WRITING UTENSIL - MITSUBISHI PENCIL CO

Title:

WRITING UTENSIL

Document Type and Number:

WIPO Patent Application WO/2003/095231

Kind Code:

A1

Abstract:

A writing utensil in which writing ink, such as water-based ink or oil-based ink, with which an ink occluding body in the barrel is impregnated is supplied to the pen point, which is to become the writing section, the utensil being designed so that an ink exhaustion signal can be easily and reliably detected visually. This writing utensil, in which ink with which an ink occluding body in the barrel is impregnated is supplied to the pen point, which is to become the writing section, is arranged such that the ink with which the ink occluding body is impregnated is supplied to the pen point through a visually discernible ink guide tube and such that an ink exhaustion signal from the ink occluding body is detected by visually discerning the ink guide tube through a visually discernable section formed in the barrel.

Inventors:

KOYAMA TAKAO (JP)

Application Number:

PCT/JP2003/005952

Publication Date:

November 20, 2003

Filing Date:

May 13, 2003

Export Citation:

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Assignee:

MITSUBISHI PENCIL CO (JP)
KOYAMA TAKAO (JP)

International Classes:

B43K7/06; B43K7/08; B43K7/10; B43K8/04; B43K27/08; (IPC1-7): B43K8/04; B43K5/12; B43K5/18; B43K7/06; B43K7/10

Foreign References:

JPS576581U	1982-01-13
JPS58138699A	1983-08-17
JPS5912684U	1984-01-26
JPS56128283U	1981-09-29
GB2114065A	1983-08-17
EP1095791A1	2001-05-02
US20010012468A1	2001-08-09
EP1238822A1	2002-09-11
DE1067706B	1959-10-22
DE1075982B	1960-02-18
EP0801119A1	1997-10-15
US5013361A	1991-05-07

Other References: