JPS5529869A - Electrostatic recorder - Google Patents

Electrostatic recorder

Info

Publication number
JPS5529869A
JPS5529869A JP10304978A JP10304978A JPS5529869A JP S5529869 A JPS5529869 A JP S5529869A JP 10304978 A JP10304978 A JP 10304978A JP 10304978 A JP10304978 A JP 10304978A JP S5529869 A JPS5529869 A JP S5529869A
Authority
JP
Japan
Prior art keywords
voltage
surface potential
circuit
recording medium
images
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
JP10304978A
Other languages
Japanese (ja)
Inventor
Koji Suzuki
Yoshikazu Yokomizo
Yoshitaka Kawamo
Shinkichi Takahashi
Hiroaki Tsuchiya
Shinichi Iwasaki
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.)
Canon Inc
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 JP10304978A priority Critical patent/JPS5529869A/en
Publication of JPS5529869A publication Critical patent/JPS5529869A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To prevent the formation of unstable recording images by announcing the degradation of a recording medium by the surface potential detection output on the recording medium.
CONSTITUTION: When a sensor motor driving signal inputs to terminal 1, a control circuit CT1 operates to run a copper 83 by means of a sensor motor 82, whereby the AC voltage of the amplitude prportional to the absolute value of the surface potentials of a recording medium 47 is obtained. This voltage goes through an amplifier circuit CT2 and a synchronous clamping circuit CT4 and is made to a DC voltage in a smoothing circuit CT5. This voltage then inputs the respective holding circuits CTs 7,8,9 of the standard bright part surface potential vL, bright part surface potential VL and dard part surface potential VD. The output of the CT7 outputs to terminal 2 and the outputs of the CTs 8,9 input to a display circuit CT10, where they are compared with the output of the CT2. When the surface potential contrast voltage (VD-VL) is below the specified value, the LEDs 7,8 are lighted to announce that the stable images are unobtainable. Hence, the formation of unstable images is prevented.
COPYRIGHT: (C)1980,JPO&Japio
JP10304978A 1978-08-24 1978-08-24 Electrostatic recorder Pending JPS5529869A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10304978A JPS5529869A (en) 1978-08-24 1978-08-24 Electrostatic recorder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10304978A JPS5529869A (en) 1978-08-24 1978-08-24 Electrostatic recorder

Publications (1)

Publication Number Publication Date
JPS5529869A true JPS5529869A (en) 1980-03-03

Family

ID=14343805

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10304978A Pending JPS5529869A (en) 1978-08-24 1978-08-24 Electrostatic recorder

Country Status (1)

Country Link
JP (1) JPS5529869A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60120766U (en) * 1984-01-24 1985-08-15 三共理化学株式会社 Polymerized polished vane wheels
US5206686A (en) * 1990-03-20 1993-04-27 Minolta Camera Kabushiki Kaisha Apparatus for forming an image with use of electrophotographic process including gradation correction
US5343235A (en) * 1990-03-20 1994-08-30 Minolta Camera Kabushiki Kaisha Apparatus and method for forming an image including correction for laser beam size
US5585927A (en) * 1992-05-19 1996-12-17 Minolta Camera Kabushiki Kaisha Digital image forming apparatus having gradation characteristic setting means
US6008911A (en) * 1992-05-19 1999-12-28 Minolta Co., Ltd. Digital image forming apparatus

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52142518A (en) * 1976-05-22 1977-11-28 Ricoh Co Ltd Data indicator for copying machine
JPS5393030A (en) * 1977-01-27 1978-08-15 Ricoh Co Ltd Copying process control method of electrophotographic copying machine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52142518A (en) * 1976-05-22 1977-11-28 Ricoh Co Ltd Data indicator for copying machine
JPS5393030A (en) * 1977-01-27 1978-08-15 Ricoh Co Ltd Copying process control method of electrophotographic copying machine

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60120766U (en) * 1984-01-24 1985-08-15 三共理化学株式会社 Polymerized polished vane wheels
US5206686A (en) * 1990-03-20 1993-04-27 Minolta Camera Kabushiki Kaisha Apparatus for forming an image with use of electrophotographic process including gradation correction
US5343235A (en) * 1990-03-20 1994-08-30 Minolta Camera Kabushiki Kaisha Apparatus and method for forming an image including correction for laser beam size
US5585927A (en) * 1992-05-19 1996-12-17 Minolta Camera Kabushiki Kaisha Digital image forming apparatus having gradation characteristic setting means
US6008911A (en) * 1992-05-19 1999-12-28 Minolta Co., Ltd. Digital image forming apparatus

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