JPS5569171A - Exposure part protective device of cathode ray tube in electrophotographic apparatus - Google Patents

Exposure part protective device of cathode ray tube in electrophotographic apparatus

Info

Publication number
JPS5569171A
JPS5569171A JP14206278A JP14206278A JPS5569171A JP S5569171 A JPS5569171 A JP S5569171A JP 14206278 A JP14206278 A JP 14206278A JP 14206278 A JP14206278 A JP 14206278A JP S5569171 A JPS5569171 A JP S5569171A
Authority
JP
Japan
Prior art keywords
ray tube
cathode ray
electrophotographic apparatus
type light
light transmitter
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
JP14206278A
Other languages
Japanese (ja)
Inventor
Toshibumi Kato
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 JP14206278A priority Critical patent/JPS5569171A/en
Publication of JPS5569171A publication Critical patent/JPS5569171A/en
Pending legal-status Critical Current

Links

Landscapes

  • Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
  • Exposure Or Original Feeding In Electrophotography (AREA)
  • Projection-Type Copiers In General (AREA)

Abstract

PURPOSE: To prevent drop of light transmittance of focusing type light transmitter, by wrapping the surface of the focusing type light transmitter of cathode ray tube exposure part with a cover which opens only when operating, in an electrophotographic apparatus possessing two exposure means of optical system and cathode ray tube system.
CONSTITUTION: In an electrophotographic apparatus having two exposure means of the optical system intended to image and expose on a photosensitive drum 1 and cathode ray tube system, the surface of a focusing type light transmitter 51 of cathode ray tube 5 is wrapped with a covering member 54 which opens only when operating That is, while the cathode ray tube 5 is not operating, a lever 55 is pulled by a spring 57 and turns downwards, so that a shutter plate 54 closes a window hole 53 in the front of a cover 52. Accordingly, floating toner particles in optical copying operation do not deposit on the surface of the focusing type light transmitter 51. When the cathode ray tube 5 operates, a solenoid 56 is excited, and the lever 55 is pulled up, then the shutter plate 54 opens the front window hole 53.
COPYRIGHT: (C)1980,JPO&Japio
JP14206278A 1978-11-17 1978-11-17 Exposure part protective device of cathode ray tube in electrophotographic apparatus Pending JPS5569171A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14206278A JPS5569171A (en) 1978-11-17 1978-11-17 Exposure part protective device of cathode ray tube in electrophotographic apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14206278A JPS5569171A (en) 1978-11-17 1978-11-17 Exposure part protective device of cathode ray tube in electrophotographic apparatus

Publications (1)

Publication Number Publication Date
JPS5569171A true JPS5569171A (en) 1980-05-24

Family

ID=15306532

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14206278A Pending JPS5569171A (en) 1978-11-17 1978-11-17 Exposure part protective device of cathode ray tube in electrophotographic apparatus

Country Status (1)

Country Link
JP (1) JPS5569171A (en)

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