(19)
(11) EP 0 513 585 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
26.05.1993 Bulletin 1993/21

(43) Date of publication A2:
19.11.1992 Bulletin 1992/47

(21) Application number: 92107192.4

(22) Date of filing: 28.04.1992
(51) International Patent Classification (IPC)5: B41J 2/325
(84) Designated Contracting States:
DE FR GB

(30) Priority: 14.05.1991 JP 33244/91 U
25.06.1991 JP 152873/91

(71) Applicant: ROHM CO., LTD.
Kyoto (JP)

(72) Inventors:
  • Tagashira, Fumiaki, c/o Rohm Co., Ltd.
    Ukyo-ku, Kyoto (JP)
  • Ooyama, Shingo, c/o Rohm Co., Ltd.
    Ukyo-ku, Kyoto (JP)
  • Ota, Shigeo, c/o Rohm Co., Ltd.
    Ukyo-ku, Kyoto (JP)
  • Kishimoto, Yoshinobu, c/o Rohm Co., Ltd.
    Ukyo-ku, Kyoto (JP)

(74) Representative: Reinhard - Skuhra - Weise & Partner 
Postfach 44 01 51
80750 München
80750 München (DE)


(56) References cited: : 
   
       


    (54) Printing unit incorporating thermal head


    (57) A printing unit comprises an elongate base member (1), a thermal head (2) mounted on the base member and carrying a line (3) of heating dots, a platen roller (4) arranged to contact the heating dot line, and a backup roller (5) arranged farther from the thermal head than the platen roller but held parallel to the platen roller in contact therewith. Printing paper (14) is transferred between the thermal head and the platen roller for thermal printing by the line of heating dots. The backup roller is located ahead of the platen roller with respect to the paper transfer direction to prevent the platen roller from bending in the paper transfer direction.






    Search report