US3909126A - Multi-process control system for an electrophotographic printing machine - Google Patents

Multi-process control system for an electrophotographic printing machine Download PDF

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Publication number
US3909126A
US3909126A US452101A US45210174A US3909126A US 3909126 A US3909126 A US 3909126A US 452101 A US452101 A US 452101A US 45210174 A US45210174 A US 45210174A US 3909126 A US3909126 A US 3909126A
Authority
US
United States
Prior art keywords
probe
recited
printing machine
photoconductive
electrophotographic printing
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 - Lifetime
Application number
US452101A
Other languages
English (en)
Inventor
Charles A Whited
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
Priority to US452101A priority Critical patent/US3909126A/en
Priority to CA218,972A priority patent/CA1081762A/en
Priority to NL7501858A priority patent/NL7501858A/xx
Priority to SE7502358A priority patent/SE396660B/xx
Priority to JP50029448A priority patent/JPS592898B2/ja
Priority to IT21283/75A priority patent/IT1034292B/it
Priority to GB11005/75A priority patent/GB1497289A/en
Priority to FR7508191A priority patent/FR2265122B1/fr
Priority to DE19752511803 priority patent/DE2511803A1/de
Application granted granted Critical
Publication of US3909126A publication Critical patent/US3909126A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • G03G15/5033—Machine control of apparatus for electrographic processes using a charge pattern, e.g. regulating differents parts of the machine, multimode copiers, microprocessor control by measuring the photoconductor characteristics, e.g. temperature, or the characteristics of an image on the photoconductor
    • G03G15/5037—Machine control of apparatus for electrographic processes using a charge pattern, e.g. regulating differents parts of the machine, multimode copiers, microprocessor control by measuring the photoconductor characteristics, e.g. temperature, or the characteristics of an image on the photoconductor the characteristics being an electrical parameter, e.g. voltage

Definitions

  • each processing station is substantially optimized for the specific characteristics of the photoconductive surface employed and the changes occurring thereto during the processing.
  • Capacitor 92 is recharged to this voltage.
  • the output voltage is applied to power supply high-voltage operational amplifier 96 which holds the voltage output from the respective processing stations substantially constant until the next signal is received.
  • contact 94 is again opened and the whole circuit waits for the next sample. It is evident, therefore, that this type of arrangement permits the probe of the present invention to detect both increases and decreases in potential while, substantially simultaneously therewith, generating a continuous control signal for regulating the potential applied to the respective processing stations.
  • the foregoing circuitry heretofore described with regard to FIG. 4 will be referred to hereinafter by the reference numeral 98.
  • the machine logic provides the other signal for the AND gate so as to actuate the appropriate channel corresponding to the developer unit being excited. It would be obvious to one skilled in the art that a single color electrophotographic machine would only require one channel inasmuch as only one developer unit is employed.
  • a suitable development system employing a plurality of developer units is disclosed in co-pending application Ser. No. 255,259 filed in 1970, the disclosure of which is hereby incorporated into the present application. It should be noted that voltage source 114 is adapted to electrically bias developer rolls 115, 117 and 119 to a normal voltage of about 500 volts.

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Control Or Security For Electrophotography (AREA)
  • Discharging, Photosensitive Material Shape In Electrophotography (AREA)
  • Exposure Or Original Feeding In Electrophotography (AREA)
  • Dry Development In Electrophotography (AREA)
US452101A 1974-03-18 1974-03-18 Multi-process control system for an electrophotographic printing machine Expired - Lifetime US3909126A (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
US452101A US3909126A (en) 1974-03-18 1974-03-18 Multi-process control system for an electrophotographic printing machine
CA218,972A CA1081762A (en) 1974-03-18 1975-01-29 Multi-process control system for an electrophotographic printing machine
NL7501858A NL7501858A (nl) 1974-03-18 1975-02-17 Besturingssysteem voor meerdere behandelingen in een elektrofotografische drukmachine.
SE7502358A SE396660B (sv) 1974-03-18 1975-03-03 Givare for avkenning av pa en fotokonduktiv yta i en elektrostatografisk kopieringsmaskin herskande elektrostatiska uppladdningstillstand
JP50029448A JPS592898B2 (ja) 1974-03-18 1975-03-11 静電複写機に用いられる光導電部材をシュミレ−トする検出装置
IT21283/75A IT1034292B (it) 1974-03-18 1975-03-14 Macchina da stampa elettrofotografica
GB11005/75A GB1497289A (en) 1974-03-18 1975-03-17 Multi-process control system for an electrophotographic printing machine
FR7508191A FR2265122B1 (he) 1974-03-18 1975-03-17
DE19752511803 DE2511803A1 (de) 1974-03-18 1975-03-18 Einrichtung zum nachbilden einer fotoleitfaehigen bildplatte

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US452101A US3909126A (en) 1974-03-18 1974-03-18 Multi-process control system for an electrophotographic printing machine

Publications (1)

Publication Number Publication Date
US3909126A true US3909126A (en) 1975-09-30

Family

ID=23795040

Family Applications (1)

Application Number Title Priority Date Filing Date
US452101A Expired - Lifetime US3909126A (en) 1974-03-18 1974-03-18 Multi-process control system for an electrophotographic printing machine

Country Status (9)

Country Link
US (1) US3909126A (he)
JP (1) JPS592898B2 (he)
CA (1) CA1081762A (he)
DE (1) DE2511803A1 (he)
FR (1) FR2265122B1 (he)
GB (1) GB1497289A (he)
IT (1) IT1034292B (he)
NL (1) NL7501858A (he)
SE (1) SE396660B (he)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4248524A (en) * 1977-07-11 1981-02-03 Canon Kabushiki Kaisha Method of and apparatus for stabilizing electrophotographic images
JP2766020B2 (ja) * 1990-01-24 1998-06-18 株式会社日立製作所 静電記録装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3788739A (en) * 1972-06-21 1974-01-29 Xerox Corp Image compensation method and apparatus for electrophotographic devices

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3749488A (en) * 1972-05-15 1973-07-31 Dick Co Ab Exposure control in electrostatic photocopying processes

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3788739A (en) * 1972-06-21 1974-01-29 Xerox Corp Image compensation method and apparatus for electrophotographic devices

Also Published As

Publication number Publication date
FR2265122B1 (he) 1980-09-12
JPS50129042A (he) 1975-10-11
IT1034292B (it) 1979-09-10
JPS592898B2 (ja) 1984-01-21
FR2265122A1 (he) 1975-10-17
GB1497289A (en) 1978-01-05
NL7501858A (nl) 1975-05-30
SE396660B (sv) 1977-09-26
CA1081762A (en) 1980-07-15
SE7502358L (he) 1975-09-19
DE2511803A1 (de) 1975-10-02

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