Magnetic developing method under A.C. electrical bias and apparatus therefor
Patent 4292387 Issued on September 29, 1981. Estimated Expiration Date: 
July 18, 1999. 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.
July 18, 1999. 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 3346475 3866574 3890929 3893418 3918966 Image developing system Development system with electrical field generating means Patent #: 4102305 InventorsAssigneeApplicationNo. 06/058435 filed on 07/18/1979US Classes:430/102, Selective toner release399/314, Having applied bias430/122, Using magnetic brush430/903One component tonerExaminersPrimary: Martin, Roland E. Jr.Attorney, Agent or FirmInternational ClassesG03G 13/09 (20060101)G03G 13/06 (20060101) G03G 15/06 (20060101) G03G 15/09 (20060101) Foreign Application Priority Data1978-07-28 JPAbstractThis specification discloses a method of toner transfer development in which one-component magnetic developer is conveyed to a developing position by the action of a magnetic field and a low frequency alternating electrical bias is applied to the space between a latent image bearing member and a developer carrying member at that position to thereby develop a latent image. This development provides visible images excellent in sharpness and tone reproduction. |
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