Title:
WRITING INSTRUMENT
Document Type and Number:
WIPO Patent Application WO/1999/061258
Kind Code:
A1
Abstract:
A writing instrument (A) having an ink tank portion (31) for storing ink (11) therein, characterized in that the ink (11) in the ink tank portion (31) comprises an ink component (12), and a layer separation component (13) separated in the form of layer from the ink component (12), both the specific gravity and surface tension of the layer separation component (13) being lower than those of the ink component (12), the ink (11) being able to move freely in the interior of the ink tank portion (31). Owing to these characteristics, a writing instrument and a liquid application device in which a remaining amount of the ink can be visually recognized are provided.
Inventors:
KOYAMA TAKAO (JP)
Application Number:
PCT/JP1999/002804
Publication Date:
December 02, 1999
Filing Date:
May 27, 1999
Export Citation:
Assignee:
MITSUBISHI PENCIL CO (JP)
KOYAMA TAKAO (JP)
KOYAMA TAKAO (JP)
International Classes:
B43K5/12; B43K7/02; B43K8/00; (IPC1-7): B43K8/03; B43K5/02; B43K7/02
Foreign References:
| JPS58120085U | 1983-08-16 | |||
| JPS60166585U | 1985-11-05 | |||
| JPS57154019U | 1982-09-28 |
Other References:
See also references of EP 1093936A4
Attorney, Agent or Firm:
Fujimoto, Eisuke (3rd floor Room 317 14-2, Nagata-cho 2-chome Chiyoda-ku Tokyo, JP)
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