JPS5677863A - Copying machine provided with automatic mask device - Google Patents

Copying machine provided with automatic mask device

Info

Publication number
JPS5677863A
JPS5677863A JP15507379A JP15507379A JPS5677863A JP S5677863 A JPS5677863 A JP S5677863A JP 15507379 A JP15507379 A JP 15507379A JP 15507379 A JP15507379 A JP 15507379A JP S5677863 A JPS5677863 A JP S5677863A
Authority
JP
Japan
Prior art keywords
original
size
circuit
copying machine
pulse signals
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
JP15507379A
Other languages
Japanese (ja)
Inventor
Hiroaki Ueno
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 JP15507379A priority Critical patent/JPS5677863A/en
Publication of JPS5677863A publication Critical patent/JPS5677863A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To enable an original size to be easily detected by automatically masking a contact glass on its under surface side, and detecting the original size by utilizing the moving time of mask plates.
CONSTITUTION: An original size detecting circuit 2, which consists of an AND circuit 27, and a counter 28, counts the pulse signals of a fixed frequency only while a mask plate drive control unit 22 is moving the 1st mask plate forward from its home position, to detect the size of the original. More specifically, the pulse signals Sp of a fixed frequency fed from a copying machine control part 21 and the Q signal (a) of an FF26 of a motor control circuit 23 are inputted to the AND circuit 27, and only while the signal (a) is being outputted from the FF26, the pulse signals Sp pass through an AND circuit 27 and since the pulse number of the signals Sp corresponds to the size of the original, a counter 28 counts this pulse number, enabling the size of the original to be detected.
COPYRIGHT: (C)1981,JPO&Japio
JP15507379A 1979-11-30 1979-11-30 Copying machine provided with automatic mask device Pending JPS5677863A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15507379A JPS5677863A (en) 1979-11-30 1979-11-30 Copying machine provided with automatic mask device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15507379A JPS5677863A (en) 1979-11-30 1979-11-30 Copying machine provided with automatic mask device

Publications (1)

Publication Number Publication Date
JPS5677863A true JPS5677863A (en) 1981-06-26

Family

ID=15598055

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15507379A Pending JPS5677863A (en) 1979-11-30 1979-11-30 Copying machine provided with automatic mask device

Country Status (1)

Country Link
JP (1) JPS5677863A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60260940A (en) * 1984-06-08 1985-12-24 Fuji Xerox Co Ltd Device for automatically detecting size of original
JPS619639A (en) * 1984-06-26 1986-01-17 Fuji Xerox Co Ltd Light shielding device for copying device
JPS61210343A (en) * 1985-03-15 1986-09-18 Fuji Xerox Co Ltd Automatic original size detector for copying machine
JPS61188142U (en) * 1985-05-14 1986-11-22
JPS61203741U (en) * 1985-06-11 1986-12-22

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60260940A (en) * 1984-06-08 1985-12-24 Fuji Xerox Co Ltd Device for automatically detecting size of original
JPS619639A (en) * 1984-06-26 1986-01-17 Fuji Xerox Co Ltd Light shielding device for copying device
JPS61210343A (en) * 1985-03-15 1986-09-18 Fuji Xerox Co Ltd Automatic original size detector for copying machine
JPS61188142U (en) * 1985-05-14 1986-11-22
JPS61203741U (en) * 1985-06-11 1986-12-22

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