JPS5788475A - Fixing temperature control device - Google Patents

Fixing temperature control device

Info

Publication number
JPS5788475A
JPS5788475A JP16427880A JP16427880A JPS5788475A JP S5788475 A JPS5788475 A JP S5788475A JP 16427880 A JP16427880 A JP 16427880A JP 16427880 A JP16427880 A JP 16427880A JP S5788475 A JPS5788475 A JP S5788475A
Authority
JP
Japan
Prior art keywords
thickness
fixing temperature
voltage
variation
automatically
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
JP16427880A
Other languages
Japanese (ja)
Inventor
Masayoshi Furuichi
Shizuo Tsuchiya
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.)
Canon Finetech Nisca Inc
Original Assignee
Copyer 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 Copyer Co Ltd filed Critical Copyer Co Ltd
Priority to JP16427880A priority Critical patent/JPS5788475A/en
Publication of JPS5788475A publication Critical patent/JPS5788475A/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
    • G03G15/2039—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat using contact heat with means for controlling the fixing temperature

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fixing For Electrophotography (AREA)

Abstract

PURPOSE:To automatically set an optimum fixing temperature, by converting a variation of reactance which is varied in accordance with thickness of a form, into a variation of oscillation frequency by use of an oscillator, detecting a variation of its frequency to discriminate the thickness of paper automatically. CONSTITUTION:For instance, when a form has thickness A, a coil 4 changes to reactance corresponding to the paper thickness A, and the oscillation frequency attains to, for instance, fA, a resonance circuit 21 resonates and a resonance current IA is generated. The resonance current IA generates voltage VA across a resistance 32. On the other hand, a resonance circuit 25 does not resonate, but in case when a current IB' has flowed, voltage VB' is generated across a resistance 36. The voltage VA and VB' are inputted to comparators 42 and 44, respectively, and are compared with reference voltage V1 and V2. As a result, a switching element 50 is turned on, a switching element 52 is turned off, and only a load 54 constituted of a relay, etc. is operated. According to such a constitution, an optimum fixing temperature is set automatically switable for a form which is fed.
JP16427880A 1980-11-21 1980-11-21 Fixing temperature control device Pending JPS5788475A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16427880A JPS5788475A (en) 1980-11-21 1980-11-21 Fixing temperature control device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16427880A JPS5788475A (en) 1980-11-21 1980-11-21 Fixing temperature control device

Publications (1)

Publication Number Publication Date
JPS5788475A true JPS5788475A (en) 1982-06-02

Family

ID=15790046

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16427880A Pending JPS5788475A (en) 1980-11-21 1980-11-21 Fixing temperature control device

Country Status (1)

Country Link
JP (1) JPS5788475A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4549803A (en) * 1983-04-12 1985-10-29 Canon Kabushiki Kaisha Recording apparatus
JP2001066942A (en) * 1999-07-16 2001-03-16 Hewlett Packard Co <Hp> Automatic control method for temperature of fusion unit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4549803A (en) * 1983-04-12 1985-10-29 Canon Kabushiki Kaisha Recording apparatus
JP2001066942A (en) * 1999-07-16 2001-03-16 Hewlett Packard Co <Hp> Automatic control method for temperature of fusion unit

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