(19)
(11) EP 1 022 157 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
09.04.2003 Bulletin 2003/15

(43) Date of publication A2:
26.07.2000 Bulletin 2000/30

(21) Application number: 00101169.1

(22) Date of filing: 21.01.2000
(51) International Patent Classification (IPC)7B44C 1/17
(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: 21.01.1999 JP 1305899

(71) Applicant: Ricoh Company, Ltd.
Tokyo 143-8555 (JP)

(72) Inventors:
  • Kimura, Shigeaki, c/o Ricoh Co., Ltd.
    Tokyo 143-8555 (JP)
  • Mimura, Yoshihiro, c/o Ricoh Co., Ltd.
    Tokyo 143-8555 (JP)

(74) Representative: Barz, Peter, Dr. 
Patentanwalt Kaiserplatz 2
80803 München
80803 München (DE)

   


(54) Toner image bearing transfer sheet and method for fire fixing toner image using the toner image bearing transfer sheet


(57) A transfer sheet for ceramics has a support, a water-soluble layer formed thereon, and a resin film layer with a thickness of 1 µm or more formed on the water-soluble layer, the resin film layer bearing thereon a toner image which is capable of producing a chromatic color after sintered, and is prepared by an electrophotographic process using a toner which contains a coloring agent, a binder agent, and a fritted glaze. A toner image is fire fixed to a heat-resistant solid surface by forming the toner image on the above-mentioned resin film layer of the transfer sheet by the electrophotographic process using the toner, separating the resin film layer and the toner image together from the support to form a toner-image- bearing resin film member, superimposing the toner-image-bearing resin film member on the heat-resistant solid surface in such a manner that a non-toner-image-bearing side of the resin film member closely adheres to the heat-resistant solid surface, and sintering the toner-image-bearing resin film member at a sintering temperature of the resin film layer or more.





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