JPS5773773A - Method for warranting quality of copy of copier - Google Patents

Method for warranting quality of copy of copier

Info

Publication number
JPS5773773A
JPS5773773A JP55148378A JP14837880A JPS5773773A JP S5773773 A JPS5773773 A JP S5773773A JP 55148378 A JP55148378 A JP 55148378A JP 14837880 A JP14837880 A JP 14837880A JP S5773773 A JPS5773773 A JP S5773773A
Authority
JP
Japan
Prior art keywords
temperature
heater
change
monitored
converter
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
JP55148378A
Other languages
Japanese (ja)
Inventor
Masao Hosaka
Yoshitaka Ogino
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 JP55148378A priority Critical patent/JPS5773773A/en
Publication of JPS5773773A publication Critical patent/JPS5773773A/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

Landscapes

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

Abstract

PURPOSE:To obtain copies of good quality without unfixed one and save energy by detecting factors for change of fixing temperature and supplying necessary electric power to the heater of a fixing device, and thereby improving response to change of temperature. CONSTITUTION:A temperature sensor detecting signal outputted from a temperature detecting circuit according to the temperature of a heater 34 is converted to a digital signal by an A/D converter 44. This is checked and the initial value of temperature of the heater 34 is monitored. Then, change of power source voltage, linear velocity of copying paper and number of continuous copying which are the factors of change of temperature of the heater 34 are monitored. Further, the result of conversion of a pattern detecting circuit 72 by the A/D converter is read out successively and white and black density ratio of the original 9 which is a factor of change of temperature of the heater 34 is monitored. Next, the amount of control of electric power is operated according to the number of copies, power source voltage, linear velocity and densitvy ratio, and power supply to the heater 34 is controlled basing on the result of operation.
JP55148378A 1980-10-24 1980-10-24 Method for warranting quality of copy of copier Pending JPS5773773A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55148378A JPS5773773A (en) 1980-10-24 1980-10-24 Method for warranting quality of copy of copier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55148378A JPS5773773A (en) 1980-10-24 1980-10-24 Method for warranting quality of copy of copier

Publications (1)

Publication Number Publication Date
JPS5773773A true JPS5773773A (en) 1982-05-08

Family

ID=15451415

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55148378A Pending JPS5773773A (en) 1980-10-24 1980-10-24 Method for warranting quality of copy of copier

Country Status (1)

Country Link
JP (1) JPS5773773A (en)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59126578A (en) * 1983-01-10 1984-07-21 Hitachi Ltd Heat fixing device of copying machine
JPS59219767A (en) * 1983-05-27 1984-12-11 Canon Inc Heat fixing device
JPS60121480A (en) * 1983-12-05 1985-06-28 Sharp Corp Heat fixing device
JPS616713A (en) * 1984-06-20 1986-01-13 Iwatsu Electric Co Ltd Fixing temperature control device of photoengraving device
JPS6126071A (en) * 1984-07-17 1986-02-05 Canon Inc Image formation controller
EP0373654A2 (en) * 1988-12-15 1990-06-20 Canon Kabushiki Kaisha Recording apparatus
US5331384A (en) * 1989-01-25 1994-07-19 Canon Kabushiki Kaisha Fixing apparatus having temperature controller which controls temperature according to width size and number of recording sheets
US5742865A (en) * 1995-07-28 1998-04-21 Oki Data Corporation Apparatus for controlling temperature of fixing device by increasing the temperature for each sheet of a continuous fixing operation
EP1542085A1 (en) * 2003-12-08 2005-06-15 Ricoh Company, Ltd. Heating device with power supplies, fixing device using the heating device and image forming apparatus using the fixing device
EP1542092A3 (en) * 2003-12-08 2005-10-12 Ricoh Company, Ltd. Heater, fixing unit and image forming apparatus
JP2006119194A (en) * 2004-10-19 2006-05-11 Ricoh Co Ltd Image forming apparatus
JP2006133438A (en) * 2004-11-05 2006-05-25 Ricoh Co Ltd Image forming apparatus
JP2013037084A (en) * 2011-08-04 2013-02-21 Canon Inc Image formation device

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59126578A (en) * 1983-01-10 1984-07-21 Hitachi Ltd Heat fixing device of copying machine
JPH056195B2 (en) * 1983-01-10 1993-01-26 Hitachi Ltd
JPS59219767A (en) * 1983-05-27 1984-12-11 Canon Inc Heat fixing device
JPH0582586B2 (en) * 1983-05-27 1993-11-19 Canon Kk
JPS60121480A (en) * 1983-12-05 1985-06-28 Sharp Corp Heat fixing device
JPS616713A (en) * 1984-06-20 1986-01-13 Iwatsu Electric Co Ltd Fixing temperature control device of photoengraving device
JPS6126071A (en) * 1984-07-17 1986-02-05 Canon Inc Image formation controller
EP0373654A2 (en) * 1988-12-15 1990-06-20 Canon Kabushiki Kaisha Recording apparatus
US5303015A (en) * 1988-12-15 1994-04-12 Canon Kabushiki Kaisha Recording apparatus for conserving energy
US5331384A (en) * 1989-01-25 1994-07-19 Canon Kabushiki Kaisha Fixing apparatus having temperature controller which controls temperature according to width size and number of recording sheets
US5742865A (en) * 1995-07-28 1998-04-21 Oki Data Corporation Apparatus for controlling temperature of fixing device by increasing the temperature for each sheet of a continuous fixing operation
EP1542085A1 (en) * 2003-12-08 2005-06-15 Ricoh Company, Ltd. Heating device with power supplies, fixing device using the heating device and image forming apparatus using the fixing device
EP1542092A3 (en) * 2003-12-08 2005-10-12 Ricoh Company, Ltd. Heater, fixing unit and image forming apparatus
US7609988B2 (en) 2003-12-08 2009-10-27 Ricoh Company, Ltd. Heater, fixing unit and image forming apparatus having power supplied from chargeable auxiliary power supplying unit varied per unit time
US7664410B2 (en) 2003-12-08 2010-02-16 Ricoh Company, Ltd. Image forming apparatus with control of power to a fixing unit
US7885569B2 (en) 2003-12-08 2011-02-08 Ricoh Company, Ltd. Heater, fixing unit and image forming apparatus operable with a main and auxiliary power supply unit
US7957663B2 (en) 2003-12-08 2011-06-07 Ricoh Company, Ltd. Heater, fixing unit and image forming apparatus
JP2006119194A (en) * 2004-10-19 2006-05-11 Ricoh Co Ltd Image forming apparatus
JP2006133438A (en) * 2004-11-05 2006-05-25 Ricoh Co Ltd Image forming apparatus
JP2013037084A (en) * 2011-08-04 2013-02-21 Canon Inc Image formation device

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