发明授权
- 专利标题: Dry magnetic electrostatic developer
- 专利标题(中): 干磁静电开发商
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申请号: US614679申请日: 1990-11-19
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公开(公告)号: US5112714A公开(公告)日: 1992-05-12
- 发明人: Eiichi Imai , Kiichiro Sakashita , Seiichi Takagi , Tsutomu Kukimoto
- 申请人: Eiichi Imai , Kiichiro Sakashita , Seiichi Takagi , Tsutomu Kukimoto
- 申请人地址: JPX Tokyo
- 专利权人: Canon Kabushiki Kaisha
- 当前专利权人: Canon Kabushiki Kaisha
- 当前专利权人地址: JPX Tokyo
- 优先权: JPX59-182284 19840830; JPX59-182169 19840831; JPX60-82665 19850419; JPX60-84613 19850422
- 主分类号: G03G9/087
- IPC分类号: G03G9/087 ; G03G9/097
摘要:
A dry developer for developing electrostatic images comprises a) toner particles comprising 100 parts by weight of a binder resin and 1-20 parts by weight of polyalkylene having a ratio of weight average molecular weight to number average molecular weight of 2.0-10.0 and Z average molecular weight determined by gel permeation chromatography of 10,000-200,000, and containing 5-60% by weight of a component soluble in n-hexane at boiling point, kinetic friction coefficient of the toner particles being 0.20-0.50, and b) non-magnetic inorganic fine powders having BET specific surface area according to a nitrogen adsorbing method of 0.5-500 m.sup.2 /g.An image forming method comprises using the dry developer to develop electrostatic latent images on a photosensitive member having a surface hardness of 8 g or more, transferring the developed images to a receiving member, and removing the toner particles remaining on the photosensitive member by a cleaning means accompanying abrasion.