(19)
(11) EP 2 672 327 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
20.12.2017 Bulletin 2017/51

(43) Date of publication A2:
11.12.2013 Bulletin 2013/50

(21) Application number: 13168004.3

(22) Date of filing: 16.05.2013
(51) International Patent Classification (IPC): 
G03G 15/20(2006.01)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME

(30) Priority: 08.06.2012 JP 2012130734

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

(72) Inventors:
  • Yamashina, Ryota
    Tokyo 143-8555 (JP)
  • Seo, Hiroshi
    Tokyo 143-8555 (JP)
  • Fujimoto, Ippei
    Tokyo 143-8555 (JP)
  • Waida, Takumi
    Tokyo 143-8555 (JP)

(74) Representative: Schwabe - Sandmair - Marx 
Patentanwälte Rechtsanwalt Partnerschaft mbB Joseph-Wild-Straße 20
81829 München
81829 München (DE)

   


(54) Fixing device and image forming apparatus


(57) A fixing device (22) sets a control period and a gap between recording media so that T1 + T2 = C x N is satisfied, where T1 denotes a time from when the leading end of a recording medium reaches a nip to when the trailing end thereof passes through the nip, T2 denotes a time corresponding to the gap between the recording media, C denotes the control period, and N denotes a positive integer; and heat generated by a heat source (5) is supplied to the recording medium in synchronization with a timing at which the recording medium enters the nip. A correction amount is added to an electrification time in each control period and reduced at a predetermined rate in each control period based on temperature information of a pressing member (2) before start of feeding. The correction amount is changed depending on the basis weight of the recording medium.







Search report









Search report