Document original simulator for image fogging detection, and image fogging troubleshooting method and image forming apparatus using the same
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 14, 2000
Grant Date -
N/A
app pub date -
Apr 7, 1999
filing date -
Apr 28, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A document original simulator including first tone simulation portion having substantially the same reflectance as a white original sheet and a second tone simulation portion having a lower reflectance than the first tone simulation portion. When an image fogging detecting operation is to be performed with the use of the document original simulator, it is checked whether or not the amount of light reflected from the first tone simulation portion when the first tone simulation portion is illuminated with light is smaller than the amount of light reflected from the white original sheet placed on a document original presenting section when the white original sheet is illuminated with light. If the amount of the light reflected from the first tone simulation portion of the document original simulator is smaller than the amount of the light reflected from the white original sheet, the image fogging detecting operation is performed with the use of the first tone simulation portion of the document original simulator. If not, the image fogging detecting operation is performed with the use of the second tone simulation portion of the document original simulator.
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