JPS5460931A - Heat fixing device - Google Patents

Heat fixing device

Info

Publication number
JPS5460931A
JPS5460931A JP12639777A JP12639777A JPS5460931A JP S5460931 A JPS5460931 A JP S5460931A JP 12639777 A JP12639777 A JP 12639777A JP 12639777 A JP12639777 A JP 12639777A JP S5460931 A JPS5460931 A JP S5460931A
Authority
JP
Japan
Prior art keywords
layer
springs
secured
semiconductor
temperature distribution
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
JP12639777A
Other languages
Japanese (ja)
Inventor
Ryuzo Suzuki
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 JP12639777A priority Critical patent/JPS5460931A/en
Publication of JPS5460931A publication Critical patent/JPS5460931A/en
Pending legal-status Critical Current

Links

Landscapes

  • Fixing For Electrophotography (AREA)

Abstract

PURPOSE:To improve heat efficiency, reduce preheat time and obtain a uniform temperature distribution by using a ceramic semiconductor of valency control type having a peculiar property wherein its electric resistance increases sharply at curie temperature. CONSTITUTION:The cylindrical surface of an insulation pipe 6 composed of pyrex glass, etc. is covered and secured with a layer 7 of a ceramic semiconductor having been controlled to a desired curie temperature Tc. Shaft parts 8 are respectively fixed to both ends of the pipe 6 and are rotatably mounted to a machine frame 10 by way of bearings 9. A heat-resisting release rubber layer 11 is attached to the outside of the semiconductor layer 7 and counter electrodes 12 composed of Al, etc. of doughnut form are secured by means of vapor deposition, etc. on both ends of the semicoundutor layer. Electrode cover rings 14 are compression-bonded to the electrodes 12 by means of springs 12 and the other ends of the springs are supported in insulation rings 15. Thereby, a uniform temperature distribution may be obtained without requiring any apecial temperature control element.
JP12639777A 1977-10-22 1977-10-22 Heat fixing device Pending JPS5460931A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12639777A JPS5460931A (en) 1977-10-22 1977-10-22 Heat fixing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12639777A JPS5460931A (en) 1977-10-22 1977-10-22 Heat fixing device

Publications (1)

Publication Number Publication Date
JPS5460931A true JPS5460931A (en) 1979-05-16

Family

ID=14934127

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12639777A Pending JPS5460931A (en) 1977-10-22 1977-10-22 Heat fixing device

Country Status (1)

Country Link
JP (1) JPS5460931A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61145574A (en) * 1984-12-19 1986-07-03 Nitto Kogyo Kk Fixing roller of electronic copying machine or the like
US5722025A (en) * 1995-10-24 1998-02-24 Minolta Co., Ltd. Fixing device
US5906762A (en) * 1995-10-27 1999-05-25 Minolta Co., Ltd. Fixing device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61145574A (en) * 1984-12-19 1986-07-03 Nitto Kogyo Kk Fixing roller of electronic copying machine or the like
US5722025A (en) * 1995-10-24 1998-02-24 Minolta Co., Ltd. Fixing device
US5906762A (en) * 1995-10-27 1999-05-25 Minolta Co., Ltd. Fixing device
US6239411B1 (en) 1995-10-27 2001-05-29 Minolta Co., Ltd. Fixing device

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