(19)
(11) EP 1 095 792 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
04.06.2003 Bulletin 2003/23

(43) Date of publication A2:
02.05.2001 Bulletin 2001/18

(21) Application number: 00122336.1

(22) Date of filing: 23.10.2000
(51) International Patent Classification (IPC)7: B43K 8/02, B41J 27/20, B41J 2/175
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 29.10.1999 JP 30927199
30.11.1999 JP 34146999
27.12.1999 JP 36889099
28.01.2000 JP 2000020946
19.04.2000 JP 2000118705
31.07.2000 JP 2000230110

(71) Applicant: Pentel Kabushiki Kaisha
Chuo-ku, Tokyo (JP)

(72) Inventors:
  • Shimizu, Tsutomu
    Chuo-ku, Tokyo (JP)
  • Enuma, Kouichi
    Chuo-ku, Tokyo (JP)
  • Tamai, Jun
    Chuo-ku, Tokyo (JP)
  • Kato, Yasuo
    Chuo-ku, Tokyo (JP)
  • Tazunoki, Hiroshi
    Chuo-ku, Tokyo (JP)
  • Toyama, Takeshi
    Chuo-ku, Tokyo (JP)
  • Kawasaki, Masayuki
    Chuo-ku, Tokyo (JP)
  • Nagahama, Masamitsu
    Chuo-ku, Tokyo (JP)

(74) Representative: Klingseisen, Franz, Dipl.-Ing. et al
Patentanwälte, Dr. F. Zumstein, Dipl.-Ing. F. Klingseisen, Postfach 10 15 61
80089 München
80089 München (DE)

   


(54) A valve body and a liquid storage container for a liquid discharge device utilizing the valve body


(57) A porous material such as polyurethane foam is compressed to form skeletal portions in a three-dimensional network and mutually communicated pores or passages. The passages are closed at the skeletal portions by contacting the skeletal portions with each other so that valve caps are formed for closing the passages. Thus formed valve body is applicable to pen tips for writing instruments and printer heads for ink jet printers.






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