JPS6095576A - Transfer device of copying machine - Google Patents

Transfer device of copying machine

Info

Publication number
JPS6095576A
JPS6095576A JP20441183A JP20441183A JPS6095576A JP S6095576 A JPS6095576 A JP S6095576A JP 20441183 A JP20441183 A JP 20441183A JP 20441183 A JP20441183 A JP 20441183A JP S6095576 A JPS6095576 A JP S6095576A
Authority
JP
Japan
Prior art keywords
transfer
image
toner
electrifier
polarity
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
JP20441183A
Other languages
Japanese (ja)
Inventor
Norio Kajiwara
Toyoji Ishikawa
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 JP20441183A priority Critical patent/JPS6095576A/en
Publication of JPS6095576A publication Critical patent/JPS6095576A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00Apparatus for electrographic processes using a charge pattern
    • G03G15/14Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base
    • G03G15/16Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer
    • G03G15/163Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer using the force produced by an electrostatic transfer field formed between the second base and the electrographic recording member, e.g. transfer through an air gap
    • G03G15/1635Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer using the force produced by an electrostatic transfer field formed between the second base and the electrographic recording member, e.g. transfer through an air gap the field being produced by laying down an electrostatic charge behind the base or the recording member, e.g. by a corona device
    • G03G15/1645Arrangements for controlling the amount of charge

Abstract

PURPOSE:To prevent a belt from being stained by controlling an electrifier for transfer so that a toner image on a photosensitive body is not transferred in a no-image area and transferred only in an image area. CONSTITUTION:A latent image on the 1st photosensitive drum 4 is held at a positive (or negative) potential, the polarity of toner is made negative (or positive), and the corona polarity of a belt electrifier (pre-electrifier) 29 is made negative (or positive); and the electrifier 30 for transfer is turned off in a no- image area and its polarity is made positive (or negative) in an image area to prevent developing toner of a reference density pattern as an unknown toner image from sticking on the transfer belt 27. Namely, the corona polarity of the belt electrifier 29 is held under specific condition according to, for example, the potential of the latent image ang toner polarity, and the transfer charger 30 is turned on in the no-image area and turned on in the image area to transfer the toner image on the photosensitive drum 4 to transfer paper 41. Thus, an unnecessary toner image 42 (reference density pattern image, etc.) is prevented from sticking on the transfer belt 27.
JP20441183A 1983-10-31 1983-10-31 Transfer device of copying machine Pending JPS6095576A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20441183A JPS6095576A (en) 1983-10-31 1983-10-31 Transfer device of copying machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20441183A JPS6095576A (en) 1983-10-31 1983-10-31 Transfer device of copying machine

Publications (1)

Publication Number Publication Date
JPS6095576A true JPS6095576A (en) 1985-05-28

Family

ID=16490095

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20441183A Pending JPS6095576A (en) 1983-10-31 1983-10-31 Transfer device of copying machine

Country Status (1)

Country Link
JP (1) JPS6095576A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01234874A (en) * 1988-03-15 1989-09-20 Bando Chem Ind Ltd Transferring and conveying device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01234874A (en) * 1988-03-15 1989-09-20 Bando Chem Ind Ltd Transferring and conveying device

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