JPH02264278A - Image forming device - Google Patents

Image forming device

Info

Publication number
JPH02264278A
JPH02264278A JP1085189A JP8518989A JPH02264278A JP H02264278 A JPH02264278 A JP H02264278A JP 1085189 A JP1085189 A JP 1085189A JP 8518989 A JP8518989 A JP 8518989A JP H02264278 A JPH02264278 A JP H02264278A
Authority
JP
Japan
Prior art keywords
transfer
voltage
paper
image area
photosensitive
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.)
Granted
Application number
JP1085189A
Other languages
Japanese (ja)
Other versions
JP2614309B2 (en
Inventor
Junji Araya
Koichi Hiroshima
Tatsunori Ishiyama
Kimio Nakahata
Yukihiro Ozeki
Koji Sato
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP1085189A priority Critical patent/JP2614309B2/en
Priority claimed from US07/500,795 external-priority patent/US5179397A/en
Priority claimed from CN 90101841 external-priority patent/CN1032034C/en
Publication of JPH02264278A publication Critical patent/JPH02264278A/en
Application granted granted Critical
Publication of JP2614309B2 publication Critical patent/JP2614309B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Abstract

PURPOSE: To stably obtain satisfactory transfer properties by controlling the constant current of a transfer means according to a prescribed current value when a transfer part stays in a non-image area and controlling the constant voltage of the transfer means according to a bias obtained by multiplying the previous voltage value by a specific coefficient when the transfer part stays in an image area.
CONSTITUTION: In receiving a transfer-on signal, a power source 4 controls the constant current of a transfer roll 2 when a photosensitive body 1 shows the non-image area when it comes to the transfer position, that is, no paper is fed. A CPU 8 stores a voltage V1 generated in the transfer roll 2 any time when no paper is fed. Conversely, when the photosensitive body 1 shows the image area when it comes to the transfer position, that is, when paper is fed, the CPU 8 controls the constant voltage of the transfer roll 2 according to a voltage V2 obtained by multiplying the voltage V1 by the coefficient R (R > 1), and transfers a toner image on the photosensitive body onto transfer paper. Consequently, under any environments stable transfer properties can always be obtained irrespective of the variation of the size of transfer material.
COPYRIGHT: (C)1990,JPO&Japio
JP1085189A 1989-04-03 1989-04-03 Image forming device Expired - Lifetime JP2614309B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1085189A JP2614309B2 (en) 1989-04-03 1989-04-03 Image forming device

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
JP1085189A JP2614309B2 (en) 1989-04-03 1989-04-03 Image forming device
US07/500,795 US5179397A (en) 1989-04-03 1990-03-28 Image forming apparatus with constant voltage and constant current control
DE1990620770 DE69020770T2 (en) 1989-04-03 1990-04-02 Imaging device.
ES90106276T ES2074097T3 (en) 1989-04-03 1990-04-02 Apparatus for the formation of images.
EP19900106276 EP0391306B1 (en) 1989-04-03 1990-04-02 An image forming apparatus
KR9004592A KR930010873B1 (en) 1989-04-03 1990-04-03 Image forming apparatus
CN 90101841 CN1032034C (en) 1989-04-03 1990-04-03 Picture forming apparatus

Publications (2)

Publication Number Publication Date
JPH02264278A true JPH02264278A (en) 1990-10-29
JP2614309B2 JP2614309B2 (en) 1997-05-28

Family

ID=13851711

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1085189A Expired - Lifetime JP2614309B2 (en) 1989-04-03 1989-04-03 Image forming device

Country Status (1)

Country Link
JP (1) JP2614309B2 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5436701A (en) * 1992-06-19 1995-07-25 Canon Kabushiki Kaisha Image forming method, image forming apparatus and apparatus unit
JP2003057969A (en) * 2001-08-09 2003-02-28 Canon Inc Image forming device
US7031624B2 (en) 2002-10-21 2006-04-18 Canon Kabushiki Kaisha Image formation apparatus for providing a predetermined temperature lowering period in which the temperature of a fixing unit is reduced
US7684717B2 (en) 2006-02-28 2010-03-23 Kabushiki Kaisha Toshiba Image forming apparatus and image forming method
JP2010191276A (en) * 2009-02-19 2010-09-02 Canon Inc Image forming apparatus
US8107834B2 (en) 2006-04-19 2012-01-31 Kabushiki Kaisha Toshiba Image forming apparatus and control method for the same
US8200109B2 (en) 2008-09-08 2012-06-12 Canon Kabushiki Kaisha Image forming apparatus

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4227446B2 (en) * 2003-03-27 2009-02-18 キヤノン株式会社 Image forming apparatus

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5436701A (en) * 1992-06-19 1995-07-25 Canon Kabushiki Kaisha Image forming method, image forming apparatus and apparatus unit
JP2003057969A (en) * 2001-08-09 2003-02-28 Canon Inc Image forming device
US7031624B2 (en) 2002-10-21 2006-04-18 Canon Kabushiki Kaisha Image formation apparatus for providing a predetermined temperature lowering period in which the temperature of a fixing unit is reduced
CN100338536C (en) * 2002-10-21 2007-09-19 佳能株式会社 Image forming device
US7684717B2 (en) 2006-02-28 2010-03-23 Kabushiki Kaisha Toshiba Image forming apparatus and image forming method
US8107834B2 (en) 2006-04-19 2012-01-31 Kabushiki Kaisha Toshiba Image forming apparatus and control method for the same
US8200109B2 (en) 2008-09-08 2012-06-12 Canon Kabushiki Kaisha Image forming apparatus
JP2010191276A (en) * 2009-02-19 2010-09-02 Canon Inc Image forming apparatus

Also Published As

Publication number Publication date
JP2614309B2 (en) 1997-05-28

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