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GB1406655A - Fuser control circuit for copying apparatus - Google Patents

Fuser control circuit for copying apparatus

Info

Publication number
GB1406655A
GB1406655A GB4689572A GB4689572A GB1406655A GB 1406655 A GB1406655 A GB 1406655A GB 4689572 A GB4689572 A GB 4689572A GB 4689572 A GB4689572 A GB 4689572A GB 1406655 A GB1406655 A GB 1406655A
Authority
GB
United Kingdom
Prior art keywords
amplifier
temperature
fuser
copying apparatus
triggered
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.)
Expired
Application number
GB4689572A
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.)
Xerox Corp
Original Assignee
Xerox 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 Xerox Corp filed Critical Xerox Corp
Publication of GB1406655A publication Critical patent/GB1406655A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
    • G05D23/24—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature the sensing element having a resistance varying with temperature, e.g. a thermistor
    • 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)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Fixing For Electrophotography (AREA)
  • Control Of Temperature (AREA)

Abstract

1406655 Heat fusing: automatic temperature control XEROX CORP 11 Oct 1972 [18 Oct 1971] 46895/72 Headings G2H and G3R Copying apparatus has an automatic fuser temperature control using a temperature variable resistor sensing the fuser temperature, an amplifier and a heater, which is switched off at a pre-set fuser temperature, actuation of the copying apparatus being prevented when the fuser temperature is below a predetermined minimum. In the embodiment, the fuser temperature is sensed by thermistor 45. For temperatures below the predetermined minimum, switching amplifier 55 is triggered on to energize relay 60', 60 and thus turn on heating lamp 44 in the fuser. At the minimum temperature and above, the output across thermistor 45 turns operational amplifier 50 on, amplifier 55 remaining on, and an amplifier 56 being triggered on to close relay contact 63, allowing the copying apparatus 10 to be operated upon closure of switch 69. At the required temperature, set by biasing resistors 58, 59, amplifier 55 turns off to terminate the heating. The required temperature is maintained by switching of amplifier 55. If the fuser temperature falls below the minimum value, amplifier 56 turns off to stop the apparatus 10. Similarly if the temperature rises above a pre-set maximum, and a time delay set by circuit 72 has elapsed from the starting of the apparatus, amplifier 57 is triggered on to open relay contact 67, stopping the apparatus 10 and sounding an alarm. Contact 67 may be manually reset. Amplifier 57 may also stop the machine if the thermistor fails, in which case, transistor 70 is turned off, to turn off amplifier 50.
GB4689572A 1971-10-18 1972-10-11 Fuser control circuit for copying apparatus Expired GB1406655A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US18985971A 1971-10-18 1971-10-18

Publications (1)

Publication Number Publication Date
GB1406655A true GB1406655A (en) 1975-09-17

Family

ID=22699059

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4689572A Expired GB1406655A (en) 1971-10-18 1972-10-11 Fuser control circuit for copying apparatus

Country Status (5)

Country Link
US (1) US3735092A (en)
JP (1) JPS5412060B2 (en)
CA (1) CA991254A (en)
GB (1) GB1406655A (en)
NL (1) NL161273C (en)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2224005A1 (en) * 1972-05-17 1973-11-29 Bosch Gmbh Robert CONTROL DEVICE FOR INFLUENCING THE FUEL TREATMENT FOR COMBUSTION ENGINE
US3804516A (en) * 1972-12-11 1974-04-16 Xerox Corp Fire detecting device for a photographic printing machine
US3849628A (en) * 1973-07-25 1974-11-19 Xerox Corp Non-contact temperature sensor for a roll fuser of a xerographic reproduction apparatus
US4046990A (en) * 1975-04-07 1977-09-06 Eastman Kodak Company Temperature sensing and control of a fusing roll
US4006985A (en) * 1975-09-05 1977-02-08 Xerox Corporation Xerographic apparatus having time controlled fusing
DE2608295C2 (en) * 1976-02-28 1982-11-18 Brown, Boveri & Cie Ag, 6800 Mannheim Electronic temperature controller for regulating the energy supply for an electrical heating element
JPS52127341A (en) * 1976-04-19 1977-10-25 Canon Inc Fixing device for copying machne for electronic photography
JPS54111081A (en) * 1978-02-21 1979-08-31 Taiyou Tomuko Kk Overheating prevention circuit
JPS55164867A (en) * 1979-06-08 1980-12-22 Canon Inc Temperature control unit
GB2051677B (en) * 1979-05-17 1983-10-12 Canon Kk Image formation apparatus
US4372675A (en) * 1980-11-28 1983-02-08 Xerox Corporation Variable power fuser control
JPS5814871A (en) * 1981-07-21 1983-01-27 Mita Ind Co Ltd Heating and fixing device of electrophotographic copying machine
JPS59214068A (en) * 1983-05-19 1984-12-03 Fuji Xerox Co Ltd Fixing device of electrophotographic copying machine
US6188854B1 (en) * 1999-11-09 2001-02-13 Tommy C. Coleman Non-contact thermal temperature controller
BR0003627A (en) * 1999-08-16 2001-04-03 Xerox Corp Flicker-free fuser control
US7103292B2 (en) * 2003-10-20 2006-09-05 Hewlett-Packard Development Company, L.P. Heat indicating system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3337792A (en) * 1963-07-09 1967-08-22 Loral Electronics Corp Firing angle control circuit for silicon controlled rectifiers
US3496339A (en) * 1966-04-23 1970-02-17 Dunlop Co Ltd Electrical heating systems
GB1187569A (en) * 1966-04-28 1970-04-08 Arlside Ltd Reprographic Apparatus

Also Published As

Publication number Publication date
NL161273C (en) 1980-01-15
NL161273B (en) 1979-08-15
CA991254A (en) 1976-06-15
JPS5412060B2 (en) 1979-05-19
JPS4850736A (en) 1973-07-17
US3735092A (en) 1973-05-22
NL7213382A (en) 1972-12-27

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
433D Application made for revocation (sect. 33/1949)
433C Case decided by the comptroller ** specification amended (sect. 33/1949)
SP Amendment (slips) printed
746 Register noted 'licences of right' (sect. 46/1977)
PCNP Patent ceased through non-payment of renewal fee