(19)
(11) EP 0 863 023 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
28.06.2000 Bulletin 2000/26

(43) Date of publication A2:
09.09.1998 Bulletin 1998/37

(21) Application number: 97310618.0

(22) Date of filing: 24.12.1997
(51) International Patent Classification (IPC)7: B43K 21/22, B43K 21/12, B43K 29/02
(84) Designated Contracting States:
AT BE CH 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: 03.03.1997 JP 6175497

(71) Applicant: KOTOBUKI & CO., LTD.
Kyoto-shi Kyoto (JP)

(72) Inventors:
  • Mitsuya, Yoshihide, c/o Kotobuki & Co., Ltd.
    Kawagoe-shi, Saitama-ken (JP)
  • Anzai, Shouji, c/o Kotobuki & Co., Ltd.
    Kawagoe-shi, Saitama-ken (JP)
  • Kageyama, Hidehei, c/o Kotobuki & Co., Ltd.
    Kawagoe-shi, Saitama-ken (JP)

(74) Representative: Votier, Sidney David 
CARPMAELS & RANSFORD 43, Bloomsbury Square
London WC1A 2RA
London WC1A 2RA (GB)

   


(54) Double-chuck mechanical pencil


(57) The invention is intended to prevent, in a double-chuck mechanical pencil provided with an eraser, the torsional breakage of a lead gripped by a front lead chuck and a back lead chuck due to the turning of a lead tank caused when an eraser is used, and to eliminate inconvenience to a lead supplying operation caused by the abrasion of the eraser.
A double-chuck mechanical pencil having a front lead chuck (11) for holding a lead and a back lead chuck (5) for advancing a lead, comprises a barrel (1), a lead tank (4) connected to the back lead chuck (5), an adapter (3) fixedly put on a back portion of the lead tank (4), restrained from rotation relative to the barrel (1) and axially movable, and a rotary eraser projecting mechanism (12) provided with a support member (13) or an eraser support structure (16) provided with a support member (17) restrained from rotation relative to the adapter (3) and detachably connected to a back portion of the adapter (3).






Search report