Electrophotography – Document handling – Original
Reexamination Certificate
2009-07-27
2011-11-08
Poon, King (Department: 2625)
Electrophotography
Document handling
Original
C358S001900, C358S001140, C358S003280, C283S072000, C283S113000, C283S902000
Reexamination Certificate
active
08055180
ABSTRACT:
A primary test printing process of a plurality of copy-forgery-inhibited pattern images generated by changing one or both of print densities of the latent-image and background-image parts in a first pattern on the basis of a predetermined parameter is performed. The user selects one copy-forgery-inhibited pattern image which has the latent-image and background-image parts with approximate print densities from the plurality of copy-forgery-inhibited pattern images generated by the primary test printing process. A secondary test printing process of a plurality of copy-forgery-inhibited pattern images generated by changing one or both of print densities of the latent-image and background-image parts in a second pattern on the basis of the parameter used to determine the print densities of the latent-image and background-image parts of the selected copy-forgery-inhibited pattern image is performed. The user selects one copy-forgery-inhibited pattern image which has the latent-image and background-image parts with approximate print densities from the plurality of copy-forgery-inhibited pattern images generated by the secondary test printing process, and the parameter of the selected copy-forgery-inhibited pattern image is determined as a copy-forgery-inhibited pattern density parameter.
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Canon Kabushiki Kaisha
Fitzpatrick ,Cella, Harper & Scinto
Poon King
Wills Lawrence
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