Development of Modularized Inline Coating System of Multi-Color Offset Printing Press

2013 ◽  
Vol 312 ◽  
pp. 525-528
Author(s):  
Ji Bin Zhao ◽  
Cheng Nan Tong ◽  
Zhao Hua Wang ◽  
Fan Wu
Keyword(s):  
Printing Press ◽  
Coating System ◽  
Offset Printing ◽  
The Press ◽  
New Type ◽  
Printing Machine

A new type of inline coating system is designed and developed. The coating system can be mounted into printing press instead of blanket cleaner. An anilox roller and a sealed duct on the glazing oil transferring part for supplying and transferring the coating oil are introduced. A set of pressure adjusting mechanism is designed for changing the pressure between anilox roller and blanket cylinder, while a set of on-off impression mechanism is arranged to change the position of anilox roller and the on-off impression state. The press can print as normal when the coating system is dismounted. With this coating system, the press can coat prints with glazing oil. This system can be mounted in various type of printing machine. One new type of glazing technology named reverse coating can be achieved when it is mounted in multicolor press.

A Brief Analysis of Vibration on the Printing Area in Ordinary Offset Press

2012 ◽  
Vol 591-593 ◽  
pp. 2091-2094
Author(s):  
Ming Yang ◽  
Jin Yao Li ◽  
Jia Cong Chen ◽  
Shi Jia Kong
Keyword(s):  
Product Development ◽  
Noise Reduction ◽  
Mechanical Vibration ◽  
Practical Experience ◽  
Printing Press ◽  
Print Quality ◽  
Offset Printing ◽  
The Press ◽  
Vibration Performance ◽  
Printing Presses

At the development of modern printing, vibration may course some products quality problems when increases the speed. Practical experience shows that the mechanical vibration of the offset press is an important reason to affect the print quality. Therefore, improving the vibration performance of the printing press and designing the structure of anti-vibration and noise reduction to improve the quality and speed of printing presses is an important issue in the press product development. This paper proposes some reasons and solution ideas of vibration on printing parts in ordinary offset printing machines.

Design and Research on the Clutch Mechanism in Modern Offset Printing Machine

2013 ◽  
Vol 694-697 ◽  
pp. 128-132
Author(s):  
Fang Wang ◽  
Hong Chen
Keyword(s):  
Maximum Amplitude ◽  
Element Model ◽  
Connecting Rod ◽  
Offset Printing ◽  
Vector Method ◽  
Improve Design ◽  
New Type ◽  
Frequency Maximum ◽  
Clutch Mechanism ◽  
Printing Machine

The clutch mechanism is the important part of printing machine. At present, cam connecting rod type mechanical clutch mechanism has been used by most of the domestic offset printing machine and its mechanical structure is very complex and its reliability is very poor. So a new type of pneumatic clutch mechanism is designed to meet its technological requirements. For the new mechanism, the motion law of the blanket cylinder can be calculated in the pressing process by complex number vector method and the finite element model has been established, natural frequency, maximum amplitude and mode of vibration of the cylinder can be calculated based on Block Lanczos method. The analysis results show that the relationship between the cylinders is flexible impact at the pressing instant, positioning is accurate, stable and reliable, which meets flexible design requirements. Thus it is important significance to improve design level and the product quality of the domestic printing machine and shorten the gap with foreign advanced printing machine.

A Fault Diagnosis Method for the Roller-Marks in Offset Printing Machine Based on Texture Recognition

2012 ◽  
Vol 262 ◽  
pp. 361-366
Author(s):  
Zhuo Fei Xu ◽  
Hai Yan Zhang ◽  
Ling Hui Ren
Keyword(s):  
Fault Diagnosis ◽  
High Speed ◽  
Solution Method ◽  
Offset Printing ◽  
Texture Recognition ◽  
Defect Image ◽  
Diagnosis Method ◽  
The Difference ◽  
Detecting Method ◽  
Printing Machine

Roller-mark is a common problem in offset printing and its solution method is important for printing. A new detecting method of texture analysis was given in this paper. In this study, printing image was acquired with high-speed CCD. Compared the difference between printing image and standard image, a defective image was obtained. Then the reason of roller-marks was given by the texture recognition of defect image. Finally, experiments were taken to prove the feasibility and effectiveness of this new method for the roller-marks diagnosis in the offset printing machine.

scholarly journals Errata

1962 ◽  
Vol 3 (1) ◽  
pp. 139-139
Keyword(s):  
East Asia ◽  
South East Asia ◽  
History Of ◽  
New Type ◽  
Image Position ◽  
Printing Machine

Readers of this Journal will recall the provocative article in Vol. 2, No. 2 by John Smail entitled An Autonomous History of South-East Asia. This article has aroused considerable comment. It is all-the-more unfortunate then that it was marred by fifty or more misprints and omissions. With this issue of the Journal we have changed to a new type and printing machine, and we hope such errors as committed before will remain merely the follies of our youth. We attach a list of the more important of the misprints in Mr. Smail's article.

