发明授权
US4216282A AC corona to remove background from the imaging member of a magnetic
copier
失效
AC电晕以从磁性复印机的成像构件去除背景
- 专利标题： AC corona to remove background from the imaging member of a magnetic copier
- 专利标题（中）： AC电晕以从磁性复印机的成像构件去除背景
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申请号： US771381申请日： 1977-03-18
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公开(公告)号： US4216282A公开(公告)日： 1980-08-05
- 发明人: Donald W. Edwards , Emery J. Gorondy , Arend Van Roggen
- 申请人： Donald W. Edwards , Emery J. Gorondy , Arend Van Roggen
- 申请人地址： DE Wilmington
- 专利权人： E. I. Du Pont de Nemours and Company
- 当前专利权人： E. I. Du Pont de Nemours and Company
- 当前专利权人地址： DE Wilmington
- 主分类号： G03G19/00
- IPC分类号： G03G19/00 ; G03G21/00 ; G11B5/004
摘要：
A process for reproducing graphic information wherein a magnetic image is formed in a premagnetized layer of acicular chromium dioxide by heating the chromium dioxide selectively to above its Curie point. Ferromagnetic toner particles are then applied uniformly to the chromium dioxide layer, so as to adhere only in the magnetized areas. The toner particles are electrostatically transferred to a substrate and fused into position. Alternating current coronas or other static neutralizing devices are used to neutralize unwanted charges on toner particles which would otherwise cause fuzzy images and unwanted background markings on the final copies.
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