JPS6490461A - Method for driving image forming device - Google Patents

Method for driving image forming device

Info

Publication number
JPS6490461A
JPS6490461A JP62248542A JP24854287A JPS6490461A JP S6490461 A JPS6490461 A JP S6490461A JP 62248542 A JP62248542 A JP 62248542A JP 24854287 A JP24854287 A JP 24854287A JP S6490461 A JPS6490461 A JP S6490461A
Authority
JP
Japan
Prior art keywords
developing device
priority
toner concentration
image quality
succeeding
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
JP62248542A
Other languages
Japanese (ja)
Inventor
Yoshiaki Takano
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.)
Minolta Co Ltd
Original Assignee
Minolta 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 Minolta Co Ltd filed Critical Minolta Co Ltd
Priority to JP62248542A priority Critical patent/JPS6490461A/en
Priority to US07/250,150 priority patent/US4897690A/en
Publication of JPS6490461A publication Critical patent/JPS6490461A/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
    • G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
    • G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
    • 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
    • G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
    • G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
    • G03G15/0822—Arrangements for preparing, mixing, supplying or dispensing developer
    • G03G15/0848—Arrangements for testing or measuring developer properties or quality, e.g. charge, size, flowability
    • G03G15/0849—Detection or control means for the developer concentration
    • 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
    • G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
    • G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
    • G03G15/0822—Arrangements for preparing, mixing, supplying or dispensing developer
    • G03G15/0848—Arrangements for testing or measuring developer properties or quality, e.g. charge, size, flowability
    • G03G15/0849—Detection or control means for the developer concentration
    • G03G15/0853—Detection or control means for the developer concentration the concentration being measured by magnetic means

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Color Electrophotography (AREA)

Abstract

PURPOSE:To continuously maintain an image of proper image quality by providing plural developing devices with the priority level of selection and performing switching to the usage of a developing device with succeeding priority when a developing device with high priority is in an improper state. CONSTITUTION:A developing device 6 is a development type which uses powder consisting of toner and carriers and attachable/detachable to/from a copying machine main body. A toner concentration detection sensor AS2 which detects toner concentration as variation in magnetic permeability is provided on the bottom part of a conveyance path 64 and outputs the toner concentration to a CPU. The CPU decides an improper development state when the toner concentration is smaller than a reference value and performs the switching to a developing device with succeeding priority. Thus, the priority level is given to the mounted developing devices and developing device is switched according to the priority to obtain images having proper image quality continuously.
JP62248542A 1987-09-30 1987-09-30 Method for driving image forming device Pending JPS6490461A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP62248542A JPS6490461A (en) 1987-09-30 1987-09-30 Method for driving image forming device
US07/250,150 US4897690A (en) 1987-09-30 1988-09-28 Image forming apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62248542A JPS6490461A (en) 1987-09-30 1987-09-30 Method for driving image forming device

Publications (1)

Publication Number Publication Date
JPS6490461A true JPS6490461A (en) 1989-04-06

Family

ID=17179730

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62248542A Pending JPS6490461A (en) 1987-09-30 1987-09-30 Method for driving image forming device

Country Status (1)

Country Link
JP (1) JPS6490461A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5802634A (en) * 1995-04-21 1998-09-08 Aprica Kassai Kabushikikaisha Bed with height adjusting means, convertible from infant use to adult use

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5802634A (en) * 1995-04-21 1998-09-08 Aprica Kassai Kabushikikaisha Bed with height adjusting means, convertible from infant use to adult use

Similar Documents

Publication Publication Date Title
JPS6410279A (en) Developing device
JPS5345245A (en) Electrostatic latent image developing apparatus
JPS6490461A (en) Method for driving image forming device
JPS537241A (en) Transfer type copying machine for electrophotography
JPS5425830A (en) Image forming method in electrophotographic copiers and others
JPS5343530A (en) Developing method
JPS54126552A (en) Toner replenishing device for developing of copying machines and others
JPS6457282A (en) Image forming device
JPS6490460A (en) Method for driving image forming device
JPS5315834A (en) Surface potential stabilizing method and apparatus
JPS6490459A (en) Method for driving image forming device
JPS6435580A (en) Image forming device
JPS5252642A (en) Automatic color selection device
JPS5342738A (en) Developing device for electrostatic latent image
JPS5442150A (en) Copying machine
JPS5280845A (en) Electrophotographic copier
JPS56161556A (en) Method for controlling electrophotographic copying machine
JPS5359433A (en) Developing device for electrostatic latent image
JPS5218329A (en) The sensitive body cleaning device for the electrophotographic copying machine
JPS5776564A (en) Control system of copy surface image
JPS52153445A (en) Carrier removal device for electrostatic printer
JPS57136669A (en) Developer density controller
JPS52122132A (en) Toner image transfer device
JPS5357841A (en) Electrostatic image developing toner
JPS6476078A (en) Two-color electrophotographic device