JPS57147659A - Power control method for electrophotographic copying machine - Google Patents

Power control method for electrophotographic copying machine

Info

Publication number
JPS57147659A
JPS57147659A JP56032414A JP3241481A JPS57147659A JP S57147659 A JPS57147659 A JP S57147659A JP 56032414 A JP56032414 A JP 56032414A JP 3241481 A JP3241481 A JP 3241481A JP S57147659 A JPS57147659 A JP S57147659A
Authority
JP
Japan
Prior art keywords
power supply
lamp
power
feed
fixing heater
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
JP56032414A
Other languages
Japanese (ja)
Inventor
Masao Hosaka
Yoshitaka Ogino
Nobuyuki Yanagawa
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 JP56032414A priority Critical patent/JPS57147659A/en
Publication of JPS57147659A publication Critical patent/JPS57147659A/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
    • G03G15/50—Machine control of apparatus for electrographic processes using a charge pattern, e.g. regulating differents parts of the machine, multimode copiers, microprocessor control
    • G03G15/5004—Power supply control, e.g. power-saving mode, automatic power turn-off

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Control Or Security For Electrophotography (AREA)

Abstract

PURPOSE:To stop the supply of an eddy current, by prevnting simultaneous power supply to a lamp and fixing heater. CONSTITUTION:When timings of feed to plural AC loads are contentious in the half cycle of AC, feed to the load of the next priority level is started after the completion of feed to the load of the highest priority level in accordance with predetermined priority levels for feed, and thus, the whole of the half cycle of AC is used without indle parts apparently. That is, when the power source voltage crosses the level zero, a transistor becomes conductive to supply power to an exposure lamp. The power supply is interrupted at a phase angle theta to control the quantity of exposure light. After the lamp is turned off, the power supply to a fixing heater is started. Since the exposure lamp is not used when an optical system returns, power is supplied to the fixing heater during returning of the optical system. This power supply is repeated intermittently for the control of a fixing temperature. Since power is not supplied simultaneously to the lamp and the fixing heater when the optical system goes, troubles such as overheat due to an eddy current and the noise at a power supply start time are not generated.
JP56032414A 1981-03-09 1981-03-09 Power control method for electrophotographic copying machine Pending JPS57147659A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56032414A JPS57147659A (en) 1981-03-09 1981-03-09 Power control method for electrophotographic copying machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56032414A JPS57147659A (en) 1981-03-09 1981-03-09 Power control method for electrophotographic copying machine

Publications (1)

Publication Number Publication Date
JPS57147659A true JPS57147659A (en) 1982-09-11

Family

ID=12358284

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56032414A Pending JPS57147659A (en) 1981-03-09 1981-03-09 Power control method for electrophotographic copying machine

Country Status (1)

Country Link
JP (1) JPS57147659A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4819022A (en) * 1986-03-11 1989-04-04 Mita Industrial Co., Ltd. Automatic exposure device for copying machine
DE3915024A1 (en) * 1988-05-07 1989-11-16 Fuji Xerox Co Ltd DEVICE STORING INFORMATION AND METHOD FOR THE SYSTEMATIC DESIGN OF SUCH A DEVICE

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5540494A (en) * 1979-08-30 1980-03-21 Minolta Camera Co Ltd Power control unit of heat fixing device of electrophotographic copier

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5540494A (en) * 1979-08-30 1980-03-21 Minolta Camera Co Ltd Power control unit of heat fixing device of electrophotographic copier

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4819022A (en) * 1986-03-11 1989-04-04 Mita Industrial Co., Ltd. Automatic exposure device for copying machine
DE3915024A1 (en) * 1988-05-07 1989-11-16 Fuji Xerox Co Ltd DEVICE STORING INFORMATION AND METHOD FOR THE SYSTEMATIC DESIGN OF SUCH A DEVICE

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