JPS5779977A - Heat roller fixing device - Google Patents

Heat roller fixing device

Info

Publication number
JPS5779977A
JPS5779977A JP55155126A JP15512680A JPS5779977A JP S5779977 A JPS5779977 A JP S5779977A JP 55155126 A JP55155126 A JP 55155126A JP 15512680 A JP15512680 A JP 15512680A JP S5779977 A JPS5779977 A JP S5779977A
Authority
JP
Japan
Prior art keywords
roller
temp
circumferential
fixing device
cam
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP55155126A
Other languages
Japanese (ja)
Inventor
Setsuo Soga
Mitsuo Hasebe
Toshiyuki Kikuchi
Tatsuo Tani
Kyoji Komi
Isao Nakamura
Hisao Tatsumi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP55155126A priority Critical patent/JPS5779977A/en
Publication of JPS5779977A publication Critical patent/JPS5779977A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/20—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat
    • G03G15/2003—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat
    • G03G15/2014—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat using contact heat
    • G03G15/2064—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat using contact heat combined with pressure
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/20—Details of the fixing device or porcess
    • G03G2215/2003—Structural features of the fixing device
    • G03G2215/2045—Variable fixing speed

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fixing For Electrophotography (AREA)
  • Control Or Security For Electrophotography (AREA)

Abstract

PURPOSE:To relax the limitation of the number of continuous copying sheets owing to the deficiency of electric power by controlling the rotating speed of a fixing roller and the pressure between said roller and a pressurizing roller according to the drop in the circumferential surface temp. of the fixing roller. CONSTITUTION:The circumferential temp. of a fixing roller 1 is detected by a temp. sensor 5, and is compared with plural set values in a comparator 6, and a motor 9 and a cam 10 are controlled by a driving circuit 8. When the circumferential temp. of the roller 1 drops, the rotating speed of the roller 1 is so controlled by the motor 9 and the cam 10 as to lower stepwise and the pressure between said roller and a pressurizing roller 2 as to increase stepwise. Thereby, the nip time is increased according to the drop of the circumferential surface temp. of the roller 1.
JP55155126A 1980-11-06 1980-11-06 Heat roller fixing device Pending JPS5779977A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55155126A JPS5779977A (en) 1980-11-06 1980-11-06 Heat roller fixing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55155126A JPS5779977A (en) 1980-11-06 1980-11-06 Heat roller fixing device

Publications (1)

Publication Number Publication Date
JPS5779977A true JPS5779977A (en) 1982-05-19

Family

ID=15599121

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55155126A Pending JPS5779977A (en) 1980-11-06 1980-11-06 Heat roller fixing device

Country Status (1)

Country Link
JP (1) JPS5779977A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60100166A (en) * 1983-11-07 1985-06-04 Fuji Xerox Co Ltd Fixing device for electrophotographic copying machine
EP2246742A3 (en) * 2009-04-27 2011-10-26 Ricoh Company, Ltd. Fixing device and image forming apparatus incorporating same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60100166A (en) * 1983-11-07 1985-06-04 Fuji Xerox Co Ltd Fixing device for electrophotographic copying machine
EP2246742A3 (en) * 2009-04-27 2011-10-26 Ricoh Company, Ltd. Fixing device and image forming apparatus incorporating same
US8463150B2 (en) 2009-04-27 2013-06-11 Ricoh Company Limited Fixing device and image forming apparatus incorporating same

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