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Volume: 27 | Article ID: art00029_1
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Pale Defect of Halftone Following Solid Image in Two-Component Magnetic Brush Development System in Electrophotography
Hiroyuki Kawamoto
Satoshi Iesaka
Takuya Muroga
So Watanabe
  DOI :  10.2352/ISSN.2169-4451.2011.27.1.art00029_1  Published Online :  January 2011
Abstract

We studied the mechanism of and countermeasures against a pale image defect observed in the halftone area following a solid image in a two-component magnetic brush electrophotographic development system. We manufactured a model apparatus consisting of a pseudo-photoreceptor drum, development sleeve, and stationary magnetic roller. The image was created on an insulated film electrode pasted onto the drum. A parameter experiment confirmed that the image defect was enhanced when the voltage difference applied to the solid area and halftone area was large, ac voltage superposed on the dc development voltage was low, the development gap was large, and the speed ratio (sleeve speed to drum speed) was low. However, the defect was almost entirely independent of the frequency and waveform of the superposed ac voltage. The dynamic behavior of toner particles in the development area was directly observed using a high-speed microscope camera, and the mechanism of this print defect was investigated. The results of this experimental work can be utilized to improve the two-component magnetic brush development electrophotographic system.

Journal Title : NIP & Digital Fabrication Conference
Publisher Name : Society of Imaging Science and Technology
Publisher Location : 7003 Kilworth Lane, Springfield, VA 22151, USA
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 DOI 10.2352/ISSN.2169-4451.2011.27.1.art00029_1
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Hiroyuki Kawamoto, Satoshi Iesaka, Takuya Muroga, So Watanabe, "Pale Defect of Halftone Following Solid Image in Two-Component Magnetic Brush Development System in Electrophotography"  in Proc. IS&T Int'l Conf. on Digital Printing Technologies and Digital Fabrication (NIP27),  2011,  pp 113 - 116,  https://doi.org/10.2352/ISSN.2169-4451.2011.27.1.art00029_1

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NIP & Digital Fabrication Conference
nip digi fabric conf
2169-4451
Society of Imaging Science and Technology
7003 Kilworth Lane, Springfield, VA 22151, USA
2169-4451(20110101)2011:1L.113;1-
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Articles
Pale Defect of Halftone Following Solid Image in Two-Component Magnetic Brush Development System in Electrophotography
KawamotoHiroyuki
IesakaSatoshi
MurogaTakuya
WatanabeSo
01012011
2011
1
113
116
2011
We studied the mechanism of and countermeasures against a pale image defect observed in the halftone area following a solid image in a two-component magnetic brush electrophotographic development system. We manufactured a model apparatus consisting of a pseudo-photoreceptor drum, development sleeve, and stationary magnetic roller. The image was created on an insulated film electrode pasted onto the drum. A parameter experiment confirmed that the image defect was enhanced when the voltage difference applied to the solid area and halftone area was large, ac voltage superposed on the dc development voltage was low, the development gap was large, and the speed ratio (sleeve speed to drum speed) was low. However, the defect was almost entirely independent of the frequency and waveform of the superposed ac voltage. The dynamic behavior of toner particles in the development area was directly observed using a high-speed microscope camera, and the mechanism of this print defect was investigated. The results of this experimental work can be utilized to improve the two-component magnetic brush development electrophotographic system.