JPS5729457A - Method and device for electronic platemaking - Google Patents

Method and device for electronic platemaking

Info

Publication number
JPS5729457A
JPS5729457A JP10448580A JP10448580A JPS5729457A JP S5729457 A JPS5729457 A JP S5729457A JP 10448580 A JP10448580 A JP 10448580A JP 10448580 A JP10448580 A JP 10448580A JP S5729457 A JPS5729457 A JP S5729457A
Authority
JP
Japan
Prior art keywords
density
signal
original
zone
grade difference
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.)
Granted
Application number
JP10448580A
Other languages
Japanese (ja)
Other versions
JPH0424225B2 (en
Inventor
Masayuki Takei
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.)
Toppan Inc
Original Assignee
Toppan Printing 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 Toppan Printing Co Ltd filed Critical Toppan Printing Co Ltd
Priority to JP10448580A priority Critical patent/JPS5729457A/en
Priority to US06/285,916 priority patent/US4422101A/en
Priority to DE19813129649 priority patent/DE3129649A1/en
Publication of JPS5729457A publication Critical patent/JPS5729457A/en
Publication of JPH0424225B2 publication Critical patent/JPH0424225B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Preparing Plates And Mask In Photomechanical Process (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)

Abstract

PURPOSE: To eliminate the density grade difference in printing in spite of the density difference in an original, in an endless electronic processing apparatus by correcting the density signal of the other end by the density signal of the extention part of the original.
CONSTITUTION: The original is the picture continuing at a front end A and a rear end B. The same picture as on the AD zone is figured on the extention part BC zone of the rear end B. The density grade difference exists between A and B, but does not exist before and behind B. the density signal can be obtained by scanning L1WLn of this original, and the correction of the grade difference between A and B is made so as to correct the end A mainly due to the signal of the BC zone, making D point as 100% of D signal and correcting the density between those in proportion to the distance. By this means the density grade difference does not appear.
COPYRIGHT: (C)1982,JPO&Japio
JP10448580A 1980-07-30 1980-07-30 Method and device for electronic platemaking Granted JPS5729457A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP10448580A JPS5729457A (en) 1980-07-30 1980-07-30 Method and device for electronic platemaking
US06/285,916 US4422101A (en) 1980-07-30 1981-07-23 Electronic cylinder making method
DE19813129649 DE3129649A1 (en) 1980-07-30 1981-07-28 ELECTRONIC CYLINDER MANUFACTURING PROCESS

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10448580A JPS5729457A (en) 1980-07-30 1980-07-30 Method and device for electronic platemaking

Publications (2)

Publication Number Publication Date
JPS5729457A true JPS5729457A (en) 1982-02-17
JPH0424225B2 JPH0424225B2 (en) 1992-04-24

Family

ID=14381851

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10448580A Granted JPS5729457A (en) 1980-07-30 1980-07-30 Method and device for electronic platemaking

Country Status (1)

Country Link
JP (1) JPS5729457A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS638743A (en) * 1986-06-30 1988-01-14 Dainippon Printing Co Ltd Generating method for negative for endless plate
JPS638744A (en) * 1986-06-30 1988-01-14 Dainippon Printing Co Ltd How to create a film master plate for endless plates
US5481366A (en) * 1992-09-14 1996-01-02 Dainippon Screen Mfg. Co., Ltd. Method of and apparatus for producing a unit pattern on a printing cylinder for printing an endless pattern

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS638743A (en) * 1986-06-30 1988-01-14 Dainippon Printing Co Ltd Generating method for negative for endless plate
JPS638744A (en) * 1986-06-30 1988-01-14 Dainippon Printing Co Ltd How to create a film master plate for endless plates
US5481366A (en) * 1992-09-14 1996-01-02 Dainippon Screen Mfg. Co., Ltd. Method of and apparatus for producing a unit pattern on a printing cylinder for printing an endless pattern

Also Published As

Publication number Publication date
JPH0424225B2 (en) 1992-04-24

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