JPS63177176A - Image forming device - Google Patents

Image forming device

Info

Publication number
JPS63177176A
JPS63177176A JP956187A JP956187A JPS63177176A JP S63177176 A JPS63177176 A JP S63177176A JP 956187 A JP956187 A JP 956187A JP 956187 A JP956187 A JP 956187A JP S63177176 A JPS63177176 A JP S63177176A
Authority
JP
Grant status
Application
Patent type
Prior art keywords
image
sensor
condition
density
humidity
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
JP956187A
Other versions
JP2808107B2 (en )
Inventor
Tadashi Ishikawa
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

Links

Abstract

PURPOSE:To form an image with invariably optimum density by setting image formation condition which determines image density according to the detection result of an environment detecting means and the kind of a developer. CONSTITUTION:The environment sensor 19 consisting of a humidity sensor and a temperature sensor is arranged at the position where the moisture absorption of toner is well reflected, e.g. nearby a toner hopper or developing device, and a control means 18 is connected to the environment sensor 19 and a potential sensor 20. The density decreases under one and the same condition as humidity is low and increases as the humidity increases. For the purpose, a contrast potential Vcont is found by detecting the humidity and the image formation condition is set according to the value, thereby obtaining a stable image regardless of variation in environmental condition. Further, the image formation condition is set at every color and then even a difference in image density due to a difference among the colors of developer is corrected.
JP956187A 1987-01-19 1987-01-19 Image forming apparatus Expired - Lifetime JP2808107B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP956187A JP2808107B2 (en) 1987-01-19 1987-01-19 Image forming apparatus

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP956187A JP2808107B2 (en) 1987-01-19 1987-01-19 Image forming apparatus
DE19883879722 DE3879722T2 (en) 1987-01-19 1988-01-18 Imaging device.
EP19880300378 EP0276112B1 (en) 1987-01-19 1988-01-18 An image forming apparatus
DE19883879722 DE3879722D1 (en) 1987-01-19 1988-01-18 Imaging device.
US07145600 US4888618A (en) 1987-01-19 1988-01-19 Image forming apparatus having ambient condition detecting means

Publications (2)

Publication Number Publication Date
JPS63177176A true true JPS63177176A (en) 1988-07-21
JP2808107B2 JP2808107B2 (en) 1998-10-08

Family

ID=11723700

Family Applications (1)

Application Number Title Priority Date Filing Date
JP956187A Expired - Lifetime JP2808107B2 (en) 1987-01-19 1987-01-19 Image forming apparatus

Country Status (1)

Country Link
JP (1) JP2808107B2 (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0229053U (en) * 1988-08-11 1990-02-23
US5682573A (en) * 1995-03-01 1997-10-28 Fuji Xerox Co., Ltd. Image quality control in image forming apparatus
US5729786A (en) * 1994-09-13 1998-03-17 Fuji Xerox Co., Ltd. Image forming control apparatus which retreives control rules via control cases stored in control clusters
US5734407A (en) * 1995-03-31 1998-03-31 Fuji Xerox Co., Ltd. Image quality control at restart of image forming apparatus
US5887223A (en) * 1996-08-13 1999-03-23 Fuji Xerox Co., Ltd. Image forming apparatus having high image quality control mechanism
US6122075A (en) * 1996-10-28 2000-09-19 Fuji Xerox Co., Ltd. Image forming apparatus
EP1254774A1 (en) * 2001-04-30 2002-11-06 Hewlett-Packard Company Environmental factor detection system for inkjet printing
GB2486064A (en) * 2010-11-30 2012-06-06 Canon Kk Image forming apparatus

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5484741A (en) * 1977-12-19 1979-07-05 Ricoh Co Ltd Toner density controlling method and device for copier
JPS58217960A (en) * 1982-06-11 1983-12-19 Canon Inc Image forming device
JPS597383A (en) * 1982-07-02 1984-01-14 Ricoh Co Ltd Controlling method of developing process in image recorder

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5484741A (en) * 1977-12-19 1979-07-05 Ricoh Co Ltd Toner density controlling method and device for copier
JPS58217960A (en) * 1982-06-11 1983-12-19 Canon Inc Image forming device
JPS597383A (en) * 1982-07-02 1984-01-14 Ricoh Co Ltd Controlling method of developing process in image recorder

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0229053U (en) * 1988-08-11 1990-02-23
US5729786A (en) * 1994-09-13 1998-03-17 Fuji Xerox Co., Ltd. Image forming control apparatus which retreives control rules via control cases stored in control clusters
US5682573A (en) * 1995-03-01 1997-10-28 Fuji Xerox Co., Ltd. Image quality control in image forming apparatus
US5734407A (en) * 1995-03-31 1998-03-31 Fuji Xerox Co., Ltd. Image quality control at restart of image forming apparatus
US5887223A (en) * 1996-08-13 1999-03-23 Fuji Xerox Co., Ltd. Image forming apparatus having high image quality control mechanism
US6122075A (en) * 1996-10-28 2000-09-19 Fuji Xerox Co., Ltd. Image forming apparatus
EP1254774A1 (en) * 2001-04-30 2002-11-06 Hewlett-Packard Company Environmental factor detection system for inkjet printing
US6568780B2 (en) 2001-04-30 2003-05-27 Hewlett-Packard Company Environmental factor detection system for inkjet printing
GB2486064A (en) * 2010-11-30 2012-06-06 Canon Kk Image forming apparatus
GB2486064B (en) * 2010-11-30 2013-03-06 Canon Kk Image forming apparatus
US8712263B2 (en) 2010-11-30 2014-04-29 Canon Kabushiki Kaisha Image forming apparatus
US9152114B2 (en) 2010-11-30 2015-10-06 Canon Kabushiki Kaisha Image forming apparatus

Also Published As

Publication number Publication date Type
JP2808107B2 (en) 1998-10-08 grant

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Legal Events

Date Code Title Description
EXPY Cancellation because of completion of term