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서성철(SungChul Seo),조용민(YongMin Cho),김미나(Mina Kim),이승길(Seungil Lee),김해준(HaeJoon Kim),이동현(Donghyun Lee),최재욱(Jae-Wook Choi) 한국실내환경학회 2011 한국실내환경학회지 Vol.8 No.4
The aim of this study was to compare the concentrations of airborne pollutants (i.e., PMs, TVOC, and ozone) released from a laser printer with a new and/or a refilled toner cartridge. Also we compared the concentrations before and after attaching a HEPA filter at the outlet of exhausted air for each printer. PMs, TVOC, and ozone were released from all three different branded printers with both toner cartridges in accordance with their both a brand new and a used condition. For PMs, there were generally significant differences of concentrations between a brand new and used toner (p<0.05). Ozone level differences were found between a new and a refilled toner, but were not significant (p>0.05). For TVOC, there were significant differences of concentrations among brands, and toluene (3.46 ㎎/㎥) only was identified. The overall 70% of reduction for PMs' concentrations occurred after attaching a HEPA filter(p<0.05), and these results were pronounced for TSP. These results showed that similar levels of airborne pollutants were released from a laser printer with a new and a refilled toner cartridge. Also, these results indicate that the usage of a HEPA filter may be an effective method for reducing the released pollutants from a laser printer.
컬러 레이저 프린터에서 검출되는 Yellow Dots의 특성
최영호(Young-Ho Choi),이덕호(Doek-Ho Lee),윤영미(Young-Mi Yoon),홍현식(Heon-Sich Hong),신종연(Jong-Yeon Shin),윤기형(Kee-Hyung Yoon) 한국콘텐츠학회 2012 한국콘텐츠학회논문지 Vol.12 No.12
본 논문에서는 HP 컬러 레이저 프린터 기기의 출력물에 나타나는 Yellow Dots의 형태를 분석하고자, 각각 시간의 경과, 연과 월의 경과 그리고 동일한 기종에 따른 Yellow Dots의 특성을 실험하였다. 그 결과, 동일한 프린터기기의 출력물에서는 시간의 경과, 연과 월의 경과에서 나타나는 Yellow Dots의 형태가 동일한 것을 알 수 있었다. HP 컬러 레이저젯 프린터 기기에는 Xerox사에서 출시된 컬러 레이저젯 프린터기기와는 다르게 시간과 날짜 정보가 임베딩 되지 않았다는 것을 가정 할 수 있었다. 또한 시리얼 넘버가 다른 프린터기기에서는 유사하지만 다른 형태의 Yellow Dots가 나타나는 것을 알 수 있었으며, 이것은 프린터기기 구분에 있어 큰 도움이 된다. 마지막으로 실험에 사용된 모든 HP 컬러 레이저 프린터 기기들의 Yellow Dots를 분석한 결과, 동일한 패턴을 찾을 수 있었으며, 그 결과를 통하여 제조사를 파악 할 수 있었다. 향후 Yellow Dots 패턴을 해독하고 나아가 타 제조사의 Yellow Dots를 검출 및 분석하는 연구가 진행되어져야 한다. To analyzed the shape of Yellow Dots which appeared on the paper printed HP color laser printer, and analyzed the characteristic of Yellow Dots according to time, month, year and same printers. As a result, documents that printed in same printers had an identical Yellow Dots’s shapes according to time, month, year. It was presupposed that was not embedded time and date information in HP Color LaserJet printers against Xerox, and printers which have different serial number had similar shapes but it was not identical Yellow Dots. Finally, it was found to be identical patterns in Yellow Dots of HP Color LaserJet printers used analysis. Depending on the results, it could understand HP’s pattern. In the future, it will decipher patterns of Yellow Dots which have other informations to include other printer manufacturer.
사무용기기에서 발생되는 미세입자 측정 및 분석방법 연구
이경환 한국입자에어로졸학회 2010 Particle and Aerosol Research Vol.6 No.3
As the indoor activity increases in recent years, the indoor air quality becomes more important. One of the major contaminants in office space is the copy machines and the laser based printers. These devices usually emit nano-particles and chemical species that may give some health effect. The amount of particles generated by the printers and copy machines depend on printer models, printing speed, toners, papers, humidity and so on. To evaluate the emission rate of nano-particles from Laser Printers, the mass concentration measurement method has been used (BAM, 2004). However, the mass concentration measurement method for nano-particles is tedious and time consuming. Therefore, for the development of a new nano-particle counting method, the nano-particle emission characteristics and size distributions are evaluated. As the indoor activity increases in recent years, the indoor air quality becomes more important. One of the major contaminants in office space is the copy machines and the laser based printers. These devices usually emit nano-particles and chemical species that may give some health effect. The amount of particles generated by the printers and copy machines depend on printer models, printing speed, toners, papers, humidity and so on. To evaluate the emission rate of nano-particles from Laser Printers, the mass concentration measurement method has been used (BAM, 2004). However, the mass concentration measurement method for nano-particles is tedious and time consuming. Therefore, for the development of a new nano-particle counting method, the nano-particle emission characteristics and size distributions are evaluated.
