JPS5444524A - Electrostatic recorder - Google Patents

Electrostatic recorder

Info

Publication number
JPS5444524A
JPS5444524A JP11126877A JP11126877A JPS5444524A JP S5444524 A JPS5444524 A JP S5444524A JP 11126877 A JP11126877 A JP 11126877A JP 11126877 A JP11126877 A JP 11126877A JP S5444524 A JPS5444524 A JP S5444524A
Authority
JP
Japan
Prior art keywords
carrier
electric
resistor
abrasion
voltage
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
JP11126877A
Other languages
Japanese (ja)
Inventor
Takashi Ezaki
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.)
Ricoh Co Ltd
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 JP11126877A priority Critical patent/JPS5444524A/en
Publication of JPS5444524A publication Critical patent/JPS5444524A/en
Pending legal-status Critical Current

Links

Landscapes

  • Dot-Matrix Printers And Others (AREA)
  • Control Or Security For Electrophotography (AREA)

Abstract

PURPOSE: To automatically detect the abrasion of an electric sharge carrier and quantitatively determine it by detecting the impedance between the electric conductive body in contact with the face of the electric charge carrier and the electric conductive layer.
CONSTITUTION: Electric charge carrier body 1a bonded on electric conductive layer 1b is dielectric as well as resistor, hence the degree of abrasion can be detected by the change of its impedance. The impedance detection circuit comprises constant voltage circuit 11, comparation circuit 13, light emitting diode 14, and switching element 15 and the like, and the resistance of electric path from terminal 10 to conductive layer 1b via brush 9, roller 8, and carrier 1a is shown by resistor R1a. The output voltage of the constant voltage circuit 11 is applied to the carrier 1a via resistor R2. Voltage in proportion to the carrier 1a, namely, in proportion to the degree of abrasion appears at the terminal 10, and this voltage is compared with the comparison reference voltage determined by fixed resistor R3 and variable resistor R4. When it is less than the reference value, namely, abrasion reaches the set value, the light emitting diode 14 emits light to let it know.
COPYRIGHT: (C)1979,JPO&Japio
JP11126877A 1977-09-16 1977-09-16 Electrostatic recorder Pending JPS5444524A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11126877A JPS5444524A (en) 1977-09-16 1977-09-16 Electrostatic recorder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11126877A JPS5444524A (en) 1977-09-16 1977-09-16 Electrostatic recorder

Publications (1)

Publication Number Publication Date
JPS5444524A true JPS5444524A (en) 1979-04-09

Family

ID=14556890

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11126877A Pending JPS5444524A (en) 1977-09-16 1977-09-16 Electrostatic recorder

Country Status (1)

Country Link
JP (1) JPS5444524A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5761641U (en) * 1980-09-30 1982-04-12
JPS5799880A (en) * 1980-12-12 1982-06-21 Nippon Columbia Co Ltd Disc for recording and reproducing and recorder
JPS57150171A (en) * 1981-03-10 1982-09-16 Sanyo Electric Co Ltd Temporary stopping device for disc reproducer
JPS59186178A (en) * 1983-04-08 1984-10-22 Matsushita Electric Ind Co Ltd Random access device of clv disc
DE4228560A1 (en) * 1991-08-28 1993-03-11 Sharp Kk IMAGE GENERATION DEVICE

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5761641U (en) * 1980-09-30 1982-04-12
JPS615624Y2 (en) * 1980-09-30 1986-02-20
JPS5799880A (en) * 1980-12-12 1982-06-21 Nippon Columbia Co Ltd Disc for recording and reproducing and recorder
JPH0262994B2 (en) * 1980-12-12 1990-12-27 Nippon Columbia
JPS57150171A (en) * 1981-03-10 1982-09-16 Sanyo Electric Co Ltd Temporary stopping device for disc reproducer
JPS6252381B2 (en) * 1981-03-10 1987-11-05 Sanyo Electric Co
JPS59186178A (en) * 1983-04-08 1984-10-22 Matsushita Electric Ind Co Ltd Random access device of clv disc
DE4228560A1 (en) * 1991-08-28 1993-03-11 Sharp Kk IMAGE GENERATION DEVICE
DE4228560C2 (en) * 1991-08-28 1999-07-29 Sharp Kk Imaging device

Similar Documents

Publication Publication Date Title
GB2117909A (en) Device for locating objects behind surfaces
JPS5444524A (en) Electrostatic recorder
ATE86032T1 (en) SENSOR FOR A SOLVENT DETECTOR.
JPS5511225A (en) Printing density detector
JPS552932A (en) Air-fuel ratio detector
JPS6486054A (en) Operation of electrochemical battery for higher detection sensitivity of specified gas in mixed gas
GB1248283A (en) Inspection apparatus
JPS6474440A (en) Raindrop detecting device
JPS5624567A (en) Humidity measuring system
JPS593319A (en) Liquid level detector
JPS6469962A (en) Detecting apparatus of contact resistance
JPS5297090A (en) Disconnection and contact failure detector of detecting potentiometer in automatic control
JPS5552965A (en) Surface potentiometer
JPS5621748A (en) Contact detector
JPS6050303B2 (en) electrometer
JPS57177422A (en) Damage preventer for air bearing
JPS55146052A (en) Noise reduction circuit in noncontact type potentiometer
SU913067A1 (en) Photosensitive device
JPS54136360A (en) Element fixing terminal
JPS54110898A (en) Humidity detecting circuit
JPS5587957A (en) Voltage detection circuit
JPS5714756A (en) Holding current selector circuit
JPS57137865A (en) Method for detecting impedance of conductive path
JPS53107374A (en) Detecting circuit of alternating current voltage
JPS54118899A (en) Humidity detector