Title:
AQUEOUS INK BALLPOINT PEN
Document Type and Number:
Japanese Patent JP3490323
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide an aqueous ink ballpoint pen capable of completely commonly using a marker and a cap and adapted to an assembly writing instrument or the like.
SOLUTION: In the aqueous ink ballpoint pen comprising a ballpoint pen refill 10 directly filled in an ink cylinder 11 with an aqueous ink L and mounted in a barrel 20, and a sealing member 5 made of a soft elastic material disposed in a cap 40 to seal a top of a tip 13 when the cap 40 is mounted at the barrel, gastight parts 22, 41 for gastightly sealing when the cap is mounted at the barrel are respectively formed on an inner periphery of a mating port of the cap and an outer periphery of the barrel, and an air inlet hole 23 and an air outlet hole 24 are respectively formed at front and rear sides of the gastight parts of the barrel.
Inventors:
Ryo Matsukawa
Application Number:
JP3098499A
Publication Date:
January 26, 2004
Filing Date:
February 09, 1999
Export Citation:
Assignee:
Sailor Pen Co., Ltd.
International Classes:
B43K23/08; B43K3/00; B43K7/00; (IPC1-7): B43K7/00; B43K3/00; B43K23/08
Domestic Patent References:
| JP671169U | ||||
| JP733681U | ||||
| JP723583U |
Attorney, Agent or Firm:
Toranosuke Tahara