis et al 401/224 X
Primary Examiner—Danton D. DeMille
Attorney, Agent, or Firm—Wenderoth, Lind & Ponack
[57] ABSTRACT
This invention relates to a writing instrument wherein a temporary ink storage member made of a synthetic resin injection molded article is sandwiched between a pen tip and an ink tank. In the present invention, a flange portion for fitting to a predetermined apparatus, which is positioned around an outer peripheral portion of the temporary ink storage member, is formed integrally with a shaft made of a synthetic resin injection molded article. In embodiments of the invention, the temporary ink storage member is made flexible, the shaft is made of a material which is softer than that of the tip holder, and the tip holder is used as a writing thickness display member. The temporary ink storage member can be used as an ink color display member and a cap is used as an application display member. In other embodiment, the cap can be fitted selectively in accordance with types of writing instruments.
4 Claims, 18 Drawing Sheets
