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JPS561070A - Original pressure-contacting device of copying machine - Google Patents

Original pressure-contacting device of copying machine

Info

Publication number
JPS561070A
JPS561070A JP7578079A JP7578079A JPS561070A JP S561070 A JPS561070 A JP S561070A JP 7578079 A JP7578079 A JP 7578079A JP 7578079 A JP7578079 A JP 7578079A JP S561070 A JPS561070 A JP S561070A
Authority
JP
Japan
Prior art keywords
pressure plate
moments
inclination
springs
angle
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
JP7578079A
Other languages
Japanese (ja)
Inventor
Akira Hirose
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 JP7578079A priority Critical patent/JPS561070A/en
Publication of JPS561070A publication Critical patent/JPS561070A/en
Pending legal-status Critical Current

Links

Landscapes

  • Holders For Sensitive Materials And Originals (AREA)
  • Exposure Or Original Feeding In Electrophotography (AREA)

Abstract

PURPOSE: To let the pressure plate be stopped in a wide range of angle of inclination by using such plural springs which start acting at the different angles of inclination of the pressure plate.
CONSTITUTION: The angle of inclination of a pressure plate 24 is let θ, the moment by the own weight of the pressure plate M3 and the moments by springs 35, 36 are let moments M4, M5. Now, if the moment M is assumed to be axis of ordinate and the angle θ of inclination to be axis of abscissa, the moments M3, M4, M5 are expressed by curves F, G, H, respectively. Since the resistance force against turning of the pressure plate 24 is produced in the respective parts of the turning, the pressure plate 24 stops if the moments M by the elastic force of the springs are within the range enclosed by the curves I, J. The moments M by the elastic force of the springs are the composite of the moments M4, M5 by the springs 35, 36 and are indicated by the dotted line K. If the angle of inclination is above the angle θ5 of inclination corresponding to the point f of intersection of the dotted line K and curve I, it turns out that the pressure plate 24 stops.
COPYRIGHT: (C)1981,JPO&Japio
JP7578079A 1979-06-15 1979-06-15 Original pressure-contacting device of copying machine Pending JPS561070A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7578079A JPS561070A (en) 1979-06-15 1979-06-15 Original pressure-contacting device of copying machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7578079A JPS561070A (en) 1979-06-15 1979-06-15 Original pressure-contacting device of copying machine

Publications (1)

Publication Number Publication Date
JPS561070A true JPS561070A (en) 1981-01-08

Family

ID=13586065

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7578079A Pending JPS561070A (en) 1979-06-15 1979-06-15 Original pressure-contacting device of copying machine

Country Status (1)

Country Link
JP (1) JPS561070A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59153552U (en) * 1983-03-31 1984-10-15 京セラミタ株式会社 Copy machine original pressing device
JPH01245236A (en) * 1988-03-28 1989-09-29 Kato Electrical Mach Co Ltd Hinge device, opening and closing device of original press plate using it and spring retainer used therein
US4973472A (en) * 1988-12-26 1990-11-27 Senju Pharmaceutical Col., Ltd. Dental plaque inhibitor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59153552U (en) * 1983-03-31 1984-10-15 京セラミタ株式会社 Copy machine original pressing device
JPH01245236A (en) * 1988-03-28 1989-09-29 Kato Electrical Mach Co Ltd Hinge device, opening and closing device of original press plate using it and spring retainer used therein
US4973472A (en) * 1988-12-26 1990-11-27 Senju Pharmaceutical Col., Ltd. Dental plaque inhibitor

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