Firmware ADF edge detection algorithms can detect the Top‐Of‐Form
(TOF) and Bottom‐Of‐Form (BOF) of the ADF target media replacing
the ADF edge detection sensors. These algorithms can detect the TOF
only once the paper edge had reached the scanner. This causes losses
in the TOF margin due to the switching overheads from the predefined
TOF detection scan mode to the original client requested scan mode.
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INC, HP, "SYSTEM ARCHITECTURE FOR NEAR PERFECT ADF TOF (TOP-OF-FORM) MARGINS CLOSE TO ZERO MM", Technical Disclosure Commons, (July 08, 2021)