(19)
(11) EP 3 121 027 A8

(12) CORRECTED EUROPEAN PATENT APPLICATION
Note: Bibliography reflects the latest situation

(15) Correction information:
Corrected version no 1 (W1 A1)

(48) Corrigendum issued on:
15.03.2017 Bulletin 2017/11

(88) Date of publication A3:
25.01.2017 Bulletin 2017/04

(43) Date of publication:
25.01.2017 Bulletin 2017/04

(21) Application number: 16183545.9

(22) Date of filing: 08.02.2008
(51) International Patent Classification (IPC): 
B43K 7/12(2006.01)
B43K 24/08(2006.01)
C09D 11/16(2014.01)
B43K 23/12(2006.01)
B43K 29/02(2006.01)
B43K 7/08(2006.01)
C09D 11/00(2014.01)
 B43K 24/06(2006.01)
B43K 24/12(2006.01)
B43K 1/08(2006.01)
B43K 27/12(2006.01)
B43K 7/02(2006.01)
B43K 7/10(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR

(30) Priority: 26.02.2007 JP 2007046226
21.07.2007 JP 2007190261
15.01.2008 JP 2008005267

(62) Application number of the earlier application in accordance with Art. 76 EPC:
08711046.6 / 2130684

(71) Applicants:
  • THE PILOT INK CO., LTD.
    Nagoya-shi, Aichi 466-8588 (JP)
  • Kabushiki Kaisha Pilot Corporation (also trading as Pilot Corporation)
    Tokyo 104-8304 (JP)

(72) Inventors:
  • IMAMURA, Yoshinori
    Nagoya-shi, Aichi 466-8588 (JP)
  • SEKINE, Nobuo
    Nagoya-shi, Aichi 466-8588 (JP)
  • ANDO, Masashi
    Nagoya-shi, Aichi 466-8588 (JP)

(74) Representative: Hoffmann Eitle 
Patent- und Rechtsanwälte PartmbB Arabellastraße 30
81925 München
81925 München (DE)

 
Remarks:
This application was filed on 10.08.2016 as a divisional application to the application mentioned under INID code 62.
 


(54) THERMOCHROMIC WRITING INSTRUMENT


(57) A thermochromic writing instrument containing a thermochromic ink (83) comprises a barrel (2) and a writing body (8) accommodated in the barrel (2). A pen tip (81) capable of ejecting the thermochromic ink (83) is provided at a front end of the writing body (8), and a friction portion (4), having a low abrasion property, capable of thermally changing color of the handwriting of the thermochromic ink (83) by the frictional heat generated when the handwriting is rubbed with the friction portion (4) is provided on the outer surface of the barrel (2). The writing body (8) is accommodated in the barrel (2) so as to be capable of moving in a longitudinal direction, and the thermochromic writing instrument further comprises an operation portion (5) provided on the outer surface of the barrel (2) so as to project radially outward from a side wall of the barrel (2). The pen tip (81) of the writing body (8) is adapted to project from / retract into a front-end hole (31) of the barrel (2) by operating the operation portion (5). The thermochromic writing instrument further comprises a side slide type projection/retraction mechanism which shifts the pen tip (81) from the pen-tip-retracted state to the pen-tip-projected state by a forward press operation of the operation portion (5). The friction portion (4) is provided at the front end of the barrel (2), whereby the friction portion (4) and the operation portion (5) are disposed independently of each other on the outer surface of the barrel (2).