JPS57164742A - Image forming apparatus - Google Patents

Image forming apparatus

Info

Publication number
JPS57164742A
JPS57164742A JP56050748A JP5074881A JPS57164742A JP S57164742 A JPS57164742 A JP S57164742A JP 56050748 A JP56050748 A JP 56050748A JP 5074881 A JP5074881 A JP 5074881A JP S57164742 A JPS57164742 A JP S57164742A
Authority
JP
Japan
Prior art keywords
jamming
sensor
charger
separation
drum
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
JP56050748A
Other languages
Japanese (ja)
Inventor
Hidemi Egami
Toshiaki Yagasaki
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 JP56050748A priority Critical patent/JPS57164742A/en
Publication of JPS57164742A publication Critical patent/JPS57164742A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/70—Detecting malfunctions relating to paper handling, e.g. jams
    • G03G15/706—Detecting missed stripping form xerographic drum, band or plate

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Control Or Security For Electrophotography (AREA)

Abstract

PURPOSE:To ensure judgment of jamming or the like with a simple structure, by controlling temperature of a photosensitive drum or the like to be detected in accordance with temperature detection output, and judging the surrounding and the like state of the drum. CONSTITUTION:Temperature sensors 9a, 9b are provided on the downstream side of a separation charger for separating a copying paper 8 with an image transferred from a photosensitive drum 1, and between a cleaner 7 and a charger 2. Drift due to light is prevented by controlling the internal heater of the drum 1 in accordance with an environmental condition. On the other hand, when trouble in separation of the paper 8, jamming, etc. due to the charger 6 occurs, temperatures near the sensor 9a changes, thus permitting separation trouble, jamming, etc. to be securely discriminated with a simple structure by comparing the output of the sensor 9a with that of the sensor 9b as a reference output.
JP56050748A 1981-04-03 1981-04-03 Image forming apparatus Pending JPS57164742A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56050748A JPS57164742A (en) 1981-04-03 1981-04-03 Image forming apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56050748A JPS57164742A (en) 1981-04-03 1981-04-03 Image forming apparatus

Publications (1)

Publication Number Publication Date
JPS57164742A true JPS57164742A (en) 1982-10-09

Family

ID=12867449

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56050748A Pending JPS57164742A (en) 1981-04-03 1981-04-03 Image forming apparatus

Country Status (1)

Country Link
JP (1) JPS57164742A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62115471A (en) * 1985-11-14 1987-05-27 Sharp Corp Abnormality detector for image forming device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62115471A (en) * 1985-11-14 1987-05-27 Sharp Corp Abnormality detector for image forming device

Similar Documents

Publication Publication Date Title
JPS54143144A (en) Image density detecting method and apparatus for zerographic copier
JPS56146155A (en) Electrostatic copying machine
JPS57122305A (en) Detection of thickness of sheet-shaped object
JPS64983A (en) Toner recovering device
JPS57164742A (en) Image forming apparatus
JPS5639555A (en) Original discrimination method
JPS57139765A (en) Jam detector of copying machine
JPS57210355A (en) Image recording device
JPS5678849A (en) Original size detector
JPS53101428A (en) Detector for mis-separation of transfer for electrophotographic copier
JPS57161754A (en) Safety device using temperature detecting means
JPS5528079A (en) Automatic variable magnification copier
JPS5539047A (en) Detection of advancing speed of recording element
JPS5553359A (en) Image forming device
JPS57182727A (en) Original size detecting device for copying machine or the like
JPS561971A (en) Photoreceptor fatigue degree detection in copying machine
JPS57109968A (en) Method for detecting transfer material using temperature sensor
JPS5735877A (en) Automatic original feeder
JPS57124377A (en) Detecting method for overlapped transfer paper delivery
JPS5652764A (en) Photosensor for detecting fatigue of photoreceptor
JPS56164353A (en) Image density detector of electrophotographic copying machine
JPS57154271A (en) Detecting part for wrapping of medium to be recorded of electrophotographic copier
JPS6462671A (en) Electrophotographic device
JPS57144571A (en) Double feed detector
JPS55119644A (en) Detection system for excess-feed of copy paper