JPS5773773A - Method for warranting quality of copy of copier - Google Patents
Method for warranting quality of copy of copierInfo
- 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
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.
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)
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 |
-
1980
- 1980-10-24 JP JP55148378A patent/JPS5773773A/en active Pending
Cited By (20)
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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