Image forming apparatus
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United States of America Patent
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Mar 13, 2012
Grant Date -
Mar 5, 2009
app pub date -
Sep 3, 2008
filing date -
Sep 4, 2007
priority date (Note) -
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status (Latency Note)
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Abstract
An image forming apparatus includes a determining section for determining if a value indicative of a size of the background portion in the background pattern is smaller than a predetermined threshold value; and a background pattern correcting section which corrects the background portion and the latent image portion, when the determining section determines that the value is smaller than the threshold value, so that the value indicative of the size of the background portion becomes equal to or larger than the threshold value, and which forms a background pattern having a corrected background portion in which a copy prohibiting pattern is embedded, wherein the image forming section forms on a sheet the background pattern when the determining section determines that the value is smaller than the threshold value, and forms on the sheet the background pattern when the value is equal to or larger than the threshold value.
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