Global Patent Index - EP 1074402 A1

EP 1074402 A1 2001-02-07 - METHOD OF MANUFACTURING A PIPE TYPE BALL-POINT PEN TIP

Title (en)

METHOD OF MANUFACTURING A PIPE TYPE BALL-POINT PEN TIP

Title (de)

VERFAHREN ZUM HERSTELLEN VON RöHRCHENKUGELSCHREIBERSPITZEN

Title (fr)

PROCEDE DE FABRICATION D'UNE POINTE TUBULAIRE DE CRAYON A BILLE

Publication

EP 1074402 A1 (EN)

Application

EP 00903964 A

Priority

  • JP 0000849 W
  • JP 4092499 A

Abstract (en)

A method of manufacturing a tubular ballpoint pen tip (10) with not only a ball seat but also an ink hole (40) of constant sizes by cutting is provided. The inner wall of a steel tube (11) is cut in the same diameter as the finishing diameter (D1) of the ink hole (40) in order to eliminate the variations of the ink hole (40) caused by an error of the steel tube (11). Then, channels (50) are bored and the ink hole (40) is cut with a drill with a caliber (D2) slightly shorter than the above-mentioned finishing diameter (D1). In this way, burrs (51) produced by the boring of the channels (50) is removed. <IMAGE> <IMAGE> <IMAGE>

IPC 1-7 (main, further and additional classification)

B43K 1/08

IPC 8 full level (invention and additional information)

B43K 1/08 (2006.01)

CPC (invention and additional information)

B43K 1/08 (2013.01)

Citation (search report)

See references of WO 0048846A1

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

WO 0048846 A1 20000824; EP 1074402 A1 20010207

INPADOC legal status


2006-03-29 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20050901

2001-02-07 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20001017

2001-02-07 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE