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Volume 34, Issue 1
Displaying 1-8 of 8 articles from this issue
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Recent Tecnologies for High Speed PressesMasakazu AKATSUKA, Hitoshi ISONO, Takao HARADA1997 Volume 34 Issue 1 Pages 2-6
Published: January 31, 1997
Released on J-STAGE: September 27, 2010
JOURNAL FREE ACCESSProductivity is the most important issue for printing process in competing and in living together with other information media. Variety of technologies have been applied for the press to print products with high quality, in less cost, and in shorter lead time. They serve not only for increasing press speed but for stabilizing press operation to get full benefits of each automated parts. This is especially the case in high speed operation where many hidden problems easily appear. This paper describes problems and solutions in conjunction with this high speed and stable operation of the sheet fed offset press and commercial web offset press. They are classified in three groups, problems due to increased top speed, ones due to extended speed range, and ones due to others, with brief explanation and analyses.View full abstractDownload PDF (1768K) -
Print Quality Monitoring SystemMasahiro NAKAZATO, Masataka SUGIYAMA, Mitsuhiko IIDA1997 Volume 34 Issue 1 Pages 7-12
Published: January 31, 1997
Released on J-STAGE: September 27, 2010
JOURNAL FREE ACCESSAbout ten years passed since the first print quality monitoring system was introduced. At present, there are many monitoring method in the system, however, the current system monitors print quality after printing but after folding. The future direction of the system would be seen as more integration with other system of inspection.View full abstractDownload PDF (1927K) -
Tower Type Printing MachineryHaruyoshi KOBAYASHI1997 Volume 34 Issue 1 Pages 13-18
Published: January 31, 1997
Released on J-STAGE: September 27, 2010
JOURNAL FREE ACCESSThe history of birth of TOWER PRESS, for satisfying more-color demand at recent newspaper industry, through practical development on the basis of accumulated past technology and the future forecast of newspaper printing technology including TOWER PRESS.View full abstractDownload PDF (1946K) -
CTP and Printing PressesTakeshi YOSHIKAWA1997 Volume 34 Issue 1 Pages 19-23
Published: January 31, 1997
Released on J-STAGE: September 27, 2010
JOURNAL FREE ACCESSCurrently, digitalization of printing industry has been accelerated by computer innovations. The automated printing presses, Computer-To-Plate/Paper/Press systems and relative computerized systems are being used everywhere in this industry. Each system has possibility to improve problems of present work flow however it is making new difficult problems.View full abstractDownload PDF (2762K) -
Development of Rotogravure Printing PressTakashi KOBAYASHI1997 Volume 34 Issue 1 Pages 24-30
Published: January 31, 1997
Released on J-STAGE: September 27, 2010
JOURNAL FREE ACCESSRotogravure printing press were started to be induced to Japanese printers around 1921 and thereafter, have been increased in supplied quantity with the developments in plastic film. With old printing presses, web tension is grauged by hand patting on web, color registrations checked by eyes at every printing station, and color matching done by experienced specialist only. Now a days, two directional color register controller, stress free tension control system and automatic unrewind & rewind splicers have been developed for stable and continuous printing in the industry. Further automation and digital control system will be accelated in the industry as counter measures against 3-K jobs (kiken, kitanai & kitsui or Danger, Dirty & Hard), employmental restructure and craftmanships.View full abstractDownload PDF (1995K) -
Masao Aizu, Mikio Takagi1997 Volume 34 Issue 1 Pages 31-39
Published: January 31, 1997
Released on J-STAGE: September 27, 2010
JOURNAL FREE ACCESSA segmentation-based image coding method and its application to prepress image processing to the compressed data is described. The segmentation method used here is composed of color space conversion to L* u* v* and its mapping to a characteristic space of a ellips curvature derived by the consideration on color data distribution model, and two stages of execution of ISODATA, a well known clustering technique. At the end of this process, one can get a label image that is composed of eight-bit region numbers corresponding to each location of pixel. At the stage of coding, each region is independently coded by means of three-dimensional VQ (Vector Quantization) whose components are (L* u* v*).View full abstractDownload PDF (2439K) -
Objective Evaluation by Synthetic MeasureHiromichi MISHINA1997 Volume 34 Issue 1 Pages 41-45
Published: January 31, 1997
Released on J-STAGE: September 27, 2010
JOURNAL FREE ACCESSThe previous report treated analytical and statistical measure for image evaluation. This paper shows the synthetic measure by combined subjective and objective evaluation. The measure can be used for design of the imaging device. The new concept of term independent evaluation space of image is also suggested.View full abstractDownload PDF (1455K) -
1. IntroductionHideo SASAKI1997 Volume 34 Issue 1 Pages 46-53
Published: January 31, 1997
Released on J-STAGE: September 27, 2010
JOURNAL FREE ACCESSThe first chapter of the introductory series lecture on the surface analytical techonolgy is presented. Needs for the surface analysis in a printing company, the basic terms essential to understand this field, the principles of the interaction between probe and surface atom, the preparation of specimen and some points to be noted to carry out the surface analysis are explained.View full abstractDownload PDF (3322K)
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