JPS55164844A - Copying apparatus having black-color pressure plate - Google Patents

Copying apparatus having black-color pressure plate

Info

Publication number
JPS55164844A
JPS55164844A JP7227879A JP7227879A JPS55164844A JP S55164844 A JPS55164844 A JP S55164844A JP 7227879 A JP7227879 A JP 7227879A JP 7227879 A JP7227879 A JP 7227879A JP S55164844 A JPS55164844 A JP S55164844A
Authority
JP
Japan
Prior art keywords
original
pressure
black
pressure plate
portions
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
JP7227879A
Other languages
Japanese (ja)
Inventor
Yoshio Maniwa
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 JP7227879A priority Critical patent/JPS55164844A/en
Publication of JPS55164844A publication Critical patent/JPS55164844A/en
Pending legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE:To enable the obtaining of good copies by detecting the size of the original area from the output signal of a means of converting light images to electric signals of a scanning read means and exposing the portions other than the original face as well as by providing a pressure plate of which the pressure contact surface is of a black color. CONSTITUTION:A scanning reader 10 which performs scanning and reading of data by making use of the light transmitted through the optical path of an exposure optical system, a synchronizing circuit, etc. are disposed in said optical system. A pressure plate 1 for fixing originals which has a black-color pressure-contact surface is used. As a result of this, if, for example, the original 0, is smaller than contact glass 2, the signal appearing in the reader 10 is generally white at the end of the original and therefore its level is high and the level of the portions off from the original 0 becomes low. By detecting the size of the original face and making the portions other than the same to a white level in this way, the staining of the pressure-contact surface is obviated from being copied.
JP7227879A 1979-06-11 1979-06-11 Copying apparatus having black-color pressure plate Pending JPS55164844A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7227879A JPS55164844A (en) 1979-06-11 1979-06-11 Copying apparatus having black-color pressure plate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7227879A JPS55164844A (en) 1979-06-11 1979-06-11 Copying apparatus having black-color pressure plate

Publications (1)

Publication Number Publication Date
JPS55164844A true JPS55164844A (en) 1980-12-22

Family

ID=13484652

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7227879A Pending JPS55164844A (en) 1979-06-11 1979-06-11 Copying apparatus having black-color pressure plate

Country Status (1)

Country Link
JP (1) JPS55164844A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6046576A (en) * 1983-08-25 1985-03-13 Canon Inc Image forming device
JPS616636A (en) * 1984-06-21 1986-01-13 Canon Inc Image processor
JPH02131662A (en) * 1988-11-11 1990-05-21 Fuji Xerox Co Ltd Original position detection processing system for picture processor
US7688477B2 (en) 2005-11-08 2010-03-30 Brother Kogyo Kabushiki Kaisha Image reading apparatus, and method for detecting size of document

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6046576A (en) * 1983-08-25 1985-03-13 Canon Inc Image forming device
JPS616636A (en) * 1984-06-21 1986-01-13 Canon Inc Image processor
JPH02131662A (en) * 1988-11-11 1990-05-21 Fuji Xerox Co Ltd Original position detection processing system for picture processor
US7688477B2 (en) 2005-11-08 2010-03-30 Brother Kogyo Kabushiki Kaisha Image reading apparatus, and method for detecting size of document

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