Invisible electrostatic tracking indicia for color plotters
Patent 4740802 Issued on April 26, 1988. Estimated Expiration Date: 
July 2, 2006. 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 2, 2006. 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 ReferencesMethod and apparatus for creating color copies of an original by an electrostatic charging process Patent #: 4007489 InventorsAssigneeApplicationNo. 06/880988 filed on 07/02/1986US Classes:347/115, Multicolor347/141, Specific electrostatic head399/16Document handlingExaminersPrimary: Evans, Arthur G.Attorney, Agent or FirmInternational ClassesG03G 15/01 (20060101)H04N 1/50 (20060101) AbstractA method for determining the position of media in a system where images are applied to the media at subsequent stations includes the steps of placing on the media at a first position tracking information consisting of a pattern of electrostatic charge to provide information with regard to the alignment of the media at the first station, and at the second station detecting the pattern of electrostatic charge to determine the alignment of the media at the second station. Typically the media consists of electrostatic paper and the step of placing charge on the paper is achieved by positioning positively charged styli in close proximity to the surface of the paper. | |
