Image forming method with improved development
Patent 5338894 Issued on August 16, 1994. Estimated Expiration Date: 
September 20, 2011. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
September 20, 2011. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2297691 3405682 3866574 3890929 3893418 Electrophotographic process and apparatus Toner for developing electrostatic latent image containing copolymer of vinyl compound and acid monomer Electrophotographic one component magnetic toner comprising hydrophobic silica and iron oxide Electrophotographic magnetic toner containing polyalkylene and vinyl polymer Developer and image forming device Patent #: 4957840 InventorsAssigneeApplicationNo. 763253 filed on 09/20/1991US Classes:399/270, Having applied bias399/274, Regulating (e.g., doctor)430/106.2, Binary ferric or ferrous oxide containing magnetic component430/110.4, Having specified toner particle size distribution430/111.4, Identified physical parameter of carrier particle or dry toner particle, etc. (Tg, MW, coercivity, density, etc.)430/120Dry powder developingExaminersPrimary: Donovan, LincolnAssistant: Horgan, Christopher Attorney, Agent or FirmForeign Patent References
International ClassG03G 015/08Foreign Application Priority Data1990-09-21 JPAbstractAn image forming method in which a toner-carrying member for carrying a specific magnetic toner is placed adjacent a latent image-bearing member for carrying an electrostatic latent image so as to form a developing region of a predetermined gap size. The magnetic toner on the toner-carrying member forms a toner layer of a regulated thickness smaller than the above-mentioned gap. An asymmetric bias is applied to the magnetic toner so as to cause the magnetic toner from the toner-carrying member to be conveyed to the latent image-bearing member thereby to develop the electrostatic latent image. |
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