JPS5773772A - Heating fixation roller - Google Patents

Heating fixation roller

Info

Publication number
JPS5773772A
JPS5773772A JP15093280A JP15093280A JPS5773772A JP S5773772 A JPS5773772 A JP S5773772A JP 15093280 A JP15093280 A JP 15093280A JP 15093280 A JP15093280 A JP 15093280A JP S5773772 A JPS5773772 A JP S5773772A
Authority
JP
Japan
Prior art keywords
temperature
ptc
flow
fixation roller
resistance
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
JP15093280A
Other languages
Japanese (ja)
Inventor
Yoshinori Shiraiwa
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.)
Kyoto Ceramic Co Ltd
Kyocera Corp
Original Assignee
Kyoto Ceramic Co Ltd
Kyocera Corp
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 Kyoto Ceramic Co Ltd, Kyocera Corp filed Critical Kyoto Ceramic Co Ltd
Priority to JP15093280A priority Critical patent/JPS5773772A/en
Publication of JPS5773772A publication Critical patent/JPS5773772A/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
    • G03G15/2053—Structural details of heat elements, e.g. structure of roller or belt, eddy current, induction heating
    • G03G15/2057—Structural details of heat elements, e.g. structure of roller or belt, eddy current, induction heating relating to the chemical composition of the heat element and layers thereof

Abstract

PURPOSE:To eliminate necessity of a temperature controlling device and maintenance of a heater by using a heat generating cylinder made of porcelain of barium titanate group etc. that has positive temperature resistance characteristic for a heating fixation roller. CONSTITUTION:A heat generating cylinder 2 which is the main body of the heating fixation roller 1 is made through forming porcelain PTC of barium titanate, etc., that has very large positive resistance characteristic to cylindrical shape. When temperature is low, this PTC has small resistance and causes relatively large current to flow, and by the flow of current, temperature rises due to Joule heat generated in PTC itself. When temperature arrives at a constant value, resistance of PTC becomes suddenly high and restrains current flow to decrease generation of Joule heat and maintains temperature at a fixed value. Consequently, temperature distribution becomes uniform over the whole surface of the roller 1. No change with the passage of time due to disconnection or oxidation etc., occurs and maintenance such as charge of the heater becomes unnecessary.
JP15093280A 1980-10-27 1980-10-27 Heating fixation roller Pending JPS5773772A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15093280A JPS5773772A (en) 1980-10-27 1980-10-27 Heating fixation roller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15093280A JPS5773772A (en) 1980-10-27 1980-10-27 Heating fixation roller

Publications (1)

Publication Number Publication Date
JPS5773772A true JPS5773772A (en) 1982-05-08

Family

ID=15507554

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15093280A Pending JPS5773772A (en) 1980-10-27 1980-10-27 Heating fixation roller

Country Status (1)

Country Link
JP (1) JPS5773772A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6415783A (en) * 1987-07-09 1989-01-19 Tokai Rubber Ind Ltd Fixing roller

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6415783A (en) * 1987-07-09 1989-01-19 Tokai Rubber Ind Ltd Fixing roller

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