레이저 프린터 내부 유로 설계를 통한 방열 효율 개선에 관한 연구
최정범(Jung-Bum Choi),김태영(Tae-Young Kim),고한서(Han Seo Ko) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.11
Thermal flows inside a laser printer have been affected by generated heat from a fuser and boards. Thus, the effect of fans has been investigated to control the thermal flows and behaviors of toners. In order to analyze the phenomena experimentally, a PIV (Particle Image Velocimetry) has been used, and then the flow inside the printer has been predicted by the CFD (Computational Fluid Dynamics) in this study to determine the efficient flow distribution by optimum design of the printer. The determined optimum design has been confirmed by the developed flow visualization technique so that the efficiency of the laser printer can be improved.
온도에 의한 광주사장치의 인쇄화상변동 분석을 위한 CAE 기법
유병호(ByoungHo Yoo),김태규(TaeGyu Kim),김형채(HyeongChae Kim) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.11
One of the major factors related to printed image quality is the robustness to the environmental temperature inside laser printer. The vital part out of these modules is the Laser Scanning Unit, which has thermal sources inside and made of plastic materials with high thermal expansion coefficient. In this study, mold-injection process of plastic material, thermal deformation of structure, and geometrical optics are involved. A numerical study procedure is developed to evaluate the robustness and error of printed image caused by thermal deformation of laser scanning unit.
Analysis of Flow Distribution for Laser Printer Using PIV Technique
김승배(Seung-Bae Kim),이수홍(Soo-Hong Lee),김태규(Tae-Kyu Kim),이호렬(Ho-Ryul Lee),고한서(Han Seo Ko) 한국가시화정보학회 2010 한국가시화정보학회지 Vol.8 No.3
Thermal flows inside a laser printer are affected by generated heat from a fuser and boards. Thus, the effect of fans has been investigated to control the thermal flows and behaviors of toners. In order to analyze the phenomena experimentally, a PIV (Particle Image Velocimetry) has been used, and then the flow inside the printer has been predicted by the CFD (Computational Fluid Dynamics) in this study to determine the efficient flow distribution by an optimum design of the printer. The determined optimum design has been confirmed by the developed PIV technique so that the efficiency of the laser printer can be improved by the proposed design.
가시화 기법을 이용한 레이저 프린터 유동 분포 분석에 관한 연구
김승배(Seungbae Kim),김태규(Tae-Kyu Kim),이호렬(Ho-Ryul Lee),김성대(Sung-Dae Kim),고한서(Han Seo Ko) 한국가시화정보학회 2010 한국가시화정보학회 학술발표대회 논문집 Vol.2010 No.11
Thermal flows inside a laser printer have been affected by generated heat from a fuser and boards. Thus, the effect of fans has been investigated to control the thermal flows and behaviors of toners. In order to analyze the phenomena experimentally, a PIV (Particle Image Velocimetry) has been used, and then the flow inside the printer has been predicted by the CFD (Computational Fluid Dynamics) in this study to determine the efficient flow distribution by optimum design of the printer. The determined optimum design has been confirmed by the developed flow visualization technique so that the efficiency of the laser printer can be improved by the proposed design.
고영준(Young-Jun Ko),이수영(Soo-Yeong Yi),이준오(Jun-O Lee) 제어로봇시스템학회 2016 제어·로봇·시스템학회 논문지 Vol.22 No.3
This paper addresses the development of 3D data acquisition system (3D scanner) based laser structured-light image. The 3D scanner consists of a stripe laser generator, a conventional camera, and a rotation table. The stripe laser onto an object has distortion according to 3D shape of an object. By analyzing the distortion of the laser stripe in a camera image, the scanner obtains a group of 3D point data of the object. A simple semiconductor stripe laser diode is adopted instead of an expensive LCD projector for complex structured-light pattern. The camera has an optical filter to remove illumination noise and improve the performance of the distance measurement. Experimental results show the 3D data acquisition performance of the scanner with less than 0.2㎜ measurement error in 2 minutes. It is possible to reconstruct a 3D shape of an object and to reproduce the object by a commercially available 3D printer.
전성훈(Sung Hoon Jun),김민석(Minseok Kim),김숙한(Sookhan Kim),이응기(Eung Ki Lee) 한국생산제조학회 2011 한국생산제조시스템학회 학술발표대회 논문집 Vol.2011 No.4
Doctor blade which is required for precision and durability as main specifications is a core part for product life cycle and quality at a toner cartridge for a laser printer. A study about automation system is needed because of difficulty of mass-producing doctor blades at present. This paper was researched about technique automating production line of doctor blade. Automated manufacturing process for doctor blade consists of six steps that are supply of raw material, punching and cutting, pressing, supply of brackets, laser welding and moving finished product. And each step also was studied in this paper.
전성훈(Sung Hoon Jun),이응기(Eung Ki Lee) 한국생산제조학회 2012 한국생산제조학회지 Vol.21 No.4
The doctor blade is a core part of a laser printer and directly influences the printing quality. The main specifications for doctor blades ate for them to be precise and durable. It is necessary to study an automatic production system for doctor blades in order to obtain high-efficient manufacturing processes. In this paper, the technology and the design of the automatic production line has for manufacturing doctor blades has been researched. The automated manufacturing process consists of five steps, which are the supplying of raw material, shearing, bending, bracket supplying, and the laser-spot welding process. The proposed automatic manufacturing system allowed for faster and more reliable production of doctor blades.