Aeroelastic instability of paper sheet in an offset printing press

2021 ◽  
Author(s):  
Petr Šidlof ◽  
Jan Kolář ◽  
Pavel Peukert ◽  
Martin Pustka ◽  
Pavel Šidlof
Keyword(s):  
Printing Press ◽  
Paper Sheet ◽  
Offset Printing ◽  
Aeroelastic Instability

Court Jews, Printers, Book Publishing, and the Beginning of the Haskalah in the German Lands: The Life History of the Wulffian Printing Press as a Case-Study

2018 ◽  
Vol 12 (1) ◽  
pp. 1-55
Author(s):  
Gad Freudenthal
Keyword(s):  
Eighteenth Century ◽  
Life History ◽  
Book Publishing ◽  
Printing Press ◽  
Continuous Contact ◽  
The Press ◽  
History Of ◽  
Guide Of The Perplexed

Abstract This article presents the history of a printing press that operated at several places near Berlin during the first half of the eighteenth century, culminating in the epoch-making reprinting of Maimonides’ Guide of the Perplexed in 1742. The press was established in Dessau in 1694 by the court Jew Moses Wulff (1661–1729), and was run by several printers, notably the convert Israel b. Abraham (fl. 1715–1752). Using the trajectory of the Wulff press as a case study, I examine the relations between scholars, patrons of learning (especially court Jews), printers, and book publishing. The inquiry will highlight the considerable role that court Jews played in shaping the Jewish bookshelf, notably by choosing which books (reprints and original) would be funded. Surprisingly perhaps, although court Jews were in continuous contact with the environing culture, they did not usually favor the printing of non-traditional Jewish works that would favor a rapprochement.

Research on Dynamic Design Method Based on Measuring Information for Printing Press

2010 ◽  
Vol 174 ◽  
pp. 290-294
Author(s):  
Yi Ming Wang ◽  
Bang She Chen ◽  
Yan Li ◽  
Shao Hua Zhang
Keyword(s):  
Theoretical Model ◽  
Dynamic Characteristics ◽  
High Speed ◽  
Design Method ◽  
Model Analysis ◽  
Printing Press ◽  
Vibration Measurement ◽  
Dynamic Design ◽  
Analysis Experiment ◽  
Printing Machine

Printing machinery’s reliability is one of the most important index parameter and good dynamic characteristics are essential for high speed printing press. The dynamic characteristic is predictable for printing machine with dynamic design. With the complexity of printing technique and printing machine, information, such as load on components is lack, leading to the difficulty of dynamic model solving and further more the dynamic parameters needs to be verified. Firstly, according to the dynamic design method, a dynamic design process based on measuring information for printing machine was put forward. Secondly, on the basis of principle and structure analysis to typical printing machine, dynamic characteristics measurement item and method was determined. With a wallboard of a two-color offset press acting as an example, the utilizing method was illustrated through dynamic modeling, theoretical model analysis, experiment model analysis based on vibration measurement and comparing the theoretical and experimental results. Finally, a Dynamic Design Assistant Platform based Vibration Measurement for Printing Machine was developed and had been used in 10 kinds of printing machine measurement and analysis. The conclusion shows that the tolerance of the theoretical model analysis results and experiment results is allowed. A new approach for new printing machine design and optimal design for existed printing machine is given.

Discussion on Application of 3D Printing Technology in Package Printing

2015 ◽  
Vol 731 ◽  
pp. 300-303 ◽  
Author(s):  
Chen Fei Zhao ◽  
Dan Hui Wu
Keyword(s):  
3D Printing ◽  
Printing Industry ◽  
Offset Printing ◽  
Printing Plate ◽  
Printing Technology ◽  
3D Printing Technology ◽  
Advantages And Disadvantages ◽  
Ink Jet ◽  
Jet Printing ◽  
Printing Machine

The principle of 3D printing technology is based on the basic principle of ink-jet printing. The application of 3D printing in packaging printing is discussed, including printing history, development present situation, the principle, equipment, the advantages and disadvantages of 3D printing. The application of 3D printing in digital printing machine manufacturing and in offset printing plate making and screen plate making is studied. This paper is of great significance for the transformation of the printing industry.

scholarly journals Analysis of Printing Pressure Using Density Measurements of Printed Ink.

2019 ◽  
Vol 11 (01) ◽  
pp. 39-46
Author(s):  
Ramesh R Dendge
Keyword(s):  
Pressure Variation ◽  
Print Quality ◽  
Offset Printing ◽  
Qualitative Information ◽  
Density Measurements ◽  
Covering Material ◽  
Uncoated Paper ◽  
Materials Used ◽  
Printing Machine ◽  
Left Middle

In process-color lithographic sheet-fed offset printing the uniformity of printing pressure is critical in achieving consistent print quality. The variations in printing pressure at blanket and impression cylinder nip affect the resultant print density of process colors. The variations in printing pressure are observed not only within the print run but also in the print area of the sheet. The printing pressure is the function of machine engineering, blanket cylinder covering material, substrate, and thickness of image carrier, packing materials used in packing of blanket and plate cylinder. Many printers, even today, use a feeler gauge to judge the level of printing pressure at two or three places along with the blanket and impression cylinder nip. The conventional feeler gauge method yields qualitative information and considers a very smaller portion of the print area. In this experimental work, the densitometry is used to devise an alternative subjective method to give information about the levels of printing pressure across the print area. The image equalling print area is divided into uniformly spaced small patches and one thousand sheets uncoated paper are printed with cyan color on large format offset printing machine. Three sheets, 101th, 501th, and 901th, representing the start, middle and the end of the print run are selected. Out of each identified sheets, three patches are selected from left middle and right columns giving a total nine locations from across the print area. The reflection densities, of nine cyan patches uniformly covering the print area, are measured using electronic densitometer for each of the sheets and tabulated. This approach, involving statistics, is aimed at providing a quantitative tool to analyze printing pressure variation across the print area and within the print run.

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