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Volume 50 (2013)
- Issue 6 Pages 458-
- Issue 5 Pages 402-
- Issue 4 Pages 322-
- Issue 3 Pages 214-
- Issue 2 Pages 108-
- Issue 1 Pages 002-
Volume 50, Issue 5
Displaying 1-4 of 4 articles from this issue
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Special Review
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Yoshihiro HATTORI2013 Volume 50 Issue 5 Pages 402-406
Published: 2013
Released on J-STAGE: November 15, 2013
JOURNAL OPEN ACCESSElectrophotographic (EP) products for digital production printing all have the same basis. They share many technical resources and applications with office instruments development and have individual applications for the commercial printing market, such as improved image quality or productivity. This report reviews the situation of the Japanese EP equipment industry after 2008 with regard to topical technical improvements. Expectations of future advances are also discussed. In order to improve the image quality, exposure devices with higher pixel densities and adapted image processing methods are being introduced. In order to improve the reliability, some approaches involve correcting image defects or fluctuations. Although the instability of charging characteristics is an intrinsic problem, digital image processing is effective at suppressing this weakness. In order to improve media diversity, the fusing and transfer unit has been modified. In summary, although some defects remain, the EP image quality has reached the level of the offset press.View full abstractDownload PDF (2084K) -
Takehiko SATO2013 Volume 50 Issue 5 Pages 407-412
Published: 2013
Released on J-STAGE: November 15, 2013
JOURNAL OPEN ACCESSWide format inkjet printers are categorized as printers with a printing width of more than 22 in. Here, we present recent developments in UV inkjet technology. The first ever "flat bed" UV inkjet printer was the Inca Eagle44, which was launched in 2001. Over the past several years, the image quality and productivity have increased owing to various R&D efforts with regard to the printing head, ink materials and formulation, UV-LED devices, and novel lamp work. Binary printing heads have been changed to the multi-drop type, which gives a rich and smooth color tone using a light color ink set. First-generation UV inks included multi-functional acrylate monomers to prioritize curing speed rather than the film properties. Combinations of multi-functional and mono-functional monomers with alternatives are being intensively studied to optimize the speed and film properties. A recent important change has been the introduction of UV-LED lamps to UV ink jet printers. The lamps save power, have a long life, can be quickly switched, are lightweight and compact, and produce low amounts of heat. The advantages of UV-LED were realized in our development of the Acuity LED 1600 printer.View full abstractDownload PDF (2144K) -
Hiromi KOBAYASHI2013 Volume 50 Issue 5 Pages 413-421
Published: 2013
Released on J-STAGE: November 15, 2013
JOURNAL OPEN ACCESSAdditive modeling is a method developed and commercialized in the 1980s. It is based on a completely different concept compared to traditional subtractive modeling (CNC milling) : layers of plastic material are added and cured to rapidly and precisely build a final product that is similar in quality to injection parts. At present, additive modeling is widely used in the rapid prototyping and manufacturing of a small quantity of products. Mature inkjet technology has allowed the commercialization of 3D printers: they are compact, easy-to-use, and low-cost yet have high resolution and accuracy. This paper describes the latest 3D printer technologies, applications, and future opportunities.View full abstractDownload PDF (2318K)
Technical Lecture
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Masato KIUCHI2013 Volume 50 Issue 5 Pages 422-425
Published: 2013
Released on J-STAGE: November 15, 2013
JOURNAL OPEN ACCESSTechnical fundamentals had been changed completely by the industrial revolution that took place in England in the mid-18th century. Accordingly, proprietary technology systems for security of printed matter developed gradually. Furthermore, capitalism with advanced money economy was established in the 19th century. Necessary measures already applied to banknotes for conducting anti-counterfeiting were extended to other security printed matter with more functional properties. In the second collection, technics obtained through trials and errors in response to the demand of the society at that time and the way how they were established as a base of security printing technology today will be described.View full abstractDownload PDF (2005K)
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